./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe015_pso.oepc_pso.opt_tso.oepc_tso.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/mutex-meet/safe015_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cde23df1 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe015_pso.oepc_pso.opt_tso.oepc_tso.opt.i ./goblint.2024-05-21_14-57-05.files/mutex-meet/safe015_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-cde23df-m [2024-06-14 14:00:57,341 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-14 14:00:57,419 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-14 14:00:57,424 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-14 14:00:57,425 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-14 14:00:57,454 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-14 14:00:57,455 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-14 14:00:57,456 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-14 14:00:57,456 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-14 14:00:57,460 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-14 14:00:57,460 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-14 14:00:57,461 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-14 14:00:57,462 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-14 14:00:57,463 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-14 14:00:57,463 INFO L153 SettingsManager]: * Use SBE=true [2024-06-14 14:00:57,464 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-14 14:00:57,464 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-14 14:00:57,464 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-14 14:00:57,464 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-14 14:00:57,465 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-14 14:00:57,465 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-14 14:00:57,465 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-14 14:00:57,466 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-14 14:00:57,466 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-14 14:00:57,466 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-14 14:00:57,467 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-14 14:00:57,467 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-14 14:00:57,467 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-14 14:00:57,468 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-14 14:00:57,468 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-14 14:00:57,469 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-14 14:00:57,469 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-14 14:00:57,469 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 14:00:57,470 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-14 14:00:57,470 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-14 14:00:57,470 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-14 14:00:57,470 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-14 14:00:57,471 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-14 14:00:57,471 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-14 14:00:57,486 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-14 14:00:57,486 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-14 14:00:57,488 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-14 14:00:57,488 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-14 14:00:57,488 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-14 14:00:57,748 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-14 14:00:57,777 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-14 14:00:57,779 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-14 14:00:57,780 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-14 14:00:57,781 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-14 14:00:57,782 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/mutex-meet/safe015_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml [2024-06-14 14:00:57,940 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-14 14:00:57,941 INFO L274 PluginConnector]: CDTParser initialized [2024-06-14 14:00:57,941 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe015_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-14 14:00:59,118 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-14 14:00:59,454 INFO L384 CDTParser]: Found 1 translation units. [2024-06-14 14:00:59,458 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe015_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-14 14:00:59,478 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b8ebe2f1/aa08074a2d3846b5aff27a16bde75f9e/FLAG7b3067ba9 [2024-06-14 14:00:59,495 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b8ebe2f1/aa08074a2d3846b5aff27a16bde75f9e [2024-06-14 14:00:59,495 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-14 14:00:59,497 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-14 14:00:59,499 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-14 14:00:59,499 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-14 14:00:59,503 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-14 14:00:59,504 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 02:00:57" (1/2) ... [2024-06-14 14:00:59,505 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@641532ac and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 02:00:59, skipping insertion in model container [2024-06-14 14:00:59,505 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 02:00:57" (1/2) ... [2024-06-14 14:00:59,506 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@9d90fa6 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 02:00:59, skipping insertion in model container [2024-06-14 14:00:59,507 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 02:00:59" (2/2) ... [2024-06-14 14:00:59,507 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@641532ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 02:00:59, skipping insertion in model container [2024-06-14 14:00:59,507 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 02:00:59" (2/2) ... [2024-06-14 14:00:59,508 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-14 14:00:59,554 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-14 14:00:59,555 INFO L97 edCorrectnessWitness]: Location invariant before [L783-L783] ((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || ((((((((((((((((((((long long )__unbuffered_cnt + (long long )__unbuffered_p0_EAX >= 0LL && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )x + (long long )y >= 0LL) && (2LL + (long long )__unbuffered_cnt) - (long long )y >= 0LL) && (2LL + (long long )__unbuffered_p0_EAX) - (long long )y >= 0LL) && (2LL + (long long )__unbuffered_p2_EAX) - (long long )y >= 0LL) && (2LL + (long long )main$tmp_guard1) - (long long )y >= 0LL) && (2LL + (long long )x) - (long long )y >= 0LL))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p2_EAX) && 0 <= x) && 0 <= y) && __unbuffered_p0_EAX <= 127) && __unbuffered_p2_EAX <= 127) && y <= 2) && y <= 127) && ((__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)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) [2024-06-14 14:00:59,556 INFO L97 edCorrectnessWitness]: Location invariant before [L781-L781] ((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || ((((((((((((((((((((long long )__unbuffered_cnt + (long long )__unbuffered_p0_EAX >= 0LL && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )x + (long long )y >= 0LL) && (2LL + (long long )__unbuffered_cnt) - (long long )y >= 0LL) && (2LL + (long long )__unbuffered_p0_EAX) - (long long )y >= 0LL) && (2LL + (long long )__unbuffered_p2_EAX) - (long long )y >= 0LL) && (2LL + (long long )main$tmp_guard1) - (long long )y >= 0LL) && (2LL + (long long )x) - (long long )y >= 0LL))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p2_EAX) && 0 <= x) && 0 <= y) && __unbuffered_p0_EAX <= 127) && __unbuffered_p2_EAX <= 127) && y <= 2) && y <= 127) && ((__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)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) [2024-06-14 14:00:59,556 INFO L97 edCorrectnessWitness]: Location invariant before [L784-L784] ((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || ((((((((((((((((((((long long )__unbuffered_cnt + (long long )__unbuffered_p0_EAX >= 0LL && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )x + (long long )y >= 0LL) && (2LL + (long long )__unbuffered_cnt) - (long long )y >= 0LL) && (2LL + (long long )__unbuffered_p0_EAX) - (long long )y >= 0LL) && (2LL + (long long )__unbuffered_p2_EAX) - (long long )y >= 0LL) && (2LL + (long long )main$tmp_guard1) - (long long )y >= 0LL) && (2LL + (long long )x) - (long long )y >= 0LL))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p2_EAX) && 0 <= x) && 0 <= y) && __unbuffered_p0_EAX <= 127) && __unbuffered_p2_EAX <= 127) && y <= 2) && y <= 127) && ((__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)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) [2024-06-14 14:00:59,556 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-14 14:00:59,556 INFO L106 edCorrectnessWitness]: ghost_update [L779-L779] multithreaded = 1; [2024-06-14 14:00:59,596 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-14 14:00:59,909 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 14:00:59,919 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-14 14:01:00,090 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 14:01:00,138 INFO L206 MainTranslator]: Completed translation [2024-06-14 14:01:00,140 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 02:01:00 WrapperNode [2024-06-14 14:01:00,140 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-14 14:01:00,141 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-14 14:01:00,141 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-14 14:01:00,141 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-14 14:01:00,147 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 02:01:00" (1/1) ... [2024-06-14 14:01:00,177 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 02:01:00" (1/1) ... [2024-06-14 14:01:00,216 INFO L138 Inliner]: procedures = 175, calls = 44, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 65 [2024-06-14 14:01:00,216 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-14 14:01:00,218 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-14 14:01:00,218 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-14 14:01:00,218 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-14 14:01:00,228 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 02:01:00" (1/1) ... [2024-06-14 14:01:00,228 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 02:01:00" (1/1) ... [2024-06-14 14:01:00,233 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 02:01:00" (1/1) ... [2024-06-14 14:01:00,257 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-14 14:01:00,257 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 02:01:00" (1/1) ... [2024-06-14 14:01:00,258 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 02:01:00" (1/1) ... [2024-06-14 14:01:00,272 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 02:01:00" (1/1) ... [2024-06-14 14:01:00,273 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 02:01:00" (1/1) ... [2024-06-14 14:01:00,275 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 02:01:00" (1/1) ... [2024-06-14 14:01:00,276 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 02:01:00" (1/1) ... [2024-06-14 14:01:00,278 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-14 14:01:00,279 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-14 14:01:00,279 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-14 14:01:00,279 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-14 14:01:00,280 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 02:01:00" (1/1) ... [2024-06-14 14:01:00,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 14:01:00,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 14:01:00,305 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-14 14:01:00,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-14 14:01:00,342 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-14 14:01:00,343 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-14 14:01:00,343 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-14 14:01:00,343 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-14 14:01:00,343 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-14 14:01:00,344 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-14 14:01:00,344 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-14 14:01:00,344 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-14 14:01:00,344 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-14 14:01:00,344 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-14 14:01:00,344 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-14 14:01:00,345 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-14 14:01:00,346 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-14 14:01:00,494 INFO L244 CfgBuilder]: Building ICFG [2024-06-14 14:01:00,497 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-14 14:01:00,817 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-14 14:01:00,817 INFO L293 CfgBuilder]: Performing block encoding [2024-06-14 14:01:00,925 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-14 14:01:00,925 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-14 14:01:00,925 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 02:01:00 BoogieIcfgContainer [2024-06-14 14:01:00,926 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-14 14:01:00,957 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-14 14:01:00,957 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-14 14:01:00,960 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-14 14:01:00,960 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 02:00:57" (1/4) ... [2024-06-14 14:01:00,962 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50975d24 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 02:01:00, skipping insertion in model container [2024-06-14 14:01:00,964 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.06 02:00:59" (2/4) ... [2024-06-14 14:01:00,964 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50975d24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 02:01:00, skipping insertion in model container [2024-06-14 14:01:00,964 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 02:01:00" (3/4) ... [2024-06-14 14:01:00,964 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50975d24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 02:01:00, skipping insertion in model container [2024-06-14 14:01:00,964 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 02:01:00" (4/4) ... [2024-06-14 14:01:00,966 INFO L112 eAbstractionObserver]: Analyzing ICFG safe015_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-14 14:01:00,982 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-14 14:01:00,983 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-14 14:01:00,983 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-14 14:01:01,067 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-14 14:01:01,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-14 14:01:01,140 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-14 14:01:01,140 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 14:01:01,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 39 events. 0/39 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 70 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-14 14:01:01,142 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-14 14:01:01,148 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-14 14:01:01,164 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-14 14:01:01,171 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;@41dc5218, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-14 14:01:01,171 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-14 14:01:01,178 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-14 14:01:01,178 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-14 14:01:01,178 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 14:01:01,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:01:01,179 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-14 14:01:01,180 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:01:01,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:01:01,185 INFO L85 PathProgramCache]: Analyzing trace with hash -1782944907, now seen corresponding path program 1 times [2024-06-14 14:01:01,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:01:01,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447097171] [2024-06-14 14:01:01,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:01:01,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:01:01,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:01,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:01:01,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:01,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447097171] [2024-06-14 14:01:01,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447097171] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:01,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:01,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-14 14:01:01,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066671174] [2024-06-14 14:01:01,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:01,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-14 14:01:01,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:01,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-14 14:01:01,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-14 14:01:01,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-14 14:01:01,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:01,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:01,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-14 14:01:01,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:02,175 INFO L124 PetriNetUnfolderBase]: 603/1019 cut-off events. [2024-06-14 14:01:02,176 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2024-06-14 14:01:02,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2013 conditions, 1019 events. 603/1019 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 5138 event pairs, 376 based on Foata normal form. 1/963 useless extension candidates. Maximal degree in co-relation 1998. Up to 929 conditions per place. [2024-06-14 14:01:02,192 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 30 selfloop transitions, 4 changer transitions 0/43 dead transitions. [2024-06-14 14:01:02,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 43 transitions, 169 flow [2024-06-14 14:01:02,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-14 14:01:02,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-14 14:01:02,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 85 transitions. [2024-06-14 14:01:02,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6746031746031746 [2024-06-14 14:01:02,208 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 85 transitions. [2024-06-14 14:01:02,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 43 transitions, 169 flow [2024-06-14 14:01:02,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 43 transitions, 164 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-14 14:01:02,216 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-14 14:01:02,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2024-06-14 14:01:02,222 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-14 14:01:02,222 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-14 14:01:02,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:02,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:01:02,223 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:01:02,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-14 14:01:02,223 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:01:02,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:01:02,225 INFO L85 PathProgramCache]: Analyzing trace with hash 281906836, now seen corresponding path program 1 times [2024-06-14 14:01:02,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:01:02,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277387458] [2024-06-14 14:01:02,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:01:02,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:01:02,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:02,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:01:02,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:02,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277387458] [2024-06-14 14:01:02,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277387458] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:02,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:02,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 14:01:02,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609504139] [2024-06-14 14:01:02,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:02,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 14:01:02,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:02,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 14:01:02,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-14 14:01:02,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-14 14:01:02,647 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:02,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:02,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-14 14:01:02,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:02,819 INFO L124 PetriNetUnfolderBase]: 604/1029 cut-off events. [2024-06-14 14:01:02,819 INFO L125 PetriNetUnfolderBase]: For 201/209 co-relation queries the response was YES. [2024-06-14 14:01:02,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2339 conditions, 1029 events. 604/1029 cut-off events. For 201/209 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 5201 event pairs, 320 based on Foata normal form. 7/1010 useless extension candidates. Maximal degree in co-relation 2324. Up to 903 conditions per place. [2024-06-14 14:01:02,827 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 39 selfloop transitions, 11 changer transitions 0/59 dead transitions. [2024-06-14 14:01:02,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 59 transitions, 266 flow [2024-06-14 14:01:02,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 14:01:02,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 14:01:02,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 115 transitions. [2024-06-14 14:01:02,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6845238095238095 [2024-06-14 14:01:02,830 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 115 transitions. [2024-06-14 14:01:02,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 59 transitions, 266 flow [2024-06-14 14:01:02,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 59 transitions, 262 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 14:01:02,835 INFO L231 Difference]: Finished difference. Result has 47 places, 44 transitions, 174 flow [2024-06-14 14:01:02,835 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=174, PETRI_PLACES=47, PETRI_TRANSITIONS=44} [2024-06-14 14:01:02,836 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 4 predicate places. [2024-06-14 14:01:02,837 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 44 transitions, 174 flow [2024-06-14 14:01:02,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:02,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:01:02,838 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:01:02,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-14 14:01:02,841 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:01:02,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:01:02,842 INFO L85 PathProgramCache]: Analyzing trace with hash 1529058956, now seen corresponding path program 1 times [2024-06-14 14:01:02,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:01:02,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809219868] [2024-06-14 14:01:02,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:01:02,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:01:02,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:03,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:01:03,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:03,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809219868] [2024-06-14 14:01:03,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809219868] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:03,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:03,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 14:01:03,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317989551] [2024-06-14 14:01:03,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:03,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 14:01:03,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:03,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 14:01:03,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-14 14:01:03,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:01:03,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 44 transitions, 174 flow. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:03,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:03,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:01:03,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:03,404 INFO L124 PetriNetUnfolderBase]: 934/1514 cut-off events. [2024-06-14 14:01:03,404 INFO L125 PetriNetUnfolderBase]: For 1013/1013 co-relation queries the response was YES. [2024-06-14 14:01:03,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4065 conditions, 1514 events. 934/1514 cut-off events. For 1013/1013 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 7563 event pairs, 515 based on Foata normal form. 2/1514 useless extension candidates. Maximal degree in co-relation 4047. Up to 1394 conditions per place. [2024-06-14 14:01:03,416 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 49 selfloop transitions, 9 changer transitions 0/65 dead transitions. [2024-06-14 14:01:03,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 65 transitions, 365 flow [2024-06-14 14:01:03,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 14:01:03,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 14:01:03,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 104 transitions. [2024-06-14 14:01:03,418 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-14 14:01:03,418 INFO L175 Difference]: Start difference. First operand has 47 places, 44 transitions, 174 flow. Second operand 4 states and 104 transitions. [2024-06-14 14:01:03,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 65 transitions, 365 flow [2024-06-14 14:01:03,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 65 transitions, 361 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-14 14:01:03,422 INFO L231 Difference]: Finished difference. Result has 52 places, 52 transitions, 250 flow [2024-06-14 14:01:03,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=250, PETRI_PLACES=52, PETRI_TRANSITIONS=52} [2024-06-14 14:01:03,423 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 9 predicate places. [2024-06-14 14:01:03,423 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 52 transitions, 250 flow [2024-06-14 14:01:03,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:03,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:01:03,423 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:01:03,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-14 14:01:03,424 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:01:03,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:01:03,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1136654126, now seen corresponding path program 1 times [2024-06-14 14:01:03,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:01:03,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808305259] [2024-06-14 14:01:03,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:01:03,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:01:03,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:03,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:01:03,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:03,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808305259] [2024-06-14 14:01:03,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808305259] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:03,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:03,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:01:03,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861434991] [2024-06-14 14:01:03,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:03,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:01:03,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:03,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:01:03,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:01:03,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-14 14:01:03,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 52 transitions, 250 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:03,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:03,686 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-14 14:01:03,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:04,017 INFO L124 PetriNetUnfolderBase]: 934/1539 cut-off events. [2024-06-14 14:01:04,017 INFO L125 PetriNetUnfolderBase]: For 1914/1935 co-relation queries the response was YES. [2024-06-14 14:01:04,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4648 conditions, 1539 events. 934/1539 cut-off events. For 1914/1935 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 7910 event pairs, 249 based on Foata normal form. 20/1540 useless extension candidates. Maximal degree in co-relation 4626. Up to 1283 conditions per place. [2024-06-14 14:01:04,028 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 59 selfloop transitions, 19 changer transitions 0/88 dead transitions. [2024-06-14 14:01:04,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 88 transitions, 516 flow [2024-06-14 14:01:04,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:01:04,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:01:04,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 163 transitions. [2024-06-14 14:01:04,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6468253968253969 [2024-06-14 14:01:04,031 INFO L175 Difference]: Start difference. First operand has 52 places, 52 transitions, 250 flow. Second operand 6 states and 163 transitions. [2024-06-14 14:01:04,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 88 transitions, 516 flow [2024-06-14 14:01:04,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 88 transitions, 512 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-14 14:01:04,036 INFO L231 Difference]: Finished difference. Result has 58 places, 57 transitions, 329 flow [2024-06-14 14:01:04,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=329, PETRI_PLACES=58, PETRI_TRANSITIONS=57} [2024-06-14 14:01:04,037 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 15 predicate places. [2024-06-14 14:01:04,037 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 57 transitions, 329 flow [2024-06-14 14:01:04,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:04,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:01:04,038 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:01:04,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-14 14:01:04,038 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:01:04,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:01:04,039 INFO L85 PathProgramCache]: Analyzing trace with hash 132057963, now seen corresponding path program 1 times [2024-06-14 14:01:04,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:01:04,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483881875] [2024-06-14 14:01:04,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:01:04,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:01:04,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:04,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:01:04,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:04,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483881875] [2024-06-14 14:01:04,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483881875] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:04,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:04,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 14:01:04,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886760404] [2024-06-14 14:01:04,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:04,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 14:01:04,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:04,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 14:01:04,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-14 14:01:04,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:01:04,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 57 transitions, 329 flow. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:04,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:04,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:01:04,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:04,563 INFO L124 PetriNetUnfolderBase]: 953/1562 cut-off events. [2024-06-14 14:01:04,563 INFO L125 PetriNetUnfolderBase]: For 2704/2706 co-relation queries the response was YES. [2024-06-14 14:01:04,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5180 conditions, 1562 events. 953/1562 cut-off events. For 2704/2706 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 7927 event pairs, 379 based on Foata normal form. 4/1565 useless extension candidates. Maximal degree in co-relation 5154. Up to 1429 conditions per place. [2024-06-14 14:01:04,578 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 53 selfloop transitions, 9 changer transitions 0/69 dead transitions. [2024-06-14 14:01:04,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 69 transitions, 486 flow [2024-06-14 14:01:04,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 14:01:04,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 14:01:04,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 101 transitions. [2024-06-14 14:01:04,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6011904761904762 [2024-06-14 14:01:04,580 INFO L175 Difference]: Start difference. First operand has 58 places, 57 transitions, 329 flow. Second operand 4 states and 101 transitions. [2024-06-14 14:01:04,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 69 transitions, 486 flow [2024-06-14 14:01:04,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 69 transitions, 448 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-14 14:01:04,585 INFO L231 Difference]: Finished difference. Result has 59 places, 58 transitions, 322 flow [2024-06-14 14:01:04,585 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=291, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=322, PETRI_PLACES=59, PETRI_TRANSITIONS=58} [2024-06-14 14:01:04,586 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 16 predicate places. [2024-06-14 14:01:04,586 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 58 transitions, 322 flow [2024-06-14 14:01:04,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:04,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:01:04,587 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:01:04,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-14 14:01:04,587 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:01:04,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:01:04,588 INFO L85 PathProgramCache]: Analyzing trace with hash -207844287, now seen corresponding path program 1 times [2024-06-14 14:01:04,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:01:04,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250156148] [2024-06-14 14:01:04,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:01:04,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:01:04,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:04,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:01:04,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:04,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250156148] [2024-06-14 14:01:04,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250156148] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:04,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:04,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 14:01:04,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379137887] [2024-06-14 14:01:04,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:04,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 14:01:04,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:04,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 14:01:04,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 14:01:04,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:01:04,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 58 transitions, 322 flow. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:04,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:04,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:01:04,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:05,109 INFO L124 PetriNetUnfolderBase]: 964/1574 cut-off events. [2024-06-14 14:01:05,110 INFO L125 PetriNetUnfolderBase]: For 3150/3150 co-relation queries the response was YES. [2024-06-14 14:01:05,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5244 conditions, 1574 events. 964/1574 cut-off events. For 3150/3150 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 7901 event pairs, 354 based on Foata normal form. 2/1574 useless extension candidates. Maximal degree in co-relation 5217. Up to 1387 conditions per place. [2024-06-14 14:01:05,124 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 64 selfloop transitions, 16 changer transitions 0/87 dead transitions. [2024-06-14 14:01:05,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 87 transitions, 591 flow [2024-06-14 14:01:05,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 14:01:05,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 14:01:05,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 130 transitions. [2024-06-14 14:01:05,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-14 14:01:05,125 INFO L175 Difference]: Start difference. First operand has 59 places, 58 transitions, 322 flow. Second operand 5 states and 130 transitions. [2024-06-14 14:01:05,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 87 transitions, 591 flow [2024-06-14 14:01:05,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 87 transitions, 579 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-06-14 14:01:05,134 INFO L231 Difference]: Finished difference. Result has 64 places, 66 transitions, 406 flow [2024-06-14 14:01:05,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=310, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=406, PETRI_PLACES=64, PETRI_TRANSITIONS=66} [2024-06-14 14:01:05,137 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 21 predicate places. [2024-06-14 14:01:05,137 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 66 transitions, 406 flow [2024-06-14 14:01:05,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:05,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:01:05,137 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:01:05,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-14 14:01:05,138 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:01:05,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:01:05,138 INFO L85 PathProgramCache]: Analyzing trace with hash 571898403, now seen corresponding path program 2 times [2024-06-14 14:01:05,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:01:05,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052795148] [2024-06-14 14:01:05,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:01:05,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:01:05,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:05,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:01:05,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:05,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052795148] [2024-06-14 14:01:05,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052795148] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:05,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:05,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 14:01:05,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799301738] [2024-06-14 14:01:05,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:05,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 14:01:05,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:05,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 14:01:05,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 14:01:05,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:01:05,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 66 transitions, 406 flow. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:05,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:05,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:01:05,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:05,667 INFO L124 PetriNetUnfolderBase]: 959/1560 cut-off events. [2024-06-14 14:01:05,667 INFO L125 PetriNetUnfolderBase]: For 4457/4457 co-relation queries the response was YES. [2024-06-14 14:01:05,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5734 conditions, 1560 events. 959/1560 cut-off events. For 4457/4457 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 7791 event pairs, 355 based on Foata normal form. 2/1558 useless extension candidates. Maximal degree in co-relation 5704. Up to 1384 conditions per place. [2024-06-14 14:01:05,683 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 60 selfloop transitions, 19 changer transitions 0/86 dead transitions. [2024-06-14 14:01:05,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 86 transitions, 650 flow [2024-06-14 14:01:05,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 14:01:05,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 14:01:05,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 126 transitions. [2024-06-14 14:01:05,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-14 14:01:05,684 INFO L175 Difference]: Start difference. First operand has 64 places, 66 transitions, 406 flow. Second operand 5 states and 126 transitions. [2024-06-14 14:01:05,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 86 transitions, 650 flow [2024-06-14 14:01:05,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 86 transitions, 630 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-06-14 14:01:05,694 INFO L231 Difference]: Finished difference. Result has 68 places, 69 transitions, 454 flow [2024-06-14 14:01:05,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=388, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=454, PETRI_PLACES=68, PETRI_TRANSITIONS=69} [2024-06-14 14:01:05,696 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 25 predicate places. [2024-06-14 14:01:05,696 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 69 transitions, 454 flow [2024-06-14 14:01:05,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:05,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:01:05,697 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:01:05,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-14 14:01:05,697 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:01:05,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:01:05,698 INFO L85 PathProgramCache]: Analyzing trace with hash 334807972, now seen corresponding path program 1 times [2024-06-14 14:01:05,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:01:05,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571729437] [2024-06-14 14:01:05,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:01:05,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:01:05,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:05,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:01:05,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:05,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571729437] [2024-06-14 14:01:05,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571729437] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:05,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:05,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 14:01:05,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573523212] [2024-06-14 14:01:05,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:05,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 14:01:05,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:05,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 14:01:05,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 14:01:06,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:01:06,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 69 transitions, 454 flow. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:06,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:06,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:01:06,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:06,255 INFO L124 PetriNetUnfolderBase]: 970/1592 cut-off events. [2024-06-14 14:01:06,255 INFO L125 PetriNetUnfolderBase]: For 5493/5493 co-relation queries the response was YES. [2024-06-14 14:01:06,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6105 conditions, 1592 events. 970/1592 cut-off events. For 5493/5493 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 8013 event pairs, 349 based on Foata normal form. 2/1592 useless extension candidates. Maximal degree in co-relation 6073. Up to 1396 conditions per place. [2024-06-14 14:01:06,272 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 64 selfloop transitions, 21 changer transitions 0/92 dead transitions. [2024-06-14 14:01:06,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 92 transitions, 725 flow [2024-06-14 14:01:06,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 14:01:06,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 14:01:06,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 130 transitions. [2024-06-14 14:01:06,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-14 14:01:06,274 INFO L175 Difference]: Start difference. First operand has 68 places, 69 transitions, 454 flow. Second operand 5 states and 130 transitions. [2024-06-14 14:01:06,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 92 transitions, 725 flow [2024-06-14 14:01:06,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 92 transitions, 695 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-14 14:01:06,284 INFO L231 Difference]: Finished difference. Result has 71 places, 72 transitions, 498 flow [2024-06-14 14:01:06,284 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=427, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=498, PETRI_PLACES=71, PETRI_TRANSITIONS=72} [2024-06-14 14:01:06,285 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 28 predicate places. [2024-06-14 14:01:06,285 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 72 transitions, 498 flow [2024-06-14 14:01:06,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:06,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:01:06,285 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:01:06,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-14 14:01:06,286 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:01:06,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:01:06,286 INFO L85 PathProgramCache]: Analyzing trace with hash -457682148, now seen corresponding path program 2 times [2024-06-14 14:01:06,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:01:06,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449999772] [2024-06-14 14:01:06,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:01:06,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:01:06,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:06,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:01:06,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:06,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449999772] [2024-06-14 14:01:06,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449999772] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:06,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:06,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 14:01:06,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856745557] [2024-06-14 14:01:06,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:06,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 14:01:06,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:06,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 14:01:06,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 14:01:06,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:01:06,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 72 transitions, 498 flow. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:06,571 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:06,571 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:01:06,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:06,791 INFO L124 PetriNetUnfolderBase]: 965/1581 cut-off events. [2024-06-14 14:01:06,792 INFO L125 PetriNetUnfolderBase]: For 6612/6616 co-relation queries the response was YES. [2024-06-14 14:01:06,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6200 conditions, 1581 events. 965/1581 cut-off events. For 6612/6616 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 7974 event pairs, 360 based on Foata normal form. 6/1585 useless extension candidates. Maximal degree in co-relation 6166. Up to 1391 conditions per place. [2024-06-14 14:01:06,808 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 60 selfloop transitions, 21 changer transitions 0/88 dead transitions. [2024-06-14 14:01:06,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 88 transitions, 706 flow [2024-06-14 14:01:06,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 14:01:06,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 14:01:06,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 124 transitions. [2024-06-14 14:01:06,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5904761904761905 [2024-06-14 14:01:06,810 INFO L175 Difference]: Start difference. First operand has 71 places, 72 transitions, 498 flow. Second operand 5 states and 124 transitions. [2024-06-14 14:01:06,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 88 transitions, 706 flow [2024-06-14 14:01:06,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 88 transitions, 679 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-14 14:01:06,819 INFO L231 Difference]: Finished difference. Result has 74 places, 73 transitions, 529 flow [2024-06-14 14:01:06,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=472, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=529, PETRI_PLACES=74, PETRI_TRANSITIONS=73} [2024-06-14 14:01:06,820 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 31 predicate places. [2024-06-14 14:01:06,820 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 73 transitions, 529 flow [2024-06-14 14:01:06,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:06,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:01:06,821 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:01:06,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-14 14:01:06,821 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:01:06,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:01:06,822 INFO L85 PathProgramCache]: Analyzing trace with hash 549259432, now seen corresponding path program 1 times [2024-06-14 14:01:06,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:01:06,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795602882] [2024-06-14 14:01:06,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:01:06,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:01:06,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:07,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:01:07,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:07,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795602882] [2024-06-14 14:01:07,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795602882] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:07,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:07,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 14:01:07,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011577567] [2024-06-14 14:01:07,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:07,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 14:01:07,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:07,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 14:01:07,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-14 14:01:07,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:01:07,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 73 transitions, 529 flow. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:07,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:07,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:01:07,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:07,393 INFO L124 PetriNetUnfolderBase]: 957/1574 cut-off events. [2024-06-14 14:01:07,393 INFO L125 PetriNetUnfolderBase]: For 7572/7576 co-relation queries the response was YES. [2024-06-14 14:01:07,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6284 conditions, 1574 events. 957/1574 cut-off events. For 7572/7576 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 7921 event pairs, 329 based on Foata normal form. 8/1581 useless extension candidates. Maximal degree in co-relation 6249. Up to 1417 conditions per place. [2024-06-14 14:01:07,409 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 73 selfloop transitions, 11 changer transitions 0/91 dead transitions. [2024-06-14 14:01:07,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 91 transitions, 751 flow [2024-06-14 14:01:07,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 14:01:07,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 14:01:07,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 122 transitions. [2024-06-14 14:01:07,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.580952380952381 [2024-06-14 14:01:07,411 INFO L175 Difference]: Start difference. First operand has 74 places, 73 transitions, 529 flow. Second operand 5 states and 122 transitions. [2024-06-14 14:01:07,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 91 transitions, 751 flow [2024-06-14 14:01:07,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 91 transitions, 723 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-14 14:01:07,458 INFO L231 Difference]: Finished difference. Result has 77 places, 75 transitions, 548 flow [2024-06-14 14:01:07,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=501, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=548, PETRI_PLACES=77, PETRI_TRANSITIONS=75} [2024-06-14 14:01:07,459 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 34 predicate places. [2024-06-14 14:01:07,459 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 75 transitions, 548 flow [2024-06-14 14:01:07,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:07,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:01:07,460 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:01:07,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-14 14:01:07,460 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:01:07,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:01:07,461 INFO L85 PathProgramCache]: Analyzing trace with hash 323701376, now seen corresponding path program 1 times [2024-06-14 14:01:07,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:01:07,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71333648] [2024-06-14 14:01:07,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:01:07,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:01:07,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:07,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:01:07,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:07,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71333648] [2024-06-14 14:01:07,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71333648] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:07,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:07,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:01:07,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826059169] [2024-06-14 14:01:07,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:07,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:01:07,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:07,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:01:07,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:01:07,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:01:07,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 75 transitions, 548 flow. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:07,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:07,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:01:07,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:08,088 INFO L124 PetriNetUnfolderBase]: 1012/1666 cut-off events. [2024-06-14 14:01:08,088 INFO L125 PetriNetUnfolderBase]: For 9208/9208 co-relation queries the response was YES. [2024-06-14 14:01:08,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6823 conditions, 1666 events. 1012/1666 cut-off events. For 9208/9208 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 8490 event pairs, 273 based on Foata normal form. 4/1667 useless extension candidates. Maximal degree in co-relation 6786. Up to 1429 conditions per place. [2024-06-14 14:01:08,104 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 83 selfloop transitions, 29 changer transitions 0/119 dead transitions. [2024-06-14 14:01:08,104 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 119 transitions, 988 flow [2024-06-14 14:01:08,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:01:08,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:01:08,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-14 14:01:08,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6258503401360545 [2024-06-14 14:01:08,106 INFO L175 Difference]: Start difference. First operand has 77 places, 75 transitions, 548 flow. Second operand 7 states and 184 transitions. [2024-06-14 14:01:08,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 119 transitions, 988 flow [2024-06-14 14:01:08,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 119 transitions, 959 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-14 14:01:08,120 INFO L231 Difference]: Finished difference. Result has 82 places, 85 transitions, 669 flow [2024-06-14 14:01:08,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=519, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=669, PETRI_PLACES=82, PETRI_TRANSITIONS=85} [2024-06-14 14:01:08,121 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 39 predicate places. [2024-06-14 14:01:08,121 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 85 transitions, 669 flow [2024-06-14 14:01:08,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:08,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:01:08,122 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:01:08,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-14 14:01:08,122 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:01:08,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:01:08,123 INFO L85 PathProgramCache]: Analyzing trace with hash 323821346, now seen corresponding path program 2 times [2024-06-14 14:01:08,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:01:08,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403044698] [2024-06-14 14:01:08,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:01:08,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:01:08,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:08,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:01:08,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:08,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403044698] [2024-06-14 14:01:08,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403044698] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:08,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:08,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:01:08,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066249849] [2024-06-14 14:01:08,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:08,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:01:08,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:08,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:01:08,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:01:08,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:01:08,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 85 transitions, 669 flow. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:08,461 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:08,461 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:01:08,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:08,751 INFO L124 PetriNetUnfolderBase]: 1023/1698 cut-off events. [2024-06-14 14:01:08,752 INFO L125 PetriNetUnfolderBase]: For 11568/11568 co-relation queries the response was YES. [2024-06-14 14:01:08,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7660 conditions, 1698 events. 1023/1698 cut-off events. For 11568/11568 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 8674 event pairs, 311 based on Foata normal form. 2/1698 useless extension candidates. Maximal degree in co-relation 7621. Up to 1390 conditions per place. [2024-06-14 14:01:08,768 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 83 selfloop transitions, 32 changer transitions 0/122 dead transitions. [2024-06-14 14:01:08,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 122 transitions, 1119 flow [2024-06-14 14:01:08,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:01:08,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:01:08,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-14 14:01:08,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-06-14 14:01:08,770 INFO L175 Difference]: Start difference. First operand has 82 places, 85 transitions, 669 flow. Second operand 6 states and 153 transitions. [2024-06-14 14:01:08,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 122 transitions, 1119 flow [2024-06-14 14:01:08,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 122 transitions, 1043 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-14 14:01:08,799 INFO L231 Difference]: Finished difference. Result has 87 places, 97 transitions, 820 flow [2024-06-14 14:01:08,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=609, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=820, PETRI_PLACES=87, PETRI_TRANSITIONS=97} [2024-06-14 14:01:08,800 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 44 predicate places. [2024-06-14 14:01:08,800 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 97 transitions, 820 flow [2024-06-14 14:01:08,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:08,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:01:08,800 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:01:08,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-14 14:01:08,801 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:01:08,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:01:08,801 INFO L85 PathProgramCache]: Analyzing trace with hash -161414142, now seen corresponding path program 3 times [2024-06-14 14:01:08,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:01:08,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270380008] [2024-06-14 14:01:08,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:01:08,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:01:08,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:09,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:01:09,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:09,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270380008] [2024-06-14 14:01:09,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270380008] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:09,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:09,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:01:09,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738299222] [2024-06-14 14:01:09,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:09,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:01:09,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:09,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:01:09,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:01:09,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:01:09,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 97 transitions, 820 flow. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:09,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:09,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:01:09,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:09,367 INFO L124 PetriNetUnfolderBase]: 1018/1668 cut-off events. [2024-06-14 14:01:09,367 INFO L125 PetriNetUnfolderBase]: For 14135/14135 co-relation queries the response was YES. [2024-06-14 14:01:09,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8138 conditions, 1668 events. 1018/1668 cut-off events. For 14135/14135 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 8484 event pairs, 337 based on Foata normal form. 2/1663 useless extension candidates. Maximal degree in co-relation 8095. Up to 1387 conditions per place. [2024-06-14 14:01:09,384 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 78 selfloop transitions, 36 changer transitions 0/121 dead transitions. [2024-06-14 14:01:09,384 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 121 transitions, 1184 flow [2024-06-14 14:01:09,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:01:09,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:01:09,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-14 14:01:09,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5912698412698413 [2024-06-14 14:01:09,386 INFO L175 Difference]: Start difference. First operand has 87 places, 97 transitions, 820 flow. Second operand 6 states and 149 transitions. [2024-06-14 14:01:09,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 121 transitions, 1184 flow [2024-06-14 14:01:09,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 121 transitions, 1148 flow, removed 14 selfloop flow, removed 1 redundant places. [2024-06-14 14:01:09,406 INFO L231 Difference]: Finished difference. Result has 92 places, 100 transitions, 902 flow [2024-06-14 14:01:09,406 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=786, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=902, PETRI_PLACES=92, PETRI_TRANSITIONS=100} [2024-06-14 14:01:09,407 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 49 predicate places. [2024-06-14 14:01:09,407 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 100 transitions, 902 flow [2024-06-14 14:01:09,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:09,408 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:01:09,409 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:01:09,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-14 14:01:09,409 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:01:09,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:01:09,409 INFO L85 PathProgramCache]: Analyzing trace with hash 1188365619, now seen corresponding path program 1 times [2024-06-14 14:01:09,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:01:09,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245741932] [2024-06-14 14:01:09,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:01:09,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:01:09,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:09,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:01:09,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:09,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245741932] [2024-06-14 14:01:09,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245741932] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:09,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:09,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:01:09,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664282529] [2024-06-14 14:01:09,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:09,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:01:09,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:09,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:01:09,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:01:09,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-14 14:01:09,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 100 transitions, 902 flow. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:09,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:09,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-14 14:01:09,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:10,039 INFO L124 PetriNetUnfolderBase]: 923/1562 cut-off events. [2024-06-14 14:01:10,040 INFO L125 PetriNetUnfolderBase]: For 15403/15408 co-relation queries the response was YES. [2024-06-14 14:01:10,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7913 conditions, 1562 events. 923/1562 cut-off events. For 15403/15408 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 8096 event pairs, 312 based on Foata normal form. 8/1566 useless extension candidates. Maximal degree in co-relation 7868. Up to 1345 conditions per place. [2024-06-14 14:01:10,057 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 77 selfloop transitions, 18 changer transitions 0/109 dead transitions. [2024-06-14 14:01:10,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 109 transitions, 1127 flow [2024-06-14 14:01:10,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 14:01:10,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 14:01:10,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 103 transitions. [2024-06-14 14:01:10,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6130952380952381 [2024-06-14 14:01:10,059 INFO L175 Difference]: Start difference. First operand has 92 places, 100 transitions, 902 flow. Second operand 4 states and 103 transitions. [2024-06-14 14:01:10,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 109 transitions, 1127 flow [2024-06-14 14:01:10,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 109 transitions, 1061 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-14 14:01:10,080 INFO L231 Difference]: Finished difference. Result has 93 places, 100 transitions, 882 flow [2024-06-14 14:01:10,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=837, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=882, PETRI_PLACES=93, PETRI_TRANSITIONS=100} [2024-06-14 14:01:10,081 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 50 predicate places. [2024-06-14 14:01:10,082 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 100 transitions, 882 flow [2024-06-14 14:01:10,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:10,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:01:10,082 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:01:10,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-14 14:01:10,082 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:01:10,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:01:10,083 INFO L85 PathProgramCache]: Analyzing trace with hash 1258647021, now seen corresponding path program 1 times [2024-06-14 14:01:10,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:01:10,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238832483] [2024-06-14 14:01:10,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:01:10,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:01:10,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:10,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:01:10,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:10,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238832483] [2024-06-14 14:01:10,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238832483] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:10,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:10,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:01:10,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695891926] [2024-06-14 14:01:10,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:10,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:01:10,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:10,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:01:10,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:01:10,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:01:10,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 100 transitions, 882 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:10,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:10,422 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:01:10,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:10,736 INFO L124 PetriNetUnfolderBase]: 982/1633 cut-off events. [2024-06-14 14:01:10,737 INFO L125 PetriNetUnfolderBase]: For 16651/16651 co-relation queries the response was YES. [2024-06-14 14:01:10,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8167 conditions, 1633 events. 982/1633 cut-off events. For 16651/16651 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 8315 event pairs, 302 based on Foata normal form. 4/1634 useless extension candidates. Maximal degree in co-relation 8120. Up to 1396 conditions per place. [2024-06-14 14:01:10,754 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 89 selfloop transitions, 35 changer transitions 0/131 dead transitions. [2024-06-14 14:01:10,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 131 transitions, 1224 flow [2024-06-14 14:01:10,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:01:10,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:01:10,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-14 14:01:10,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6156462585034014 [2024-06-14 14:01:10,756 INFO L175 Difference]: Start difference. First operand has 93 places, 100 transitions, 882 flow. Second operand 7 states and 181 transitions. [2024-06-14 14:01:10,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 131 transitions, 1224 flow [2024-06-14 14:01:10,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 131 transitions, 1172 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-14 14:01:10,783 INFO L231 Difference]: Finished difference. Result has 97 places, 100 transitions, 913 flow [2024-06-14 14:01:10,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=830, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=913, PETRI_PLACES=97, PETRI_TRANSITIONS=100} [2024-06-14 14:01:10,785 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 54 predicate places. [2024-06-14 14:01:10,785 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 100 transitions, 913 flow [2024-06-14 14:01:10,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:10,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:01:10,785 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:01:10,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-14 14:01:10,786 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:01:10,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:01:10,786 INFO L85 PathProgramCache]: Analyzing trace with hash 1592418957, now seen corresponding path program 2 times [2024-06-14 14:01:10,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:01:10,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958903152] [2024-06-14 14:01:10,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:01:10,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:01:10,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:11,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:01:11,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:11,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958903152] [2024-06-14 14:01:11,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958903152] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:11,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:11,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:01:11,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817074982] [2024-06-14 14:01:11,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:11,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:01:11,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:11,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:01:11,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:01:11,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:01:11,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 100 transitions, 913 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:11,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:11,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:01:11,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:11,434 INFO L124 PetriNetUnfolderBase]: 993/1656 cut-off events. [2024-06-14 14:01:11,435 INFO L125 PetriNetUnfolderBase]: For 18270/18270 co-relation queries the response was YES. [2024-06-14 14:01:11,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8456 conditions, 1656 events. 993/1656 cut-off events. For 18270/18270 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 8420 event pairs, 306 based on Foata normal form. 2/1656 useless extension candidates. Maximal degree in co-relation 8409. Up to 1347 conditions per place. [2024-06-14 14:01:11,450 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 87 selfloop transitions, 37 changer transitions 0/131 dead transitions. [2024-06-14 14:01:11,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 131 transitions, 1323 flow [2024-06-14 14:01:11,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:01:11,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:01:11,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-14 14:01:11,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5918367346938775 [2024-06-14 14:01:11,452 INFO L175 Difference]: Start difference. First operand has 97 places, 100 transitions, 913 flow. Second operand 7 states and 174 transitions. [2024-06-14 14:01:11,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 131 transitions, 1323 flow [2024-06-14 14:01:11,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 131 transitions, 1253 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-14 14:01:11,479 INFO L231 Difference]: Finished difference. Result has 98 places, 103 transitions, 959 flow [2024-06-14 14:01:11,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=843, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=959, PETRI_PLACES=98, PETRI_TRANSITIONS=103} [2024-06-14 14:01:11,481 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 55 predicate places. [2024-06-14 14:01:11,482 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 103 transitions, 959 flow [2024-06-14 14:01:11,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:11,482 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:01:11,482 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:01:11,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-14 14:01:11,482 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:01:11,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:01:11,483 INFO L85 PathProgramCache]: Analyzing trace with hash 1454963851, now seen corresponding path program 3 times [2024-06-14 14:01:11,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:01:11,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414645510] [2024-06-14 14:01:11,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:01:11,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:01:11,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:11,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:01:11,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:11,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414645510] [2024-06-14 14:01:11,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414645510] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:11,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:11,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:01:11,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97408490] [2024-06-14 14:01:11,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:11,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:01:11,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:11,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:01:11,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:01:11,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:01:11,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 103 transitions, 959 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:11,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:11,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:01:11,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:12,053 INFO L124 PetriNetUnfolderBase]: 1020/1705 cut-off events. [2024-06-14 14:01:12,054 INFO L125 PetriNetUnfolderBase]: For 20837/20837 co-relation queries the response was YES. [2024-06-14 14:01:12,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8885 conditions, 1705 events. 1020/1705 cut-off events. For 20837/20837 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 8759 event pairs, 306 based on Foata normal form. 2/1705 useless extension candidates. Maximal degree in co-relation 8837. Up to 1376 conditions per place. [2024-06-14 14:01:12,072 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 85 selfloop transitions, 43 changer transitions 0/135 dead transitions. [2024-06-14 14:01:12,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 135 transitions, 1483 flow [2024-06-14 14:01:12,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:01:12,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:01:12,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-14 14:01:12,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6150793650793651 [2024-06-14 14:01:12,074 INFO L175 Difference]: Start difference. First operand has 98 places, 103 transitions, 959 flow. Second operand 6 states and 155 transitions. [2024-06-14 14:01:12,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 135 transitions, 1483 flow [2024-06-14 14:01:12,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 135 transitions, 1381 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-14 14:01:12,105 INFO L231 Difference]: Finished difference. Result has 99 places, 109 transitions, 1031 flow [2024-06-14 14:01:12,106 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=869, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1031, PETRI_PLACES=99, PETRI_TRANSITIONS=109} [2024-06-14 14:01:12,106 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 56 predicate places. [2024-06-14 14:01:12,106 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 109 transitions, 1031 flow [2024-06-14 14:01:12,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:12,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:01:12,107 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:01:12,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-14 14:01:12,107 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:01:12,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:01:12,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1592634283, now seen corresponding path program 1 times [2024-06-14 14:01:12,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:01:12,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235461973] [2024-06-14 14:01:12,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:01:12,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:01:12,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:12,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:01:12,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:12,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235461973] [2024-06-14 14:01:12,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235461973] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:12,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:12,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:01:12,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700366400] [2024-06-14 14:01:12,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:12,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:01:12,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:12,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:01:12,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:01:12,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:01:12,418 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 109 transitions, 1031 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:12,418 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:12,418 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:01:12,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:12,720 INFO L124 PetriNetUnfolderBase]: 1037/1730 cut-off events. [2024-06-14 14:01:12,721 INFO L125 PetriNetUnfolderBase]: For 23067/23067 co-relation queries the response was YES. [2024-06-14 14:01:12,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9090 conditions, 1730 events. 1037/1730 cut-off events. For 23067/23067 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 8883 event pairs, 302 based on Foata normal form. 4/1732 useless extension candidates. Maximal degree in co-relation 9041. Up to 1476 conditions per place. [2024-06-14 14:01:12,738 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 103 selfloop transitions, 24 changer transitions 0/134 dead transitions. [2024-06-14 14:01:12,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 134 transitions, 1363 flow [2024-06-14 14:01:12,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:01:12,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:01:12,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-14 14:01:12,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5912698412698413 [2024-06-14 14:01:12,741 INFO L175 Difference]: Start difference. First operand has 99 places, 109 transitions, 1031 flow. Second operand 6 states and 149 transitions. [2024-06-14 14:01:12,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 134 transitions, 1363 flow [2024-06-14 14:01:12,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 134 transitions, 1299 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-14 14:01:12,772 INFO L231 Difference]: Finished difference. Result has 103 places, 111 transitions, 1046 flow [2024-06-14 14:01:12,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=967, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1046, PETRI_PLACES=103, PETRI_TRANSITIONS=111} [2024-06-14 14:01:12,773 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 60 predicate places. [2024-06-14 14:01:12,773 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 111 transitions, 1046 flow [2024-06-14 14:01:12,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:12,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:01:12,773 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:01:12,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-14 14:01:12,774 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:01:12,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:01:12,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1745845573, now seen corresponding path program 4 times [2024-06-14 14:01:12,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:01:12,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695586199] [2024-06-14 14:01:12,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:01:12,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:01:12,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:13,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:01:13,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:13,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695586199] [2024-06-14 14:01:13,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695586199] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:13,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:13,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:01:13,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610751396] [2024-06-14 14:01:13,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:13,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:01:13,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:13,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:01:13,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:01:13,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:01:13,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 111 transitions, 1046 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:13,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:13,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:01:13,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:13,344 INFO L124 PetriNetUnfolderBase]: 1032/1714 cut-off events. [2024-06-14 14:01:13,344 INFO L125 PetriNetUnfolderBase]: For 25204/25208 co-relation queries the response was YES. [2024-06-14 14:01:13,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9180 conditions, 1714 events. 1032/1714 cut-off events. For 25204/25208 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 8867 event pairs, 334 based on Foata normal form. 6/1717 useless extension candidates. Maximal degree in co-relation 9130. Up to 1398 conditions per place. [2024-06-14 14:01:13,362 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 83 selfloop transitions, 43 changer transitions 0/133 dead transitions. [2024-06-14 14:01:13,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 133 transitions, 1433 flow [2024-06-14 14:01:13,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:01:13,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:01:13,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-14 14:01:13,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5912698412698413 [2024-06-14 14:01:13,365 INFO L175 Difference]: Start difference. First operand has 103 places, 111 transitions, 1046 flow. Second operand 6 states and 149 transitions. [2024-06-14 14:01:13,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 133 transitions, 1433 flow [2024-06-14 14:01:13,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 133 transitions, 1368 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-14 14:01:13,397 INFO L231 Difference]: Finished difference. Result has 105 places, 112 transitions, 1088 flow [2024-06-14 14:01:13,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=983, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1088, PETRI_PLACES=105, PETRI_TRANSITIONS=112} [2024-06-14 14:01:13,398 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 62 predicate places. [2024-06-14 14:01:13,398 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 112 transitions, 1088 flow [2024-06-14 14:01:13,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:13,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:01:13,399 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:01:13,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-14 14:01:13,399 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:01:13,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:01:13,400 INFO L85 PathProgramCache]: Analyzing trace with hash -711248397, now seen corresponding path program 5 times [2024-06-14 14:01:13,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:01:13,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21722742] [2024-06-14 14:01:13,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:01:13,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:01:13,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:13,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:01:13,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:13,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21722742] [2024-06-14 14:01:13,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21722742] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:13,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:13,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:01:13,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965633809] [2024-06-14 14:01:13,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:13,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:01:13,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:13,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:01:13,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:01:13,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:01:13,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 112 transitions, 1088 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:13,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:13,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:01:13,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:14,025 INFO L124 PetriNetUnfolderBase]: 1027/1692 cut-off events. [2024-06-14 14:01:14,026 INFO L125 PetriNetUnfolderBase]: For 26983/26983 co-relation queries the response was YES. [2024-06-14 14:01:14,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9243 conditions, 1692 events. 1027/1692 cut-off events. For 26983/26983 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 8631 event pairs, 338 based on Foata normal form. 2/1687 useless extension candidates. Maximal degree in co-relation 9192. Up to 1393 conditions per place. [2024-06-14 14:01:14,042 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 82 selfloop transitions, 46 changer transitions 0/135 dead transitions. [2024-06-14 14:01:14,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 135 transitions, 1402 flow [2024-06-14 14:01:14,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:01:14,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:01:14,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-14 14:01:14,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-14 14:01:14,044 INFO L175 Difference]: Start difference. First operand has 105 places, 112 transitions, 1088 flow. Second operand 7 states and 168 transitions. [2024-06-14 14:01:14,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 135 transitions, 1402 flow [2024-06-14 14:01:14,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 135 transitions, 1324 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-14 14:01:14,080 INFO L231 Difference]: Finished difference. Result has 109 places, 112 transitions, 1110 flow [2024-06-14 14:01:14,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1010, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1110, PETRI_PLACES=109, PETRI_TRANSITIONS=112} [2024-06-14 14:01:14,080 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 66 predicate places. [2024-06-14 14:01:14,081 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 112 transitions, 1110 flow [2024-06-14 14:01:14,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:14,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:01:14,081 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:01:14,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-14 14:01:14,082 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:01:14,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:01:14,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1314596383, now seen corresponding path program 2 times [2024-06-14 14:01:14,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:01:14,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023809954] [2024-06-14 14:01:14,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:01:14,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:01:14,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:14,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:01:14,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:14,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023809954] [2024-06-14 14:01:14,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023809954] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:14,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:14,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:01:14,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458513622] [2024-06-14 14:01:14,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:14,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:01:14,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:14,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:01:14,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:01:14,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:01:14,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 112 transitions, 1110 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:14,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:14,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:01:14,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:14,659 INFO L124 PetriNetUnfolderBase]: 1044/1749 cut-off events. [2024-06-14 14:01:14,659 INFO L125 PetriNetUnfolderBase]: For 30022/30026 co-relation queries the response was YES. [2024-06-14 14:01:14,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9514 conditions, 1749 events. 1044/1749 cut-off events. For 30022/30026 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 9131 event pairs, 320 based on Foata normal form. 8/1755 useless extension candidates. Maximal degree in co-relation 9461. Up to 1489 conditions per place. [2024-06-14 14:01:14,676 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 104 selfloop transitions, 23 changer transitions 0/134 dead transitions. [2024-06-14 14:01:14,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 134 transitions, 1438 flow [2024-06-14 14:01:14,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:01:14,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:01:14,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-14 14:01:14,678 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5753968253968254 [2024-06-14 14:01:14,678 INFO L175 Difference]: Start difference. First operand has 109 places, 112 transitions, 1110 flow. Second operand 6 states and 145 transitions. [2024-06-14 14:01:14,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 134 transitions, 1438 flow [2024-06-14 14:01:14,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 134 transitions, 1336 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-14 14:01:14,719 INFO L231 Difference]: Finished difference. Result has 110 places, 114 transitions, 1089 flow [2024-06-14 14:01:14,719 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1008, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1089, PETRI_PLACES=110, PETRI_TRANSITIONS=114} [2024-06-14 14:01:14,719 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 67 predicate places. [2024-06-14 14:01:14,720 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 114 transitions, 1089 flow [2024-06-14 14:01:14,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:14,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:01:14,720 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:01:14,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-14 14:01:14,720 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:01:14,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:01:14,721 INFO L85 PathProgramCache]: Analyzing trace with hash -442630777, now seen corresponding path program 3 times [2024-06-14 14:01:14,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:01:14,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072660609] [2024-06-14 14:01:14,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:01:14,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:01:14,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:14,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:01:14,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:14,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072660609] [2024-06-14 14:01:14,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072660609] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:14,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:14,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:01:14,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103764562] [2024-06-14 14:01:14,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:14,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:01:14,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:14,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:01:14,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:01:14,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:01:14,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 114 transitions, 1089 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:14,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:14,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:01:14,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:15,274 INFO L124 PetriNetUnfolderBase]: 1036/1737 cut-off events. [2024-06-14 14:01:15,275 INFO L125 PetriNetUnfolderBase]: For 31482/31486 co-relation queries the response was YES. [2024-06-14 14:01:15,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9514 conditions, 1737 events. 1036/1737 cut-off events. For 31482/31486 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 9065 event pairs, 289 based on Foata normal form. 8/1743 useless extension candidates. Maximal degree in co-relation 9460. Up to 1418 conditions per place. [2024-06-14 14:01:15,292 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 102 selfloop transitions, 28 changer transitions 0/137 dead transitions. [2024-06-14 14:01:15,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 137 transitions, 1429 flow [2024-06-14 14:01:15,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:01:15,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:01:15,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-14 14:01:15,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5793650793650794 [2024-06-14 14:01:15,294 INFO L175 Difference]: Start difference. First operand has 110 places, 114 transitions, 1089 flow. Second operand 6 states and 146 transitions. [2024-06-14 14:01:15,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 137 transitions, 1429 flow [2024-06-14 14:01:15,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 137 transitions, 1366 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-14 14:01:15,331 INFO L231 Difference]: Finished difference. Result has 112 places, 116 transitions, 1121 flow [2024-06-14 14:01:15,332 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1026, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1121, PETRI_PLACES=112, PETRI_TRANSITIONS=116} [2024-06-14 14:01:15,332 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 69 predicate places. [2024-06-14 14:01:15,332 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 116 transitions, 1121 flow [2024-06-14 14:01:15,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:15,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:01:15,333 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:01:15,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-14 14:01:15,333 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:01:15,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:01:15,334 INFO L85 PathProgramCache]: Analyzing trace with hash -1432334471, now seen corresponding path program 1 times [2024-06-14 14:01:15,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:01:15,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992846711] [2024-06-14 14:01:15,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:01:15,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:01:15,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:15,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:01:15,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:15,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992846711] [2024-06-14 14:01:15,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992846711] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:15,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:15,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:01:15,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011957246] [2024-06-14 14:01:15,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:15,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:01:15,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:15,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:01:15,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:01:15,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:01:15,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 116 transitions, 1121 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:15,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:15,672 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:01:15,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:15,940 INFO L124 PetriNetUnfolderBase]: 1041/1745 cut-off events. [2024-06-14 14:01:15,941 INFO L125 PetriNetUnfolderBase]: For 32861/32861 co-relation queries the response was YES. [2024-06-14 14:01:15,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9758 conditions, 1745 events. 1041/1745 cut-off events. For 32861/32861 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 8999 event pairs, 302 based on Foata normal form. 1/1744 useless extension candidates. Maximal degree in co-relation 9703. Up to 1555 conditions per place. [2024-06-14 14:01:15,957 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 111 selfloop transitions, 13 changer transitions 0/131 dead transitions. [2024-06-14 14:01:15,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 131 transitions, 1433 flow [2024-06-14 14:01:15,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 14:01:15,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 14:01:15,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-06-14 14:01:15,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5619047619047619 [2024-06-14 14:01:15,961 INFO L175 Difference]: Start difference. First operand has 112 places, 116 transitions, 1121 flow. Second operand 5 states and 118 transitions. [2024-06-14 14:01:15,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 131 transitions, 1433 flow [2024-06-14 14:01:16,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 131 transitions, 1356 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-14 14:01:16,007 INFO L231 Difference]: Finished difference. Result has 113 places, 119 transitions, 1116 flow [2024-06-14 14:01:16,007 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1044, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1116, PETRI_PLACES=113, PETRI_TRANSITIONS=119} [2024-06-14 14:01:16,008 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 70 predicate places. [2024-06-14 14:01:16,008 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 119 transitions, 1116 flow [2024-06-14 14:01:16,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:16,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:01:16,009 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:01:16,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-14 14:01:16,010 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:01:16,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:01:16,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1815378261, now seen corresponding path program 2 times [2024-06-14 14:01:16,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:01:16,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923006516] [2024-06-14 14:01:16,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:01:16,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:01:16,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:16,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:01:16,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:16,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923006516] [2024-06-14 14:01:16,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923006516] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:16,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:16,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:01:16,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400767187] [2024-06-14 14:01:16,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:16,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:01:16,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:16,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:01:16,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:01:16,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:01:16,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 119 transitions, 1116 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:16,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:16,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:01:16,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:16,651 INFO L124 PetriNetUnfolderBase]: 1046/1747 cut-off events. [2024-06-14 14:01:16,652 INFO L125 PetriNetUnfolderBase]: For 34245/34245 co-relation queries the response was YES. [2024-06-14 14:01:16,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9942 conditions, 1747 events. 1046/1747 cut-off events. For 34245/34245 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 9000 event pairs, 299 based on Foata normal form. 1/1747 useless extension candidates. Maximal degree in co-relation 9886. Up to 1555 conditions per place. [2024-06-14 14:01:16,667 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 116 selfloop transitions, 18 changer transitions 0/141 dead transitions. [2024-06-14 14:01:16,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 141 transitions, 1544 flow [2024-06-14 14:01:16,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 14:01:16,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 14:01:16,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 124 transitions. [2024-06-14 14:01:16,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5904761904761905 [2024-06-14 14:01:16,669 INFO L175 Difference]: Start difference. First operand has 113 places, 119 transitions, 1116 flow. Second operand 5 states and 124 transitions. [2024-06-14 14:01:16,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 141 transitions, 1544 flow [2024-06-14 14:01:16,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 141 transitions, 1494 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-14 14:01:16,715 INFO L231 Difference]: Finished difference. Result has 116 places, 125 transitions, 1202 flow [2024-06-14 14:01:16,715 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1066, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1202, PETRI_PLACES=116, PETRI_TRANSITIONS=125} [2024-06-14 14:01:16,716 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 73 predicate places. [2024-06-14 14:01:16,716 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 125 transitions, 1202 flow [2024-06-14 14:01:16,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:16,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:01:16,717 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:01:16,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-14 14:01:16,717 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:01:16,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:01:16,718 INFO L85 PathProgramCache]: Analyzing trace with hash 1836556511, now seen corresponding path program 1 times [2024-06-14 14:01:16,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:01:16,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565238622] [2024-06-14 14:01:16,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:01:16,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:01:16,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:16,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:01:16,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:16,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565238622] [2024-06-14 14:01:16,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565238622] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:16,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:16,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:01:16,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525418777] [2024-06-14 14:01:16,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:16,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:01:16,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:16,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:01:16,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:01:17,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:01:17,011 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 125 transitions, 1202 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:17,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:17,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:01:17,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:17,453 INFO L124 PetriNetUnfolderBase]: 1450/2395 cut-off events. [2024-06-14 14:01:17,454 INFO L125 PetriNetUnfolderBase]: For 63815/63815 co-relation queries the response was YES. [2024-06-14 14:01:17,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14707 conditions, 2395 events. 1450/2395 cut-off events. For 63815/63815 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 13073 event pairs, 330 based on Foata normal form. 14/2406 useless extension candidates. Maximal degree in co-relation 14649. Up to 1444 conditions per place. [2024-06-14 14:01:17,479 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 132 selfloop transitions, 40 changer transitions 0/179 dead transitions. [2024-06-14 14:01:17,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 179 transitions, 1900 flow [2024-06-14 14:01:17,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:01:17,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:01:17,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 214 transitions. [2024-06-14 14:01:17,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6369047619047619 [2024-06-14 14:01:17,481 INFO L175 Difference]: Start difference. First operand has 116 places, 125 transitions, 1202 flow. Second operand 8 states and 214 transitions. [2024-06-14 14:01:17,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 179 transitions, 1900 flow [2024-06-14 14:01:17,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 179 transitions, 1854 flow, removed 20 selfloop flow, removed 1 redundant places. [2024-06-14 14:01:17,578 INFO L231 Difference]: Finished difference. Result has 124 places, 132 transitions, 1366 flow [2024-06-14 14:01:17,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1156, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1366, PETRI_PLACES=124, PETRI_TRANSITIONS=132} [2024-06-14 14:01:17,578 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 81 predicate places. [2024-06-14 14:01:17,579 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 132 transitions, 1366 flow [2024-06-14 14:01:17,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:17,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:01:17,579 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:01:17,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-14 14:01:17,580 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:01:17,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:01:17,580 INFO L85 PathProgramCache]: Analyzing trace with hash 1866843391, now seen corresponding path program 2 times [2024-06-14 14:01:17,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:01:17,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571972010] [2024-06-14 14:01:17,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:01:17,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:01:17,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:17,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:01:17,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:17,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571972010] [2024-06-14 14:01:17,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571972010] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:17,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:17,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:01:17,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975071474] [2024-06-14 14:01:17,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:17,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:01:17,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:17,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:01:17,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:01:17,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:01:17,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 132 transitions, 1366 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:17,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:17,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:01:17,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:18,333 INFO L124 PetriNetUnfolderBase]: 1419/2350 cut-off events. [2024-06-14 14:01:18,333 INFO L125 PetriNetUnfolderBase]: For 65353/65353 co-relation queries the response was YES. [2024-06-14 14:01:18,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14837 conditions, 2350 events. 1419/2350 cut-off events. For 65353/65353 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 12803 event pairs, 419 based on Foata normal form. 14/2361 useless extension candidates. Maximal degree in co-relation 14776. Up to 2032 conditions per place. [2024-06-14 14:01:18,360 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 128 selfloop transitions, 38 changer transitions 0/173 dead transitions. [2024-06-14 14:01:18,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 173 transitions, 1872 flow [2024-06-14 14:01:18,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:01:18,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:01:18,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-14 14:01:18,362 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6130952380952381 [2024-06-14 14:01:18,362 INFO L175 Difference]: Start difference. First operand has 124 places, 132 transitions, 1366 flow. Second operand 8 states and 206 transitions. [2024-06-14 14:01:18,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 173 transitions, 1872 flow [2024-06-14 14:01:18,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 173 transitions, 1776 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-14 14:01:18,457 INFO L231 Difference]: Finished difference. Result has 128 places, 135 transitions, 1422 flow [2024-06-14 14:01:18,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1276, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1422, PETRI_PLACES=128, PETRI_TRANSITIONS=135} [2024-06-14 14:01:18,458 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 85 predicate places. [2024-06-14 14:01:18,458 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 135 transitions, 1422 flow [2024-06-14 14:01:18,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:18,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:01:18,459 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:01:18,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-14 14:01:18,459 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:01:18,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:01:18,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1982134561, now seen corresponding path program 3 times [2024-06-14 14:01:18,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:01:18,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413511185] [2024-06-14 14:01:18,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:01:18,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:01:18,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:18,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:01:18,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:18,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413511185] [2024-06-14 14:01:18,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413511185] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:18,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:18,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:01:18,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419257964] [2024-06-14 14:01:18,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:18,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:01:18,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:18,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:01:18,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:01:18,753 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:01:18,754 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 135 transitions, 1422 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:18,754 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:18,754 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:01:18,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:19,184 INFO L124 PetriNetUnfolderBase]: 1436/2379 cut-off events. [2024-06-14 14:01:19,185 INFO L125 PetriNetUnfolderBase]: For 67704/67704 co-relation queries the response was YES. [2024-06-14 14:01:19,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15110 conditions, 2379 events. 1436/2379 cut-off events. For 67704/67704 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 12957 event pairs, 423 based on Foata normal form. 4/2381 useless extension candidates. Maximal degree in co-relation 15047. Up to 2026 conditions per place. [2024-06-14 14:01:19,208 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 111 selfloop transitions, 46 changer transitions 0/164 dead transitions. [2024-06-14 14:01:19,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 164 transitions, 1848 flow [2024-06-14 14:01:19,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:01:19,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:01:19,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-14 14:01:19,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5850340136054422 [2024-06-14 14:01:19,213 INFO L175 Difference]: Start difference. First operand has 128 places, 135 transitions, 1422 flow. Second operand 7 states and 172 transitions. [2024-06-14 14:01:19,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 164 transitions, 1848 flow [2024-06-14 14:01:19,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 164 transitions, 1740 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-14 14:01:19,309 INFO L231 Difference]: Finished difference. Result has 129 places, 137 transitions, 1461 flow [2024-06-14 14:01:19,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1314, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1461, PETRI_PLACES=129, PETRI_TRANSITIONS=137} [2024-06-14 14:01:19,309 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 86 predicate places. [2024-06-14 14:01:19,309 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 137 transitions, 1461 flow [2024-06-14 14:01:19,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:19,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:01:19,310 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:01:19,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-14 14:01:19,310 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:01:19,311 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:01:19,311 INFO L85 PathProgramCache]: Analyzing trace with hash -573867463, now seen corresponding path program 4 times [2024-06-14 14:01:19,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:01:19,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196231499] [2024-06-14 14:01:19,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:01:19,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:01:19,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:19,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:01:19,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:19,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196231499] [2024-06-14 14:01:19,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196231499] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:19,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:19,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:01:19,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57073205] [2024-06-14 14:01:19,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:19,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:01:19,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:19,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:01:19,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:01:19,603 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:01:19,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 137 transitions, 1461 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:19,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:19,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:01:19,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:19,985 INFO L124 PetriNetUnfolderBase]: 1428/2340 cut-off events. [2024-06-14 14:01:19,985 INFO L125 PetriNetUnfolderBase]: For 70573/70573 co-relation queries the response was YES. [2024-06-14 14:01:20,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14885 conditions, 2340 events. 1428/2340 cut-off events. For 70573/70573 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 12705 event pairs, 459 based on Foata normal form. 4/2336 useless extension candidates. Maximal degree in co-relation 14821. Up to 2014 conditions per place. [2024-06-14 14:01:20,011 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 108 selfloop transitions, 48 changer transitions 0/163 dead transitions. [2024-06-14 14:01:20,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 163 transitions, 1881 flow [2024-06-14 14:01:20,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:01:20,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:01:20,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-14 14:01:20,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-14 14:01:20,013 INFO L175 Difference]: Start difference. First operand has 129 places, 137 transitions, 1461 flow. Second operand 7 states and 168 transitions. [2024-06-14 14:01:20,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 163 transitions, 1881 flow [2024-06-14 14:01:20,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 163 transitions, 1752 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-14 14:01:20,123 INFO L231 Difference]: Finished difference. Result has 131 places, 139 transitions, 1487 flow [2024-06-14 14:01:20,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1332, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1487, PETRI_PLACES=131, PETRI_TRANSITIONS=139} [2024-06-14 14:01:20,124 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 88 predicate places. [2024-06-14 14:01:20,124 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 139 transitions, 1487 flow [2024-06-14 14:01:20,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:20,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:01:20,125 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:01:20,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-14 14:01:20,125 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:01:20,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:01:20,126 INFO L85 PathProgramCache]: Analyzing trace with hash 1474138796, now seen corresponding path program 1 times [2024-06-14 14:01:20,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:01:20,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228333423] [2024-06-14 14:01:20,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:01:20,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:01:20,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:20,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:01:20,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:20,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228333423] [2024-06-14 14:01:20,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228333423] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:20,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:20,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:01:20,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551365697] [2024-06-14 14:01:20,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:20,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:01:20,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:20,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:01:20,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:01:20,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:01:20,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 139 transitions, 1487 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:20,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:20,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:01:20,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:20,861 INFO L124 PetriNetUnfolderBase]: 1433/2377 cut-off events. [2024-06-14 14:01:20,861 INFO L125 PetriNetUnfolderBase]: For 73456/73460 co-relation queries the response was YES. [2024-06-14 14:01:20,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15091 conditions, 2377 events. 1433/2377 cut-off events. For 73456/73460 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 13022 event pairs, 416 based on Foata normal form. 5/2381 useless extension candidates. Maximal degree in co-relation 15026. Up to 2179 conditions per place. [2024-06-14 14:01:20,888 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 135 selfloop transitions, 12 changer transitions 0/154 dead transitions. [2024-06-14 14:01:20,889 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 154 transitions, 1853 flow [2024-06-14 14:01:20,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 14:01:20,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 14:01:20,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-06-14 14:01:20,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5619047619047619 [2024-06-14 14:01:20,890 INFO L175 Difference]: Start difference. First operand has 131 places, 139 transitions, 1487 flow. Second operand 5 states and 118 transitions. [2024-06-14 14:01:20,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 154 transitions, 1853 flow [2024-06-14 14:01:20,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 154 transitions, 1716 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-14 14:01:20,992 INFO L231 Difference]: Finished difference. Result has 131 places, 142 transitions, 1428 flow [2024-06-14 14:01:20,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1350, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1428, PETRI_PLACES=131, PETRI_TRANSITIONS=142} [2024-06-14 14:01:20,993 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 88 predicate places. [2024-06-14 14:01:20,993 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 142 transitions, 1428 flow [2024-06-14 14:01:20,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:20,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:01:20,994 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:01:20,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-14 14:01:20,994 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:01:20,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:01:20,995 INFO L85 PathProgramCache]: Analyzing trace with hash -1452694708, now seen corresponding path program 2 times [2024-06-14 14:01:20,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:01:20,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651002733] [2024-06-14 14:01:20,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:01:20,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:01:21,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:21,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:01:21,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:21,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651002733] [2024-06-14 14:01:21,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651002733] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:21,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:21,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:01:21,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867748781] [2024-06-14 14:01:21,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:21,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:01:21,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:21,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:01:21,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:01:21,396 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:01:21,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 142 transitions, 1428 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:21,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:21,397 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:01:21,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:21,784 INFO L124 PetriNetUnfolderBase]: 1430/2369 cut-off events. [2024-06-14 14:01:21,785 INFO L125 PetriNetUnfolderBase]: For 75744/75744 co-relation queries the response was YES. [2024-06-14 14:01:21,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15104 conditions, 2369 events. 1430/2369 cut-off events. For 75744/75744 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 12974 event pairs, 416 based on Foata normal form. 1/2368 useless extension candidates. Maximal degree in co-relation 15038. Up to 2172 conditions per place. [2024-06-14 14:01:21,809 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 135 selfloop transitions, 16 changer transitions 0/158 dead transitions. [2024-06-14 14:01:21,810 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 158 transitions, 1810 flow [2024-06-14 14:01:21,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:01:21,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:01:21,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 136 transitions. [2024-06-14 14:01:21,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5396825396825397 [2024-06-14 14:01:21,811 INFO L175 Difference]: Start difference. First operand has 131 places, 142 transitions, 1428 flow. Second operand 6 states and 136 transitions. [2024-06-14 14:01:21,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 158 transitions, 1810 flow [2024-06-14 14:01:21,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 158 transitions, 1754 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-14 14:01:21,916 INFO L231 Difference]: Finished difference. Result has 134 places, 145 transitions, 1464 flow [2024-06-14 14:01:21,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1372, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1464, PETRI_PLACES=134, PETRI_TRANSITIONS=145} [2024-06-14 14:01:21,917 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 91 predicate places. [2024-06-14 14:01:21,917 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 145 transitions, 1464 flow [2024-06-14 14:01:21,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:21,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:01:21,918 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:01:21,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-14 14:01:21,918 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:01:21,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:01:21,918 INFO L85 PathProgramCache]: Analyzing trace with hash 513206102, now seen corresponding path program 1 times [2024-06-14 14:01:21,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:01:21,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364410407] [2024-06-14 14:01:21,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:01:21,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:01:21,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:22,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:01:22,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:22,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364410407] [2024-06-14 14:01:22,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364410407] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:22,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:22,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:01:22,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587381564] [2024-06-14 14:01:22,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:22,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:01:22,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:22,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:01:22,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:01:22,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:01:22,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 145 transitions, 1464 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:22,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:22,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:01:22,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:22,670 INFO L124 PetriNetUnfolderBase]: 1458/2421 cut-off events. [2024-06-14 14:01:22,671 INFO L125 PetriNetUnfolderBase]: For 83571/83571 co-relation queries the response was YES. [2024-06-14 14:01:22,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15833 conditions, 2421 events. 1458/2421 cut-off events. For 83571/83571 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 13390 event pairs, 424 based on Foata normal form. 2/2419 useless extension candidates. Maximal degree in co-relation 15766. Up to 2035 conditions per place. [2024-06-14 14:01:22,697 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 128 selfloop transitions, 48 changer transitions 0/183 dead transitions. [2024-06-14 14:01:22,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 183 transitions, 2334 flow [2024-06-14 14:01:22,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:01:22,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:01:22,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-14 14:01:22,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5505952380952381 [2024-06-14 14:01:22,699 INFO L175 Difference]: Start difference. First operand has 134 places, 145 transitions, 1464 flow. Second operand 8 states and 185 transitions. [2024-06-14 14:01:22,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 183 transitions, 2334 flow [2024-06-14 14:01:22,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 183 transitions, 2264 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-14 14:01:22,811 INFO L231 Difference]: Finished difference. Result has 140 places, 161 transitions, 1766 flow [2024-06-14 14:01:22,811 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1394, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1766, PETRI_PLACES=140, PETRI_TRANSITIONS=161} [2024-06-14 14:01:22,812 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 97 predicate places. [2024-06-14 14:01:22,812 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 161 transitions, 1766 flow [2024-06-14 14:01:22,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:22,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:01:22,812 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:01:22,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-14 14:01:22,813 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:01:22,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:01:22,814 INFO L85 PathProgramCache]: Analyzing trace with hash 517847546, now seen corresponding path program 3 times [2024-06-14 14:01:22,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:01:22,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742654458] [2024-06-14 14:01:22,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:01:22,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:01:22,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:23,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:01:23,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:23,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742654458] [2024-06-14 14:01:23,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742654458] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:23,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:23,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:01:23,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662228111] [2024-06-14 14:01:23,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:23,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:01:23,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:23,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:01:23,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:01:23,174 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:01:23,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 161 transitions, 1766 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:23,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:23,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:01:23,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:23,539 INFO L124 PetriNetUnfolderBase]: 1455/2410 cut-off events. [2024-06-14 14:01:23,539 INFO L125 PetriNetUnfolderBase]: For 87813/87813 co-relation queries the response was YES. [2024-06-14 14:01:23,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16498 conditions, 2410 events. 1455/2410 cut-off events. For 87813/87813 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 13171 event pairs, 411 based on Foata normal form. 1/2410 useless extension candidates. Maximal degree in co-relation 16428. Up to 2204 conditions per place. [2024-06-14 14:01:23,559 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 151 selfloop transitions, 18 changer transitions 0/176 dead transitions. [2024-06-14 14:01:23,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 176 transitions, 2142 flow [2024-06-14 14:01:23,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 14:01:23,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 14:01:23,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 123 transitions. [2024-06-14 14:01:23,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5857142857142857 [2024-06-14 14:01:23,560 INFO L175 Difference]: Start difference. First operand has 140 places, 161 transitions, 1766 flow. Second operand 5 states and 123 transitions. [2024-06-14 14:01:23,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 176 transitions, 2142 flow [2024-06-14 14:01:23,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 176 transitions, 2013 flow, removed 51 selfloop flow, removed 2 redundant places. [2024-06-14 14:01:23,672 INFO L231 Difference]: Finished difference. Result has 143 places, 161 transitions, 1683 flow [2024-06-14 14:01:23,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1637, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1683, PETRI_PLACES=143, PETRI_TRANSITIONS=161} [2024-06-14 14:01:23,672 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 100 predicate places. [2024-06-14 14:01:23,672 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 161 transitions, 1683 flow [2024-06-14 14:01:23,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:23,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:01:23,673 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:01:23,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-14 14:01:23,673 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:01:23,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:01:23,674 INFO L85 PathProgramCache]: Analyzing trace with hash 237984916, now seen corresponding path program 2 times [2024-06-14 14:01:23,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:01:23,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377913022] [2024-06-14 14:01:23,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:01:23,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:01:23,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:23,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:01:23,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:23,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377913022] [2024-06-14 14:01:23,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377913022] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:23,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:23,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:01:23,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972437313] [2024-06-14 14:01:23,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:23,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:01:23,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:23,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:01:23,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:01:24,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:01:24,023 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 161 transitions, 1683 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:24,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:24,023 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:01:24,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:24,410 INFO L124 PetriNetUnfolderBase]: 1526/2533 cut-off events. [2024-06-14 14:01:24,410 INFO L125 PetriNetUnfolderBase]: For 96915/96915 co-relation queries the response was YES. [2024-06-14 14:01:24,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17389 conditions, 2533 events. 1526/2533 cut-off events. For 96915/96915 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 14179 event pairs, 431 based on Foata normal form. 3/2533 useless extension candidates. Maximal degree in co-relation 17317. Up to 2094 conditions per place. [2024-06-14 14:01:24,471 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 123 selfloop transitions, 70 changer transitions 0/200 dead transitions. [2024-06-14 14:01:24,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 200 transitions, 2576 flow [2024-06-14 14:01:24,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:01:24,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:01:24,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-14 14:01:24,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5816326530612245 [2024-06-14 14:01:24,472 INFO L175 Difference]: Start difference. First operand has 143 places, 161 transitions, 1683 flow. Second operand 7 states and 171 transitions. [2024-06-14 14:01:24,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 200 transitions, 2576 flow [2024-06-14 14:01:24,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 200 transitions, 2521 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-14 14:01:24,579 INFO L231 Difference]: Finished difference. Result has 147 places, 181 transitions, 2130 flow [2024-06-14 14:01:24,579 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1630, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2130, PETRI_PLACES=147, PETRI_TRANSITIONS=181} [2024-06-14 14:01:24,580 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 104 predicate places. [2024-06-14 14:01:24,580 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 181 transitions, 2130 flow [2024-06-14 14:01:24,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:24,580 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:01:24,580 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:01:24,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-14 14:01:24,580 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:01:24,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:01:24,581 INFO L85 PathProgramCache]: Analyzing trace with hash 222784996, now seen corresponding path program 3 times [2024-06-14 14:01:24,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:01:24,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345535631] [2024-06-14 14:01:24,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:01:24,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:01:24,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:24,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:01:24,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:24,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345535631] [2024-06-14 14:01:24,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345535631] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:24,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:24,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:01:24,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46920682] [2024-06-14 14:01:24,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:24,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:01:24,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:24,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:01:24,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:01:24,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:01:24,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 181 transitions, 2130 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:24,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:24,902 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:01:24,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:25,380 INFO L124 PetriNetUnfolderBase]: 1519/2527 cut-off events. [2024-06-14 14:01:25,381 INFO L125 PetriNetUnfolderBase]: For 103352/103352 co-relation queries the response was YES. [2024-06-14 14:01:25,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18106 conditions, 2527 events. 1519/2527 cut-off events. For 103352/103352 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 14199 event pairs, 432 based on Foata normal form. 3/2527 useless extension candidates. Maximal degree in co-relation 18032. Up to 2091 conditions per place. [2024-06-14 14:01:25,405 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 125 selfloop transitions, 74 changer transitions 0/206 dead transitions. [2024-06-14 14:01:25,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 206 transitions, 2854 flow [2024-06-14 14:01:25,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:01:25,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:01:25,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-14 14:01:25,406 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-06-14 14:01:25,406 INFO L175 Difference]: Start difference. First operand has 147 places, 181 transitions, 2130 flow. Second operand 6 states and 154 transitions. [2024-06-14 14:01:25,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 206 transitions, 2854 flow [2024-06-14 14:01:25,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 206 transitions, 2671 flow, removed 73 selfloop flow, removed 3 redundant places. [2024-06-14 14:01:25,521 INFO L231 Difference]: Finished difference. Result has 151 places, 187 transitions, 2282 flow [2024-06-14 14:01:25,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1965, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2282, PETRI_PLACES=151, PETRI_TRANSITIONS=187} [2024-06-14 14:01:25,521 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 108 predicate places. [2024-06-14 14:01:25,521 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 187 transitions, 2282 flow [2024-06-14 14:01:25,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:25,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:01:25,522 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:01:25,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-14 14:01:25,522 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:01:25,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:01:25,523 INFO L85 PathProgramCache]: Analyzing trace with hash 223031074, now seen corresponding path program 1 times [2024-06-14 14:01:25,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:01:25,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617086104] [2024-06-14 14:01:25,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:01:25,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:01:25,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:25,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:01:25,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:25,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617086104] [2024-06-14 14:01:25,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617086104] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:25,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:25,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:01:25,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044912691] [2024-06-14 14:01:25,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:25,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:01:25,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:25,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:01:25,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:01:25,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-14 14:01:25,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 187 transitions, 2282 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:25,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:25,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-14 14:01:25,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:26,262 INFO L124 PetriNetUnfolderBase]: 1485/2501 cut-off events. [2024-06-14 14:01:26,263 INFO L125 PetriNetUnfolderBase]: For 113390/113390 co-relation queries the response was YES. [2024-06-14 14:01:26,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18075 conditions, 2501 events. 1485/2501 cut-off events. For 113390/113390 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 14187 event pairs, 427 based on Foata normal form. 12/2505 useless extension candidates. Maximal degree in co-relation 17999. Up to 2109 conditions per place. [2024-06-14 14:01:26,283 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 155 selfloop transitions, 22 changer transitions 0/202 dead transitions. [2024-06-14 14:01:26,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 202 transitions, 2710 flow [2024-06-14 14:01:26,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 14:01:26,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 14:01:26,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 125 transitions. [2024-06-14 14:01:26,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2024-06-14 14:01:26,285 INFO L175 Difference]: Start difference. First operand has 151 places, 187 transitions, 2282 flow. Second operand 5 states and 125 transitions. [2024-06-14 14:01:26,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 202 transitions, 2710 flow [2024-06-14 14:01:26,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 202 transitions, 2573 flow, removed 35 selfloop flow, removed 2 redundant places. [2024-06-14 14:01:26,412 INFO L231 Difference]: Finished difference. Result has 154 places, 189 transitions, 2228 flow [2024-06-14 14:01:26,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2145, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2228, PETRI_PLACES=154, PETRI_TRANSITIONS=189} [2024-06-14 14:01:26,413 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 111 predicate places. [2024-06-14 14:01:26,413 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 189 transitions, 2228 flow [2024-06-14 14:01:26,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:26,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:01:26,414 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:01:26,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-14 14:01:26,414 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:01:26,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:01:26,414 INFO L85 PathProgramCache]: Analyzing trace with hash -1753294578, now seen corresponding path program 1 times [2024-06-14 14:01:26,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:01:26,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631579013] [2024-06-14 14:01:26,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:01:26,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:01:26,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:26,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:01:26,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:26,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631579013] [2024-06-14 14:01:26,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631579013] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:26,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:26,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:01:26,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331048145] [2024-06-14 14:01:26,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:26,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:01:26,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:26,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:01:26,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:01:26,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:01:26,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 189 transitions, 2228 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:26,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:26,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:01:26,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:27,233 INFO L124 PetriNetUnfolderBase]: 1679/2817 cut-off events. [2024-06-14 14:01:27,233 INFO L125 PetriNetUnfolderBase]: For 136836/136836 co-relation queries the response was YES. [2024-06-14 14:01:27,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19575 conditions, 2817 events. 1679/2817 cut-off events. For 136836/136836 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 16101 event pairs, 327 based on Foata normal form. 42/2856 useless extension candidates. Maximal degree in co-relation 19498. Up to 1655 conditions per place. [2024-06-14 14:01:27,254 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 183 selfloop transitions, 44 changer transitions 5/239 dead transitions. [2024-06-14 14:01:27,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 239 transitions, 3043 flow [2024-06-14 14:01:27,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:01:27,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:01:27,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 215 transitions. [2024-06-14 14:01:27,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6398809523809523 [2024-06-14 14:01:27,257 INFO L175 Difference]: Start difference. First operand has 154 places, 189 transitions, 2228 flow. Second operand 8 states and 215 transitions. [2024-06-14 14:01:27,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 239 transitions, 3043 flow [2024-06-14 14:01:27,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 239 transitions, 2984 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-14 14:01:27,401 INFO L231 Difference]: Finished difference. Result has 159 places, 189 transitions, 2278 flow [2024-06-14 14:01:27,401 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2169, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2278, PETRI_PLACES=159, PETRI_TRANSITIONS=189} [2024-06-14 14:01:27,401 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 116 predicate places. [2024-06-14 14:01:27,402 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 189 transitions, 2278 flow [2024-06-14 14:01:27,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:27,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:01:27,402 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:01:27,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-14 14:01:27,403 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:01:27,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:01:27,403 INFO L85 PathProgramCache]: Analyzing trace with hash -537400354, now seen corresponding path program 2 times [2024-06-14 14:01:27,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:01:27,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101895132] [2024-06-14 14:01:27,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:01:27,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:01:27,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:27,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:01:27,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:27,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101895132] [2024-06-14 14:01:27,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101895132] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:27,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:27,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:01:27,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7209932] [2024-06-14 14:01:27,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:27,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:01:27,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:27,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:01:27,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:01:27,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:01:27,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 189 transitions, 2278 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:27,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:27,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:01:27,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:28,167 INFO L124 PetriNetUnfolderBase]: 1534/2586 cut-off events. [2024-06-14 14:01:28,168 INFO L125 PetriNetUnfolderBase]: For 117394/117394 co-relation queries the response was YES. [2024-06-14 14:01:28,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17151 conditions, 2586 events. 1534/2586 cut-off events. For 117394/117394 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 14512 event pairs, 390 based on Foata normal form. 50/2633 useless extension candidates. Maximal degree in co-relation 17073. Up to 2021 conditions per place. [2024-06-14 14:01:28,186 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 184 selfloop transitions, 36 changer transitions 3/230 dead transitions. [2024-06-14 14:01:28,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 230 transitions, 2892 flow [2024-06-14 14:01:28,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:01:28,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:01:28,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-14 14:01:28,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6101190476190477 [2024-06-14 14:01:28,187 INFO L175 Difference]: Start difference. First operand has 159 places, 189 transitions, 2278 flow. Second operand 8 states and 205 transitions. [2024-06-14 14:01:28,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 230 transitions, 2892 flow [2024-06-14 14:01:28,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 230 transitions, 2771 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-14 14:01:28,316 INFO L231 Difference]: Finished difference. Result has 162 places, 189 transitions, 2251 flow [2024-06-14 14:01:28,317 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2168, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2251, PETRI_PLACES=162, PETRI_TRANSITIONS=189} [2024-06-14 14:01:28,317 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 119 predicate places. [2024-06-14 14:01:28,317 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 189 transitions, 2251 flow [2024-06-14 14:01:28,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:28,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:01:28,318 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:01:28,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-14 14:01:28,318 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:01:28,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:01:28,318 INFO L85 PathProgramCache]: Analyzing trace with hash 1505598538, now seen corresponding path program 3 times [2024-06-14 14:01:28,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:01:28,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759829591] [2024-06-14 14:01:28,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:01:28,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:01:28,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:28,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:01:28,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:28,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759829591] [2024-06-14 14:01:28,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759829591] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:28,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:28,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:01:28,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509848032] [2024-06-14 14:01:28,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:28,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:01:28,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:28,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:01:28,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:01:28,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:01:28,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 189 transitions, 2251 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:28,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:28,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:01:28,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:29,022 INFO L124 PetriNetUnfolderBase]: 1582/2680 cut-off events. [2024-06-14 14:01:29,022 INFO L125 PetriNetUnfolderBase]: For 100809/100809 co-relation queries the response was YES. [2024-06-14 14:01:29,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17442 conditions, 2680 events. 1582/2680 cut-off events. For 100809/100809 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 15231 event pairs, 411 based on Foata normal form. 16/2694 useless extension candidates. Maximal degree in co-relation 17363. Up to 2200 conditions per place. [2024-06-14 14:01:29,046 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 168 selfloop transitions, 45 changer transitions 0/220 dead transitions. [2024-06-14 14:01:29,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 220 transitions, 2801 flow [2024-06-14 14:01:29,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:01:29,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:01:29,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-14 14:01:29,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5918367346938775 [2024-06-14 14:01:29,048 INFO L175 Difference]: Start difference. First operand has 162 places, 189 transitions, 2251 flow. Second operand 7 states and 174 transitions. [2024-06-14 14:01:29,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 220 transitions, 2801 flow [2024-06-14 14:01:29,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 220 transitions, 2729 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-14 14:01:29,202 INFO L231 Difference]: Finished difference. Result has 163 places, 190 transitions, 2304 flow [2024-06-14 14:01:29,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2179, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2304, PETRI_PLACES=163, PETRI_TRANSITIONS=190} [2024-06-14 14:01:29,203 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 120 predicate places. [2024-06-14 14:01:29,203 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 190 transitions, 2304 flow [2024-06-14 14:01:29,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:29,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:01:29,203 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:01:29,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-14 14:01:29,203 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:01:29,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:01:29,203 INFO L85 PathProgramCache]: Analyzing trace with hash 459263530, now seen corresponding path program 4 times [2024-06-14 14:01:29,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:01:29,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534597131] [2024-06-14 14:01:29,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:01:29,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:01:29,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:29,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:01:29,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:29,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534597131] [2024-06-14 14:01:29,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534597131] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:29,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:29,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:01:29,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134841513] [2024-06-14 14:01:29,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:29,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:01:29,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:29,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:01:29,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:01:29,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:01:29,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 190 transitions, 2304 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:29,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:29,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:01:29,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:30,058 INFO L124 PetriNetUnfolderBase]: 1640/2790 cut-off events. [2024-06-14 14:01:30,058 INFO L125 PetriNetUnfolderBase]: For 107475/107475 co-relation queries the response was YES. [2024-06-14 14:01:30,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18144 conditions, 2790 events. 1640/2790 cut-off events. For 107475/107475 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 16139 event pairs, 426 based on Foata normal form. 16/2804 useless extension candidates. Maximal degree in co-relation 18064. Up to 2298 conditions per place. [2024-06-14 14:01:30,081 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 173 selfloop transitions, 45 changer transitions 0/225 dead transitions. [2024-06-14 14:01:30,081 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 225 transitions, 2876 flow [2024-06-14 14:01:30,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:01:30,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:01:30,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-14 14:01:30,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5803571428571429 [2024-06-14 14:01:30,082 INFO L175 Difference]: Start difference. First operand has 163 places, 190 transitions, 2304 flow. Second operand 8 states and 195 transitions. [2024-06-14 14:01:30,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 225 transitions, 2876 flow [2024-06-14 14:01:30,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 225 transitions, 2769 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-14 14:01:30,263 INFO L231 Difference]: Finished difference. Result has 166 places, 191 transitions, 2324 flow [2024-06-14 14:01:30,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2197, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2324, PETRI_PLACES=166, PETRI_TRANSITIONS=191} [2024-06-14 14:01:30,263 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 123 predicate places. [2024-06-14 14:01:30,264 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 191 transitions, 2324 flow [2024-06-14 14:01:30,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:30,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:01:30,264 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:01:30,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-14 14:01:30,264 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:01:30,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:01:30,265 INFO L85 PathProgramCache]: Analyzing trace with hash -2138490898, now seen corresponding path program 5 times [2024-06-14 14:01:30,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:01:30,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202024053] [2024-06-14 14:01:30,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:01:30,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:01:30,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:30,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:01:30,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:30,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202024053] [2024-06-14 14:01:30,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202024053] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:30,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:30,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:01:30,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18605454] [2024-06-14 14:01:30,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:30,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:01:30,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:30,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:01:30,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:01:30,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:01:30,572 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 191 transitions, 2324 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:30,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:30,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:01:30,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:30,993 INFO L124 PetriNetUnfolderBase]: 1681/2861 cut-off events. [2024-06-14 14:01:30,993 INFO L125 PetriNetUnfolderBase]: For 110285/110285 co-relation queries the response was YES. [2024-06-14 14:01:31,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18547 conditions, 2861 events. 1681/2861 cut-off events. For 110285/110285 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 16639 event pairs, 421 based on Foata normal form. 12/2871 useless extension candidates. Maximal degree in co-relation 18466. Up to 2282 conditions per place. [2024-06-14 14:01:31,017 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 178 selfloop transitions, 48 changer transitions 0/233 dead transitions. [2024-06-14 14:01:31,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 233 transitions, 2946 flow [2024-06-14 14:01:31,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:01:31,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:01:31,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 218 transitions. [2024-06-14 14:01:31,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5767195767195767 [2024-06-14 14:01:31,021 INFO L175 Difference]: Start difference. First operand has 166 places, 191 transitions, 2324 flow. Second operand 9 states and 218 transitions. [2024-06-14 14:01:31,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 233 transitions, 2946 flow [2024-06-14 14:01:31,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 233 transitions, 2837 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-14 14:01:31,183 INFO L231 Difference]: Finished difference. Result has 169 places, 192 transitions, 2349 flow [2024-06-14 14:01:31,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2215, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2349, PETRI_PLACES=169, PETRI_TRANSITIONS=192} [2024-06-14 14:01:31,184 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 126 predicate places. [2024-06-14 14:01:31,184 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 192 transitions, 2349 flow [2024-06-14 14:01:31,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:31,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:01:31,185 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:01:31,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-14 14:01:31,185 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:01:31,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:01:31,186 INFO L85 PathProgramCache]: Analyzing trace with hash 928483080, now seen corresponding path program 1 times [2024-06-14 14:01:31,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:01:31,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230267425] [2024-06-14 14:01:31,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:01:31,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:01:31,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:31,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:01:31,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:31,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230267425] [2024-06-14 14:01:31,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230267425] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:31,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:31,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:01:31,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303906167] [2024-06-14 14:01:31,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:31,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:01:31,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:31,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:01:31,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:01:31,459 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:01:31,459 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 192 transitions, 2349 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:31,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:31,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:01:31,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:31,921 INFO L124 PetriNetUnfolderBase]: 1808/3094 cut-off events. [2024-06-14 14:01:31,921 INFO L125 PetriNetUnfolderBase]: For 127797/127797 co-relation queries the response was YES. [2024-06-14 14:01:31,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20336 conditions, 3094 events. 1808/3094 cut-off events. For 127797/127797 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 18500 event pairs, 463 based on Foata normal form. 12/3104 useless extension candidates. Maximal degree in co-relation 20254. Up to 2183 conditions per place. [2024-06-14 14:01:31,946 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 172 selfloop transitions, 50 changer transitions 0/229 dead transitions. [2024-06-14 14:01:31,946 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 229 transitions, 3113 flow [2024-06-14 14:01:31,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:01:31,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:01:31,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-14 14:01:31,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6054421768707483 [2024-06-14 14:01:31,948 INFO L175 Difference]: Start difference. First operand has 169 places, 192 transitions, 2349 flow. Second operand 7 states and 178 transitions. [2024-06-14 14:01:31,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 229 transitions, 3113 flow [2024-06-14 14:01:32,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 229 transitions, 2993 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-14 14:01:32,125 INFO L231 Difference]: Finished difference. Result has 169 places, 194 transitions, 2401 flow [2024-06-14 14:01:32,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2229, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2401, PETRI_PLACES=169, PETRI_TRANSITIONS=194} [2024-06-14 14:01:32,126 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 126 predicate places. [2024-06-14 14:01:32,126 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 194 transitions, 2401 flow [2024-06-14 14:01:32,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:32,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:01:32,126 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:01:32,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-14 14:01:32,127 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:01:32,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:01:32,127 INFO L85 PathProgramCache]: Analyzing trace with hash -689188672, now seen corresponding path program 1 times [2024-06-14 14:01:32,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:01:32,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611233586] [2024-06-14 14:01:32,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:01:32,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:01:32,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:32,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:01:32,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:32,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611233586] [2024-06-14 14:01:32,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611233586] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:32,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:32,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:01:32,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233512265] [2024-06-14 14:01:32,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:32,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:01:32,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:32,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:01:32,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:01:32,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:01:32,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 194 transitions, 2401 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:32,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:32,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:01:32,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:32,893 INFO L124 PetriNetUnfolderBase]: 1837/3111 cut-off events. [2024-06-14 14:01:32,893 INFO L125 PetriNetUnfolderBase]: For 127612/127612 co-relation queries the response was YES. [2024-06-14 14:01:32,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20890 conditions, 3111 events. 1837/3111 cut-off events. For 127612/127612 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 18450 event pairs, 470 based on Foata normal form. 1/3110 useless extension candidates. Maximal degree in co-relation 20807. Up to 2635 conditions per place. [2024-06-14 14:01:32,921 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 149 selfloop transitions, 75 changer transitions 0/231 dead transitions. [2024-06-14 14:01:32,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 231 transitions, 3391 flow [2024-06-14 14:01:32,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:01:32,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:01:32,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 210 transitions. [2024-06-14 14:01:32,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2024-06-14 14:01:32,922 INFO L175 Difference]: Start difference. First operand has 169 places, 194 transitions, 2401 flow. Second operand 9 states and 210 transitions. [2024-06-14 14:01:32,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 231 transitions, 3391 flow [2024-06-14 14:01:33,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 231 transitions, 3308 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-14 14:01:33,164 INFO L231 Difference]: Finished difference. Result has 178 places, 206 transitions, 2797 flow [2024-06-14 14:01:33,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2318, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2797, PETRI_PLACES=178, PETRI_TRANSITIONS=206} [2024-06-14 14:01:33,164 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 135 predicate places. [2024-06-14 14:01:33,165 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 206 transitions, 2797 flow [2024-06-14 14:01:33,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:33,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:01:33,165 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:01:33,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-14 14:01:33,165 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:01:33,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:01:33,166 INFO L85 PathProgramCache]: Analyzing trace with hash -683474752, now seen corresponding path program 2 times [2024-06-14 14:01:33,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:01:33,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978657531] [2024-06-14 14:01:33,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:01:33,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:01:33,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:33,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:01:33,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:33,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978657531] [2024-06-14 14:01:33,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978657531] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:33,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:33,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:01:33,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534323525] [2024-06-14 14:01:33,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:33,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:01:33,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:33,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:01:33,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:01:33,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:01:33,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 206 transitions, 2797 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:33,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:33,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:01:33,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:33,946 INFO L124 PetriNetUnfolderBase]: 1858/3172 cut-off events. [2024-06-14 14:01:33,946 INFO L125 PetriNetUnfolderBase]: For 133388/133388 co-relation queries the response was YES. [2024-06-14 14:01:33,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21601 conditions, 3172 events. 1858/3172 cut-off events. For 133388/133388 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 18965 event pairs, 477 based on Foata normal form. 2/3171 useless extension candidates. Maximal degree in co-relation 21513. Up to 2783 conditions per place. [2024-06-14 14:01:33,976 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 184 selfloop transitions, 46 changer transitions 0/237 dead transitions. [2024-06-14 14:01:33,977 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 237 transitions, 3562 flow [2024-06-14 14:01:33,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:01:33,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:01:33,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 158 transitions. [2024-06-14 14:01:33,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.626984126984127 [2024-06-14 14:01:33,978 INFO L175 Difference]: Start difference. First operand has 178 places, 206 transitions, 2797 flow. Second operand 6 states and 158 transitions. [2024-06-14 14:01:33,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 237 transitions, 3562 flow [2024-06-14 14:01:34,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 237 transitions, 3360 flow, removed 63 selfloop flow, removed 4 redundant places. [2024-06-14 14:01:34,168 INFO L231 Difference]: Finished difference. Result has 181 places, 213 transitions, 2883 flow [2024-06-14 14:01:34,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2612, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2883, PETRI_PLACES=181, PETRI_TRANSITIONS=213} [2024-06-14 14:01:34,168 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 138 predicate places. [2024-06-14 14:01:34,169 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 213 transitions, 2883 flow [2024-06-14 14:01:34,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:34,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:01:34,169 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:01:34,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-14 14:01:34,169 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:01:34,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:01:34,170 INFO L85 PathProgramCache]: Analyzing trace with hash -480727646, now seen corresponding path program 6 times [2024-06-14 14:01:34,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:01:34,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963830423] [2024-06-14 14:01:34,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:01:34,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:01:34,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:34,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:01:34,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:34,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963830423] [2024-06-14 14:01:34,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963830423] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:34,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:34,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:01:34,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108036190] [2024-06-14 14:01:34,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:34,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:01:34,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:34,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:01:34,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:01:34,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:01:34,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 213 transitions, 2883 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:34,512 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:34,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:01:34,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:35,058 INFO L124 PetriNetUnfolderBase]: 1830/3103 cut-off events. [2024-06-14 14:01:35,058 INFO L125 PetriNetUnfolderBase]: For 137157/137157 co-relation queries the response was YES. [2024-06-14 14:01:35,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20732 conditions, 3103 events. 1830/3103 cut-off events. For 137157/137157 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 18487 event pairs, 504 based on Foata normal form. 16/3111 useless extension candidates. Maximal degree in co-relation 20642. Up to 2599 conditions per place. [2024-06-14 14:01:35,090 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 188 selfloop transitions, 49 changer transitions 0/244 dead transitions. [2024-06-14 14:01:35,091 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 244 transitions, 3457 flow [2024-06-14 14:01:35,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:01:35,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:01:35,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-14 14:01:35,092 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5684523809523809 [2024-06-14 14:01:35,092 INFO L175 Difference]: Start difference. First operand has 181 places, 213 transitions, 2883 flow. Second operand 8 states and 191 transitions. [2024-06-14 14:01:35,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 244 transitions, 3457 flow [2024-06-14 14:01:35,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 244 transitions, 3366 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-14 14:01:35,353 INFO L231 Difference]: Finished difference. Result has 185 places, 213 transitions, 2897 flow [2024-06-14 14:01:35,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2792, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2897, PETRI_PLACES=185, PETRI_TRANSITIONS=213} [2024-06-14 14:01:35,353 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 142 predicate places. [2024-06-14 14:01:35,354 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 213 transitions, 2897 flow [2024-06-14 14:01:35,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:35,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:01:35,354 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:01:35,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-14 14:01:35,354 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:01:35,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:01:35,355 INFO L85 PathProgramCache]: Analyzing trace with hash -480875516, now seen corresponding path program 7 times [2024-06-14 14:01:35,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:01:35,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689456414] [2024-06-14 14:01:35,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:01:35,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:01:35,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:35,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:01:35,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:35,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689456414] [2024-06-14 14:01:35,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689456414] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:35,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:35,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:01:35,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876896833] [2024-06-14 14:01:35,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:35,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:01:35,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:35,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:01:35,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:01:35,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:01:35,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 213 transitions, 2897 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:35,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:35,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:01:35,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:36,129 INFO L124 PetriNetUnfolderBase]: 1871/3174 cut-off events. [2024-06-14 14:01:36,129 INFO L125 PetriNetUnfolderBase]: For 141016/141016 co-relation queries the response was YES. [2024-06-14 14:01:36,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21224 conditions, 3174 events. 1871/3174 cut-off events. For 141016/141016 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 19013 event pairs, 499 based on Foata normal form. 12/3178 useless extension candidates. Maximal degree in co-relation 21133. Up to 2583 conditions per place. [2024-06-14 14:01:36,157 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 193 selfloop transitions, 52 changer transitions 0/252 dead transitions. [2024-06-14 14:01:36,158 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 252 transitions, 3553 flow [2024-06-14 14:01:36,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:01:36,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:01:36,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 214 transitions. [2024-06-14 14:01:36,160 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5661375661375662 [2024-06-14 14:01:36,160 INFO L175 Difference]: Start difference. First operand has 185 places, 213 transitions, 2897 flow. Second operand 9 states and 214 transitions. [2024-06-14 14:01:36,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 252 transitions, 3553 flow [2024-06-14 14:01:36,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 252 transitions, 3450 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-14 14:01:36,442 INFO L231 Difference]: Finished difference. Result has 188 places, 214 transitions, 2940 flow [2024-06-14 14:01:36,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2794, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2940, PETRI_PLACES=188, PETRI_TRANSITIONS=214} [2024-06-14 14:01:36,443 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 145 predicate places. [2024-06-14 14:01:36,443 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 214 transitions, 2940 flow [2024-06-14 14:01:36,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:36,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:01:36,444 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:01:36,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-14 14:01:36,444 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:01:36,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:01:36,445 INFO L85 PathProgramCache]: Analyzing trace with hash -614329088, now seen corresponding path program 8 times [2024-06-14 14:01:36,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:01:36,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971342004] [2024-06-14 14:01:36,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:01:36,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:01:36,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:36,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:01:36,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:36,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971342004] [2024-06-14 14:01:36,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971342004] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:36,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:36,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:01:36,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207536524] [2024-06-14 14:01:36,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:36,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:01:36,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:36,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:01:36,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:01:36,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:01:36,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 214 transitions, 2940 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:36,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:36,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:01:36,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:37,174 INFO L124 PetriNetUnfolderBase]: 1904/3251 cut-off events. [2024-06-14 14:01:37,174 INFO L125 PetriNetUnfolderBase]: For 148567/148571 co-relation queries the response was YES. [2024-06-14 14:01:37,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21516 conditions, 3251 events. 1904/3251 cut-off events. For 148567/148571 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 19696 event pairs, 514 based on Foata normal form. 20/3268 useless extension candidates. Maximal degree in co-relation 21424. Up to 2729 conditions per place. [2024-06-14 14:01:37,205 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 189 selfloop transitions, 46 changer transitions 0/242 dead transitions. [2024-06-14 14:01:37,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 242 transitions, 3536 flow [2024-06-14 14:01:37,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:01:37,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:01:37,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-14 14:01:37,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5782312925170068 [2024-06-14 14:01:37,206 INFO L175 Difference]: Start difference. First operand has 188 places, 214 transitions, 2940 flow. Second operand 7 states and 170 transitions. [2024-06-14 14:01:37,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 242 transitions, 3536 flow [2024-06-14 14:01:37,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 242 transitions, 3404 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-14 14:01:37,452 INFO L231 Difference]: Finished difference. Result has 188 places, 215 transitions, 2945 flow [2024-06-14 14:01:37,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2808, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2945, PETRI_PLACES=188, PETRI_TRANSITIONS=215} [2024-06-14 14:01:37,453 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 145 predicate places. [2024-06-14 14:01:37,453 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 215 transitions, 2945 flow [2024-06-14 14:01:37,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:37,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:01:37,454 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:01:37,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-14 14:01:37,454 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:01:37,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:01:37,454 INFO L85 PathProgramCache]: Analyzing trace with hash -728240538, now seen corresponding path program 2 times [2024-06-14 14:01:37,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:01:37,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847108631] [2024-06-14 14:01:37,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:01:37,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:01:37,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:37,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:01:37,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:37,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847108631] [2024-06-14 14:01:37,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847108631] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:37,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:37,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:01:37,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055508241] [2024-06-14 14:01:37,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:37,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:01:37,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:37,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:01:37,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:01:37,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:01:37,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 215 transitions, 2945 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:37,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:37,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:01:37,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:38,241 INFO L124 PetriNetUnfolderBase]: 1945/3332 cut-off events. [2024-06-14 14:01:38,241 INFO L125 PetriNetUnfolderBase]: For 151216/151220 co-relation queries the response was YES. [2024-06-14 14:01:38,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21869 conditions, 3332 events. 1945/3332 cut-off events. For 151216/151220 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 20371 event pairs, 514 based on Foata normal form. 16/3345 useless extension candidates. Maximal degree in co-relation 21776. Up to 2713 conditions per place. [2024-06-14 14:01:38,269 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 191 selfloop transitions, 48 changer transitions 0/246 dead transitions. [2024-06-14 14:01:38,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 246 transitions, 3565 flow [2024-06-14 14:01:38,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:01:38,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:01:38,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-14 14:01:38,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884353741496599 [2024-06-14 14:01:38,270 INFO L175 Difference]: Start difference. First operand has 188 places, 215 transitions, 2945 flow. Second operand 7 states and 173 transitions. [2024-06-14 14:01:38,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 246 transitions, 3565 flow [2024-06-14 14:01:38,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 246 transitions, 3446 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-14 14:01:38,554 INFO L231 Difference]: Finished difference. Result has 190 places, 216 transitions, 2968 flow [2024-06-14 14:01:38,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2826, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2968, PETRI_PLACES=190, PETRI_TRANSITIONS=216} [2024-06-14 14:01:38,555 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 147 predicate places. [2024-06-14 14:01:38,555 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 216 transitions, 2968 flow [2024-06-14 14:01:38,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:38,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:01:38,555 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:01:38,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-14 14:01:38,556 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:01:38,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:01:38,556 INFO L85 PathProgramCache]: Analyzing trace with hash -166379930, now seen corresponding path program 3 times [2024-06-14 14:01:38,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:01:38,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53894915] [2024-06-14 14:01:38,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:01:38,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:01:38,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:38,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:01:38,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:38,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53894915] [2024-06-14 14:01:38,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53894915] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:38,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:38,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:01:38,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426144399] [2024-06-14 14:01:38,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:38,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:01:38,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:38,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:01:38,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:01:38,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:01:38,791 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 216 transitions, 2968 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:38,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:38,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:01:38,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:39,263 INFO L124 PetriNetUnfolderBase]: 1925/3300 cut-off events. [2024-06-14 14:01:39,263 INFO L125 PetriNetUnfolderBase]: For 144076/144080 co-relation queries the response was YES. [2024-06-14 14:01:39,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21114 conditions, 3300 events. 1925/3300 cut-off events. For 144076/144080 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 20153 event pairs, 459 based on Foata normal form. 16/3313 useless extension candidates. Maximal degree in co-relation 21020. Up to 2111 conditions per place. [2024-06-14 14:01:39,298 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 182 selfloop transitions, 57 changer transitions 0/246 dead transitions. [2024-06-14 14:01:39,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 246 transitions, 3480 flow [2024-06-14 14:01:39,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:01:39,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:01:39,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-14 14:01:39,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5850340136054422 [2024-06-14 14:01:39,300 INFO L175 Difference]: Start difference. First operand has 190 places, 216 transitions, 2968 flow. Second operand 7 states and 172 transitions. [2024-06-14 14:01:39,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 246 transitions, 3480 flow [2024-06-14 14:01:39,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 246 transitions, 3338 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-14 14:01:39,577 INFO L231 Difference]: Finished difference. Result has 190 places, 215 transitions, 2872 flow [2024-06-14 14:01:39,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2754, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2872, PETRI_PLACES=190, PETRI_TRANSITIONS=215} [2024-06-14 14:01:39,577 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 147 predicate places. [2024-06-14 14:01:39,577 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 215 transitions, 2872 flow [2024-06-14 14:01:39,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:39,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:01:39,578 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:01:39,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-14 14:01:39,578 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:01:39,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:01:39,578 INFO L85 PathProgramCache]: Analyzing trace with hash 596734886, now seen corresponding path program 3 times [2024-06-14 14:01:39,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:01:39,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152485559] [2024-06-14 14:01:39,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:01:39,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:01:39,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:39,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:01:39,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:39,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152485559] [2024-06-14 14:01:39,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152485559] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:39,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:39,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:01:39,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407805021] [2024-06-14 14:01:39,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:39,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:01:39,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:39,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:01:39,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:01:39,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:01:39,902 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 215 transitions, 2872 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:39,902 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:39,902 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:01:39,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:40,510 INFO L124 PetriNetUnfolderBase]: 1930/3293 cut-off events. [2024-06-14 14:01:40,511 INFO L125 PetriNetUnfolderBase]: For 128073/128073 co-relation queries the response was YES. [2024-06-14 14:01:40,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20928 conditions, 3293 events. 1930/3293 cut-off events. For 128073/128073 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 19990 event pairs, 500 based on Foata normal form. 1/3289 useless extension candidates. Maximal degree in co-relation 20834. Up to 2931 conditions per place. [2024-06-14 14:01:40,542 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 189 selfloop transitions, 41 changer transitions 0/237 dead transitions. [2024-06-14 14:01:40,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 237 transitions, 3535 flow [2024-06-14 14:01:40,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:01:40,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:01:40,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-14 14:01:40,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2024-06-14 14:01:40,543 INFO L175 Difference]: Start difference. First operand has 190 places, 215 transitions, 2872 flow. Second operand 8 states and 180 transitions. [2024-06-14 14:01:40,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 237 transitions, 3535 flow [2024-06-14 14:01:40,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 237 transitions, 3348 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-14 14:01:40,775 INFO L231 Difference]: Finished difference. Result has 191 places, 218 transitions, 2838 flow [2024-06-14 14:01:40,775 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2685, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2838, PETRI_PLACES=191, PETRI_TRANSITIONS=218} [2024-06-14 14:01:40,775 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 148 predicate places. [2024-06-14 14:01:40,775 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 218 transitions, 2838 flow [2024-06-14 14:01:40,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:40,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:01:40,776 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:01:40,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-14 14:01:40,776 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:01:40,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:01:40,776 INFO L85 PathProgramCache]: Analyzing trace with hash -215092072, now seen corresponding path program 4 times [2024-06-14 14:01:40,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:01:40,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554696942] [2024-06-14 14:01:40,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:01:40,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:01:40,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:40,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:01:40,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:40,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554696942] [2024-06-14 14:01:40,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554696942] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:40,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:40,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:01:40,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608184271] [2024-06-14 14:01:40,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:40,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:01:40,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:40,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:01:40,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:01:41,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:01:41,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 218 transitions, 2838 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:41,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:41,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:01:41,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:41,560 INFO L124 PetriNetUnfolderBase]: 1922/3276 cut-off events. [2024-06-14 14:01:41,560 INFO L125 PetriNetUnfolderBase]: For 127386/127386 co-relation queries the response was YES. [2024-06-14 14:01:41,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20296 conditions, 3276 events. 1922/3276 cut-off events. For 127386/127386 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 19802 event pairs, 495 based on Foata normal form. 2/3273 useless extension candidates. Maximal degree in co-relation 20203. Up to 2779 conditions per place. [2024-06-14 14:01:41,590 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 152 selfloop transitions, 76 changer transitions 0/235 dead transitions. [2024-06-14 14:01:41,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 235 transitions, 3522 flow [2024-06-14 14:01:41,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:01:41,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:01:41,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-14 14:01:41,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5446428571428571 [2024-06-14 14:01:41,591 INFO L175 Difference]: Start difference. First operand has 191 places, 218 transitions, 2838 flow. Second operand 8 states and 183 transitions. [2024-06-14 14:01:41,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 235 transitions, 3522 flow [2024-06-14 14:01:41,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 235 transitions, 3340 flow, removed 43 selfloop flow, removed 7 redundant places. [2024-06-14 14:01:41,849 INFO L231 Difference]: Finished difference. Result has 192 places, 218 transitions, 2816 flow [2024-06-14 14:01:41,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2656, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2816, PETRI_PLACES=192, PETRI_TRANSITIONS=218} [2024-06-14 14:01:41,849 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 149 predicate places. [2024-06-14 14:01:41,849 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 218 transitions, 2816 flow [2024-06-14 14:01:41,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:41,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:01:41,849 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:01:41,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-14 14:01:41,850 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:01:41,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:01:41,850 INFO L85 PathProgramCache]: Analyzing trace with hash 981017752, now seen corresponding path program 5 times [2024-06-14 14:01:41,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:01:41,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270192000] [2024-06-14 14:01:41,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:01:41,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:01:41,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:42,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:01:42,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:42,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270192000] [2024-06-14 14:01:42,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270192000] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:42,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:42,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:01:42,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975606567] [2024-06-14 14:01:42,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:42,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:01:42,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:42,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:01:42,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:01:42,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:01:42,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 218 transitions, 2816 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:42,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:42,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:01:42,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:42,637 INFO L124 PetriNetUnfolderBase]: 1914/3268 cut-off events. [2024-06-14 14:01:42,637 INFO L125 PetriNetUnfolderBase]: For 128570/128570 co-relation queries the response was YES. [2024-06-14 14:01:42,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20164 conditions, 3268 events. 1914/3268 cut-off events. For 128570/128570 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 19806 event pairs, 497 based on Foata normal form. 2/3267 useless extension candidates. Maximal degree in co-relation 20071. Up to 2773 conditions per place. [2024-06-14 14:01:42,669 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 151 selfloop transitions, 81 changer transitions 0/239 dead transitions. [2024-06-14 14:01:42,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 239 transitions, 3445 flow [2024-06-14 14:01:42,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:01:42,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:01:42,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-14 14:01:42,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6150793650793651 [2024-06-14 14:01:42,671 INFO L175 Difference]: Start difference. First operand has 192 places, 218 transitions, 2816 flow. Second operand 6 states and 155 transitions. [2024-06-14 14:01:42,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 239 transitions, 3445 flow [2024-06-14 14:01:42,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 239 transitions, 3269 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-14 14:01:43,001 INFO L231 Difference]: Finished difference. Result has 192 places, 218 transitions, 2817 flow [2024-06-14 14:01:43,002 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2642, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2817, PETRI_PLACES=192, PETRI_TRANSITIONS=218} [2024-06-14 14:01:43,002 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 149 predicate places. [2024-06-14 14:01:43,002 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 218 transitions, 2817 flow [2024-06-14 14:01:43,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:43,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:01:43,003 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:01:43,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-14 14:01:43,003 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:01:43,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:01:43,004 INFO L85 PathProgramCache]: Analyzing trace with hash -218802059, now seen corresponding path program 1 times [2024-06-14 14:01:43,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:01:43,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490952898] [2024-06-14 14:01:43,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:01:43,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:01:43,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:43,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:01:43,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:43,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490952898] [2024-06-14 14:01:43,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490952898] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:43,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:43,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:01:43,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626985955] [2024-06-14 14:01:43,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:43,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:01:43,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:43,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:01:43,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:01:43,302 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:01:43,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 218 transitions, 2817 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:43,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:43,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:01:43,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:43,756 INFO L124 PetriNetUnfolderBase]: 1942/3322 cut-off events. [2024-06-14 14:01:43,756 INFO L125 PetriNetUnfolderBase]: For 136397/136401 co-relation queries the response was YES. [2024-06-14 14:01:43,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20686 conditions, 3322 events. 1942/3322 cut-off events. For 136397/136401 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 20179 event pairs, 490 based on Foata normal form. 6/3326 useless extension candidates. Maximal degree in co-relation 20592. Up to 2802 conditions per place. [2024-06-14 14:01:43,788 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 159 selfloop transitions, 78 changer transitions 0/244 dead transitions. [2024-06-14 14:01:43,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 244 transitions, 3684 flow [2024-06-14 14:01:43,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:01:43,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:01:43,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-14 14:01:43,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5446428571428571 [2024-06-14 14:01:43,789 INFO L175 Difference]: Start difference. First operand has 192 places, 218 transitions, 2817 flow. Second operand 8 states and 183 transitions. [2024-06-14 14:01:43,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 244 transitions, 3684 flow [2024-06-14 14:01:44,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 244 transitions, 3461 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-14 14:01:44,041 INFO L231 Difference]: Finished difference. Result has 194 places, 227 transitions, 2930 flow [2024-06-14 14:01:44,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2594, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2930, PETRI_PLACES=194, PETRI_TRANSITIONS=227} [2024-06-14 14:01:44,041 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 151 predicate places. [2024-06-14 14:01:44,041 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 227 transitions, 2930 flow [2024-06-14 14:01:44,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:44,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:01:44,041 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:01:44,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-14 14:01:44,042 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:01:44,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:01:44,042 INFO L85 PathProgramCache]: Analyzing trace with hash -1446632379, now seen corresponding path program 2 times [2024-06-14 14:01:44,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:01:44,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974813804] [2024-06-14 14:01:44,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:01:44,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:01:44,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:44,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:01:44,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:44,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974813804] [2024-06-14 14:01:44,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974813804] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:44,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:44,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:01:44,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836264160] [2024-06-14 14:01:44,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:44,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:01:44,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:44,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:01:44,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:01:44,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:01:44,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 227 transitions, 2930 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:44,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:44,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:01:44,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:44,830 INFO L124 PetriNetUnfolderBase]: 1954/3333 cut-off events. [2024-06-14 14:01:44,830 INFO L125 PetriNetUnfolderBase]: For 141053/141053 co-relation queries the response was YES. [2024-06-14 14:01:44,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20918 conditions, 3333 events. 1954/3333 cut-off events. For 141053/141053 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 20268 event pairs, 496 based on Foata normal form. 2/3330 useless extension candidates. Maximal degree in co-relation 20823. Up to 2931 conditions per place. [2024-06-14 14:01:44,860 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 190 selfloop transitions, 49 changer transitions 0/246 dead transitions. [2024-06-14 14:01:44,860 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 246 transitions, 3623 flow [2024-06-14 14:01:44,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:01:44,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:01:44,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-14 14:01:44,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2024-06-14 14:01:44,861 INFO L175 Difference]: Start difference. First operand has 194 places, 227 transitions, 2930 flow. Second operand 7 states and 161 transitions. [2024-06-14 14:01:44,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 246 transitions, 3623 flow [2024-06-14 14:01:45,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 246 transitions, 3448 flow, removed 42 selfloop flow, removed 4 redundant places. [2024-06-14 14:01:45,116 INFO L231 Difference]: Finished difference. Result has 197 places, 231 transitions, 2942 flow [2024-06-14 14:01:45,116 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2762, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2942, PETRI_PLACES=197, PETRI_TRANSITIONS=231} [2024-06-14 14:01:45,116 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 154 predicate places. [2024-06-14 14:01:45,116 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 231 transitions, 2942 flow [2024-06-14 14:01:45,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:45,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:01:45,117 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:01:45,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-14 14:01:45,117 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:01:45,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:01:45,117 INFO L85 PathProgramCache]: Analyzing trace with hash -215077409, now seen corresponding path program 3 times [2024-06-14 14:01:45,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:01:45,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070517150] [2024-06-14 14:01:45,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:01:45,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:01:45,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:45,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:01:45,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:45,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070517150] [2024-06-14 14:01:45,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070517150] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:45,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:45,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:01:45,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470435191] [2024-06-14 14:01:45,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:45,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:01:45,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:45,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:01:45,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:01:45,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:01:45,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 231 transitions, 2942 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:45,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:45,420 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:01:45,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:45,898 INFO L124 PetriNetUnfolderBase]: 1948/3325 cut-off events. [2024-06-14 14:01:45,899 INFO L125 PetriNetUnfolderBase]: For 143292/143292 co-relation queries the response was YES. [2024-06-14 14:01:45,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20623 conditions, 3325 events. 1948/3325 cut-off events. For 143292/143292 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 20211 event pairs, 494 based on Foata normal form. 2/3322 useless extension candidates. Maximal degree in co-relation 20528. Up to 2810 conditions per place. [2024-06-14 14:01:45,930 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 152 selfloop transitions, 92 changer transitions 0/251 dead transitions. [2024-06-14 14:01:45,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 251 transitions, 3680 flow [2024-06-14 14:01:45,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:01:45,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:01:45,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 241 transitions. [2024-06-14 14:01:45,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5216450216450217 [2024-06-14 14:01:45,931 INFO L175 Difference]: Start difference. First operand has 197 places, 231 transitions, 2942 flow. Second operand 11 states and 241 transitions. [2024-06-14 14:01:45,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 251 transitions, 3680 flow [2024-06-14 14:01:46,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 251 transitions, 3528 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-14 14:01:46,240 INFO L231 Difference]: Finished difference. Result has 203 places, 231 transitions, 2981 flow [2024-06-14 14:01:46,240 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2790, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2981, PETRI_PLACES=203, PETRI_TRANSITIONS=231} [2024-06-14 14:01:46,240 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 160 predicate places. [2024-06-14 14:01:46,241 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 231 transitions, 2981 flow [2024-06-14 14:01:46,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:46,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:01:46,241 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:01:46,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-14 14:01:46,241 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:01:46,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:01:46,242 INFO L85 PathProgramCache]: Analyzing trace with hash -821751023, now seen corresponding path program 4 times [2024-06-14 14:01:46,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:01:46,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421438046] [2024-06-14 14:01:46,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:01:46,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:01:46,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:46,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:01:46,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:46,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421438046] [2024-06-14 14:01:46,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421438046] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:46,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:46,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:01:46,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423981594] [2024-06-14 14:01:46,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:46,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:01:46,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:46,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:01:46,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:01:46,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:01:46,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 231 transitions, 2981 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:46,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:46,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:01:46,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:47,057 INFO L124 PetriNetUnfolderBase]: 1963/3357 cut-off events. [2024-06-14 14:01:47,058 INFO L125 PetriNetUnfolderBase]: For 149433/149433 co-relation queries the response was YES. [2024-06-14 14:01:47,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20948 conditions, 3357 events. 1963/3357 cut-off events. For 149433/149433 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 20535 event pairs, 491 based on Foata normal form. 3/3357 useless extension candidates. Maximal degree in co-relation 20853. Up to 2837 conditions per place. [2024-06-14 14:01:47,086 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 157 selfloop transitions, 90 changer transitions 0/254 dead transitions. [2024-06-14 14:01:47,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 254 transitions, 3823 flow [2024-06-14 14:01:47,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:01:47,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:01:47,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-14 14:01:47,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5782312925170068 [2024-06-14 14:01:47,087 INFO L175 Difference]: Start difference. First operand has 203 places, 231 transitions, 2981 flow. Second operand 7 states and 170 transitions. [2024-06-14 14:01:47,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 254 transitions, 3823 flow [2024-06-14 14:01:47,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 254 transitions, 3580 flow, removed 20 selfloop flow, removed 9 redundant places. [2024-06-14 14:01:47,327 INFO L231 Difference]: Finished difference. Result has 201 places, 238 transitions, 3033 flow [2024-06-14 14:01:47,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2744, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3033, PETRI_PLACES=201, PETRI_TRANSITIONS=238} [2024-06-14 14:01:47,327 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 158 predicate places. [2024-06-14 14:01:47,327 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 238 transitions, 3033 flow [2024-06-14 14:01:47,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:47,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:01:47,328 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:01:47,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-14 14:01:47,328 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:01:47,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:01:47,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1683604363, now seen corresponding path program 5 times [2024-06-14 14:01:47,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:01:47,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135255435] [2024-06-14 14:01:47,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:01:47,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:01:47,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:47,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:01:47,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:47,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135255435] [2024-06-14 14:01:47,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135255435] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:47,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:47,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:01:47,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709278355] [2024-06-14 14:01:47,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:47,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:01:47,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:47,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:01:47,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:01:47,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:01:47,568 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 238 transitions, 3033 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:47,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:47,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:01:47,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:48,015 INFO L124 PetriNetUnfolderBase]: 1956/3349 cut-off events. [2024-06-14 14:01:48,015 INFO L125 PetriNetUnfolderBase]: For 149502/149502 co-relation queries the response was YES. [2024-06-14 14:01:48,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20738 conditions, 3349 events. 1956/3349 cut-off events. For 149502/149502 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 20485 event pairs, 494 based on Foata normal form. 3/3349 useless extension candidates. Maximal degree in co-relation 20642. Up to 2832 conditions per place. [2024-06-14 14:01:48,045 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 161 selfloop transitions, 87 changer transitions 0/255 dead transitions. [2024-06-14 14:01:48,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 255 transitions, 3677 flow [2024-06-14 14:01:48,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:01:48,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:01:48,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-14 14:01:48,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6031746031746031 [2024-06-14 14:01:48,046 INFO L175 Difference]: Start difference. First operand has 201 places, 238 transitions, 3033 flow. Second operand 6 states and 152 transitions. [2024-06-14 14:01:48,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 255 transitions, 3677 flow [2024-06-14 14:01:48,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 255 transitions, 3485 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-14 14:01:48,280 INFO L231 Difference]: Finished difference. Result has 203 places, 238 transitions, 3028 flow [2024-06-14 14:01:48,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2841, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3028, PETRI_PLACES=203, PETRI_TRANSITIONS=238} [2024-06-14 14:01:48,281 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 160 predicate places. [2024-06-14 14:01:48,281 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 238 transitions, 3028 flow [2024-06-14 14:01:48,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:48,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:01:48,282 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:01:48,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-14 14:01:48,282 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:01:48,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:01:48,282 INFO L85 PathProgramCache]: Analyzing trace with hash 366379209, now seen corresponding path program 1 times [2024-06-14 14:01:48,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:01:48,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623900580] [2024-06-14 14:01:48,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:01:48,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:01:48,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:48,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:01:48,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:48,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623900580] [2024-06-14 14:01:48,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623900580] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:48,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:48,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:01:48,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224955422] [2024-06-14 14:01:48,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:48,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:01:48,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:48,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:01:48,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:01:48,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:01:48,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 238 transitions, 3028 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:48,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:48,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:01:48,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:49,057 INFO L124 PetriNetUnfolderBase]: 1995/3421 cut-off events. [2024-06-14 14:01:49,058 INFO L125 PetriNetUnfolderBase]: For 156920/156920 co-relation queries the response was YES. [2024-06-14 14:01:49,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21459 conditions, 3421 events. 1995/3421 cut-off events. For 156920/156920 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 20954 event pairs, 479 based on Foata normal form. 1/3420 useless extension candidates. Maximal degree in co-relation 21362. Up to 3020 conditions per place. [2024-06-14 14:01:49,087 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 224 selfloop transitions, 48 changer transitions 0/279 dead transitions. [2024-06-14 14:01:49,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 279 transitions, 4142 flow [2024-06-14 14:01:49,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:01:49,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:01:49,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 184 transitions. [2024-06-14 14:01:49,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2024-06-14 14:01:49,088 INFO L175 Difference]: Start difference. First operand has 203 places, 238 transitions, 3028 flow. Second operand 8 states and 184 transitions. [2024-06-14 14:01:49,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 279 transitions, 4142 flow [2024-06-14 14:01:49,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 279 transitions, 3857 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-14 14:01:49,410 INFO L231 Difference]: Finished difference. Result has 206 places, 255 transitions, 3183 flow [2024-06-14 14:01:49,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2761, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3183, PETRI_PLACES=206, PETRI_TRANSITIONS=255} [2024-06-14 14:01:49,411 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 163 predicate places. [2024-06-14 14:01:49,411 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 255 transitions, 3183 flow [2024-06-14 14:01:49,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:49,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:01:49,411 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:01:49,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-14 14:01:49,411 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:01:49,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:01:49,412 INFO L85 PathProgramCache]: Analyzing trace with hash 966528683, now seen corresponding path program 2 times [2024-06-14 14:01:49,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:01:49,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171041593] [2024-06-14 14:01:49,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:01:49,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:01:49,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:49,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:01:49,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:49,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171041593] [2024-06-14 14:01:49,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171041593] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:49,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:49,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:01:49,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208272546] [2024-06-14 14:01:49,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:49,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:01:49,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:49,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:01:49,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:01:49,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:01:49,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 255 transitions, 3183 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:49,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:49,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:01:49,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:50,210 INFO L124 PetriNetUnfolderBase]: 2000/3430 cut-off events. [2024-06-14 14:01:50,210 INFO L125 PetriNetUnfolderBase]: For 161567/161567 co-relation queries the response was YES. [2024-06-14 14:01:50,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21426 conditions, 3430 events. 2000/3430 cut-off events. For 161567/161567 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 21030 event pairs, 479 based on Foata normal form. 1/3429 useless extension candidates. Maximal degree in co-relation 21327. Up to 2851 conditions per place. [2024-06-14 14:01:50,242 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 154 selfloop transitions, 121 changer transitions 0/282 dead transitions. [2024-06-14 14:01:50,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 282 transitions, 3957 flow [2024-06-14 14:01:50,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:01:50,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:01:50,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 225 transitions. [2024-06-14 14:01:50,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2024-06-14 14:01:50,243 INFO L175 Difference]: Start difference. First operand has 206 places, 255 transitions, 3183 flow. Second operand 10 states and 225 transitions. [2024-06-14 14:01:50,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 282 transitions, 3957 flow [2024-06-14 14:01:50,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 282 transitions, 3901 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-14 14:01:50,538 INFO L231 Difference]: Finished difference. Result has 213 places, 258 transitions, 3431 flow [2024-06-14 14:01:50,538 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3127, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3431, PETRI_PLACES=213, PETRI_TRANSITIONS=258} [2024-06-14 14:01:50,538 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 170 predicate places. [2024-06-14 14:01:50,538 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 258 transitions, 3431 flow [2024-06-14 14:01:50,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:50,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:01:50,539 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:01:50,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-14 14:01:50,539 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:01:50,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:01:50,539 INFO L85 PathProgramCache]: Analyzing trace with hash 517477739, now seen corresponding path program 3 times [2024-06-14 14:01:50,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:01:50,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753417725] [2024-06-14 14:01:50,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:01:50,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:01:50,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:50,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:01:50,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:50,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753417725] [2024-06-14 14:01:50,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753417725] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:50,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:50,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:01:50,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368026484] [2024-06-14 14:01:50,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:50,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:01:50,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:50,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:01:50,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:01:50,775 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:01:50,776 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 258 transitions, 3431 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:50,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:50,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:01:50,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:51,352 INFO L124 PetriNetUnfolderBase]: 1991/3416 cut-off events. [2024-06-14 14:01:51,352 INFO L125 PetriNetUnfolderBase]: For 165293/165293 co-relation queries the response was YES. [2024-06-14 14:01:51,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21566 conditions, 3416 events. 1991/3416 cut-off events. For 165293/165293 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 20923 event pairs, 475 based on Foata normal form. 3/3416 useless extension candidates. Maximal degree in co-relation 21465. Up to 2993 conditions per place. [2024-06-14 14:01:51,385 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 220 selfloop transitions, 53 changer transitions 0/280 dead transitions. [2024-06-14 14:01:51,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 280 transitions, 4033 flow [2024-06-14 14:01:51,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:01:51,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:01:51,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-14 14:01:51,388 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-14 14:01:51,388 INFO L175 Difference]: Start difference. First operand has 213 places, 258 transitions, 3431 flow. Second operand 6 states and 156 transitions. [2024-06-14 14:01:51,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 280 transitions, 4033 flow [2024-06-14 14:01:51,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 280 transitions, 3743 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-14 14:01:51,667 INFO L231 Difference]: Finished difference. Result has 212 places, 258 transitions, 3270 flow [2024-06-14 14:01:51,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3141, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3270, PETRI_PLACES=212, PETRI_TRANSITIONS=258} [2024-06-14 14:01:51,667 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 169 predicate places. [2024-06-14 14:01:51,667 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 258 transitions, 3270 flow [2024-06-14 14:01:51,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:51,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:01:51,668 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:01:51,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-14 14:01:51,668 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:01:51,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:01:51,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1565055403, now seen corresponding path program 4 times [2024-06-14 14:01:51,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:01:51,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849537629] [2024-06-14 14:01:51,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:01:51,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:01:51,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:51,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:01:51,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:51,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849537629] [2024-06-14 14:01:51,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849537629] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:51,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:51,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:01:51,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105170002] [2024-06-14 14:01:51,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:51,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:01:51,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:51,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:01:51,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:01:51,934 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:01:51,934 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 258 transitions, 3270 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:51,934 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:51,934 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:01:51,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:52,408 INFO L124 PetriNetUnfolderBase]: 1988/3399 cut-off events. [2024-06-14 14:01:52,409 INFO L125 PetriNetUnfolderBase]: For 165835/165835 co-relation queries the response was YES. [2024-06-14 14:01:52,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21347 conditions, 3399 events. 1988/3399 cut-off events. For 165835/165835 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 20799 event pairs, 494 based on Foata normal form. 1/3395 useless extension candidates. Maximal degree in co-relation 21245. Up to 2842 conditions per place. [2024-06-14 14:01:52,440 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 163 selfloop transitions, 109 changer transitions 0/279 dead transitions. [2024-06-14 14:01:52,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 279 transitions, 3978 flow [2024-06-14 14:01:52,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:01:52,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:01:52,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 219 transitions. [2024-06-14 14:01:52,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5214285714285715 [2024-06-14 14:01:52,442 INFO L175 Difference]: Start difference. First operand has 212 places, 258 transitions, 3270 flow. Second operand 10 states and 219 transitions. [2024-06-14 14:01:52,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 279 transitions, 3978 flow [2024-06-14 14:01:52,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 279 transitions, 3838 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-14 14:01:52,804 INFO L231 Difference]: Finished difference. Result has 216 places, 258 transitions, 3356 flow [2024-06-14 14:01:52,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3132, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3356, PETRI_PLACES=216, PETRI_TRANSITIONS=258} [2024-06-14 14:01:52,805 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 173 predicate places. [2024-06-14 14:01:52,805 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 258 transitions, 3356 flow [2024-06-14 14:01:52,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:52,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:01:52,806 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:01:52,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-14 14:01:52,806 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:01:52,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:01:52,806 INFO L85 PathProgramCache]: Analyzing trace with hash -682965045, now seen corresponding path program 5 times [2024-06-14 14:01:52,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:01:52,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581223361] [2024-06-14 14:01:52,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:01:52,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:01:52,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:53,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:01:53,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:53,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581223361] [2024-06-14 14:01:53,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581223361] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:53,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:53,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:01:53,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928694609] [2024-06-14 14:01:53,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:53,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:01:53,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:53,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:01:53,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:01:53,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:01:53,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 258 transitions, 3356 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:53,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:53,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:01:53,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:53,566 INFO L124 PetriNetUnfolderBase]: 1985/3406 cut-off events. [2024-06-14 14:01:53,566 INFO L125 PetriNetUnfolderBase]: For 164840/164844 co-relation queries the response was YES. [2024-06-14 14:01:53,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21413 conditions, 3406 events. 1985/3406 cut-off events. For 164840/164844 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 20924 event pairs, 490 based on Foata normal form. 5/3409 useless extension candidates. Maximal degree in co-relation 21311. Up to 3008 conditions per place. [2024-06-14 14:01:53,593 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 231 selfloop transitions, 39 changer transitions 0/277 dead transitions. [2024-06-14 14:01:53,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 277 transitions, 4056 flow [2024-06-14 14:01:53,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:01:53,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:01:53,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-14 14:01:53,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2024-06-14 14:01:53,595 INFO L175 Difference]: Start difference. First operand has 216 places, 258 transitions, 3356 flow. Second operand 8 states and 180 transitions. [2024-06-14 14:01:53,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 277 transitions, 4056 flow [2024-06-14 14:01:53,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 277 transitions, 3929 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-14 14:01:53,914 INFO L231 Difference]: Finished difference. Result has 219 places, 258 transitions, 3313 flow [2024-06-14 14:01:53,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3229, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3313, PETRI_PLACES=219, PETRI_TRANSITIONS=258} [2024-06-14 14:01:53,915 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 176 predicate places. [2024-06-14 14:01:53,915 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 258 transitions, 3313 flow [2024-06-14 14:01:53,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:53,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:01:53,915 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:01:53,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-14 14:01:53,916 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:01:53,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:01:53,916 INFO L85 PathProgramCache]: Analyzing trace with hash -179690879, now seen corresponding path program 6 times [2024-06-14 14:01:53,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:01:53,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407152877] [2024-06-14 14:01:53,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:01:53,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:01:53,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:54,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:01:54,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:54,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407152877] [2024-06-14 14:01:54,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407152877] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:54,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:54,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:01:54,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465340424] [2024-06-14 14:01:54,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:54,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:01:54,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:54,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:01:54,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:01:54,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:01:54,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 258 transitions, 3313 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:54,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:54,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:01:54,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:54,643 INFO L124 PetriNetUnfolderBase]: 1977/3394 cut-off events. [2024-06-14 14:01:54,644 INFO L125 PetriNetUnfolderBase]: For 168014/168018 co-relation queries the response was YES. [2024-06-14 14:01:54,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21146 conditions, 3394 events. 1977/3394 cut-off events. For 168014/168018 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 20871 event pairs, 490 based on Foata normal form. 6/3398 useless extension candidates. Maximal degree in co-relation 21043. Up to 2832 conditions per place. [2024-06-14 14:01:54,676 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 170 selfloop transitions, 97 changer transitions 0/274 dead transitions. [2024-06-14 14:01:54,676 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 274 transitions, 4001 flow [2024-06-14 14:01:54,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:01:54,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:01:54,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-14 14:01:54,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-06-14 14:01:54,677 INFO L175 Difference]: Start difference. First operand has 219 places, 258 transitions, 3313 flow. Second operand 8 states and 182 transitions. [2024-06-14 14:01:54,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 274 transitions, 4001 flow [2024-06-14 14:01:55,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 274 transitions, 3849 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-14 14:01:55,058 INFO L231 Difference]: Finished difference. Result has 220 places, 258 transitions, 3363 flow [2024-06-14 14:01:55,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3161, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3363, PETRI_PLACES=220, PETRI_TRANSITIONS=258} [2024-06-14 14:01:55,059 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 177 predicate places. [2024-06-14 14:01:55,059 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 258 transitions, 3363 flow [2024-06-14 14:01:55,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:55,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:01:55,060 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:01:55,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-14 14:01:55,060 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:01:55,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:01:55,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1896211429, now seen corresponding path program 7 times [2024-06-14 14:01:55,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:01:55,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276232887] [2024-06-14 14:01:55,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:01:55,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:01:55,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:55,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:01:55,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:55,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276232887] [2024-06-14 14:01:55,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276232887] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:55,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:55,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:01:55,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901133541] [2024-06-14 14:01:55,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:55,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:01:55,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:55,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:01:55,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:01:55,396 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:01:55,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 258 transitions, 3363 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:55,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:55,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:01:55,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:55,993 INFO L124 PetriNetUnfolderBase]: 1987/3401 cut-off events. [2024-06-14 14:01:55,993 INFO L125 PetriNetUnfolderBase]: For 174132/174132 co-relation queries the response was YES. [2024-06-14 14:01:56,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21385 conditions, 3401 events. 1987/3401 cut-off events. For 174132/174132 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 20901 event pairs, 494 based on Foata normal form. 2/3398 useless extension candidates. Maximal degree in co-relation 21282. Up to 2972 conditions per place. [2024-06-14 14:01:56,031 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 211 selfloop transitions, 61 changer transitions 0/279 dead transitions. [2024-06-14 14:01:56,031 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 279 transitions, 4135 flow [2024-06-14 14:01:56,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:01:56,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:01:56,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 199 transitions. [2024-06-14 14:01:56,032 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5264550264550265 [2024-06-14 14:01:56,032 INFO L175 Difference]: Start difference. First operand has 220 places, 258 transitions, 3363 flow. Second operand 9 states and 199 transitions. [2024-06-14 14:01:56,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 279 transitions, 4135 flow [2024-06-14 14:01:56,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 279 transitions, 3947 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-14 14:01:56,427 INFO L231 Difference]: Finished difference. Result has 223 places, 262 transitions, 3374 flow [2024-06-14 14:01:56,428 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3181, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3374, PETRI_PLACES=223, PETRI_TRANSITIONS=262} [2024-06-14 14:01:56,428 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 180 predicate places. [2024-06-14 14:01:56,428 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 262 transitions, 3374 flow [2024-06-14 14:01:56,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:56,428 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:01:56,429 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:01:56,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-14 14:01:56,429 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:01:56,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:01:56,429 INFO L85 PathProgramCache]: Analyzing trace with hash -730332805, now seen corresponding path program 8 times [2024-06-14 14:01:56,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:01:56,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87177588] [2024-06-14 14:01:56,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:01:56,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:01:56,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:56,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:01:56,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:56,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87177588] [2024-06-14 14:01:56,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87177588] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:56,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:56,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:01:56,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134924248] [2024-06-14 14:01:56,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:56,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:01:56,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:56,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:01:56,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:01:56,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:01:56,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 262 transitions, 3374 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:56,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:56,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:01:56,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:57,270 INFO L124 PetriNetUnfolderBase]: 1979/3389 cut-off events. [2024-06-14 14:01:57,271 INFO L125 PetriNetUnfolderBase]: For 175304/175304 co-relation queries the response was YES. [2024-06-14 14:01:57,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21159 conditions, 3389 events. 1979/3389 cut-off events. For 175304/175304 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 20763 event pairs, 494 based on Foata normal form. 2/3386 useless extension candidates. Maximal degree in co-relation 21054. Up to 2834 conditions per place. [2024-06-14 14:01:57,307 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 166 selfloop transitions, 106 changer transitions 0/279 dead transitions. [2024-06-14 14:01:57,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 279 transitions, 4078 flow [2024-06-14 14:01:57,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:01:57,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:01:57,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 202 transitions. [2024-06-14 14:01:57,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5343915343915344 [2024-06-14 14:01:57,308 INFO L175 Difference]: Start difference. First operand has 223 places, 262 transitions, 3374 flow. Second operand 9 states and 202 transitions. [2024-06-14 14:01:57,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 279 transitions, 4078 flow [2024-06-14 14:01:57,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 279 transitions, 3824 flow, removed 28 selfloop flow, removed 8 redundant places. [2024-06-14 14:01:57,743 INFO L231 Difference]: Finished difference. Result has 224 places, 262 transitions, 3341 flow [2024-06-14 14:01:57,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3120, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3341, PETRI_PLACES=224, PETRI_TRANSITIONS=262} [2024-06-14 14:01:57,744 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 181 predicate places. [2024-06-14 14:01:57,744 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 262 transitions, 3341 flow [2024-06-14 14:01:57,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:57,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:01:57,745 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:01:57,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-14 14:01:57,745 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:01:57,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:01:57,746 INFO L85 PathProgramCache]: Analyzing trace with hash 346780173, now seen corresponding path program 9 times [2024-06-14 14:01:57,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:01:57,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31793556] [2024-06-14 14:01:57,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:01:57,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:01:57,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:57,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:01:57,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:57,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31793556] [2024-06-14 14:01:57,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31793556] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:57,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:57,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:01:57,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024952816] [2024-06-14 14:01:57,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:57,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:01:57,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:57,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:01:57,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:01:58,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:01:58,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 262 transitions, 3341 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:58,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:58,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:01:58,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:58,530 INFO L124 PetriNetUnfolderBase]: 1989/3420 cut-off events. [2024-06-14 14:01:58,530 INFO L125 PetriNetUnfolderBase]: For 179201/179201 co-relation queries the response was YES. [2024-06-14 14:01:58,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21433 conditions, 3420 events. 1989/3420 cut-off events. For 179201/179201 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 21018 event pairs, 475 based on Foata normal form. 2/3419 useless extension candidates. Maximal degree in co-relation 21327. Up to 2863 conditions per place. [2024-06-14 14:01:58,566 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 180 selfloop transitions, 106 changer transitions 0/293 dead transitions. [2024-06-14 14:01:58,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 293 transitions, 4193 flow [2024-06-14 14:01:58,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:01:58,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:01:58,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-14 14:01:58,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6258503401360545 [2024-06-14 14:01:58,567 INFO L175 Difference]: Start difference. First operand has 224 places, 262 transitions, 3341 flow. Second operand 7 states and 184 transitions. [2024-06-14 14:01:58,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 293 transitions, 4193 flow [2024-06-14 14:01:59,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 293 transitions, 3975 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-14 14:01:59,086 INFO L231 Difference]: Finished difference. Result has 223 places, 266 transitions, 3457 flow [2024-06-14 14:01:59,086 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3129, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3457, PETRI_PLACES=223, PETRI_TRANSITIONS=266} [2024-06-14 14:01:59,087 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 180 predicate places. [2024-06-14 14:01:59,087 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 266 transitions, 3457 flow [2024-06-14 14:01:59,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:59,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:01:59,087 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:01:59,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-14 14:01:59,087 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:01:59,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:01:59,088 INFO L85 PathProgramCache]: Analyzing trace with hash -652141431, now seen corresponding path program 10 times [2024-06-14 14:01:59,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:01:59,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500066055] [2024-06-14 14:01:59,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:01:59,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:01:59,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:59,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:01:59,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:59,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500066055] [2024-06-14 14:01:59,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500066055] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:59,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:59,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:01:59,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340692511] [2024-06-14 14:01:59,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:59,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:01:59,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:59,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:01:59,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:01:59,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:01:59,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 266 transitions, 3457 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:59,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:59,370 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:01:59,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:59,841 INFO L124 PetriNetUnfolderBase]: 1981/3400 cut-off events. [2024-06-14 14:01:59,841 INFO L125 PetriNetUnfolderBase]: For 180677/180677 co-relation queries the response was YES. [2024-06-14 14:01:59,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21351 conditions, 3400 events. 1981/3400 cut-off events. For 180677/180677 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 20903 event pairs, 494 based on Foata normal form. 2/3399 useless extension candidates. Maximal degree in co-relation 21244. Up to 2855 conditions per place. [2024-06-14 14:01:59,876 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 184 selfloop transitions, 94 changer transitions 0/285 dead transitions. [2024-06-14 14:01:59,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 285 transitions, 4061 flow [2024-06-14 14:01:59,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:01:59,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:01:59,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-14 14:01:59,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-06-14 14:01:59,877 INFO L175 Difference]: Start difference. First operand has 223 places, 266 transitions, 3457 flow. Second operand 6 states and 154 transitions. [2024-06-14 14:01:59,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 285 transitions, 4061 flow [2024-06-14 14:02:00,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 285 transitions, 3774 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-14 14:02:00,341 INFO L231 Difference]: Finished difference. Result has 222 places, 266 transitions, 3371 flow [2024-06-14 14:02:00,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3170, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3371, PETRI_PLACES=222, PETRI_TRANSITIONS=266} [2024-06-14 14:02:00,342 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 179 predicate places. [2024-06-14 14:02:00,342 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 266 transitions, 3371 flow [2024-06-14 14:02:00,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:00,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:02:00,342 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:02:00,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-14 14:02:00,342 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:02:00,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:02:00,343 INFO L85 PathProgramCache]: Analyzing trace with hash -430718847, now seen corresponding path program 1 times [2024-06-14 14:02:00,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:02:00,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994219649] [2024-06-14 14:02:00,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:02:00,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:02:00,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:02:00,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:02:00,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:02:00,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994219649] [2024-06-14 14:02:00,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994219649] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:02:00,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:02:00,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:02:00,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880023866] [2024-06-14 14:02:00,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:02:00,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:02:00,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:02:00,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:02:00,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:02:00,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-14 14:02:00,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 266 transitions, 3371 flow. Second operand has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:00,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:02:00,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-14 14:02:00,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:02:01,073 INFO L124 PetriNetUnfolderBase]: 1915/3336 cut-off events. [2024-06-14 14:02:01,073 INFO L125 PetriNetUnfolderBase]: For 185285/185285 co-relation queries the response was YES. [2024-06-14 14:02:01,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20791 conditions, 3336 events. 1915/3336 cut-off events. For 185285/185285 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 20757 event pairs, 347 based on Foata normal form. 7/3321 useless extension candidates. Maximal degree in co-relation 20685. Up to 2758 conditions per place. [2024-06-14 14:02:01,109 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 217 selfloop transitions, 26 changer transitions 1/289 dead transitions. [2024-06-14 14:02:01,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 289 transitions, 3939 flow [2024-06-14 14:02:01,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 14:02:01,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 14:02:01,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 135 transitions. [2024-06-14 14:02:01,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2024-06-14 14:02:01,110 INFO L175 Difference]: Start difference. First operand has 222 places, 266 transitions, 3371 flow. Second operand 5 states and 135 transitions. [2024-06-14 14:02:01,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 289 transitions, 3939 flow [2024-06-14 14:02:01,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 289 transitions, 3654 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-14 14:02:01,601 INFO L231 Difference]: Finished difference. Result has 220 places, 267 transitions, 3160 flow [2024-06-14 14:02:01,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3086, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3160, PETRI_PLACES=220, PETRI_TRANSITIONS=267} [2024-06-14 14:02:01,601 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 177 predicate places. [2024-06-14 14:02:01,601 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 267 transitions, 3160 flow [2024-06-14 14:02:01,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:01,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:02:01,602 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:02:01,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-14 14:02:01,602 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:02:01,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:02:01,602 INFO L85 PathProgramCache]: Analyzing trace with hash -415481727, now seen corresponding path program 2 times [2024-06-14 14:02:01,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:02:01,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655184200] [2024-06-14 14:02:01,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:02:01,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:02:01,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:02:01,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:02:01,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:02:01,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655184200] [2024-06-14 14:02:01,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655184200] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:02:01,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:02:01,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:02:01,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196636512] [2024-06-14 14:02:01,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:02:01,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:02:01,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:02:01,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:02:01,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:02:01,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-14 14:02:01,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 267 transitions, 3160 flow. Second operand has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:01,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:02:01,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-14 14:02:01,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:02:02,324 INFO L124 PetriNetUnfolderBase]: 1917/3339 cut-off events. [2024-06-14 14:02:02,324 INFO L125 PetriNetUnfolderBase]: For 177161/177161 co-relation queries the response was YES. [2024-06-14 14:02:02,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20341 conditions, 3339 events. 1917/3339 cut-off events. For 177161/177161 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 20904 event pairs, 337 based on Foata normal form. 8/3327 useless extension candidates. Maximal degree in co-relation 20235. Up to 2657 conditions per place. [2024-06-14 14:02:02,358 INFO L140 encePairwiseOnDemand]: 36/42 looper letters, 221 selfloop transitions, 22 changer transitions 0/288 dead transitions. [2024-06-14 14:02:02,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 288 transitions, 3850 flow [2024-06-14 14:02:02,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 14:02:02,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 14:02:02,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 129 transitions. [2024-06-14 14:02:02,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6142857142857143 [2024-06-14 14:02:02,359 INFO L175 Difference]: Start difference. First operand has 220 places, 267 transitions, 3160 flow. Second operand 5 states and 129 transitions. [2024-06-14 14:02:02,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 288 transitions, 3850 flow [2024-06-14 14:02:02,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 288 transitions, 3802 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-14 14:02:02,793 INFO L231 Difference]: Finished difference. Result has 222 places, 268 transitions, 3172 flow [2024-06-14 14:02:02,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3112, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3172, PETRI_PLACES=222, PETRI_TRANSITIONS=268} [2024-06-14 14:02:02,793 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 179 predicate places. [2024-06-14 14:02:02,793 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 268 transitions, 3172 flow [2024-06-14 14:02:02,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:02,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:02:02,794 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:02:02,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-14 14:02:02,794 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:02:02,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:02:02,794 INFO L85 PathProgramCache]: Analyzing trace with hash 1804209993, now seen corresponding path program 1 times [2024-06-14 14:02:02,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:02:02,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716249832] [2024-06-14 14:02:02,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:02:02,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:02:02,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:02:03,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:02:03,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:02:03,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716249832] [2024-06-14 14:02:03,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716249832] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:02:03,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:02:03,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:02:03,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435206113] [2024-06-14 14:02:03,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:02:03,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:02:03,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:02:03,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:02:03,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:02:03,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:02:03,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 268 transitions, 3172 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:03,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:02:03,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:02:03,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:02:03,597 INFO L124 PetriNetUnfolderBase]: 2019/3477 cut-off events. [2024-06-14 14:02:03,598 INFO L125 PetriNetUnfolderBase]: For 172198/172202 co-relation queries the response was YES. [2024-06-14 14:02:03,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21152 conditions, 3477 events. 2019/3477 cut-off events. For 172198/172202 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 21480 event pairs, 450 based on Foata normal form. 6/3482 useless extension candidates. Maximal degree in co-relation 21045. Up to 3098 conditions per place. [2024-06-14 14:02:03,635 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 254 selfloop transitions, 32 changer transitions 0/293 dead transitions. [2024-06-14 14:02:03,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 293 transitions, 4014 flow [2024-06-14 14:02:03,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:02:03,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:02:03,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 177 transitions. [2024-06-14 14:02:03,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5267857142857143 [2024-06-14 14:02:03,636 INFO L175 Difference]: Start difference. First operand has 222 places, 268 transitions, 3172 flow. Second operand 8 states and 177 transitions. [2024-06-14 14:02:03,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 293 transitions, 4014 flow [2024-06-14 14:02:04,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 293 transitions, 3976 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-14 14:02:04,006 INFO L231 Difference]: Finished difference. Result has 228 places, 272 transitions, 3303 flow [2024-06-14 14:02:04,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3134, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3303, PETRI_PLACES=228, PETRI_TRANSITIONS=272} [2024-06-14 14:02:04,006 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 185 predicate places. [2024-06-14 14:02:04,007 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 272 transitions, 3303 flow [2024-06-14 14:02:04,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:04,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:02:04,007 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:02:04,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-14 14:02:04,007 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:02:04,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:02:04,008 INFO L85 PathProgramCache]: Analyzing trace with hash -290503479, now seen corresponding path program 2 times [2024-06-14 14:02:04,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:02:04,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676528509] [2024-06-14 14:02:04,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:02:04,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:02:04,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:02:04,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:02:04,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:02:04,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676528509] [2024-06-14 14:02:04,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676528509] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:02:04,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:02:04,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:02:04,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107075521] [2024-06-14 14:02:04,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:02:04,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:02:04,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:02:04,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:02:04,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:02:04,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:02:04,304 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 272 transitions, 3303 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:04,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:02:04,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:02:04,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:02:04,989 INFO L124 PetriNetUnfolderBase]: 2027/3489 cut-off events. [2024-06-14 14:02:04,989 INFO L125 PetriNetUnfolderBase]: For 177962/177966 co-relation queries the response was YES. [2024-06-14 14:02:05,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21332 conditions, 3489 events. 2027/3489 cut-off events. For 177962/177966 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 21566 event pairs, 481 based on Foata normal form. 6/3494 useless extension candidates. Maximal degree in co-relation 21224. Up to 3143 conditions per place. [2024-06-14 14:02:05,021 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 255 selfloop transitions, 28 changer transitions 0/290 dead transitions. [2024-06-14 14:02:05,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 290 transitions, 3959 flow [2024-06-14 14:02:05,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:02:05,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:02:05,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 172 transitions. [2024-06-14 14:02:05,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5119047619047619 [2024-06-14 14:02:05,022 INFO L175 Difference]: Start difference. First operand has 228 places, 272 transitions, 3303 flow. Second operand 8 states and 172 transitions. [2024-06-14 14:02:05,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 290 transitions, 3959 flow [2024-06-14 14:02:05,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 290 transitions, 3851 flow, removed 42 selfloop flow, removed 3 redundant places. [2024-06-14 14:02:05,478 INFO L231 Difference]: Finished difference. Result has 233 places, 274 transitions, 3312 flow [2024-06-14 14:02:05,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3213, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3312, PETRI_PLACES=233, PETRI_TRANSITIONS=274} [2024-06-14 14:02:05,479 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 190 predicate places. [2024-06-14 14:02:05,479 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 274 transitions, 3312 flow [2024-06-14 14:02:05,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:05,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:02:05,479 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:02:05,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-14 14:02:05,479 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:02:05,480 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:02:05,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1895934599, now seen corresponding path program 3 times [2024-06-14 14:02:05,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:02:05,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665707600] [2024-06-14 14:02:05,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:02:05,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:02:05,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:02:05,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:02:05,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:02:05,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665707600] [2024-06-14 14:02:05,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665707600] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:02:05,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:02:05,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:02:05,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217877946] [2024-06-14 14:02:05,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:02:05,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:02:05,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:02:05,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:02:05,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:02:05,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:02:05,810 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 274 transitions, 3312 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:05,810 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:02:05,810 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:02:05,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:02:06,326 INFO L124 PetriNetUnfolderBase]: 2035/3497 cut-off events. [2024-06-14 14:02:06,326 INFO L125 PetriNetUnfolderBase]: For 182363/182363 co-relation queries the response was YES. [2024-06-14 14:02:06,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21299 conditions, 3497 events. 2035/3497 cut-off events. For 182363/182363 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 21544 event pairs, 481 based on Foata normal form. 2/3497 useless extension candidates. Maximal degree in co-relation 21190. Up to 3167 conditions per place. [2024-06-14 14:02:06,360 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 266 selfloop transitions, 18 changer transitions 0/291 dead transitions. [2024-06-14 14:02:06,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 291 transitions, 3954 flow [2024-06-14 14:02:06,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:02:06,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:02:06,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 153 transitions. [2024-06-14 14:02:06,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5204081632653061 [2024-06-14 14:02:06,361 INFO L175 Difference]: Start difference. First operand has 233 places, 274 transitions, 3312 flow. Second operand 7 states and 153 transitions. [2024-06-14 14:02:06,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 291 transitions, 3954 flow [2024-06-14 14:02:06,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 291 transitions, 3871 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-14 14:02:06,760 INFO L231 Difference]: Finished difference. Result has 234 places, 276 transitions, 3312 flow [2024-06-14 14:02:06,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3229, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3312, PETRI_PLACES=234, PETRI_TRANSITIONS=276} [2024-06-14 14:02:06,761 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 191 predicate places. [2024-06-14 14:02:06,761 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 276 transitions, 3312 flow [2024-06-14 14:02:06,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:06,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:02:06,761 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:02:06,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-14 14:02:06,762 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:02:06,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:02:06,762 INFO L85 PathProgramCache]: Analyzing trace with hash -1536146493, now seen corresponding path program 1 times [2024-06-14 14:02:06,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:02:06,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307748863] [2024-06-14 14:02:06,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:02:06,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:02:06,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:02:07,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:02:07,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:02:07,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307748863] [2024-06-14 14:02:07,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307748863] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:02:07,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:02:07,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:02:07,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500839506] [2024-06-14 14:02:07,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:02:07,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:02:07,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:02:07,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:02:07,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:02:07,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:02:07,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 276 transitions, 3312 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:07,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:02:07,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:02:07,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:02:07,665 INFO L124 PetriNetUnfolderBase]: 2051/3509 cut-off events. [2024-06-14 14:02:07,665 INFO L125 PetriNetUnfolderBase]: For 193354/193354 co-relation queries the response was YES. [2024-06-14 14:02:07,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21537 conditions, 3509 events. 2051/3509 cut-off events. For 193354/193354 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 21595 event pairs, 500 based on Foata normal form. 4/3508 useless extension candidates. Maximal degree in co-relation 21427. Up to 2934 conditions per place. [2024-06-14 14:02:07,700 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 176 selfloop transitions, 113 changer transitions 0/296 dead transitions. [2024-06-14 14:02:07,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 296 transitions, 3994 flow [2024-06-14 14:02:07,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:02:07,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:02:07,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 200 transitions. [2024-06-14 14:02:07,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5291005291005291 [2024-06-14 14:02:07,701 INFO L175 Difference]: Start difference. First operand has 234 places, 276 transitions, 3312 flow. Second operand 9 states and 200 transitions. [2024-06-14 14:02:07,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 296 transitions, 3994 flow [2024-06-14 14:02:08,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 296 transitions, 3931 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-14 14:02:08,336 INFO L231 Difference]: Finished difference. Result has 238 places, 279 transitions, 3551 flow [2024-06-14 14:02:08,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3249, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3551, PETRI_PLACES=238, PETRI_TRANSITIONS=279} [2024-06-14 14:02:08,337 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 195 predicate places. [2024-06-14 14:02:08,337 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 279 transitions, 3551 flow [2024-06-14 14:02:08,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:08,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:02:08,337 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:02:08,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-14 14:02:08,337 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:02:08,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:02:08,338 INFO L85 PathProgramCache]: Analyzing trace with hash 347057003, now seen corresponding path program 4 times [2024-06-14 14:02:08,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:02:08,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001933594] [2024-06-14 14:02:08,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:02:08,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:02:08,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:02:08,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:02:08,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:02:08,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001933594] [2024-06-14 14:02:08,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001933594] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:02:08,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:02:08,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:02:08,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296974106] [2024-06-14 14:02:08,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:02:08,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:02:08,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:02:08,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:02:08,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:02:08,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:02:08,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 279 transitions, 3551 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:08,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:02:08,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:02:08,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:02:09,083 INFO L124 PetriNetUnfolderBase]: 2046/3517 cut-off events. [2024-06-14 14:02:09,083 INFO L125 PetriNetUnfolderBase]: For 190561/190561 co-relation queries the response was YES. [2024-06-14 14:02:09,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21832 conditions, 3517 events. 2046/3517 cut-off events. For 190561/190561 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 21705 event pairs, 446 based on Foata normal form. 2/3518 useless extension candidates. Maximal degree in co-relation 21721. Up to 3163 conditions per place. [2024-06-14 14:02:09,116 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 270 selfloop transitions, 22 changer transitions 0/299 dead transitions. [2024-06-14 14:02:09,116 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 299 transitions, 4185 flow [2024-06-14 14:02:09,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:02:09,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:02:09,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-14 14:02:09,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-14 14:02:09,117 INFO L175 Difference]: Start difference. First operand has 238 places, 279 transitions, 3551 flow. Second operand 6 states and 144 transitions. [2024-06-14 14:02:09,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 299 transitions, 4185 flow [2024-06-14 14:02:09,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 299 transitions, 3881 flow, removed 41 selfloop flow, removed 7 redundant places. [2024-06-14 14:02:09,425 INFO L231 Difference]: Finished difference. Result has 237 places, 279 transitions, 3299 flow [2024-06-14 14:02:09,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3247, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3299, PETRI_PLACES=237, PETRI_TRANSITIONS=279} [2024-06-14 14:02:09,426 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 194 predicate places. [2024-06-14 14:02:09,426 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 279 transitions, 3299 flow [2024-06-14 14:02:09,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:09,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:02:09,426 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:02:09,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-14 14:02:09,427 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:02:09,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:02:09,427 INFO L85 PathProgramCache]: Analyzing trace with hash -424045663, now seen corresponding path program 2 times [2024-06-14 14:02:09,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:02:09,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378214828] [2024-06-14 14:02:09,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:02:09,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:02:09,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:02:09,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:02:09,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:02:09,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378214828] [2024-06-14 14:02:09,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378214828] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:02:09,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:02:09,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:02:09,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475041689] [2024-06-14 14:02:09,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:02:09,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:02:09,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:02:09,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:02:09,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:02:09,735 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:02:09,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 279 transitions, 3299 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:09,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:02:09,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:02:09,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:02:10,305 INFO L124 PetriNetUnfolderBase]: 2090/3575 cut-off events. [2024-06-14 14:02:10,305 INFO L125 PetriNetUnfolderBase]: For 219284/219284 co-relation queries the response was YES. [2024-06-14 14:02:10,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22018 conditions, 3575 events. 2090/3575 cut-off events. For 219284/219284 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 22082 event pairs, 504 based on Foata normal form. 12/3584 useless extension candidates. Maximal degree in co-relation 21906. Up to 2982 conditions per place. [2024-06-14 14:02:10,339 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 193 selfloop transitions, 101 changer transitions 0/301 dead transitions. [2024-06-14 14:02:10,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 301 transitions, 4017 flow [2024-06-14 14:02:10,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:02:10,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:02:10,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-14 14:02:10,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5654761904761905 [2024-06-14 14:02:10,341 INFO L175 Difference]: Start difference. First operand has 237 places, 279 transitions, 3299 flow. Second operand 8 states and 190 transitions. [2024-06-14 14:02:10,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 301 transitions, 4017 flow [2024-06-14 14:02:10,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 301 transitions, 3959 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-14 14:02:10,738 INFO L231 Difference]: Finished difference. Result has 240 places, 282 transitions, 3527 flow [2024-06-14 14:02:10,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3241, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3527, PETRI_PLACES=240, PETRI_TRANSITIONS=282} [2024-06-14 14:02:10,738 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 197 predicate places. [2024-06-14 14:02:10,739 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 282 transitions, 3527 flow [2024-06-14 14:02:10,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:10,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:02:10,739 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:02:10,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-14 14:02:10,739 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:02:10,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:02:10,740 INFO L85 PathProgramCache]: Analyzing trace with hash -415474783, now seen corresponding path program 3 times [2024-06-14 14:02:10,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:02:10,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127677748] [2024-06-14 14:02:10,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:02:10,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:02:10,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:02:11,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:02:11,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:02:11,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127677748] [2024-06-14 14:02:11,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127677748] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:02:11,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:02:11,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:02:11,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602511883] [2024-06-14 14:02:11,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:02:11,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:02:11,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:02:11,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:02:11,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:02:11,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:02:11,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 282 transitions, 3527 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:11,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:02:11,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:02:11,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:02:11,786 INFO L124 PetriNetUnfolderBase]: 2432/4131 cut-off events. [2024-06-14 14:02:11,787 INFO L125 PetriNetUnfolderBase]: For 350745/350745 co-relation queries the response was YES. [2024-06-14 14:02:11,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29193 conditions, 4131 events. 2432/4131 cut-off events. For 350745/350745 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 26046 event pairs, 622 based on Foata normal form. 12/4140 useless extension candidates. Maximal degree in co-relation 29080. Up to 2935 conditions per place. [2024-06-14 14:02:11,829 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 203 selfloop transitions, 105 changer transitions 0/315 dead transitions. [2024-06-14 14:02:11,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 315 transitions, 4544 flow [2024-06-14 14:02:11,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:02:11,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:02:11,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-14 14:02:11,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-14 14:02:11,830 INFO L175 Difference]: Start difference. First operand has 240 places, 282 transitions, 3527 flow. Second operand 8 states and 196 transitions. [2024-06-14 14:02:11,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 315 transitions, 4544 flow [2024-06-14 14:02:12,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 315 transitions, 4290 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-14 14:02:12,442 INFO L231 Difference]: Finished difference. Result has 243 places, 288 transitions, 3648 flow [2024-06-14 14:02:12,442 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3273, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3648, PETRI_PLACES=243, PETRI_TRANSITIONS=288} [2024-06-14 14:02:12,442 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 200 predicate places. [2024-06-14 14:02:12,442 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 288 transitions, 3648 flow [2024-06-14 14:02:12,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:12,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:02:12,443 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:02:12,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-14 14:02:12,443 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:02:12,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:02:12,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1065837045, now seen corresponding path program 4 times [2024-06-14 14:02:12,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:02:12,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437187985] [2024-06-14 14:02:12,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:02:12,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:02:12,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:02:12,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:02:12,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:02:12,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437187985] [2024-06-14 14:02:12,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437187985] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:02:12,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:02:12,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:02:12,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195396693] [2024-06-14 14:02:12,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:02:12,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:02:12,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:02:12,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:02:12,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:02:12,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:02:12,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 288 transitions, 3648 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:12,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:02:12,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:02:12,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:02:13,441 INFO L124 PetriNetUnfolderBase]: 2404/4093 cut-off events. [2024-06-14 14:02:13,442 INFO L125 PetriNetUnfolderBase]: For 328702/328702 co-relation queries the response was YES. [2024-06-14 14:02:13,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28147 conditions, 4093 events. 2404/4093 cut-off events. For 328702/328702 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 25850 event pairs, 645 based on Foata normal form. 12/4102 useless extension candidates. Maximal degree in co-relation 28032. Up to 3476 conditions per place. [2024-06-14 14:02:13,485 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 207 selfloop transitions, 98 changer transitions 0/312 dead transitions. [2024-06-14 14:02:13,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 312 transitions, 4408 flow [2024-06-14 14:02:13,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:02:13,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:02:13,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-14 14:02:13,486 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884353741496599 [2024-06-14 14:02:13,486 INFO L175 Difference]: Start difference. First operand has 243 places, 288 transitions, 3648 flow. Second operand 7 states and 173 transitions. [2024-06-14 14:02:13,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 312 transitions, 4408 flow [2024-06-14 14:02:14,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 312 transitions, 4206 flow, removed 39 selfloop flow, removed 4 redundant places. [2024-06-14 14:02:14,251 INFO L231 Difference]: Finished difference. Result has 246 places, 291 transitions, 3740 flow [2024-06-14 14:02:14,252 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3452, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3740, PETRI_PLACES=246, PETRI_TRANSITIONS=291} [2024-06-14 14:02:14,252 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 203 predicate places. [2024-06-14 14:02:14,252 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 291 transitions, 3740 flow [2024-06-14 14:02:14,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:14,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:02:14,252 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:02:14,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-14 14:02:14,253 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:02:14,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:02:14,253 INFO L85 PathProgramCache]: Analyzing trace with hash -973756629, now seen corresponding path program 1 times [2024-06-14 14:02:14,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:02:14,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422814963] [2024-06-14 14:02:14,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:02:14,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:02:14,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:02:14,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:02:14,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:02:14,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422814963] [2024-06-14 14:02:14,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422814963] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:02:14,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:02:14,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:02:14,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391378203] [2024-06-14 14:02:14,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:02:14,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:02:14,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:02:14,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:02:14,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:02:14,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:02:14,648 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 291 transitions, 3740 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:14,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:02:14,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:02:14,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:02:15,495 INFO L124 PetriNetUnfolderBase]: 2417/4123 cut-off events. [2024-06-14 14:02:15,495 INFO L125 PetriNetUnfolderBase]: For 316958/316958 co-relation queries the response was YES. [2024-06-14 14:02:15,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28355 conditions, 4123 events. 2417/4123 cut-off events. For 316958/316958 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 26056 event pairs, 626 based on Foata normal form. 1/4121 useless extension candidates. Maximal degree in co-relation 28238. Up to 3690 conditions per place. [2024-06-14 14:02:15,538 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 280 selfloop transitions, 42 changer transitions 0/329 dead transitions. [2024-06-14 14:02:15,538 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 329 transitions, 4732 flow [2024-06-14 14:02:15,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:02:15,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:02:15,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 213 transitions. [2024-06-14 14:02:15,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5634920634920635 [2024-06-14 14:02:15,539 INFO L175 Difference]: Start difference. First operand has 246 places, 291 transitions, 3740 flow. Second operand 9 states and 213 transitions. [2024-06-14 14:02:15,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 329 transitions, 4732 flow [2024-06-14 14:02:16,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 329 transitions, 4482 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-14 14:02:16,013 INFO L231 Difference]: Finished difference. Result has 251 places, 297 transitions, 3721 flow [2024-06-14 14:02:16,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3490, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3721, PETRI_PLACES=251, PETRI_TRANSITIONS=297} [2024-06-14 14:02:16,014 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 208 predicate places. [2024-06-14 14:02:16,014 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 297 transitions, 3721 flow [2024-06-14 14:02:16,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:16,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:02:16,014 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:02:16,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-14 14:02:16,014 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:02:16,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:02:16,015 INFO L85 PathProgramCache]: Analyzing trace with hash -285503941, now seen corresponding path program 2 times [2024-06-14 14:02:16,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:02:16,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473954645] [2024-06-14 14:02:16,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:02:16,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:02:16,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:02:16,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:02:16,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:02:16,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473954645] [2024-06-14 14:02:16,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473954645] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:02:16,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:02:16,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:02:16,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721988940] [2024-06-14 14:02:16,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:02:16,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:02:16,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:02:16,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:02:16,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:02:16,245 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:02:16,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 297 transitions, 3721 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:16,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:02:16,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:02:16,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:02:16,878 INFO L124 PetriNetUnfolderBase]: 2454/4185 cut-off events. [2024-06-14 14:02:16,879 INFO L125 PetriNetUnfolderBase]: For 336272/336272 co-relation queries the response was YES. [2024-06-14 14:02:16,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29144 conditions, 4185 events. 2454/4185 cut-off events. For 336272/336272 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 26522 event pairs, 627 based on Foata normal form. 1/4184 useless extension candidates. Maximal degree in co-relation 29025. Up to 3298 conditions per place. [2024-06-14 14:02:16,922 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 170 selfloop transitions, 166 changer transitions 0/343 dead transitions. [2024-06-14 14:02:16,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 343 transitions, 5253 flow [2024-06-14 14:02:16,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:02:16,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:02:16,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 254 transitions. [2024-06-14 14:02:16,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5497835497835498 [2024-06-14 14:02:16,923 INFO L175 Difference]: Start difference. First operand has 251 places, 297 transitions, 3721 flow. Second operand 11 states and 254 transitions. [2024-06-14 14:02:16,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 343 transitions, 5253 flow [2024-06-14 14:02:17,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 343 transitions, 5104 flow, removed 50 selfloop flow, removed 5 redundant places. [2024-06-14 14:02:17,713 INFO L231 Difference]: Finished difference. Result has 258 places, 311 transitions, 4211 flow [2024-06-14 14:02:17,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3572, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4211, PETRI_PLACES=258, PETRI_TRANSITIONS=311} [2024-06-14 14:02:17,714 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 215 predicate places. [2024-06-14 14:02:17,714 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 311 transitions, 4211 flow [2024-06-14 14:02:17,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:17,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:02:17,714 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:02:17,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-14 14:02:17,714 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:02:17,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:02:17,715 INFO L85 PathProgramCache]: Analyzing trace with hash -1281955785, now seen corresponding path program 3 times [2024-06-14 14:02:17,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:02:17,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940437915] [2024-06-14 14:02:17,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:02:17,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:02:17,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:02:17,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:02:17,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:02:17,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940437915] [2024-06-14 14:02:17,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940437915] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:02:17,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:02:17,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:02:17,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613558282] [2024-06-14 14:02:17,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:02:17,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:02:17,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:02:17,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:02:17,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:02:17,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:02:17,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 311 transitions, 4211 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:17,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:02:17,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:02:17,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:02:18,588 INFO L124 PetriNetUnfolderBase]: 2459/4198 cut-off events. [2024-06-14 14:02:18,588 INFO L125 PetriNetUnfolderBase]: For 350684/350684 co-relation queries the response was YES. [2024-06-14 14:02:18,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30393 conditions, 4198 events. 2459/4198 cut-off events. For 350684/350684 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 26645 event pairs, 629 based on Foata normal form. 1/4197 useless extension candidates. Maximal degree in co-relation 30271. Up to 3300 conditions per place. [2024-06-14 14:02:18,636 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 169 selfloop transitions, 166 changer transitions 0/342 dead transitions. [2024-06-14 14:02:18,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 342 transitions, 5552 flow [2024-06-14 14:02:18,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:02:18,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:02:18,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 233 transitions. [2024-06-14 14:02:18,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5547619047619048 [2024-06-14 14:02:18,637 INFO L175 Difference]: Start difference. First operand has 258 places, 311 transitions, 4211 flow. Second operand 10 states and 233 transitions. [2024-06-14 14:02:18,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 342 transitions, 5552 flow [2024-06-14 14:02:19,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 342 transitions, 5266 flow, removed 94 selfloop flow, removed 6 redundant places. [2024-06-14 14:02:19,520 INFO L231 Difference]: Finished difference. Result has 262 places, 314 transitions, 4352 flow [2024-06-14 14:02:19,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3951, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4352, PETRI_PLACES=262, PETRI_TRANSITIONS=314} [2024-06-14 14:02:19,521 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 219 predicate places. [2024-06-14 14:02:19,521 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 314 transitions, 4352 flow [2024-06-14 14:02:19,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:19,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:02:19,521 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:02:19,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-14 14:02:19,522 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:02:19,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:02:19,522 INFO L85 PathProgramCache]: Analyzing trace with hash -85845961, now seen corresponding path program 4 times [2024-06-14 14:02:19,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:02:19,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696515690] [2024-06-14 14:02:19,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:02:19,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:02:19,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:02:19,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:02:19,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:02:19,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696515690] [2024-06-14 14:02:19,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696515690] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:02:19,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:02:19,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:02:19,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426861935] [2024-06-14 14:02:19,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:02:19,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:02:19,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:02:19,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:02:19,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:02:19,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:02:19,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 314 transitions, 4352 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:19,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:02:19,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:02:19,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:02:20,545 INFO L124 PetriNetUnfolderBase]: 2480/4226 cut-off events. [2024-06-14 14:02:20,545 INFO L125 PetriNetUnfolderBase]: For 351262/351262 co-relation queries the response was YES. [2024-06-14 14:02:20,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29340 conditions, 4226 events. 2480/4226 cut-off events. For 351262/351262 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 26786 event pairs, 625 based on Foata normal form. 2/4225 useless extension candidates. Maximal degree in co-relation 29218. Up to 3702 conditions per place. [2024-06-14 14:02:20,590 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 274 selfloop transitions, 67 changer transitions 0/348 dead transitions. [2024-06-14 14:02:20,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 348 transitions, 5358 flow [2024-06-14 14:02:20,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:02:20,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:02:20,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-14 14:02:20,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6122448979591837 [2024-06-14 14:02:20,591 INFO L175 Difference]: Start difference. First operand has 262 places, 314 transitions, 4352 flow. Second operand 7 states and 180 transitions. [2024-06-14 14:02:20,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 348 transitions, 5358 flow [2024-06-14 14:02:21,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 348 transitions, 5024 flow, removed 48 selfloop flow, removed 6 redundant places. [2024-06-14 14:02:21,374 INFO L231 Difference]: Finished difference. Result has 264 places, 321 transitions, 4318 flow [2024-06-14 14:02:21,375 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4027, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4318, PETRI_PLACES=264, PETRI_TRANSITIONS=321} [2024-06-14 14:02:21,375 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 221 predicate places. [2024-06-14 14:02:21,375 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 321 transitions, 4318 flow [2024-06-14 14:02:21,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:21,375 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:02:21,375 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:02:21,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-14 14:02:21,375 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:02:21,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:02:21,376 INFO L85 PathProgramCache]: Analyzing trace with hash 432064567, now seen corresponding path program 5 times [2024-06-14 14:02:21,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:02:21,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078909466] [2024-06-14 14:02:21,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:02:21,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:02:21,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:02:21,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:02:21,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:02:21,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078909466] [2024-06-14 14:02:21,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078909466] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:02:21,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:02:21,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:02:21,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872585519] [2024-06-14 14:02:21,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:02:21,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:02:21,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:02:21,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:02:21,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:02:21,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:02:21,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 321 transitions, 4318 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:21,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:02:21,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:02:21,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:02:22,385 INFO L124 PetriNetUnfolderBase]: 2485/4207 cut-off events. [2024-06-14 14:02:22,385 INFO L125 PetriNetUnfolderBase]: For 359215/359215 co-relation queries the response was YES. [2024-06-14 14:02:22,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29332 conditions, 4207 events. 2485/4207 cut-off events. For 359215/359215 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 26641 event pairs, 673 based on Foata normal form. 1/4199 useless extension candidates. Maximal degree in co-relation 29208. Up to 3324 conditions per place. [2024-06-14 14:02:22,430 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 186 selfloop transitions, 165 changer transitions 0/358 dead transitions. [2024-06-14 14:02:22,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 358 transitions, 5791 flow [2024-06-14 14:02:22,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:02:22,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:02:22,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 247 transitions. [2024-06-14 14:02:22,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5346320346320347 [2024-06-14 14:02:22,432 INFO L175 Difference]: Start difference. First operand has 264 places, 321 transitions, 4318 flow. Second operand 11 states and 247 transitions. [2024-06-14 14:02:22,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 358 transitions, 5791 flow [2024-06-14 14:02:23,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 358 transitions, 5689 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-14 14:02:23,062 INFO L231 Difference]: Finished difference. Result has 271 places, 331 transitions, 4819 flow [2024-06-14 14:02:23,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4216, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4819, PETRI_PLACES=271, PETRI_TRANSITIONS=331} [2024-06-14 14:02:23,062 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 228 predicate places. [2024-06-14 14:02:23,062 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 331 transitions, 4819 flow [2024-06-14 14:02:23,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:23,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:02:23,063 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:02:23,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-14 14:02:23,063 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:02:23,063 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:02:23,063 INFO L85 PathProgramCache]: Analyzing trace with hash 442540087, now seen corresponding path program 6 times [2024-06-14 14:02:23,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:02:23,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780623934] [2024-06-14 14:02:23,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:02:23,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:02:23,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:02:23,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:02:23,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:02:23,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780623934] [2024-06-14 14:02:23,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780623934] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:02:23,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:02:23,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:02:23,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216630033] [2024-06-14 14:02:23,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:02:23,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:02:23,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:02:23,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:02:23,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:02:23,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:02:23,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 331 transitions, 4819 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:23,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:02:23,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:02:23,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:02:24,050 INFO L124 PetriNetUnfolderBase]: 2490/4216 cut-off events. [2024-06-14 14:02:24,050 INFO L125 PetriNetUnfolderBase]: For 371137/371137 co-relation queries the response was YES. [2024-06-14 14:02:24,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29931 conditions, 4216 events. 2490/4216 cut-off events. For 371137/371137 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 26708 event pairs, 673 based on Foata normal form. 1/4208 useless extension candidates. Maximal degree in co-relation 29806. Up to 3326 conditions per place. [2024-06-14 14:02:24,092 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 185 selfloop transitions, 165 changer transitions 0/357 dead transitions. [2024-06-14 14:02:24,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 357 transitions, 6119 flow [2024-06-14 14:02:24,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:02:24,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:02:24,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 228 transitions. [2024-06-14 14:02:24,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5428571428571428 [2024-06-14 14:02:24,093 INFO L175 Difference]: Start difference. First operand has 271 places, 331 transitions, 4819 flow. Second operand 10 states and 228 transitions. [2024-06-14 14:02:24,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 357 transitions, 6119 flow [2024-06-14 14:02:24,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 357 transitions, 5872 flow, removed 76 selfloop flow, removed 6 redundant places. [2024-06-14 14:02:24,958 INFO L231 Difference]: Finished difference. Result has 275 places, 334 transitions, 5004 flow [2024-06-14 14:02:24,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4600, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5004, PETRI_PLACES=275, PETRI_TRANSITIONS=334} [2024-06-14 14:02:24,959 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 232 predicate places. [2024-06-14 14:02:24,959 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 334 transitions, 5004 flow [2024-06-14 14:02:24,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:24,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:02:24,959 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:02:24,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-14 14:02:24,959 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:02:24,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:02:24,960 INFO L85 PathProgramCache]: Analyzing trace with hash -390214375, now seen corresponding path program 7 times [2024-06-14 14:02:24,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:02:24,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399969287] [2024-06-14 14:02:24,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:02:24,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:02:24,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:02:25,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:02:25,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:02:25,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399969287] [2024-06-14 14:02:25,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399969287] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:02:25,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:02:25,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:02:25,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446712944] [2024-06-14 14:02:25,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:02:25,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:02:25,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:02:25,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:02:25,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:02:25,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:02:25,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 334 transitions, 5004 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:25,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:02:25,207 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:02:25,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:02:25,835 INFO L124 PetriNetUnfolderBase]: 2508/4247 cut-off events. [2024-06-14 14:02:25,835 INFO L125 PetriNetUnfolderBase]: For 386958/386958 co-relation queries the response was YES. [2024-06-14 14:02:25,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30623 conditions, 4247 events. 2508/4247 cut-off events. For 386958/386958 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 26919 event pairs, 673 based on Foata normal form. 2/4240 useless extension candidates. Maximal degree in co-relation 30497. Up to 3338 conditions per place. [2024-06-14 14:02:25,881 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 190 selfloop transitions, 163 changer transitions 0/360 dead transitions. [2024-06-14 14:02:25,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 360 transitions, 6369 flow [2024-06-14 14:02:25,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:02:25,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:02:25,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 208 transitions. [2024-06-14 14:02:25,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5502645502645502 [2024-06-14 14:02:25,882 INFO L175 Difference]: Start difference. First operand has 275 places, 334 transitions, 5004 flow. Second operand 9 states and 208 transitions. [2024-06-14 14:02:25,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 360 transitions, 6369 flow [2024-06-14 14:02:26,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 360 transitions, 5998 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-14 14:02:26,502 INFO L231 Difference]: Finished difference. Result has 277 places, 341 transitions, 5127 flow [2024-06-14 14:02:26,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4643, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5127, PETRI_PLACES=277, PETRI_TRANSITIONS=341} [2024-06-14 14:02:26,503 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 234 predicate places. [2024-06-14 14:02:26,503 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 341 transitions, 5127 flow [2024-06-14 14:02:26,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:26,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:02:26,503 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:02:26,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-14 14:02:26,503 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:02:26,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:02:26,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1381618293, now seen corresponding path program 8 times [2024-06-14 14:02:26,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:02:26,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086868222] [2024-06-14 14:02:26,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:02:26,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:02:26,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:02:26,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:02:26,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:02:26,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086868222] [2024-06-14 14:02:26,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086868222] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:02:26,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:02:26,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:02:26,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809982225] [2024-06-14 14:02:26,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:02:26,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:02:26,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:02:26,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:02:26,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:02:26,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:02:26,737 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 341 transitions, 5127 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:26,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:02:26,738 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:02:26,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:02:27,487 INFO L124 PetriNetUnfolderBase]: 2526/4298 cut-off events. [2024-06-14 14:02:27,487 INFO L125 PetriNetUnfolderBase]: For 399018/399018 co-relation queries the response was YES. [2024-06-14 14:02:27,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31033 conditions, 4298 events. 2526/4298 cut-off events. For 399018/399018 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 27392 event pairs, 644 based on Foata normal form. 2/4297 useless extension candidates. Maximal degree in co-relation 30906. Up to 3558 conditions per place. [2024-06-14 14:02:27,531 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 246 selfloop transitions, 120 changer transitions 0/373 dead transitions. [2024-06-14 14:02:27,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 373 transitions, 6371 flow [2024-06-14 14:02:27,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:02:27,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:02:27,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-14 14:02:27,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.608843537414966 [2024-06-14 14:02:27,532 INFO L175 Difference]: Start difference. First operand has 277 places, 341 transitions, 5127 flow. Second operand 7 states and 179 transitions. [2024-06-14 14:02:27,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 373 transitions, 6371 flow [2024-06-14 14:02:28,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 373 transitions, 5990 flow, removed 54 selfloop flow, removed 5 redundant places. [2024-06-14 14:02:28,313 INFO L231 Difference]: Finished difference. Result has 280 places, 347 transitions, 5193 flow [2024-06-14 14:02:28,313 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4758, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5193, PETRI_PLACES=280, PETRI_TRANSITIONS=347} [2024-06-14 14:02:28,313 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 237 predicate places. [2024-06-14 14:02:28,313 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 347 transitions, 5193 flow [2024-06-14 14:02:28,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:28,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:02:28,314 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:02:28,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-14 14:02:28,314 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:02:28,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:02:28,314 INFO L85 PathProgramCache]: Analyzing trace with hash 95936054, now seen corresponding path program 1 times [2024-06-14 14:02:28,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:02:28,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330932834] [2024-06-14 14:02:28,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:02:28,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:02:28,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:02:28,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:02:28,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:02:28,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330932834] [2024-06-14 14:02:28,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330932834] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:02:28,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:02:28,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:02:28,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661633978] [2024-06-14 14:02:28,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:02:28,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:02:28,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:02:28,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:02:28,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:02:28,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:02:28,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 347 transitions, 5193 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:28,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:02:28,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:02:28,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:02:29,323 INFO L124 PetriNetUnfolderBase]: 2751/4699 cut-off events. [2024-06-14 14:02:29,323 INFO L125 PetriNetUnfolderBase]: For 537888/537892 co-relation queries the response was YES. [2024-06-14 14:02:29,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35806 conditions, 4699 events. 2751/4699 cut-off events. For 537888/537892 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 30626 event pairs, 639 based on Foata normal form. 16/4713 useless extension candidates. Maximal degree in co-relation 35677. Up to 3434 conditions per place. [2024-06-14 14:02:29,378 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 266 selfloop transitions, 114 changer transitions 0/387 dead transitions. [2024-06-14 14:02:29,378 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 387 transitions, 6567 flow [2024-06-14 14:02:29,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:02:29,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:02:29,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 211 transitions. [2024-06-14 14:02:29,379 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5582010582010583 [2024-06-14 14:02:29,379 INFO L175 Difference]: Start difference. First operand has 280 places, 347 transitions, 5193 flow. Second operand 9 states and 211 transitions. [2024-06-14 14:02:29,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 387 transitions, 6567 flow [2024-06-14 14:02:30,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 387 transitions, 6441 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-14 14:02:30,341 INFO L231 Difference]: Finished difference. Result has 288 places, 353 transitions, 5477 flow [2024-06-14 14:02:30,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5067, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5477, PETRI_PLACES=288, PETRI_TRANSITIONS=353} [2024-06-14 14:02:30,342 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 245 predicate places. [2024-06-14 14:02:30,342 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 353 transitions, 5477 flow [2024-06-14 14:02:30,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:30,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:02:30,342 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:02:30,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-14 14:02:30,343 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:02:30,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:02:30,343 INFO L85 PathProgramCache]: Analyzing trace with hash -415672138, now seen corresponding path program 2 times [2024-06-14 14:02:30,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:02:30,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533675587] [2024-06-14 14:02:30,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:02:30,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:02:30,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:02:30,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:02:30,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:02:30,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533675587] [2024-06-14 14:02:30,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533675587] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:02:30,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:02:30,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:02:30,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805303078] [2024-06-14 14:02:30,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:02:30,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:02:30,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:02:30,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:02:30,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:02:30,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:02:30,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 353 transitions, 5477 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:30,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:02:30,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:02:30,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:02:31,527 INFO L124 PetriNetUnfolderBase]: 2903/4931 cut-off events. [2024-06-14 14:02:31,527 INFO L125 PetriNetUnfolderBase]: For 613008/613012 co-relation queries the response was YES. [2024-06-14 14:02:31,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39461 conditions, 4931 events. 2903/4931 cut-off events. For 613008/613012 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 32241 event pairs, 748 based on Foata normal form. 16/4945 useless extension candidates. Maximal degree in co-relation 39329. Up to 4038 conditions per place. [2024-06-14 14:02:31,580 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 270 selfloop transitions, 105 changer transitions 0/382 dead transitions. [2024-06-14 14:02:31,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 382 transitions, 6589 flow [2024-06-14 14:02:31,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:02:31,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:02:31,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 205 transitions. [2024-06-14 14:02:31,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5423280423280423 [2024-06-14 14:02:31,582 INFO L175 Difference]: Start difference. First operand has 288 places, 353 transitions, 5477 flow. Second operand 9 states and 205 transitions. [2024-06-14 14:02:31,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 382 transitions, 6589 flow [2024-06-14 14:02:32,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 382 transitions, 6426 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-14 14:02:32,644 INFO L231 Difference]: Finished difference. Result has 294 places, 357 transitions, 5639 flow [2024-06-14 14:02:32,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5314, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5639, PETRI_PLACES=294, PETRI_TRANSITIONS=357} [2024-06-14 14:02:32,645 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 251 predicate places. [2024-06-14 14:02:32,645 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 357 transitions, 5639 flow [2024-06-14 14:02:32,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:32,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:02:32,645 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:02:32,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-14 14:02:32,645 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:02:32,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:02:32,646 INFO L85 PathProgramCache]: Analyzing trace with hash 1217190414, now seen corresponding path program 3 times [2024-06-14 14:02:32,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:02:32,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920351681] [2024-06-14 14:02:32,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:02:32,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:02:32,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:02:32,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:02:32,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:02:32,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920351681] [2024-06-14 14:02:32,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920351681] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:02:32,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:02:32,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:02:32,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360638410] [2024-06-14 14:02:32,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:02:32,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:02:32,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:02:32,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:02:32,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:02:32,931 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:02:32,932 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 357 transitions, 5639 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:32,932 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:02:32,932 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:02:32,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:02:33,730 INFO L124 PetriNetUnfolderBase]: 2913/4961 cut-off events. [2024-06-14 14:02:33,730 INFO L125 PetriNetUnfolderBase]: For 615264/615268 co-relation queries the response was YES. [2024-06-14 14:02:33,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39354 conditions, 4961 events. 2913/4961 cut-off events. For 615264/615268 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 32565 event pairs, 769 based on Foata normal form. 20/4979 useless extension candidates. Maximal degree in co-relation 39219. Up to 4212 conditions per place. [2024-06-14 14:02:33,797 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 265 selfloop transitions, 107 changer transitions 0/379 dead transitions. [2024-06-14 14:02:33,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 379 transitions, 6501 flow [2024-06-14 14:02:33,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:02:33,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:02:33,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 202 transitions. [2024-06-14 14:02:33,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5343915343915344 [2024-06-14 14:02:33,798 INFO L175 Difference]: Start difference. First operand has 294 places, 357 transitions, 5639 flow. Second operand 9 states and 202 transitions. [2024-06-14 14:02:33,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 379 transitions, 6501 flow [2024-06-14 14:02:35,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 379 transitions, 6336 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-14 14:02:35,360 INFO L231 Difference]: Finished difference. Result has 298 places, 359 transitions, 5752 flow [2024-06-14 14:02:35,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5474, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5752, PETRI_PLACES=298, PETRI_TRANSITIONS=359} [2024-06-14 14:02:35,361 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 255 predicate places. [2024-06-14 14:02:35,361 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 359 transitions, 5752 flow [2024-06-14 14:02:35,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:35,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:02:35,362 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:02:35,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-14 14:02:35,362 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:02:35,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:02:35,362 INFO L85 PathProgramCache]: Analyzing trace with hash 1355718564, now seen corresponding path program 4 times [2024-06-14 14:02:35,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:02:35,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112435767] [2024-06-14 14:02:35,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:02:35,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:02:35,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:02:35,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:02:35,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:02:35,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112435767] [2024-06-14 14:02:35,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112435767] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:02:35,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:02:35,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:02:35,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276273671] [2024-06-14 14:02:35,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:02:35,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:02:35,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:02:35,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:02:35,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:02:35,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:02:35,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 359 transitions, 5752 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:35,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:02:35,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:02:35,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:02:36,687 INFO L124 PetriNetUnfolderBase]: 2969/5030 cut-off events. [2024-06-14 14:02:36,687 INFO L125 PetriNetUnfolderBase]: For 636156/636156 co-relation queries the response was YES. [2024-06-14 14:02:36,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40281 conditions, 5030 events. 2969/5030 cut-off events. For 636156/636156 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 32986 event pairs, 773 based on Foata normal form. 16/5041 useless extension candidates. Maximal degree in co-relation 40144. Up to 4431 conditions per place. [2024-06-14 14:02:36,753 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 312 selfloop transitions, 61 changer transitions 0/380 dead transitions. [2024-06-14 14:02:36,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 380 transitions, 6615 flow [2024-06-14 14:02:36,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:02:36,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:02:36,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 181 transitions. [2024-06-14 14:02:36,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5386904761904762 [2024-06-14 14:02:36,754 INFO L175 Difference]: Start difference. First operand has 298 places, 359 transitions, 5752 flow. Second operand 8 states and 181 transitions. [2024-06-14 14:02:36,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 380 transitions, 6615 flow [2024-06-14 14:02:38,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 380 transitions, 6369 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-14 14:02:38,254 INFO L231 Difference]: Finished difference. Result has 299 places, 361 transitions, 5693 flow [2024-06-14 14:02:38,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5506, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5693, PETRI_PLACES=299, PETRI_TRANSITIONS=361} [2024-06-14 14:02:38,254 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 256 predicate places. [2024-06-14 14:02:38,254 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 361 transitions, 5693 flow [2024-06-14 14:02:38,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:38,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:02:38,255 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:02:38,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-14 14:02:38,255 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:02:38,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:02:38,255 INFO L85 PathProgramCache]: Analyzing trace with hash -536439212, now seen corresponding path program 5 times [2024-06-14 14:02:38,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:02:38,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282144293] [2024-06-14 14:02:38,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:02:38,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:02:38,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:02:38,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:02:38,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:02:38,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282144293] [2024-06-14 14:02:38,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282144293] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:02:38,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:02:38,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:02:38,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224543981] [2024-06-14 14:02:38,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:02:38,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:02:38,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:02:38,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:02:38,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:02:38,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:02:38,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 361 transitions, 5693 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:38,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:02:38,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:02:38,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:02:39,497 INFO L124 PetriNetUnfolderBase]: 3108/5277 cut-off events. [2024-06-14 14:02:39,497 INFO L125 PetriNetUnfolderBase]: For 692154/692154 co-relation queries the response was YES. [2024-06-14 14:02:39,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43157 conditions, 5277 events. 3108/5277 cut-off events. For 692154/692154 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 35115 event pairs, 820 based on Foata normal form. 12/5284 useless extension candidates. Maximal degree in co-relation 43019. Up to 4275 conditions per place. [2024-06-14 14:02:39,569 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 273 selfloop transitions, 111 changer transitions 0/391 dead transitions. [2024-06-14 14:02:39,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 391 transitions, 6853 flow [2024-06-14 14:02:39,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:02:39,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:02:39,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 225 transitions. [2024-06-14 14:02:39,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2024-06-14 14:02:39,570 INFO L175 Difference]: Start difference. First operand has 299 places, 361 transitions, 5693 flow. Second operand 10 states and 225 transitions. [2024-06-14 14:02:39,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 391 transitions, 6853 flow [2024-06-14 14:02:40,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 391 transitions, 6713 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-14 14:02:40,684 INFO L231 Difference]: Finished difference. Result has 305 places, 365 transitions, 5911 flow [2024-06-14 14:02:40,684 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5553, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5911, PETRI_PLACES=305, PETRI_TRANSITIONS=365} [2024-06-14 14:02:40,684 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 262 predicate places. [2024-06-14 14:02:40,684 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 365 transitions, 5911 flow [2024-06-14 14:02:40,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:40,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:02:40,684 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:02:40,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-14 14:02:40,685 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:02:40,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:02:40,685 INFO L85 PathProgramCache]: Analyzing trace with hash -530928962, now seen corresponding path program 6 times [2024-06-14 14:02:40,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:02:40,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484761721] [2024-06-14 14:02:40,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:02:40,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:02:40,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:02:40,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:02:40,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:02:40,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484761721] [2024-06-14 14:02:40,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484761721] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:02:40,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:02:40,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:02:40,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636575937] [2024-06-14 14:02:40,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:02:40,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:02:40,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:02:40,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:02:40,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:02:40,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:02:40,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 365 transitions, 5911 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:40,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:02:40,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:02:40,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:02:41,965 INFO L124 PetriNetUnfolderBase]: 3118/5291 cut-off events. [2024-06-14 14:02:41,965 INFO L125 PetriNetUnfolderBase]: For 697587/697587 co-relation queries the response was YES. [2024-06-14 14:02:42,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42876 conditions, 5291 events. 3118/5291 cut-off events. For 697587/697587 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 35196 event pairs, 822 based on Foata normal form. 16/5302 useless extension candidates. Maximal degree in co-relation 42735. Up to 4535 conditions per place. [2024-06-14 14:02:42,038 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 264 selfloop transitions, 119 changer transitions 0/390 dead transitions. [2024-06-14 14:02:42,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 390 transitions, 6811 flow [2024-06-14 14:02:42,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 14:02:42,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 14:02:42,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 260 transitions. [2024-06-14 14:02:42,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5158730158730159 [2024-06-14 14:02:42,039 INFO L175 Difference]: Start difference. First operand has 305 places, 365 transitions, 5911 flow. Second operand 12 states and 260 transitions. [2024-06-14 14:02:42,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 390 transitions, 6811 flow [2024-06-14 14:02:43,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 390 transitions, 6669 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-14 14:02:43,362 INFO L231 Difference]: Finished difference. Result has 312 places, 367 transitions, 6081 flow [2024-06-14 14:02:43,363 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5771, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6081, PETRI_PLACES=312, PETRI_TRANSITIONS=367} [2024-06-14 14:02:43,363 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 269 predicate places. [2024-06-14 14:02:43,363 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 367 transitions, 6081 flow [2024-06-14 14:02:43,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:43,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:02:43,363 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:02:43,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-14 14:02:43,364 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:02:43,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:02:43,364 INFO L85 PathProgramCache]: Analyzing trace with hash -530713760, now seen corresponding path program 1 times [2024-06-14 14:02:43,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:02:43,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050973087] [2024-06-14 14:02:43,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:02:43,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:02:43,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:02:43,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:02:43,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:02:43,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050973087] [2024-06-14 14:02:43,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050973087] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:02:43,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:02:43,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:02:43,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837801179] [2024-06-14 14:02:43,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:02:43,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:02:43,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:02:43,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:02:43,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:02:43,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:02:43,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 367 transitions, 6081 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:43,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:02:43,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:02:43,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:02:44,690 INFO L124 PetriNetUnfolderBase]: 3125/5310 cut-off events. [2024-06-14 14:02:44,690 INFO L125 PetriNetUnfolderBase]: For 672479/672479 co-relation queries the response was YES. [2024-06-14 14:02:44,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42600 conditions, 5310 events. 3125/5310 cut-off events. For 672479/672479 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 35382 event pairs, 811 based on Foata normal form. 12/5317 useless extension candidates. Maximal degree in co-relation 42457. Up to 4424 conditions per place. [2024-06-14 14:02:44,763 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 262 selfloop transitions, 126 changer transitions 0/395 dead transitions. [2024-06-14 14:02:44,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 395 transitions, 6999 flow [2024-06-14 14:02:44,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 14:02:44,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 14:02:44,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 262 transitions. [2024-06-14 14:02:44,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5198412698412699 [2024-06-14 14:02:44,764 INFO L175 Difference]: Start difference. First operand has 312 places, 367 transitions, 6081 flow. Second operand 12 states and 262 transitions. [2024-06-14 14:02:44,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 395 transitions, 6999 flow [2024-06-14 14:02:46,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 395 transitions, 6721 flow, removed 22 selfloop flow, removed 10 redundant places. [2024-06-14 14:02:46,615 INFO L231 Difference]: Finished difference. Result has 314 places, 369 transitions, 6122 flow [2024-06-14 14:02:46,615 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5803, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6122, PETRI_PLACES=314, PETRI_TRANSITIONS=369} [2024-06-14 14:02:46,616 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 271 predicate places. [2024-06-14 14:02:46,616 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 369 transitions, 6122 flow [2024-06-14 14:02:46,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:46,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:02:46,616 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:02:46,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-14 14:02:46,616 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:02:46,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:02:46,616 INFO L85 PathProgramCache]: Analyzing trace with hash -953718702, now seen corresponding path program 7 times [2024-06-14 14:02:46,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:02:46,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577964626] [2024-06-14 14:02:46,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:02:46,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:02:46,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:02:46,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:02:46,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:02:46,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577964626] [2024-06-14 14:02:46,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577964626] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:02:46,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:02:46,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:02:46,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979692950] [2024-06-14 14:02:46,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:02:46,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:02:46,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:02:46,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:02:46,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:02:46,892 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:02:46,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 369 transitions, 6122 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:46,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:02:46,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:02:46,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:02:47,823 INFO L124 PetriNetUnfolderBase]: 3257/5525 cut-off events. [2024-06-14 14:02:47,823 INFO L125 PetriNetUnfolderBase]: For 796177/796177 co-relation queries the response was YES. [2024-06-14 14:02:47,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43681 conditions, 5525 events. 3257/5525 cut-off events. For 796177/796177 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 37114 event pairs, 858 based on Foata normal form. 42/5564 useless extension candidates. Maximal degree in co-relation 43537. Up to 4649 conditions per place. [2024-06-14 14:02:47,895 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 281 selfloop transitions, 97 changer transitions 7/392 dead transitions. [2024-06-14 14:02:47,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 392 transitions, 7017 flow [2024-06-14 14:02:47,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:02:47,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:02:47,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-14 14:02:47,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5684523809523809 [2024-06-14 14:02:47,896 INFO L175 Difference]: Start difference. First operand has 314 places, 369 transitions, 6122 flow. Second operand 8 states and 191 transitions. [2024-06-14 14:02:47,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 392 transitions, 7017 flow [2024-06-14 14:02:49,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 392 transitions, 6716 flow, removed 26 selfloop flow, removed 10 redundant places. [2024-06-14 14:02:49,454 INFO L231 Difference]: Finished difference. Result has 312 places, 366 transitions, 5999 flow [2024-06-14 14:02:49,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5821, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5999, PETRI_PLACES=312, PETRI_TRANSITIONS=366} [2024-06-14 14:02:49,454 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 269 predicate places. [2024-06-14 14:02:49,454 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 366 transitions, 5999 flow [2024-06-14 14:02:49,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:49,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:02:49,455 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:02:49,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-14 14:02:49,455 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:02:49,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:02:49,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1258908628, now seen corresponding path program 8 times [2024-06-14 14:02:49,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:02:49,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707028166] [2024-06-14 14:02:49,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:02:49,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:02:49,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:02:49,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:02:49,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:02:49,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707028166] [2024-06-14 14:02:49,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707028166] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:02:49,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:02:49,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:02:49,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269635470] [2024-06-14 14:02:49,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:02:49,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:02:49,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:02:49,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:02:49,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:02:49,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:02:49,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 366 transitions, 5999 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:49,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:02:49,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:02:49,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:02:50,652 INFO L124 PetriNetUnfolderBase]: 3199/5445 cut-off events. [2024-06-14 14:02:50,652 INFO L125 PetriNetUnfolderBase]: For 745671/745671 co-relation queries the response was YES. [2024-06-14 14:02:50,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41404 conditions, 5445 events. 3199/5445 cut-off events. For 745671/745671 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 36493 event pairs, 850 based on Foata normal form. 42/5484 useless extension candidates. Maximal degree in co-relation 41259. Up to 4572 conditions per place. [2024-06-14 14:02:50,721 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 288 selfloop transitions, 89 changer transitions 6/390 dead transitions. [2024-06-14 14:02:50,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 390 transitions, 6876 flow [2024-06-14 14:02:50,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:02:50,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:02:50,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-14 14:02:50,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5918367346938775 [2024-06-14 14:02:50,722 INFO L175 Difference]: Start difference. First operand has 312 places, 366 transitions, 5999 flow. Second operand 7 states and 174 transitions. [2024-06-14 14:02:50,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 390 transitions, 6876 flow [2024-06-14 14:02:52,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 390 transitions, 6658 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-14 14:02:52,405 INFO L231 Difference]: Finished difference. Result has 313 places, 363 transitions, 5930 flow [2024-06-14 14:02:52,406 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5781, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5930, PETRI_PLACES=313, PETRI_TRANSITIONS=363} [2024-06-14 14:02:52,406 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 270 predicate places. [2024-06-14 14:02:52,406 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 363 transitions, 5930 flow [2024-06-14 14:02:52,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:52,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:02:52,407 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:02:52,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-14 14:02:52,407 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:02:52,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:02:52,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1324514492, now seen corresponding path program 9 times [2024-06-14 14:02:52,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:02:52,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10637295] [2024-06-14 14:02:52,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:02:52,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:02:52,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:02:52,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:02:52,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:02:52,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10637295] [2024-06-14 14:02:52,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10637295] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:02:52,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:02:52,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:02:52,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126492196] [2024-06-14 14:02:52,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:02:52,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:02:52,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:02:52,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:02:52,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:02:52,679 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:02:52,679 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 363 transitions, 5930 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:52,679 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:02:52,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:02:52,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:02:53,642 INFO L124 PetriNetUnfolderBase]: 3198/5476 cut-off events. [2024-06-14 14:02:53,642 INFO L125 PetriNetUnfolderBase]: For 717242/717242 co-relation queries the response was YES. [2024-06-14 14:02:53,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40918 conditions, 5476 events. 3198/5476 cut-off events. For 717242/717242 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 36990 event pairs, 711 based on Foata normal form. 36/5509 useless extension candidates. Maximal degree in co-relation 40772. Up to 4008 conditions per place. [2024-06-14 14:02:53,724 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 291 selfloop transitions, 93 changer transitions 7/398 dead transitions. [2024-06-14 14:02:53,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 398 transitions, 7071 flow [2024-06-14 14:02:53,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:02:53,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:02:53,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-14 14:02:53,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6224489795918368 [2024-06-14 14:02:53,725 INFO L175 Difference]: Start difference. First operand has 313 places, 363 transitions, 5930 flow. Second operand 7 states and 183 transitions. [2024-06-14 14:02:53,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 398 transitions, 7071 flow [2024-06-14 14:02:55,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 398 transitions, 6865 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-14 14:02:55,261 INFO L231 Difference]: Finished difference. Result has 316 places, 361 transitions, 5916 flow [2024-06-14 14:02:55,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5724, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5916, PETRI_PLACES=316, PETRI_TRANSITIONS=361} [2024-06-14 14:02:55,262 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 273 predicate places. [2024-06-14 14:02:55,262 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 361 transitions, 5916 flow [2024-06-14 14:02:55,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:55,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:02:55,263 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:02:55,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-14 14:02:55,263 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:02:55,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:02:55,263 INFO L85 PathProgramCache]: Analyzing trace with hash -260512732, now seen corresponding path program 2 times [2024-06-14 14:02:55,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:02:55,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39371425] [2024-06-14 14:02:55,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:02:55,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:02:55,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:02:55,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:02:55,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:02:55,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39371425] [2024-06-14 14:02:55,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39371425] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:02:55,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:02:55,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:02:55,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033462392] [2024-06-14 14:02:55,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:02:55,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:02:55,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:02:55,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:02:55,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:02:55,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:02:55,551 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 361 transitions, 5916 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:55,551 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:02:55,551 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:02:55,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:02:56,481 INFO L124 PetriNetUnfolderBase]: 2952/5050 cut-off events. [2024-06-14 14:02:56,481 INFO L125 PetriNetUnfolderBase]: For 590718/590718 co-relation queries the response was YES. [2024-06-14 14:02:56,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36231 conditions, 5050 events. 2952/5050 cut-off events. For 590718/590718 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 33717 event pairs, 634 based on Foata normal form. 36/5083 useless extension candidates. Maximal degree in co-relation 36083. Up to 3838 conditions per place. [2024-06-14 14:02:56,552 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 272 selfloop transitions, 95 changer transitions 15/389 dead transitions. [2024-06-14 14:02:56,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 389 transitions, 6817 flow [2024-06-14 14:02:56,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:02:56,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:02:56,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-14 14:02:56,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-14 14:02:56,553 INFO L175 Difference]: Start difference. First operand has 316 places, 361 transitions, 5916 flow. Second operand 8 states and 196 transitions. [2024-06-14 14:02:56,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 389 transitions, 6817 flow [2024-06-14 14:02:58,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 389 transitions, 6325 flow, removed 49 selfloop flow, removed 9 redundant places. [2024-06-14 14:02:58,318 INFO L231 Difference]: Finished difference. Result has 315 places, 352 transitions, 5485 flow [2024-06-14 14:02:58,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5432, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5485, PETRI_PLACES=315, PETRI_TRANSITIONS=352} [2024-06-14 14:02:58,319 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 272 predicate places. [2024-06-14 14:02:58,319 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 352 transitions, 5485 flow [2024-06-14 14:02:58,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:58,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:02:58,319 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:02:58,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-14 14:02:58,319 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:02:58,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:02:58,320 INFO L85 PathProgramCache]: Analyzing trace with hash -121803464, now seen corresponding path program 1 times [2024-06-14 14:02:58,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:02:58,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809752708] [2024-06-14 14:02:58,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:02:58,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:02:58,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:02:58,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:02:58,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:02:58,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809752708] [2024-06-14 14:02:58,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809752708] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:02:58,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:02:58,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:02:58,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56320027] [2024-06-14 14:02:58,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:02:58,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:02:58,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:02:58,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:02:58,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:02:58,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:02:58,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 352 transitions, 5485 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:58,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:02:58,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:02:58,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:02:59,380 INFO L124 PetriNetUnfolderBase]: 2760/4731 cut-off events. [2024-06-14 14:02:59,380 INFO L125 PetriNetUnfolderBase]: For 458656/458656 co-relation queries the response was YES. [2024-06-14 14:02:59,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33762 conditions, 4731 events. 2760/4731 cut-off events. For 458656/458656 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 31143 event pairs, 621 based on Foata normal form. 1/4730 useless extension candidates. Maximal degree in co-relation 33616. Up to 4226 conditions per place. [2024-06-14 14:02:59,441 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 345 selfloop transitions, 36 changer transitions 0/388 dead transitions. [2024-06-14 14:02:59,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 388 transitions, 6551 flow [2024-06-14 14:02:59,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:02:59,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:02:59,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 226 transitions. [2024-06-14 14:02:59,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5380952380952381 [2024-06-14 14:02:59,442 INFO L175 Difference]: Start difference. First operand has 315 places, 352 transitions, 5485 flow. Second operand 10 states and 226 transitions. [2024-06-14 14:02:59,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 388 transitions, 6551 flow [2024-06-14 14:03:00,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 388 transitions, 6284 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-14 14:03:00,665 INFO L231 Difference]: Finished difference. Result has 319 places, 355 transitions, 5342 flow [2024-06-14 14:03:00,665 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5220, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5342, PETRI_PLACES=319, PETRI_TRANSITIONS=355} [2024-06-14 14:03:00,665 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 276 predicate places. [2024-06-14 14:03:00,665 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 355 transitions, 5342 flow [2024-06-14 14:03:00,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:00,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:03:00,665 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:03:00,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-14 14:03:00,666 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:03:00,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:03:00,666 INFO L85 PathProgramCache]: Analyzing trace with hash 303185336, now seen corresponding path program 2 times [2024-06-14 14:03:00,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:03:00,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451712414] [2024-06-14 14:03:00,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:03:00,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:03:00,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:03:00,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:03:00,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:03:00,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451712414] [2024-06-14 14:03:00,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451712414] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:03:00,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:03:00,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:03:00,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627833281] [2024-06-14 14:03:00,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:03:00,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:03:00,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:03:00,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:03:00,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:03:00,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:03:00,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 355 transitions, 5342 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:00,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:03:00,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:03:00,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:03:01,804 INFO L124 PetriNetUnfolderBase]: 2757/4727 cut-off events. [2024-06-14 14:03:01,804 INFO L125 PetriNetUnfolderBase]: For 452441/452441 co-relation queries the response was YES. [2024-06-14 14:03:01,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33227 conditions, 4727 events. 2757/4727 cut-off events. For 452441/452441 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 31175 event pairs, 621 based on Foata normal form. 1/4726 useless extension candidates. Maximal degree in co-relation 33080. Up to 4223 conditions per place. [2024-06-14 14:03:01,868 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 344 selfloop transitions, 35 changer transitions 0/386 dead transitions. [2024-06-14 14:03:01,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 386 transitions, 6178 flow [2024-06-14 14:03:01,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:03:01,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:03:01,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 208 transitions. [2024-06-14 14:03:01,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5502645502645502 [2024-06-14 14:03:01,869 INFO L175 Difference]: Start difference. First operand has 319 places, 355 transitions, 5342 flow. Second operand 9 states and 208 transitions. [2024-06-14 14:03:01,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 386 transitions, 6178 flow [2024-06-14 14:03:03,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 386 transitions, 6074 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-14 14:03:03,480 INFO L231 Difference]: Finished difference. Result has 320 places, 355 transitions, 5314 flow [2024-06-14 14:03:03,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5238, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5314, PETRI_PLACES=320, PETRI_TRANSITIONS=355} [2024-06-14 14:03:03,481 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 277 predicate places. [2024-06-14 14:03:03,481 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 355 transitions, 5314 flow [2024-06-14 14:03:03,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:03,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:03:03,481 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:03:03,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-14 14:03:03,481 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:03:03,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:03:03,482 INFO L85 PathProgramCache]: Analyzing trace with hash 1887495590, now seen corresponding path program 1 times [2024-06-14 14:03:03,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:03:03,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424521191] [2024-06-14 14:03:03,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:03:03,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:03:03,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:03:03,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:03:03,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:03:03,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424521191] [2024-06-14 14:03:03,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424521191] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:03:03,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:03:03,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:03:03,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754953278] [2024-06-14 14:03:03,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:03:03,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:03:03,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:03:03,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:03:03,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:03:03,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:03:03,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 355 transitions, 5314 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:03,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:03:03,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:03:03,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:03:04,523 INFO L124 PetriNetUnfolderBase]: 2770/4740 cut-off events. [2024-06-14 14:03:04,523 INFO L125 PetriNetUnfolderBase]: For 467175/467175 co-relation queries the response was YES. [2024-06-14 14:03:04,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33549 conditions, 4740 events. 2770/4740 cut-off events. For 467175/467175 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 31280 event pairs, 639 based on Foata normal form. 1/4738 useless extension candidates. Maximal degree in co-relation 33401. Up to 3990 conditions per place. [2024-06-14 14:03:04,584 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 249 selfloop transitions, 123 changer transitions 0/379 dead transitions. [2024-06-14 14:03:04,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 379 transitions, 6397 flow [2024-06-14 14:03:04,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:03:04,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:03:04,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-14 14:03:04,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884353741496599 [2024-06-14 14:03:04,585 INFO L175 Difference]: Start difference. First operand has 320 places, 355 transitions, 5314 flow. Second operand 7 states and 173 transitions. [2024-06-14 14:03:04,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 379 transitions, 6397 flow [2024-06-14 14:03:06,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 379 transitions, 6327 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-14 14:03:06,270 INFO L231 Difference]: Finished difference. Result has 320 places, 361 transitions, 5710 flow [2024-06-14 14:03:06,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5244, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5710, PETRI_PLACES=320, PETRI_TRANSITIONS=361} [2024-06-14 14:03:06,270 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 277 predicate places. [2024-06-14 14:03:06,270 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 361 transitions, 5710 flow [2024-06-14 14:03:06,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:06,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:03:06,270 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:03:06,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-14 14:03:06,271 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:03:06,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:03:06,271 INFO L85 PathProgramCache]: Analyzing trace with hash -97231670, now seen corresponding path program 3 times [2024-06-14 14:03:06,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:03:06,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934719175] [2024-06-14 14:03:06,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:03:06,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:03:06,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:03:06,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:03:06,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:03:06,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934719175] [2024-06-14 14:03:06,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934719175] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:03:06,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:03:06,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:03:06,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120638579] [2024-06-14 14:03:06,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:03:06,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:03:06,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:03:06,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:03:06,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:03:06,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:03:06,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 361 transitions, 5710 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:06,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:03:06,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:03:06,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:03:07,531 INFO L124 PetriNetUnfolderBase]: 2824/4831 cut-off events. [2024-06-14 14:03:07,532 INFO L125 PetriNetUnfolderBase]: For 500966/500966 co-relation queries the response was YES. [2024-06-14 14:03:07,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35376 conditions, 4831 events. 2824/4831 cut-off events. For 500966/500966 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 31969 event pairs, 617 based on Foata normal form. 1/4830 useless extension candidates. Maximal degree in co-relation 35226. Up to 4135 conditions per place. [2024-06-14 14:03:07,745 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 293 selfloop transitions, 115 changer transitions 0/415 dead transitions. [2024-06-14 14:03:07,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 415 transitions, 7676 flow [2024-06-14 14:03:07,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:03:07,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:03:07,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 228 transitions. [2024-06-14 14:03:07,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5428571428571428 [2024-06-14 14:03:07,747 INFO L175 Difference]: Start difference. First operand has 320 places, 361 transitions, 5710 flow. Second operand 10 states and 228 transitions. [2024-06-14 14:03:07,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 415 transitions, 7676 flow [2024-06-14 14:03:09,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 415 transitions, 7451 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-14 14:03:09,432 INFO L231 Difference]: Finished difference. Result has 326 places, 384 transitions, 6282 flow [2024-06-14 14:03:09,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5499, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6282, PETRI_PLACES=326, PETRI_TRANSITIONS=384} [2024-06-14 14:03:09,433 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 283 predicate places. [2024-06-14 14:03:09,433 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 384 transitions, 6282 flow [2024-06-14 14:03:09,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:09,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:03:09,433 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:03:09,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-14 14:03:09,434 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:03:09,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:03:09,434 INFO L85 PathProgramCache]: Analyzing trace with hash -1790424286, now seen corresponding path program 4 times [2024-06-14 14:03:09,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:03:09,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340837532] [2024-06-14 14:03:09,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:03:09,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:03:09,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:03:09,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:03:09,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:03:09,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340837532] [2024-06-14 14:03:09,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340837532] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:03:09,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:03:09,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:03:09,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106902042] [2024-06-14 14:03:09,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:03:09,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:03:09,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:03:09,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:03:09,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:03:09,664 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:03:09,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 384 transitions, 6282 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:09,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:03:09,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:03:09,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:03:10,598 INFO L124 PetriNetUnfolderBase]: 2869/4906 cut-off events. [2024-06-14 14:03:10,598 INFO L125 PetriNetUnfolderBase]: For 524727/524727 co-relation queries the response was YES. [2024-06-14 14:03:10,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36534 conditions, 4906 events. 2869/4906 cut-off events. For 524727/524727 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 32483 event pairs, 615 based on Foata normal form. 1/4905 useless extension candidates. Maximal degree in co-relation 36383. Up to 3846 conditions per place. [2024-06-14 14:03:10,671 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 193 selfloop transitions, 224 changer transitions 0/424 dead transitions. [2024-06-14 14:03:10,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 424 transitions, 8203 flow [2024-06-14 14:03:10,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:03:10,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:03:10,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 234 transitions. [2024-06-14 14:03:10,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5571428571428572 [2024-06-14 14:03:10,672 INFO L175 Difference]: Start difference. First operand has 326 places, 384 transitions, 6282 flow. Second operand 10 states and 234 transitions. [2024-06-14 14:03:10,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 424 transitions, 8203 flow [2024-06-14 14:03:12,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 424 transitions, 7985 flow, removed 79 selfloop flow, removed 4 redundant places. [2024-06-14 14:03:12,523 INFO L231 Difference]: Finished difference. Result has 332 places, 397 transitions, 6813 flow [2024-06-14 14:03:12,524 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6100, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=211, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6813, PETRI_PLACES=332, PETRI_TRANSITIONS=397} [2024-06-14 14:03:12,524 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 289 predicate places. [2024-06-14 14:03:12,524 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 397 transitions, 6813 flow [2024-06-14 14:03:12,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:12,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:03:12,525 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:03:12,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-14 14:03:12,525 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:03:12,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:03:12,525 INFO L85 PathProgramCache]: Analyzing trace with hash -1410783828, now seen corresponding path program 5 times [2024-06-14 14:03:12,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:03:12,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005215142] [2024-06-14 14:03:12,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:03:12,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:03:12,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:03:12,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:03:12,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:03:12,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005215142] [2024-06-14 14:03:12,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005215142] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:03:12,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:03:12,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:03:12,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878336003] [2024-06-14 14:03:12,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:03:12,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:03:12,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:03:12,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:03:12,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:03:12,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:03:12,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 397 transitions, 6813 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:12,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:03:12,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:03:12,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:03:13,965 INFO L124 PetriNetUnfolderBase]: 2898/4955 cut-off events. [2024-06-14 14:03:13,966 INFO L125 PetriNetUnfolderBase]: For 550372/550372 co-relation queries the response was YES. [2024-06-14 14:03:14,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37780 conditions, 4955 events. 2898/4955 cut-off events. For 550372/550372 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 32916 event pairs, 617 based on Foata normal form. 1/4954 useless extension candidates. Maximal degree in co-relation 37627. Up to 3871 conditions per place. [2024-06-14 14:03:14,040 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 203 selfloop transitions, 232 changer transitions 0/442 dead transitions. [2024-06-14 14:03:14,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 442 transitions, 8555 flow [2024-06-14 14:03:14,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 14:03:14,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 14:03:14,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 294 transitions. [2024-06-14 14:03:14,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5384615384615384 [2024-06-14 14:03:14,042 INFO L175 Difference]: Start difference. First operand has 332 places, 397 transitions, 6813 flow. Second operand 13 states and 294 transitions. [2024-06-14 14:03:14,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 442 transitions, 8555 flow [2024-06-14 14:03:16,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 442 transitions, 8159 flow, removed 57 selfloop flow, removed 5 redundant places. [2024-06-14 14:03:16,205 INFO L231 Difference]: Finished difference. Result has 340 places, 407 transitions, 7123 flow [2024-06-14 14:03:16,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6449, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=222, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=7123, PETRI_PLACES=340, PETRI_TRANSITIONS=407} [2024-06-14 14:03:16,205 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 297 predicate places. [2024-06-14 14:03:16,205 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 407 transitions, 7123 flow [2024-06-14 14:03:16,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:16,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:03:16,206 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:03:16,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-14 14:03:16,206 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:03:16,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:03:16,206 INFO L85 PathProgramCache]: Analyzing trace with hash -547906796, now seen corresponding path program 2 times [2024-06-14 14:03:16,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:03:16,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169921192] [2024-06-14 14:03:16,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:03:16,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:03:16,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:03:16,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:03:16,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:03:16,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169921192] [2024-06-14 14:03:16,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169921192] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:03:16,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:03:16,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:03:16,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080676925] [2024-06-14 14:03:16,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:03:16,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:03:16,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:03:16,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:03:16,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:03:16,461 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:03:16,461 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 407 transitions, 7123 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:16,461 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:03:16,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:03:16,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:03:17,405 INFO L124 PetriNetUnfolderBase]: 2903/4938 cut-off events. [2024-06-14 14:03:17,405 INFO L125 PetriNetUnfolderBase]: For 564680/564680 co-relation queries the response was YES. [2024-06-14 14:03:17,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37886 conditions, 4938 events. 2903/4938 cut-off events. For 564680/564680 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 32744 event pairs, 669 based on Foata normal form. 1/4930 useless extension candidates. Maximal degree in co-relation 37732. Up to 3875 conditions per place. [2024-06-14 14:03:17,479 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 222 selfloop transitions, 203 changer transitions 0/432 dead transitions. [2024-06-14 14:03:17,479 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 432 transitions, 8472 flow [2024-06-14 14:03:17,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:03:17,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:03:17,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 224 transitions. [2024-06-14 14:03:17,480 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2024-06-14 14:03:17,480 INFO L175 Difference]: Start difference. First operand has 340 places, 407 transitions, 7123 flow. Second operand 10 states and 224 transitions. [2024-06-14 14:03:17,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 432 transitions, 8472 flow [2024-06-14 14:03:19,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 432 transitions, 7792 flow, removed 34 selfloop flow, removed 11 redundant places. [2024-06-14 14:03:19,538 INFO L231 Difference]: Finished difference. Result has 339 places, 410 transitions, 6931 flow [2024-06-14 14:03:19,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6447, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=200, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6931, PETRI_PLACES=339, PETRI_TRANSITIONS=410} [2024-06-14 14:03:19,539 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 296 predicate places. [2024-06-14 14:03:19,539 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 410 transitions, 6931 flow [2024-06-14 14:03:19,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:19,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:03:19,539 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:03:19,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-14 14:03:19,539 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:03:19,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:03:19,540 INFO L85 PathProgramCache]: Analyzing trace with hash -306532820, now seen corresponding path program 6 times [2024-06-14 14:03:19,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:03:19,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787145652] [2024-06-14 14:03:19,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:03:19,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:03:19,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:03:19,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:03:19,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:03:19,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787145652] [2024-06-14 14:03:19,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787145652] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:03:19,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:03:19,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:03:19,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217300065] [2024-06-14 14:03:19,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:03:19,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:03:19,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:03:19,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:03:19,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:03:19,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:03:19,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 410 transitions, 6931 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:19,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:03:19,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:03:19,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:03:20,842 INFO L124 PetriNetUnfolderBase]: 2908/4977 cut-off events. [2024-06-14 14:03:20,842 INFO L125 PetriNetUnfolderBase]: For 572745/572745 co-relation queries the response was YES. [2024-06-14 14:03:20,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37877 conditions, 4977 events. 2908/4977 cut-off events. For 572745/572745 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 33090 event pairs, 625 based on Foata normal form. 1/4976 useless extension candidates. Maximal degree in co-relation 37722. Up to 4244 conditions per place. [2024-06-14 14:03:20,915 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 310 selfloop transitions, 126 changer transitions 0/443 dead transitions. [2024-06-14 14:03:20,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 443 transitions, 8159 flow [2024-06-14 14:03:20,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:03:20,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:03:20,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 244 transitions. [2024-06-14 14:03:20,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5281385281385281 [2024-06-14 14:03:20,916 INFO L175 Difference]: Start difference. First operand has 339 places, 410 transitions, 6931 flow. Second operand 11 states and 244 transitions. [2024-06-14 14:03:20,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 443 transitions, 8159 flow [2024-06-14 14:03:23,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 443 transitions, 7708 flow, removed 36 selfloop flow, removed 7 redundant places. [2024-06-14 14:03:23,511 INFO L231 Difference]: Finished difference. Result has 344 places, 415 transitions, 6915 flow [2024-06-14 14:03:23,511 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6488, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6915, PETRI_PLACES=344, PETRI_TRANSITIONS=415} [2024-06-14 14:03:23,512 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 301 predicate places. [2024-06-14 14:03:23,512 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 415 transitions, 6915 flow [2024-06-14 14:03:23,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:23,512 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:03:23,512 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:03:23,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-14 14:03:23,512 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:03:23,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:03:23,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1085922738, now seen corresponding path program 7 times [2024-06-14 14:03:23,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:03:23,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191385035] [2024-06-14 14:03:23,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:03:23,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:03:23,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:03:23,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:03:23,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:03:23,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191385035] [2024-06-14 14:03:23,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191385035] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:03:23,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:03:23,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:03:23,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988414652] [2024-06-14 14:03:23,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:03:23,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:03:23,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:03:23,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:03:23,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:03:23,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:03:23,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 415 transitions, 6915 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:23,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:03:23,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:03:23,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:03:24,679 INFO L124 PetriNetUnfolderBase]: 2905/4965 cut-off events. [2024-06-14 14:03:24,680 INFO L125 PetriNetUnfolderBase]: For 576652/576652 co-relation queries the response was YES. [2024-06-14 14:03:24,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37645 conditions, 4965 events. 2905/4965 cut-off events. For 576652/576652 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 32986 event pairs, 615 based on Foata normal form. 1/4964 useless extension candidates. Maximal degree in co-relation 37488. Up to 3877 conditions per place. [2024-06-14 14:03:24,748 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 198 selfloop transitions, 236 changer transitions 0/441 dead transitions. [2024-06-14 14:03:24,748 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 441 transitions, 8225 flow [2024-06-14 14:03:24,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:03:24,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:03:24,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 250 transitions. [2024-06-14 14:03:24,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5411255411255411 [2024-06-14 14:03:24,749 INFO L175 Difference]: Start difference. First operand has 344 places, 415 transitions, 6915 flow. Second operand 11 states and 250 transitions. [2024-06-14 14:03:24,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 441 transitions, 8225 flow [2024-06-14 14:03:27,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 441 transitions, 8046 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-14 14:03:27,113 INFO L231 Difference]: Finished difference. Result has 349 places, 415 transitions, 7214 flow [2024-06-14 14:03:27,113 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6736, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=236, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7214, PETRI_PLACES=349, PETRI_TRANSITIONS=415} [2024-06-14 14:03:27,113 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 306 predicate places. [2024-06-14 14:03:27,113 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 415 transitions, 7214 flow [2024-06-14 14:03:27,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:27,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:03:27,114 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:03:27,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-14 14:03:27,114 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:03:27,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:03:27,114 INFO L85 PathProgramCache]: Analyzing trace with hash -249437366, now seen corresponding path program 8 times [2024-06-14 14:03:27,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:03:27,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930390912] [2024-06-14 14:03:27,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:03:27,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:03:27,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:03:27,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:03:27,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:03:27,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930390912] [2024-06-14 14:03:27,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930390912] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:03:27,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:03:27,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:03:27,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918757378] [2024-06-14 14:03:27,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:03:27,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:03:27,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:03:27,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:03:27,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:03:27,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:03:27,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 415 transitions, 7214 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:27,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:03:27,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:03:27,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:03:28,258 INFO L124 PetriNetUnfolderBase]: 2910/4974 cut-off events. [2024-06-14 14:03:28,258 INFO L125 PetriNetUnfolderBase]: For 590940/590940 co-relation queries the response was YES. [2024-06-14 14:03:28,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38217 conditions, 4974 events. 2910/4974 cut-off events. For 590940/590940 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 33056 event pairs, 615 based on Foata normal form. 1/4973 useless extension candidates. Maximal degree in co-relation 38059. Up to 3881 conditions per place. [2024-06-14 14:03:28,326 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 198 selfloop transitions, 239 changer transitions 0/444 dead transitions. [2024-06-14 14:03:28,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 444 transitions, 8597 flow [2024-06-14 14:03:28,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:03:28,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:03:28,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 251 transitions. [2024-06-14 14:03:28,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5432900432900433 [2024-06-14 14:03:28,328 INFO L175 Difference]: Start difference. First operand has 349 places, 415 transitions, 7214 flow. Second operand 11 states and 251 transitions. [2024-06-14 14:03:28,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 444 transitions, 8597 flow [2024-06-14 14:03:31,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 444 transitions, 8263 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-14 14:03:31,021 INFO L231 Difference]: Finished difference. Result has 353 places, 418 transitions, 7427 flow [2024-06-14 14:03:31,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6883, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=236, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7427, PETRI_PLACES=353, PETRI_TRANSITIONS=418} [2024-06-14 14:03:31,022 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 310 predicate places. [2024-06-14 14:03:31,022 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 418 transitions, 7427 flow [2024-06-14 14:03:31,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:31,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:03:31,023 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:03:31,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-14 14:03:31,023 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:03:31,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:03:31,023 INFO L85 PathProgramCache]: Analyzing trace with hash -1674954370, now seen corresponding path program 3 times [2024-06-14 14:03:31,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:03:31,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069698945] [2024-06-14 14:03:31,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:03:31,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:03:31,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:03:31,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:03:31,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:03:31,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069698945] [2024-06-14 14:03:31,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069698945] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:03:31,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:03:31,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:03:31,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669260955] [2024-06-14 14:03:31,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:03:31,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:03:31,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:03:31,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:03:31,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:03:31,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:03:31,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 418 transitions, 7427 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:31,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:03:31,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:03:31,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:03:32,139 INFO L124 PetriNetUnfolderBase]: 2915/4957 cut-off events. [2024-06-14 14:03:32,140 INFO L125 PetriNetUnfolderBase]: For 606315/606315 co-relation queries the response was YES. [2024-06-14 14:03:32,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38455 conditions, 4957 events. 2915/4957 cut-off events. For 606315/606315 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 32951 event pairs, 663 based on Foata normal form. 1/4949 useless extension candidates. Maximal degree in co-relation 38296. Up to 3885 conditions per place. [2024-06-14 14:03:32,206 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 222 selfloop transitions, 211 changer transitions 0/440 dead transitions. [2024-06-14 14:03:32,206 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 440 transitions, 8991 flow [2024-06-14 14:03:32,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:03:32,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:03:32,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 208 transitions. [2024-06-14 14:03:32,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5502645502645502 [2024-06-14 14:03:32,207 INFO L175 Difference]: Start difference. First operand has 353 places, 418 transitions, 7427 flow. Second operand 9 states and 208 transitions. [2024-06-14 14:03:32,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 440 transitions, 8991 flow [2024-06-14 14:03:34,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 440 transitions, 8455 flow, removed 13 selfloop flow, removed 10 redundant places. [2024-06-14 14:03:34,614 INFO L231 Difference]: Finished difference. Result has 352 places, 421 transitions, 7391 flow [2024-06-14 14:03:34,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6895, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=208, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7391, PETRI_PLACES=352, PETRI_TRANSITIONS=421} [2024-06-14 14:03:34,614 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 309 predicate places. [2024-06-14 14:03:34,614 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 421 transitions, 7391 flow [2024-06-14 14:03:34,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:34,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:03:34,615 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:03:34,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-14 14:03:34,615 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:03:34,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:03:34,615 INFO L85 PathProgramCache]: Analyzing trace with hash 1660494774, now seen corresponding path program 4 times [2024-06-14 14:03:34,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:03:34,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112588330] [2024-06-14 14:03:34,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:03:34,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:03:34,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:03:34,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:03:34,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:03:34,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112588330] [2024-06-14 14:03:34,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112588330] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:03:34,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:03:34,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:03:34,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949538482] [2024-06-14 14:03:34,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:03:34,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:03:34,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:03:34,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:03:34,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:03:34,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:03:34,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 421 transitions, 7391 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:34,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:03:34,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:03:34,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:03:35,712 INFO L124 PetriNetUnfolderBase]: 2912/4969 cut-off events. [2024-06-14 14:03:35,712 INFO L125 PetriNetUnfolderBase]: For 612210/612210 co-relation queries the response was YES. [2024-06-14 14:03:35,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38360 conditions, 4969 events. 2912/4969 cut-off events. For 612210/612210 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 33110 event pairs, 679 based on Foata normal form. 1/4961 useless extension candidates. Maximal degree in co-relation 38200. Up to 3883 conditions per place. [2024-06-14 14:03:35,784 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 226 selfloop transitions, 206 changer transitions 0/439 dead transitions. [2024-06-14 14:03:35,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 439 transitions, 8689 flow [2024-06-14 14:03:35,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:03:35,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:03:35,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 206 transitions. [2024-06-14 14:03:35,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.544973544973545 [2024-06-14 14:03:35,785 INFO L175 Difference]: Start difference. First operand has 352 places, 421 transitions, 7391 flow. Second operand 9 states and 206 transitions. [2024-06-14 14:03:35,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 439 transitions, 8689 flow [2024-06-14 14:03:38,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 439 transitions, 8171 flow, removed 43 selfloop flow, removed 7 redundant places. [2024-06-14 14:03:38,135 INFO L231 Difference]: Finished difference. Result has 354 places, 421 transitions, 7293 flow [2024-06-14 14:03:38,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6873, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=206, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7293, PETRI_PLACES=354, PETRI_TRANSITIONS=421} [2024-06-14 14:03:38,136 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 311 predicate places. [2024-06-14 14:03:38,136 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 421 transitions, 7293 flow [2024-06-14 14:03:38,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:38,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:03:38,136 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:03:38,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-14 14:03:38,136 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:03:38,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:03:38,137 INFO L85 PathProgramCache]: Analyzing trace with hash -1380517264, now seen corresponding path program 5 times [2024-06-14 14:03:38,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:03:38,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41379404] [2024-06-14 14:03:38,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:03:38,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:03:38,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:03:38,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:03:38,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:03:38,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41379404] [2024-06-14 14:03:38,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41379404] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:03:38,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:03:38,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:03:38,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93563140] [2024-06-14 14:03:38,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:03:38,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:03:38,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:03:38,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:03:38,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:03:38,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:03:38,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 421 transitions, 7293 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:38,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:03:38,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:03:38,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:03:39,211 INFO L124 PetriNetUnfolderBase]: 2917/4986 cut-off events. [2024-06-14 14:03:39,211 INFO L125 PetriNetUnfolderBase]: For 623196/623196 co-relation queries the response was YES. [2024-06-14 14:03:39,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38479 conditions, 4986 events. 2917/4986 cut-off events. For 623196/623196 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 33258 event pairs, 638 based on Foata normal form. 1/4984 useless extension candidates. Maximal degree in co-relation 38318. Up to 4141 conditions per place. [2024-06-14 14:03:39,278 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 311 selfloop transitions, 125 changer transitions 0/443 dead transitions. [2024-06-14 14:03:39,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 443 transitions, 8734 flow [2024-06-14 14:03:39,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:03:39,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:03:39,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-14 14:03:39,280 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5505952380952381 [2024-06-14 14:03:39,280 INFO L175 Difference]: Start difference. First operand has 354 places, 421 transitions, 7293 flow. Second operand 8 states and 185 transitions. [2024-06-14 14:03:39,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 443 transitions, 8734 flow [2024-06-14 14:03:41,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 443 transitions, 8293 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-14 14:03:41,833 INFO L231 Difference]: Finished difference. Result has 355 places, 426 transitions, 7345 flow [2024-06-14 14:03:41,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6858, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7345, PETRI_PLACES=355, PETRI_TRANSITIONS=426} [2024-06-14 14:03:41,833 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 312 predicate places. [2024-06-14 14:03:41,833 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 426 transitions, 7345 flow [2024-06-14 14:03:41,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:41,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:03:41,834 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:03:41,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-14 14:03:41,834 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:03:41,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:03:41,834 INFO L85 PathProgramCache]: Analyzing trace with hash -838497476, now seen corresponding path program 9 times [2024-06-14 14:03:41,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:03:41,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177151372] [2024-06-14 14:03:41,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:03:41,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:03:41,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:03:42,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:03:42,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:03:42,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177151372] [2024-06-14 14:03:42,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177151372] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:03:42,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:03:42,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:03:42,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264237512] [2024-06-14 14:03:42,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:03:42,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:03:42,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:03:42,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:03:42,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:03:42,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:03:42,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 426 transitions, 7345 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:42,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:03:42,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:03:42,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:03:43,034 INFO L124 PetriNetUnfolderBase]: 2908/4979 cut-off events. [2024-06-14 14:03:43,034 INFO L125 PetriNetUnfolderBase]: For 627166/627166 co-relation queries the response was YES. [2024-06-14 14:03:43,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38230 conditions, 4979 events. 2908/4979 cut-off events. For 627166/627166 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 33186 event pairs, 614 based on Foata normal form. 3/4980 useless extension candidates. Maximal degree in co-relation 38067. Up to 4347 conditions per place. [2024-06-14 14:03:43,110 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 375 selfloop transitions, 75 changer transitions 0/457 dead transitions. [2024-06-14 14:03:43,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 457 transitions, 8523 flow [2024-06-14 14:03:43,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:03:43,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:03:43,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-14 14:03:43,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5982142857142857 [2024-06-14 14:03:43,111 INFO L175 Difference]: Start difference. First operand has 355 places, 426 transitions, 7345 flow. Second operand 8 states and 201 transitions. [2024-06-14 14:03:43,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 457 transitions, 8523 flow [2024-06-14 14:03:45,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 457 transitions, 8318 flow, removed 41 selfloop flow, removed 5 redundant places. [2024-06-14 14:03:45,782 INFO L231 Difference]: Finished difference. Result has 358 places, 426 transitions, 7305 flow [2024-06-14 14:03:45,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7140, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7305, PETRI_PLACES=358, PETRI_TRANSITIONS=426} [2024-06-14 14:03:45,783 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 315 predicate places. [2024-06-14 14:03:45,783 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 426 transitions, 7305 flow [2024-06-14 14:03:45,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:45,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:03:45,783 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:03:45,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-14 14:03:45,783 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:03:45,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:03:45,784 INFO L85 PathProgramCache]: Analyzing trace with hash -2073156896, now seen corresponding path program 6 times [2024-06-14 14:03:45,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:03:45,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529968918] [2024-06-14 14:03:45,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:03:45,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:03:45,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:03:45,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:03:45,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:03:45,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529968918] [2024-06-14 14:03:45,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529968918] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:03:45,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:03:45,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:03:45,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983932651] [2024-06-14 14:03:45,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:03:45,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:03:45,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:03:45,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:03:45,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:03:46,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:03:46,056 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 426 transitions, 7305 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:46,056 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:03:46,056 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:03:46,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:03:46,912 INFO L124 PetriNetUnfolderBase]: 2913/4975 cut-off events. [2024-06-14 14:03:46,912 INFO L125 PetriNetUnfolderBase]: For 630551/630551 co-relation queries the response was YES. [2024-06-14 14:03:46,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38257 conditions, 4975 events. 2913/4975 cut-off events. For 630551/630551 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 33118 event pairs, 632 based on Foata normal form. 1/4973 useless extension candidates. Maximal degree in co-relation 38094. Up to 4138 conditions per place. [2024-06-14 14:03:46,978 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 318 selfloop transitions, 126 changer transitions 0/451 dead transitions. [2024-06-14 14:03:46,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 451 transitions, 8722 flow [2024-06-14 14:03:46,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:03:46,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:03:46,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-14 14:03:46,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5918367346938775 [2024-06-14 14:03:46,980 INFO L175 Difference]: Start difference. First operand has 358 places, 426 transitions, 7305 flow. Second operand 7 states and 174 transitions. [2024-06-14 14:03:46,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 451 transitions, 8722 flow [2024-06-14 14:03:49,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 451 transitions, 8562 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-14 14:03:49,912 INFO L231 Difference]: Finished difference. Result has 358 places, 429 transitions, 7480 flow [2024-06-14 14:03:49,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7149, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7480, PETRI_PLACES=358, PETRI_TRANSITIONS=429} [2024-06-14 14:03:49,913 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 315 predicate places. [2024-06-14 14:03:49,913 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 429 transitions, 7480 flow [2024-06-14 14:03:49,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:49,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:03:49,914 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:03:49,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-14 14:03:49,914 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:03:49,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:03:49,914 INFO L85 PathProgramCache]: Analyzing trace with hash 1738893352, now seen corresponding path program 10 times [2024-06-14 14:03:49,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:03:49,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32733296] [2024-06-14 14:03:49,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:03:49,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:03:49,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:03:50,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:03:50,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:03:50,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32733296] [2024-06-14 14:03:50,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32733296] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:03:50,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:03:50,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:03:50,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718101524] [2024-06-14 14:03:50,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:03:50,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:03:50,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:03:50,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:03:50,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:03:50,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:03:50,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 429 transitions, 7480 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:50,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:03:50,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:03:50,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:03:51,083 INFO L124 PetriNetUnfolderBase]: 2904/4972 cut-off events. [2024-06-14 14:03:51,083 INFO L125 PetriNetUnfolderBase]: For 625815/625815 co-relation queries the response was YES. [2024-06-14 14:03:51,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38031 conditions, 4972 events. 2904/4972 cut-off events. For 625815/625815 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 33146 event pairs, 612 based on Foata normal form. 3/4973 useless extension candidates. Maximal degree in co-relation 37868. Up to 4345 conditions per place. [2024-06-14 14:03:51,151 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 373 selfloop transitions, 75 changer transitions 0/455 dead transitions. [2024-06-14 14:03:51,151 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 455 transitions, 8442 flow [2024-06-14 14:03:51,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:03:51,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:03:51,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-14 14:03:51,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6020408163265306 [2024-06-14 14:03:51,152 INFO L175 Difference]: Start difference. First operand has 358 places, 429 transitions, 7480 flow. Second operand 7 states and 177 transitions. [2024-06-14 14:03:51,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 455 transitions, 8442 flow [2024-06-14 14:03:54,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 455 transitions, 8152 flow, removed 37 selfloop flow, removed 4 redundant places. [2024-06-14 14:03:54,333 INFO L231 Difference]: Finished difference. Result has 361 places, 429 transitions, 7355 flow [2024-06-14 14:03:54,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7190, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7355, PETRI_PLACES=361, PETRI_TRANSITIONS=429} [2024-06-14 14:03:54,333 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 318 predicate places. [2024-06-14 14:03:54,333 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 429 transitions, 7355 flow [2024-06-14 14:03:54,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:54,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:03:54,333 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:03:54,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-14 14:03:54,334 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:03:54,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:03:54,334 INFO L85 PathProgramCache]: Analyzing trace with hash 1044337016, now seen corresponding path program 7 times [2024-06-14 14:03:54,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:03:54,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671958042] [2024-06-14 14:03:54,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:03:54,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:03:54,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:03:54,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:03:54,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:03:54,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671958042] [2024-06-14 14:03:54,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671958042] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:03:54,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:03:54,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:03:54,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557742586] [2024-06-14 14:03:54,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:03:54,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:03:54,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:03:54,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:03:54,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:03:54,565 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:03:54,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 429 transitions, 7355 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:54,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:03:54,566 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:03:54,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:03:55,472 INFO L124 PetriNetUnfolderBase]: 2901/4959 cut-off events. [2024-06-14 14:03:55,472 INFO L125 PetriNetUnfolderBase]: For 620292/620292 co-relation queries the response was YES. [2024-06-14 14:03:55,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37790 conditions, 4959 events. 2901/4959 cut-off events. For 620292/620292 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 33042 event pairs, 632 based on Foata normal form. 1/4957 useless extension candidates. Maximal degree in co-relation 37626. Up to 4129 conditions per place. [2024-06-14 14:03:55,544 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 315 selfloop transitions, 125 changer transitions 0/447 dead transitions. [2024-06-14 14:03:55,544 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 447 transitions, 8483 flow [2024-06-14 14:03:55,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:03:55,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:03:55,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-14 14:03:55,545 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5782312925170068 [2024-06-14 14:03:55,545 INFO L175 Difference]: Start difference. First operand has 361 places, 429 transitions, 7355 flow. Second operand 7 states and 170 transitions. [2024-06-14 14:03:55,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 447 transitions, 8483 flow [2024-06-14 14:03:58,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 447 transitions, 8268 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-14 14:03:58,658 INFO L231 Difference]: Finished difference. Result has 362 places, 429 transitions, 7396 flow [2024-06-14 14:03:58,659 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7140, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7396, PETRI_PLACES=362, PETRI_TRANSITIONS=429} [2024-06-14 14:03:58,659 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 319 predicate places. [2024-06-14 14:03:58,659 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 429 transitions, 7396 flow [2024-06-14 14:03:58,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:58,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:03:58,659 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:03:58,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-14 14:03:58,659 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:03:58,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:03:58,660 INFO L85 PathProgramCache]: Analyzing trace with hash 377893220, now seen corresponding path program 1 times [2024-06-14 14:03:58,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:03:58,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561971228] [2024-06-14 14:03:58,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:03:58,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:03:58,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:03:58,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:03:58,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:03:58,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561971228] [2024-06-14 14:03:58,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561971228] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:03:58,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:03:58,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:03:58,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639928466] [2024-06-14 14:03:58,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:03:58,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:03:58,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:03:58,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:03:58,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:03:58,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:03:58,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 429 transitions, 7396 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:58,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:03:58,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:03:58,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:03:59,830 INFO L124 PetriNetUnfolderBase]: 2888/4944 cut-off events. [2024-06-14 14:03:59,831 INFO L125 PetriNetUnfolderBase]: For 627550/627550 co-relation queries the response was YES. [2024-06-14 14:03:59,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37326 conditions, 4944 events. 2888/4944 cut-off events. For 627550/627550 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 32967 event pairs, 495 based on Foata normal form. 6/4947 useless extension candidates. Maximal degree in co-relation 37161. Up to 4245 conditions per place. [2024-06-14 14:03:59,900 INFO L140 encePairwiseOnDemand]: 36/42 looper letters, 417 selfloop transitions, 24 changer transitions 1/449 dead transitions. [2024-06-14 14:03:59,900 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 449 transitions, 8374 flow [2024-06-14 14:03:59,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 14:03:59,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 14:03:59,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 126 transitions. [2024-06-14 14:03:59,901 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-14 14:03:59,901 INFO L175 Difference]: Start difference. First operand has 362 places, 429 transitions, 7396 flow. Second operand 5 states and 126 transitions. [2024-06-14 14:03:59,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 449 transitions, 8374 flow [2024-06-14 14:04:02,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 449 transitions, 7923 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-14 14:04:02,927 INFO L231 Difference]: Finished difference. Result has 357 places, 429 transitions, 6998 flow [2024-06-14 14:04:02,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6945, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=6998, PETRI_PLACES=357, PETRI_TRANSITIONS=429} [2024-06-14 14:04:02,928 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 314 predicate places. [2024-06-14 14:04:02,928 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 429 transitions, 6998 flow [2024-06-14 14:04:02,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:02,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:02,928 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:04:02,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-14 14:04:02,928 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:04:02,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:02,929 INFO L85 PathProgramCache]: Analyzing trace with hash -99724504, now seen corresponding path program 1 times [2024-06-14 14:04:02,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:02,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364100159] [2024-06-14 14:04:02,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:02,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:02,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:03,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:03,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:03,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364100159] [2024-06-14 14:04:03,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364100159] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:03,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:03,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:04:03,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600586728] [2024-06-14 14:04:03,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:03,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:04:03,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:03,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:04:03,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:04:03,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:04:03,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 429 transitions, 6998 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:03,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:03,207 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:04:03,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:04,198 INFO L124 PetriNetUnfolderBase]: 2935/5003 cut-off events. [2024-06-14 14:04:04,198 INFO L125 PetriNetUnfolderBase]: For 647124/647124 co-relation queries the response was YES. [2024-06-14 14:04:04,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38246 conditions, 5003 events. 2935/5003 cut-off events. For 647124/647124 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 33297 event pairs, 597 based on Foata normal form. 2/4992 useless extension candidates. Maximal degree in co-relation 38081. Up to 4402 conditions per place. [2024-06-14 14:04:04,264 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 397 selfloop transitions, 61 changer transitions 0/465 dead transitions. [2024-06-14 14:04:04,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 465 transitions, 8372 flow [2024-06-14 14:04:04,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:04:04,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:04:04,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 205 transitions. [2024-06-14 14:04:04,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5423280423280423 [2024-06-14 14:04:04,265 INFO L175 Difference]: Start difference. First operand has 357 places, 429 transitions, 6998 flow. Second operand 9 states and 205 transitions. [2024-06-14 14:04:04,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 465 transitions, 8372 flow [2024-06-14 14:04:07,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 465 transitions, 8309 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-14 14:04:07,572 INFO L231 Difference]: Finished difference. Result has 363 places, 437 transitions, 7274 flow [2024-06-14 14:04:07,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6935, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7274, PETRI_PLACES=363, PETRI_TRANSITIONS=437} [2024-06-14 14:04:07,573 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 320 predicate places. [2024-06-14 14:04:07,573 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 437 transitions, 7274 flow [2024-06-14 14:04:07,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:07,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:07,573 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:04:07,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-14 14:04:07,574 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:04:07,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:07,574 INFO L85 PathProgramCache]: Analyzing trace with hash -1679593830, now seen corresponding path program 2 times [2024-06-14 14:04:07,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:07,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577006647] [2024-06-14 14:04:07,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:07,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:07,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:07,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:07,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:07,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577006647] [2024-06-14 14:04:07,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577006647] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:07,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:07,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:04:07,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654179909] [2024-06-14 14:04:07,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:07,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:04:07,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:07,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:04:07,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:04:07,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:04:07,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 437 transitions, 7274 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:07,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:07,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:04:07,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:08,871 INFO L124 PetriNetUnfolderBase]: 2930/5010 cut-off events. [2024-06-14 14:04:08,872 INFO L125 PetriNetUnfolderBase]: For 649039/649039 co-relation queries the response was YES. [2024-06-14 14:04:08,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38301 conditions, 5010 events. 2930/5010 cut-off events. For 649039/649039 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 33407 event pairs, 612 based on Foata normal form. 2/5008 useless extension candidates. Maximal degree in co-relation 38134. Up to 4281 conditions per place. [2024-06-14 14:04:08,951 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 322 selfloop transitions, 132 changer transitions 0/461 dead transitions. [2024-06-14 14:04:08,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 461 transitions, 8240 flow [2024-06-14 14:04:08,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:04:08,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:04:08,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 224 transitions. [2024-06-14 14:04:08,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2024-06-14 14:04:08,953 INFO L175 Difference]: Start difference. First operand has 363 places, 437 transitions, 7274 flow. Second operand 10 states and 224 transitions. [2024-06-14 14:04:08,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 461 transitions, 8240 flow [2024-06-14 14:04:11,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 461 transitions, 8077 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-14 14:04:11,769 INFO L231 Difference]: Finished difference. Result has 367 places, 437 transitions, 7380 flow [2024-06-14 14:04:11,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7111, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7380, PETRI_PLACES=367, PETRI_TRANSITIONS=437} [2024-06-14 14:04:11,770 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 324 predicate places. [2024-06-14 14:04:11,770 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 437 transitions, 7380 flow [2024-06-14 14:04:11,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:11,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:11,770 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:04:11,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-14 14:04:11,771 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:04:11,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:11,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1409096950, now seen corresponding path program 3 times [2024-06-14 14:04:11,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:11,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757089843] [2024-06-14 14:04:11,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:11,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:11,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:12,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:12,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:12,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757089843] [2024-06-14 14:04:12,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757089843] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:12,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:12,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:04:12,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629132403] [2024-06-14 14:04:12,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:12,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:04:12,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:12,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:04:12,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:04:12,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:04:12,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 437 transitions, 7380 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:12,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:12,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:04:12,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:13,158 INFO L124 PetriNetUnfolderBase]: 2938/5030 cut-off events. [2024-06-14 14:04:13,159 INFO L125 PetriNetUnfolderBase]: For 661671/661671 co-relation queries the response was YES. [2024-06-14 14:04:13,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38595 conditions, 5030 events. 2938/5030 cut-off events. For 661671/661671 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 33550 event pairs, 620 based on Foata normal form. 2/5028 useless extension candidates. Maximal degree in co-relation 38427. Up to 4293 conditions per place. [2024-06-14 14:04:13,231 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 326 selfloop transitions, 131 changer transitions 0/464 dead transitions. [2024-06-14 14:04:13,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 464 transitions, 8397 flow [2024-06-14 14:04:13,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:04:13,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:04:13,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 242 transitions. [2024-06-14 14:04:13,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-06-14 14:04:13,233 INFO L175 Difference]: Start difference. First operand has 367 places, 437 transitions, 7380 flow. Second operand 11 states and 242 transitions. [2024-06-14 14:04:13,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 464 transitions, 8397 flow [2024-06-14 14:04:15,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 464 transitions, 8213 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-14 14:04:15,947 INFO L231 Difference]: Finished difference. Result has 373 places, 439 transitions, 7510 flow [2024-06-14 14:04:15,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7196, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7510, PETRI_PLACES=373, PETRI_TRANSITIONS=439} [2024-06-14 14:04:15,947 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 330 predicate places. [2024-06-14 14:04:15,947 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 439 transitions, 7510 flow [2024-06-14 14:04:15,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:15,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:15,948 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:04:15,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-14 14:04:15,948 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:04:15,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:15,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1633958764, now seen corresponding path program 4 times [2024-06-14 14:04:15,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:15,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485474045] [2024-06-14 14:04:15,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:15,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:15,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:16,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:16,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:16,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485474045] [2024-06-14 14:04:16,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485474045] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:16,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:16,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:04:16,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300531252] [2024-06-14 14:04:16,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:16,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:04:16,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:16,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:04:16,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:04:16,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:04:16,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 439 transitions, 7510 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:16,242 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:16,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:04:16,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:17,214 INFO L124 PetriNetUnfolderBase]: 2986/5104 cut-off events. [2024-06-14 14:04:17,214 INFO L125 PetriNetUnfolderBase]: For 720884/720884 co-relation queries the response was YES. [2024-06-14 14:04:17,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39063 conditions, 5104 events. 2986/5104 cut-off events. For 720884/720884 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 34122 event pairs, 611 based on Foata normal form. 12/5112 useless extension candidates. Maximal degree in co-relation 38894. Up to 4372 conditions per place. [2024-06-14 14:04:17,288 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 413 selfloop transitions, 55 changer transitions 0/475 dead transitions. [2024-06-14 14:04:17,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 475 transitions, 8632 flow [2024-06-14 14:04:17,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:04:17,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:04:17,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-14 14:04:17,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6156462585034014 [2024-06-14 14:04:17,289 INFO L175 Difference]: Start difference. First operand has 373 places, 439 transitions, 7510 flow. Second operand 7 states and 181 transitions. [2024-06-14 14:04:17,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 475 transitions, 8632 flow [2024-06-14 14:04:20,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 475 transitions, 8356 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-14 14:04:20,864 INFO L231 Difference]: Finished difference. Result has 372 places, 443 transitions, 7447 flow [2024-06-14 14:04:20,865 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7234, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7447, PETRI_PLACES=372, PETRI_TRANSITIONS=443} [2024-06-14 14:04:20,865 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 329 predicate places. [2024-06-14 14:04:20,865 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 443 transitions, 7447 flow [2024-06-14 14:04:20,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:20,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:20,865 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:04:20,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-14 14:04:20,865 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:04:20,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:20,866 INFO L85 PathProgramCache]: Analyzing trace with hash -1902830616, now seen corresponding path program 11 times [2024-06-14 14:04:20,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:20,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853797141] [2024-06-14 14:04:20,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:20,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:20,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:21,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:21,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:21,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853797141] [2024-06-14 14:04:21,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853797141] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:21,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:21,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:04:21,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376275797] [2024-06-14 14:04:21,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:21,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:04:21,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:21,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:04:21,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:04:21,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:04:21,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 443 transitions, 7447 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:21,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:21,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:04:21,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:22,247 INFO L124 PetriNetUnfolderBase]: 2991/5112 cut-off events. [2024-06-14 14:04:22,247 INFO L125 PetriNetUnfolderBase]: For 669379/669383 co-relation queries the response was YES. [2024-06-14 14:04:22,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39162 conditions, 5112 events. 2991/5112 cut-off events. For 669379/669383 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 34292 event pairs, 655 based on Foata normal form. 5/5114 useless extension candidates. Maximal degree in co-relation 38992. Up to 4010 conditions per place. [2024-06-14 14:04:22,321 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 245 selfloop transitions, 220 changer transitions 0/472 dead transitions. [2024-06-14 14:04:22,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 472 transitions, 8946 flow [2024-06-14 14:04:22,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:04:22,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:04:22,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 246 transitions. [2024-06-14 14:04:22,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5324675324675324 [2024-06-14 14:04:22,323 INFO L175 Difference]: Start difference. First operand has 372 places, 443 transitions, 7447 flow. Second operand 11 states and 246 transitions. [2024-06-14 14:04:22,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 472 transitions, 8946 flow [2024-06-14 14:04:25,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 472 transitions, 8809 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-14 14:04:25,093 INFO L231 Difference]: Finished difference. Result has 378 places, 446 transitions, 7831 flow [2024-06-14 14:04:25,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7310, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=217, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7831, PETRI_PLACES=378, PETRI_TRANSITIONS=446} [2024-06-14 14:04:25,093 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 335 predicate places. [2024-06-14 14:04:25,093 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 446 transitions, 7831 flow [2024-06-14 14:04:25,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:25,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:25,094 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:04:25,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-14 14:04:25,094 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:04:25,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:25,094 INFO L85 PathProgramCache]: Analyzing trace with hash 977088872, now seen corresponding path program 12 times [2024-06-14 14:04:25,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:25,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726206078] [2024-06-14 14:04:25,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:25,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:25,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:25,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:25,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:25,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726206078] [2024-06-14 14:04:25,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726206078] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:25,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:25,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:04:25,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205758144] [2024-06-14 14:04:25,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:25,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:04:25,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:25,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:04:25,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:04:25,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:04:25,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 446 transitions, 7831 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:25,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:25,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:04:25,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:26,287 INFO L124 PetriNetUnfolderBase]: 2988/5104 cut-off events. [2024-06-14 14:04:26,287 INFO L125 PetriNetUnfolderBase]: For 678415/678419 co-relation queries the response was YES. [2024-06-14 14:04:26,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39408 conditions, 5104 events. 2988/5104 cut-off events. For 678415/678419 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 34148 event pairs, 653 based on Foata normal form. 5/5106 useless extension candidates. Maximal degree in co-relation 39237. Up to 4008 conditions per place. [2024-06-14 14:04:26,363 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 245 selfloop transitions, 216 changer transitions 0/468 dead transitions. [2024-06-14 14:04:26,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 468 transitions, 9241 flow [2024-06-14 14:04:26,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:04:26,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:04:26,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 227 transitions. [2024-06-14 14:04:26,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5404761904761904 [2024-06-14 14:04:26,364 INFO L175 Difference]: Start difference. First operand has 378 places, 446 transitions, 7831 flow. Second operand 10 states and 227 transitions. [2024-06-14 14:04:26,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 468 transitions, 9241 flow [2024-06-14 14:04:29,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 468 transitions, 8893 flow, removed 73 selfloop flow, removed 5 redundant places. [2024-06-14 14:04:29,737 INFO L231 Difference]: Finished difference. Result has 383 places, 446 transitions, 7921 flow [2024-06-14 14:04:29,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7483, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=446, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=216, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7921, PETRI_PLACES=383, PETRI_TRANSITIONS=446} [2024-06-14 14:04:29,737 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 340 predicate places. [2024-06-14 14:04:29,738 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 446 transitions, 7921 flow [2024-06-14 14:04:29,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:29,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:29,738 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:04:29,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-14 14:04:29,738 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:04:29,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:29,739 INFO L85 PathProgramCache]: Analyzing trace with hash -1593148366, now seen corresponding path program 13 times [2024-06-14 14:04:29,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:29,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786312214] [2024-06-14 14:04:29,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:29,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:29,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:29,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:29,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:29,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786312214] [2024-06-14 14:04:29,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786312214] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:29,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:29,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:04:29,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317414571] [2024-06-14 14:04:29,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:29,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:04:29,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:29,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:04:29,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:04:30,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:04:30,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 446 transitions, 7921 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:30,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:30,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:04:30,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:31,072 INFO L124 PetriNetUnfolderBase]: 3001/5100 cut-off events. [2024-06-14 14:04:31,073 INFO L125 PetriNetUnfolderBase]: For 698494/698494 co-relation queries the response was YES. [2024-06-14 14:04:31,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39713 conditions, 5100 events. 3001/5100 cut-off events. For 698494/698494 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 34013 event pairs, 659 based on Foata normal form. 1/5093 useless extension candidates. Maximal degree in co-relation 39541. Up to 4416 conditions per place. [2024-06-14 14:04:31,143 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 370 selfloop transitions, 102 changer transitions 0/479 dead transitions. [2024-06-14 14:04:31,143 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 479 transitions, 9248 flow [2024-06-14 14:04:31,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 14:04:31,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 14:04:31,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 263 transitions. [2024-06-14 14:04:31,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5218253968253969 [2024-06-14 14:04:31,144 INFO L175 Difference]: Start difference. First operand has 383 places, 446 transitions, 7921 flow. Second operand 12 states and 263 transitions. [2024-06-14 14:04:31,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 479 transitions, 9248 flow [2024-06-14 14:04:34,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 479 transitions, 8813 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-14 14:04:34,169 INFO L231 Difference]: Finished difference. Result has 389 places, 450 transitions, 7807 flow [2024-06-14 14:04:34,170 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7492, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=446, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7807, PETRI_PLACES=389, PETRI_TRANSITIONS=450} [2024-06-14 14:04:34,170 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 346 predicate places. [2024-06-14 14:04:34,170 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 450 transitions, 7807 flow [2024-06-14 14:04:34,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:34,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:34,171 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:04:34,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-14 14:04:34,171 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:04:34,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:34,171 INFO L85 PathProgramCache]: Analyzing trace with hash 509100622, now seen corresponding path program 14 times [2024-06-14 14:04:34,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:34,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24739898] [2024-06-14 14:04:34,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:34,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:34,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:34,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:34,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:34,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24739898] [2024-06-14 14:04:34,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24739898] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:34,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:34,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:04:34,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420152847] [2024-06-14 14:04:34,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:34,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:04:34,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:34,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:04:34,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:04:34,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:04:34,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 450 transitions, 7807 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:34,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:34,491 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:04:34,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:35,478 INFO L124 PetriNetUnfolderBase]: 3006/5114 cut-off events. [2024-06-14 14:04:35,478 INFO L125 PetriNetUnfolderBase]: For 707583/707583 co-relation queries the response was YES. [2024-06-14 14:04:35,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39617 conditions, 5114 events. 3006/5114 cut-off events. For 707583/707583 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 34195 event pairs, 669 based on Foata normal form. 1/5106 useless extension candidates. Maximal degree in co-relation 39443. Up to 4025 conditions per place. [2024-06-14 14:04:35,558 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 242 selfloop transitions, 230 changer transitions 0/479 dead transitions. [2024-06-14 14:04:35,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 479 transitions, 9120 flow [2024-06-14 14:04:35,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 14:04:35,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 14:04:35,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 263 transitions. [2024-06-14 14:04:35,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5218253968253969 [2024-06-14 14:04:35,559 INFO L175 Difference]: Start difference. First operand has 389 places, 450 transitions, 7807 flow. Second operand 12 states and 263 transitions. [2024-06-14 14:04:35,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 479 transitions, 9120 flow [2024-06-14 14:04:38,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 479 transitions, 8807 flow, removed 45 selfloop flow, removed 11 redundant places. [2024-06-14 14:04:38,435 INFO L231 Difference]: Finished difference. Result has 390 places, 453 transitions, 8047 flow [2024-06-14 14:04:38,435 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7521, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=227, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8047, PETRI_PLACES=390, PETRI_TRANSITIONS=453} [2024-06-14 14:04:38,435 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 347 predicate places. [2024-06-14 14:04:38,436 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 453 transitions, 8047 flow [2024-06-14 14:04:38,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:38,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:38,436 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:04:38,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-14 14:04:38,436 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:04:38,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:38,436 INFO L85 PathProgramCache]: Analyzing trace with hash -438438766, now seen corresponding path program 15 times [2024-06-14 14:04:38,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:38,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677810389] [2024-06-14 14:04:38,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:38,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:38,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:38,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:38,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:38,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677810389] [2024-06-14 14:04:38,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677810389] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:38,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:38,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:04:38,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332787145] [2024-06-14 14:04:38,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:38,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:04:38,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:38,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:04:38,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:04:38,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:04:38,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 453 transitions, 8047 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:38,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:38,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:04:38,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:39,695 INFO L124 PetriNetUnfolderBase]: 3003/5106 cut-off events. [2024-06-14 14:04:39,695 INFO L125 PetriNetUnfolderBase]: For 715166/715166 co-relation queries the response was YES. [2024-06-14 14:04:39,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39797 conditions, 5106 events. 3003/5106 cut-off events. For 715166/715166 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 34135 event pairs, 663 based on Foata normal form. 1/5098 useless extension candidates. Maximal degree in co-relation 39623. Up to 4023 conditions per place. [2024-06-14 14:04:39,769 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 239 selfloop transitions, 230 changer transitions 0/476 dead transitions. [2024-06-14 14:04:39,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 476 transitions, 9487 flow [2024-06-14 14:04:39,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:04:39,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:04:39,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 246 transitions. [2024-06-14 14:04:39,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5324675324675324 [2024-06-14 14:04:39,770 INFO L175 Difference]: Start difference. First operand has 390 places, 453 transitions, 8047 flow. Second operand 11 states and 246 transitions. [2024-06-14 14:04:39,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 476 transitions, 9487 flow [2024-06-14 14:04:43,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 476 transitions, 8995 flow, removed 17 selfloop flow, removed 10 redundant places. [2024-06-14 14:04:43,261 INFO L231 Difference]: Finished difference. Result has 391 places, 453 transitions, 8021 flow [2024-06-14 14:04:43,261 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7555, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=453, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=230, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8021, PETRI_PLACES=391, PETRI_TRANSITIONS=453} [2024-06-14 14:04:43,261 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 348 predicate places. [2024-06-14 14:04:43,261 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 453 transitions, 8021 flow [2024-06-14 14:04:43,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:43,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:43,262 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:04:43,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-14 14:04:43,262 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:04:43,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:43,262 INFO L85 PathProgramCache]: Analyzing trace with hash -438646156, now seen corresponding path program 16 times [2024-06-14 14:04:43,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:43,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633682060] [2024-06-14 14:04:43,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:43,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:43,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:43,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:43,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:43,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633682060] [2024-06-14 14:04:43,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633682060] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:43,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:43,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:04:43,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152127861] [2024-06-14 14:04:43,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:43,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:04:43,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:43,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:04:43,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:04:43,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:04:43,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 453 transitions, 8021 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:43,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:43,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:04:43,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:44,482 INFO L124 PetriNetUnfolderBase]: 3000/5110 cut-off events. [2024-06-14 14:04:44,482 INFO L125 PetriNetUnfolderBase]: For 720761/720761 co-relation queries the response was YES. [2024-06-14 14:04:44,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39732 conditions, 5110 events. 3000/5110 cut-off events. For 720761/720761 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 34176 event pairs, 671 based on Foata normal form. 1/5102 useless extension candidates. Maximal degree in co-relation 39557. Up to 4021 conditions per place. [2024-06-14 14:04:44,558 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 241 selfloop transitions, 227 changer transitions 0/475 dead transitions. [2024-06-14 14:04:44,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 475 transitions, 9235 flow [2024-06-14 14:04:44,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:04:44,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:04:44,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 244 transitions. [2024-06-14 14:04:44,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5281385281385281 [2024-06-14 14:04:44,559 INFO L175 Difference]: Start difference. First operand has 391 places, 453 transitions, 8021 flow. Second operand 11 states and 244 transitions. [2024-06-14 14:04:44,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 475 transitions, 9235 flow [2024-06-14 14:04:47,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 475 transitions, 8901 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-14 14:04:47,764 INFO L231 Difference]: Finished difference. Result has 395 places, 453 transitions, 8147 flow [2024-06-14 14:04:47,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7687, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=453, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=227, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8147, PETRI_PLACES=395, PETRI_TRANSITIONS=453} [2024-06-14 14:04:47,764 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 352 predicate places. [2024-06-14 14:04:47,764 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 453 transitions, 8147 flow [2024-06-14 14:04:47,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:47,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:47,765 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:04:47,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-14 14:04:47,765 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:04:47,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:47,765 INFO L85 PathProgramCache]: Analyzing trace with hash -1428801896, now seen corresponding path program 17 times [2024-06-14 14:04:47,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:47,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136274102] [2024-06-14 14:04:47,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:47,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:47,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:47,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:47,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:47,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136274102] [2024-06-14 14:04:47,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136274102] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:47,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:47,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:04:47,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66913505] [2024-06-14 14:04:47,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:47,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:04:47,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:47,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:04:47,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:04:47,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:04:47,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 453 transitions, 8147 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:47,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:47,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:04:47,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:48,948 INFO L124 PetriNetUnfolderBase]: 3026/5175 cut-off events. [2024-06-14 14:04:48,948 INFO L125 PetriNetUnfolderBase]: For 755339/755343 co-relation queries the response was YES. [2024-06-14 14:04:49,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40453 conditions, 5175 events. 3026/5175 cut-off events. For 755339/755343 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 34824 event pairs, 656 based on Foata normal form. 6/5178 useless extension candidates. Maximal degree in co-relation 40277. Up to 4454 conditions per place. [2024-06-14 14:04:49,020 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 390 selfloop transitions, 81 changer transitions 0/478 dead transitions. [2024-06-14 14:04:49,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 478 transitions, 9541 flow [2024-06-14 14:04:49,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:04:49,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:04:49,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-14 14:04:49,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5544217687074829 [2024-06-14 14:04:49,021 INFO L175 Difference]: Start difference. First operand has 395 places, 453 transitions, 8147 flow. Second operand 7 states and 163 transitions. [2024-06-14 14:04:49,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 478 transitions, 9541 flow [2024-06-14 14:04:52,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 478 transitions, 8910 flow, removed 1 selfloop flow, removed 11 redundant places. [2024-06-14 14:04:52,773 INFO L231 Difference]: Finished difference. Result has 392 places, 463 transitions, 7932 flow [2024-06-14 14:04:52,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7543, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=453, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7932, PETRI_PLACES=392, PETRI_TRANSITIONS=463} [2024-06-14 14:04:52,773 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 349 predicate places. [2024-06-14 14:04:52,773 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 463 transitions, 7932 flow [2024-06-14 14:04:52,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:52,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:52,774 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:04:52,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-14 14:04:52,774 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:04:52,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:52,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1193026822, now seen corresponding path program 18 times [2024-06-14 14:04:52,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:52,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882096316] [2024-06-14 14:04:52,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:52,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:52,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:52,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:52,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:52,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882096316] [2024-06-14 14:04:52,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882096316] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:52,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:52,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:04:52,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597092686] [2024-06-14 14:04:52,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:52,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:04:52,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:52,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:04:52,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:04:53,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:04:53,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 463 transitions, 7932 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:53,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:53,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:04:53,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:54,082 INFO L124 PetriNetUnfolderBase]: 3020/5158 cut-off events. [2024-06-14 14:04:54,082 INFO L125 PetriNetUnfolderBase]: For 748191/748191 co-relation queries the response was YES. [2024-06-14 14:04:54,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39811 conditions, 5158 events. 3020/5158 cut-off events. For 748191/748191 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 34648 event pairs, 683 based on Foata normal form. 2/5151 useless extension candidates. Maximal degree in co-relation 39633. Up to 4338 conditions per place. [2024-06-14 14:04:54,168 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 342 selfloop transitions, 134 changer transitions 0/483 dead transitions. [2024-06-14 14:04:54,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 483 transitions, 9620 flow [2024-06-14 14:04:54,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:04:54,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:04:54,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 227 transitions. [2024-06-14 14:04:54,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5404761904761904 [2024-06-14 14:04:54,169 INFO L175 Difference]: Start difference. First operand has 392 places, 463 transitions, 7932 flow. Second operand 10 states and 227 transitions. [2024-06-14 14:04:54,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 483 transitions, 9620 flow [2024-06-14 14:04:57,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 483 transitions, 9454 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-14 14:04:57,488 INFO L231 Difference]: Finished difference. Result has 398 places, 463 transitions, 8041 flow [2024-06-14 14:04:57,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7766, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8041, PETRI_PLACES=398, PETRI_TRANSITIONS=463} [2024-06-14 14:04:57,489 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 355 predicate places. [2024-06-14 14:04:57,489 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 463 transitions, 8041 flow [2024-06-14 14:04:57,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:57,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:57,489 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:04:57,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-14 14:04:57,489 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:04:57,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:57,490 INFO L85 PathProgramCache]: Analyzing trace with hash -1770133414, now seen corresponding path program 19 times [2024-06-14 14:04:57,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:57,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092908939] [2024-06-14 14:04:57,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:57,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:57,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:57,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:57,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:57,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092908939] [2024-06-14 14:04:57,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092908939] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:57,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:57,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:04:57,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382850703] [2024-06-14 14:04:57,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:57,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:04:57,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:57,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:04:57,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:04:57,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:04:57,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 463 transitions, 8041 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:57,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:57,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:04:57,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:58,693 INFO L124 PetriNetUnfolderBase]: 3014/5150 cut-off events. [2024-06-14 14:04:58,693 INFO L125 PetriNetUnfolderBase]: For 747422/747422 co-relation queries the response was YES. [2024-06-14 14:04:58,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39752 conditions, 5150 events. 3014/5150 cut-off events. For 747422/747422 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 34652 event pairs, 681 based on Foata normal form. 2/5143 useless extension candidates. Maximal degree in co-relation 39573. Up to 4039 conditions per place. [2024-06-14 14:04:58,770 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 248 selfloop transitions, 227 changer transitions 0/482 dead transitions. [2024-06-14 14:04:58,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 482 transitions, 9499 flow [2024-06-14 14:04:58,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:04:58,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:04:58,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 228 transitions. [2024-06-14 14:04:58,771 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5428571428571428 [2024-06-14 14:04:58,771 INFO L175 Difference]: Start difference. First operand has 398 places, 463 transitions, 8041 flow. Second operand 10 states and 228 transitions. [2024-06-14 14:04:58,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 482 transitions, 9499 flow [2024-06-14 14:05:01,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 482 transitions, 8945 flow, removed 67 selfloop flow, removed 9 redundant places. [2024-06-14 14:05:01,845 INFO L231 Difference]: Finished difference. Result has 399 places, 463 transitions, 7948 flow [2024-06-14 14:05:01,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7487, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=227, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7948, PETRI_PLACES=399, PETRI_TRANSITIONS=463} [2024-06-14 14:05:01,845 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 356 predicate places. [2024-06-14 14:05:01,845 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 463 transitions, 7948 flow [2024-06-14 14:05:01,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:01,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:01,846 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:01,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-14 14:05:01,846 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:01,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:01,847 INFO L85 PathProgramCache]: Analyzing trace with hash 284000846, now seen corresponding path program 20 times [2024-06-14 14:05:01,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:01,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810077352] [2024-06-14 14:05:01,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:01,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:01,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:02,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:02,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:02,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810077352] [2024-06-14 14:05:02,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810077352] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:02,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:02,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:05:02,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654901989] [2024-06-14 14:05:02,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:02,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:05:02,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:02,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:05:02,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:05:02,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:05:02,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 463 transitions, 7948 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:02,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:02,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:05:02,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:03,081 INFO L124 PetriNetUnfolderBase]: 3008/5126 cut-off events. [2024-06-14 14:05:03,081 INFO L125 PetriNetUnfolderBase]: For 747914/747914 co-relation queries the response was YES. [2024-06-14 14:05:03,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39137 conditions, 5126 events. 3008/5126 cut-off events. For 747914/747914 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 34405 event pairs, 669 based on Foata normal form. 2/5119 useless extension candidates. Maximal degree in co-relation 38961. Up to 4034 conditions per place. [2024-06-14 14:05:03,168 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 247 selfloop transitions, 227 changer transitions 0/481 dead transitions. [2024-06-14 14:05:03,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 481 transitions, 9172 flow [2024-06-14 14:05:03,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:05:03,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:05:03,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 225 transitions. [2024-06-14 14:05:03,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2024-06-14 14:05:03,169 INFO L175 Difference]: Start difference. First operand has 399 places, 463 transitions, 7948 flow. Second operand 10 states and 225 transitions. [2024-06-14 14:05:03,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 481 transitions, 9172 flow [2024-06-14 14:05:06,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 481 transitions, 8800 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-14 14:05:06,501 INFO L231 Difference]: Finished difference. Result has 402 places, 463 transitions, 8037 flow [2024-06-14 14:05:06,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7576, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=227, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8037, PETRI_PLACES=402, PETRI_TRANSITIONS=463} [2024-06-14 14:05:06,501 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 359 predicate places. [2024-06-14 14:05:06,501 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 463 transitions, 8037 flow [2024-06-14 14:05:06,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:06,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:06,502 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:06,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-14 14:05:06,502 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:06,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:06,502 INFO L85 PathProgramCache]: Analyzing trace with hash 119714200, now seen corresponding path program 21 times [2024-06-14 14:05:06,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:06,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106141026] [2024-06-14 14:05:06,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:06,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:06,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:06,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:06,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:06,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106141026] [2024-06-14 14:05:06,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106141026] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:06,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:06,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:05:06,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655512853] [2024-06-14 14:05:06,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:06,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:05:06,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:06,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:05:06,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:05:06,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:05:06,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 463 transitions, 8037 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:06,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:06,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:05:06,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:07,708 INFO L124 PetriNetUnfolderBase]: 3018/5185 cut-off events. [2024-06-14 14:05:07,708 INFO L125 PetriNetUnfolderBase]: For 758466/758466 co-relation queries the response was YES. [2024-06-14 14:05:07,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39460 conditions, 5185 events. 3018/5185 cut-off events. For 758466/758466 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 34971 event pairs, 630 based on Foata normal form. 2/5185 useless extension candidates. Maximal degree in co-relation 39283. Up to 4302 conditions per place. [2024-06-14 14:05:07,785 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 346 selfloop transitions, 147 changer transitions 0/500 dead transitions. [2024-06-14 14:05:07,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 500 transitions, 9905 flow [2024-06-14 14:05:07,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:05:07,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:05:07,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-14 14:05:07,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6160714285714286 [2024-06-14 14:05:07,787 INFO L175 Difference]: Start difference. First operand has 402 places, 463 transitions, 8037 flow. Second operand 8 states and 207 transitions. [2024-06-14 14:05:07,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 500 transitions, 9905 flow [2024-06-14 14:05:11,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 500 transitions, 9427 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-14 14:05:11,887 INFO L231 Difference]: Finished difference. Result has 400 places, 467 transitions, 7969 flow [2024-06-14 14:05:11,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7565, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7969, PETRI_PLACES=400, PETRI_TRANSITIONS=467} [2024-06-14 14:05:11,887 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 357 predicate places. [2024-06-14 14:05:11,887 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 467 transitions, 7969 flow [2024-06-14 14:05:11,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:11,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:11,888 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:11,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-14 14:05:11,888 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:11,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:11,889 INFO L85 PathProgramCache]: Analyzing trace with hash 132373546, now seen corresponding path program 22 times [2024-06-14 14:05:11,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:11,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920601415] [2024-06-14 14:05:11,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:11,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:11,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:12,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:12,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:12,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920601415] [2024-06-14 14:05:12,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920601415] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:12,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:12,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:05:12,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213491628] [2024-06-14 14:05:12,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:12,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:05:12,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:12,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:05:12,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:05:12,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:05:12,190 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 467 transitions, 7969 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:12,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:12,190 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:05:12,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:13,111 INFO L124 PetriNetUnfolderBase]: 3012/5160 cut-off events. [2024-06-14 14:05:13,111 INFO L125 PetriNetUnfolderBase]: For 755982/755982 co-relation queries the response was YES. [2024-06-14 14:05:13,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39097 conditions, 5160 events. 3012/5160 cut-off events. For 755982/755982 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 34726 event pairs, 642 based on Foata normal form. 2/5159 useless extension candidates. Maximal degree in co-relation 38919. Up to 4297 conditions per place. [2024-06-14 14:05:13,185 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 357 selfloop transitions, 127 changer transitions 0/491 dead transitions. [2024-06-14 14:05:13,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 491 transitions, 9235 flow [2024-06-14 14:05:13,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:05:13,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:05:13,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-14 14:05:13,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6054421768707483 [2024-06-14 14:05:13,186 INFO L175 Difference]: Start difference. First operand has 400 places, 467 transitions, 7969 flow. Second operand 7 states and 178 transitions. [2024-06-14 14:05:13,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 491 transitions, 9235 flow [2024-06-14 14:05:17,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 491 transitions, 8892 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-14 14:05:17,332 INFO L231 Difference]: Finished difference. Result has 400 places, 467 transitions, 7895 flow [2024-06-14 14:05:17,332 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7630, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7895, PETRI_PLACES=400, PETRI_TRANSITIONS=467} [2024-06-14 14:05:17,332 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 357 predicate places. [2024-06-14 14:05:17,332 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 467 transitions, 7895 flow [2024-06-14 14:05:17,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:17,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:17,333 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:17,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-14 14:05:17,333 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:17,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:17,334 INFO L85 PathProgramCache]: Analyzing trace with hash 100625068, now seen corresponding path program 23 times [2024-06-14 14:05:17,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:17,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647393484] [2024-06-14 14:05:17,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:17,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:17,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:17,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:17,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:17,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647393484] [2024-06-14 14:05:17,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647393484] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:17,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:17,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:05:17,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974878332] [2024-06-14 14:05:17,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:17,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:05:17,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:17,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:05:17,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:05:17,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:05:17,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 467 transitions, 7895 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:17,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:17,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:05:17,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:18,559 INFO L124 PetriNetUnfolderBase]: 3006/5152 cut-off events. [2024-06-14 14:05:18,559 INFO L125 PetriNetUnfolderBase]: For 729087/729087 co-relation queries the response was YES. [2024-06-14 14:05:18,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38632 conditions, 5152 events. 3006/5152 cut-off events. For 729087/729087 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 34697 event pairs, 642 based on Foata normal form. 2/5151 useless extension candidates. Maximal degree in co-relation 38455. Up to 4292 conditions per place. [2024-06-14 14:05:18,633 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 360 selfloop transitions, 128 changer transitions 0/495 dead transitions. [2024-06-14 14:05:18,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 495 transitions, 9177 flow [2024-06-14 14:05:18,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:05:18,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:05:18,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-14 14:05:18,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5982142857142857 [2024-06-14 14:05:18,634 INFO L175 Difference]: Start difference. First operand has 400 places, 467 transitions, 7895 flow. Second operand 8 states and 201 transitions. [2024-06-14 14:05:18,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 495 transitions, 9177 flow [2024-06-14 14:05:22,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 495 transitions, 8844 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-14 14:05:22,665 INFO L231 Difference]: Finished difference. Result has 401 places, 467 transitions, 7831 flow [2024-06-14 14:05:22,665 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7564, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7831, PETRI_PLACES=401, PETRI_TRANSITIONS=467} [2024-06-14 14:05:22,666 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 358 predicate places. [2024-06-14 14:05:22,666 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 467 transitions, 7831 flow [2024-06-14 14:05:22,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:22,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:22,666 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:22,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-14 14:05:22,666 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:22,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:22,666 INFO L85 PathProgramCache]: Analyzing trace with hash -1476785092, now seen corresponding path program 5 times [2024-06-14 14:05:22,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:22,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636749395] [2024-06-14 14:05:22,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:22,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:22,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:22,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:22,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:22,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636749395] [2024-06-14 14:05:22,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636749395] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:22,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:22,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:05:22,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275384598] [2024-06-14 14:05:22,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:22,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:05:22,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:22,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:05:22,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:05:22,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:05:22,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 467 transitions, 7831 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:22,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:22,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:05:22,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:23,944 INFO L124 PetriNetUnfolderBase]: 3001/5152 cut-off events. [2024-06-14 14:05:23,944 INFO L125 PetriNetUnfolderBase]: For 713706/713706 co-relation queries the response was YES. [2024-06-14 14:05:24,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38308 conditions, 5152 events. 3001/5152 cut-off events. For 713706/713706 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 34753 event pairs, 651 based on Foata normal form. 2/5149 useless extension candidates. Maximal degree in co-relation 38131. Up to 4392 conditions per place. [2024-06-14 14:05:24,023 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 365 selfloop transitions, 117 changer transitions 0/489 dead transitions. [2024-06-14 14:05:24,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 489 transitions, 8847 flow [2024-06-14 14:05:24,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:05:24,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:05:24,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 236 transitions. [2024-06-14 14:05:24,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5108225108225108 [2024-06-14 14:05:24,025 INFO L175 Difference]: Start difference. First operand has 401 places, 467 transitions, 7831 flow. Second operand 11 states and 236 transitions. [2024-06-14 14:05:24,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 489 transitions, 8847 flow [2024-06-14 14:05:27,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 489 transitions, 8427 flow, removed 27 selfloop flow, removed 9 redundant places. [2024-06-14 14:05:27,786 INFO L231 Difference]: Finished difference. Result has 403 places, 467 transitions, 7650 flow [2024-06-14 14:05:27,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7411, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7650, PETRI_PLACES=403, PETRI_TRANSITIONS=467} [2024-06-14 14:05:27,787 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 360 predicate places. [2024-06-14 14:05:27,787 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 467 transitions, 7650 flow [2024-06-14 14:05:27,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:27,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:27,787 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:27,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-14 14:05:27,787 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:27,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:27,787 INFO L85 PathProgramCache]: Analyzing trace with hash 209888090, now seen corresponding path program 6 times [2024-06-14 14:05:27,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:27,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339613193] [2024-06-14 14:05:27,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:27,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:27,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:28,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:28,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:28,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339613193] [2024-06-14 14:05:28,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339613193] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:28,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:28,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:05:28,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105947123] [2024-06-14 14:05:28,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:28,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:05:28,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:28,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:05:28,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:05:28,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:05:28,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 467 transitions, 7650 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:28,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:28,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:05:28,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:29,021 INFO L124 PetriNetUnfolderBase]: 3068/5250 cut-off events. [2024-06-14 14:05:29,021 INFO L125 PetriNetUnfolderBase]: For 784724/784728 co-relation queries the response was YES. [2024-06-14 14:05:29,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39804 conditions, 5250 events. 3068/5250 cut-off events. For 784724/784728 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 35415 event pairs, 646 based on Foata normal form. 6/5253 useless extension candidates. Maximal degree in co-relation 39629. Up to 4582 conditions per place. [2024-06-14 14:05:29,095 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 447 selfloop transitions, 45 changer transitions 0/499 dead transitions. [2024-06-14 14:05:29,095 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 499 transitions, 9048 flow [2024-06-14 14:05:29,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:05:29,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:05:29,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 205 transitions. [2024-06-14 14:05:29,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5423280423280423 [2024-06-14 14:05:29,096 INFO L175 Difference]: Start difference. First operand has 403 places, 467 transitions, 7650 flow. Second operand 9 states and 205 transitions. [2024-06-14 14:05:29,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 499 transitions, 9048 flow [2024-06-14 14:05:33,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 499 transitions, 8811 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-14 14:05:33,079 INFO L231 Difference]: Finished difference. Result has 404 places, 471 transitions, 7618 flow [2024-06-14 14:05:33,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7413, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=422, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7618, PETRI_PLACES=404, PETRI_TRANSITIONS=471} [2024-06-14 14:05:33,079 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 361 predicate places. [2024-06-14 14:05:33,080 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 471 transitions, 7618 flow [2024-06-14 14:05:33,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:33,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:33,080 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:33,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-14 14:05:33,080 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:33,080 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:33,080 INFO L85 PathProgramCache]: Analyzing trace with hash -409968630, now seen corresponding path program 7 times [2024-06-14 14:05:33,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:33,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557357566] [2024-06-14 14:05:33,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:33,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:33,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:33,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:33,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:33,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557357566] [2024-06-14 14:05:33,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557357566] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:33,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:33,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:05:33,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521160332] [2024-06-14 14:05:33,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:33,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:05:33,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:33,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:05:33,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:05:33,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:05:33,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 471 transitions, 7618 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:33,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:33,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:05:33,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:34,329 INFO L124 PetriNetUnfolderBase]: 3076/5272 cut-off events. [2024-06-14 14:05:34,329 INFO L125 PetriNetUnfolderBase]: For 797502/797506 co-relation queries the response was YES. [2024-06-14 14:05:34,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39991 conditions, 5272 events. 3076/5272 cut-off events. For 797502/797506 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 35627 event pairs, 656 based on Foata normal form. 6/5276 useless extension candidates. Maximal degree in co-relation 39814. Up to 4505 conditions per place. [2024-06-14 14:05:34,406 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 373 selfloop transitions, 114 changer transitions 0/494 dead transitions. [2024-06-14 14:05:34,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 494 transitions, 8697 flow [2024-06-14 14:05:34,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:05:34,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:05:34,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 218 transitions. [2024-06-14 14:05:34,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5190476190476191 [2024-06-14 14:05:34,407 INFO L175 Difference]: Start difference. First operand has 404 places, 471 transitions, 7618 flow. Second operand 10 states and 218 transitions. [2024-06-14 14:05:34,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 494 transitions, 8697 flow [2024-06-14 14:05:37,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 494 transitions, 8570 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-14 14:05:37,950 INFO L231 Difference]: Finished difference. Result has 408 places, 473 transitions, 7783 flow [2024-06-14 14:05:37,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7499, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=471, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7783, PETRI_PLACES=408, PETRI_TRANSITIONS=473} [2024-06-14 14:05:37,950 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 365 predicate places. [2024-06-14 14:05:37,950 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 473 transitions, 7783 flow [2024-06-14 14:05:37,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:37,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:37,951 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:37,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-14 14:05:37,951 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:37,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:37,951 INFO L85 PathProgramCache]: Analyzing trace with hash -2116787060, now seen corresponding path program 8 times [2024-06-14 14:05:37,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:37,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222845930] [2024-06-14 14:05:37,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:37,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:37,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:38,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:38,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:38,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222845930] [2024-06-14 14:05:38,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222845930] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:38,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:38,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:05:38,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709976482] [2024-06-14 14:05:38,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:38,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:05:38,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:38,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:05:38,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:05:38,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:05:38,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 473 transitions, 7783 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:38,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:38,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:05:38,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:39,263 INFO L124 PetriNetUnfolderBase]: 3202/5502 cut-off events. [2024-06-14 14:05:39,264 INFO L125 PetriNetUnfolderBase]: For 954838/954842 co-relation queries the response was YES. [2024-06-14 14:05:39,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44114 conditions, 5502 events. 3202/5502 cut-off events. For 954838/954842 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 37530 event pairs, 553 based on Foata normal form. 6/5506 useless extension candidates. Maximal degree in co-relation 43936. Up to 3350 conditions per place. [2024-06-14 14:05:39,345 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 357 selfloop transitions, 148 changer transitions 0/512 dead transitions. [2024-06-14 14:05:39,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 512 transitions, 9542 flow [2024-06-14 14:05:39,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:05:39,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:05:39,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 213 transitions. [2024-06-14 14:05:39,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5634920634920635 [2024-06-14 14:05:39,346 INFO L175 Difference]: Start difference. First operand has 408 places, 473 transitions, 7783 flow. Second operand 9 states and 213 transitions. [2024-06-14 14:05:39,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 512 transitions, 9542 flow [2024-06-14 14:05:43,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 512 transitions, 9283 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-14 14:05:43,976 INFO L231 Difference]: Finished difference. Result has 410 places, 479 transitions, 8010 flow [2024-06-14 14:05:43,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7524, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8010, PETRI_PLACES=410, PETRI_TRANSITIONS=479} [2024-06-14 14:05:43,977 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 367 predicate places. [2024-06-14 14:05:43,977 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 479 transitions, 8010 flow [2024-06-14 14:05:43,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:43,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:43,977 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:43,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-14 14:05:43,977 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:43,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:43,978 INFO L85 PathProgramCache]: Analyzing trace with hash 1548480616, now seen corresponding path program 9 times [2024-06-14 14:05:43,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:43,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923819630] [2024-06-14 14:05:43,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:43,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:43,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:44,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:44,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:44,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923819630] [2024-06-14 14:05:44,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923819630] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:44,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:44,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:05:44,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69996324] [2024-06-14 14:05:44,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:44,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:05:44,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:44,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:05:44,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:05:44,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:05:44,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 479 transitions, 8010 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:44,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:44,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:05:44,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:45,358 INFO L124 PetriNetUnfolderBase]: 3177/5455 cut-off events. [2024-06-14 14:05:45,358 INFO L125 PetriNetUnfolderBase]: For 960280/960284 co-relation queries the response was YES. [2024-06-14 14:05:45,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43726 conditions, 5455 events. 3177/5455 cut-off events. For 960280/960284 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 37173 event pairs, 618 based on Foata normal form. 12/5465 useless extension candidates. Maximal degree in co-relation 43546. Up to 3336 conditions per place. [2024-06-14 14:05:45,441 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 366 selfloop transitions, 136 changer transitions 0/509 dead transitions. [2024-06-14 14:05:45,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 509 transitions, 9362 flow [2024-06-14 14:05:45,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:05:45,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:05:45,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 210 transitions. [2024-06-14 14:05:45,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2024-06-14 14:05:45,442 INFO L175 Difference]: Start difference. First operand has 410 places, 479 transitions, 8010 flow. Second operand 9 states and 210 transitions. [2024-06-14 14:05:45,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 509 transitions, 9362 flow [2024-06-14 14:05:49,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 509 transitions, 9106 flow, removed 44 selfloop flow, removed 5 redundant places. [2024-06-14 14:05:49,917 INFO L231 Difference]: Finished difference. Result has 414 places, 479 transitions, 8032 flow [2024-06-14 14:05:49,918 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7754, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8032, PETRI_PLACES=414, PETRI_TRANSITIONS=479} [2024-06-14 14:05:49,918 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 371 predicate places. [2024-06-14 14:05:49,918 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 479 transitions, 8032 flow [2024-06-14 14:05:49,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:49,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:49,918 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:49,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-14 14:05:49,919 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:49,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:49,919 INFO L85 PathProgramCache]: Analyzing trace with hash -2028132020, now seen corresponding path program 10 times [2024-06-14 14:05:49,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:49,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919629037] [2024-06-14 14:05:49,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:49,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:49,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:50,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:50,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:50,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919629037] [2024-06-14 14:05:50,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919629037] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:50,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:50,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:05:50,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450368470] [2024-06-14 14:05:50,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:50,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:05:50,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:50,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:05:50,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:05:50,197 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:05:50,197 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 479 transitions, 8032 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:50,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:50,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:05:50,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:51,221 INFO L124 PetriNetUnfolderBase]: 3154/5428 cut-off events. [2024-06-14 14:05:51,221 INFO L125 PetriNetUnfolderBase]: For 915853/915857 co-relation queries the response was YES. [2024-06-14 14:05:51,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42145 conditions, 5428 events. 3154/5428 cut-off events. For 915853/915857 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 37120 event pairs, 690 based on Foata normal form. 14/5440 useless extension candidates. Maximal degree in co-relation 41965. Up to 4591 conditions per place. [2024-06-14 14:05:51,310 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 388 selfloop transitions, 104 changer transitions 0/499 dead transitions. [2024-06-14 14:05:51,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 499 transitions, 9080 flow [2024-06-14 14:05:51,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:05:51,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:05:51,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 202 transitions. [2024-06-14 14:05:51,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5343915343915344 [2024-06-14 14:05:51,311 INFO L175 Difference]: Start difference. First operand has 414 places, 479 transitions, 8032 flow. Second operand 9 states and 202 transitions. [2024-06-14 14:05:51,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 499 transitions, 9080 flow [2024-06-14 14:05:55,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 499 transitions, 8834 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-14 14:05:55,518 INFO L231 Difference]: Finished difference. Result has 416 places, 479 transitions, 8000 flow [2024-06-14 14:05:55,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7786, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8000, PETRI_PLACES=416, PETRI_TRANSITIONS=479} [2024-06-14 14:05:55,518 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 373 predicate places. [2024-06-14 14:05:55,518 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 479 transitions, 8000 flow [2024-06-14 14:05:55,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:55,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:55,518 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:55,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-14 14:05:55,519 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:05:55,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:55,519 INFO L85 PathProgramCache]: Analyzing trace with hash -948120, now seen corresponding path program 11 times [2024-06-14 14:05:55,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:55,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723108276] [2024-06-14 14:05:55,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:55,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:55,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:55,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:55,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:55,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723108276] [2024-06-14 14:05:55,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723108276] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:55,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:55,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:05:55,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473700669] [2024-06-14 14:05:55,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:55,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:05:55,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:55,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:05:55,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:05:55,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:05:55,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 479 transitions, 8000 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:55,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:55,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:05:55,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:56,784 INFO L124 PetriNetUnfolderBase]: 3124/5380 cut-off events. [2024-06-14 14:05:56,784 INFO L125 PetriNetUnfolderBase]: For 852541/852545 co-relation queries the response was YES. [2024-06-14 14:05:56,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40273 conditions, 5380 events. 3124/5380 cut-off events. For 852541/852545 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 36755 event pairs, 660 based on Foata normal form. 14/5392 useless extension candidates. Maximal degree in co-relation 40092. Up to 4339 conditions per place. [2024-06-14 14:05:56,866 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 387 selfloop transitions, 109 changer transitions 0/503 dead transitions. [2024-06-14 14:05:56,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 503 transitions, 9082 flow [2024-06-14 14:05:56,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:05:56,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:05:56,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 205 transitions. [2024-06-14 14:05:56,867 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5423280423280423 [2024-06-14 14:05:56,868 INFO L175 Difference]: Start difference. First operand has 416 places, 479 transitions, 8000 flow. Second operand 9 states and 205 transitions. [2024-06-14 14:05:56,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 503 transitions, 9082 flow [2024-06-14 14:06:00,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 503 transitions, 8896 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-14 14:06:00,561 INFO L231 Difference]: Finished difference. Result has 419 places, 479 transitions, 8039 flow [2024-06-14 14:06:00,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7814, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=370, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8039, PETRI_PLACES=419, PETRI_TRANSITIONS=479} [2024-06-14 14:06:00,561 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 376 predicate places. [2024-06-14 14:06:00,561 INFO L495 AbstractCegarLoop]: Abstraction has has 419 places, 479 transitions, 8039 flow [2024-06-14 14:06:00,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:00,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:00,562 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:00,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-14 14:06:00,562 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:00,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:00,562 INFO L85 PathProgramCache]: Analyzing trace with hash -936518376, now seen corresponding path program 12 times [2024-06-14 14:06:00,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:00,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902762907] [2024-06-14 14:06:00,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:00,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:00,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:00,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:00,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:00,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902762907] [2024-06-14 14:06:00,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902762907] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:00,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:00,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:06:00,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555281785] [2024-06-14 14:06:00,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:00,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:06:00,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:00,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:06:00,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:06:00,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:06:00,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 419 places, 479 transitions, 8039 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:00,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:00,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:06:00,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:01,889 INFO L124 PetriNetUnfolderBase]: 3160/5425 cut-off events. [2024-06-14 14:06:01,889 INFO L125 PetriNetUnfolderBase]: For 869525/869525 co-relation queries the response was YES. [2024-06-14 14:06:01,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40777 conditions, 5425 events. 3160/5425 cut-off events. For 869525/869525 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 37045 event pairs, 686 based on Foata normal form. 10/5430 useless extension candidates. Maximal degree in co-relation 40595. Up to 4732 conditions per place. [2024-06-14 14:06:01,972 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 434 selfloop transitions, 59 changer transitions 0/500 dead transitions. [2024-06-14 14:06:01,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 426 places, 500 transitions, 9142 flow [2024-06-14 14:06:01,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:06:01,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:06:01,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 181 transitions. [2024-06-14 14:06:01,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5386904761904762 [2024-06-14 14:06:01,973 INFO L175 Difference]: Start difference. First operand has 419 places, 479 transitions, 8039 flow. Second operand 8 states and 181 transitions. [2024-06-14 14:06:01,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 426 places, 500 transitions, 9142 flow [2024-06-14 14:06:06,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 500 transitions, 8863 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-06-14 14:06:06,153 INFO L231 Difference]: Finished difference. Result has 418 places, 481 transitions, 7943 flow [2024-06-14 14:06:06,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7760, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7943, PETRI_PLACES=418, PETRI_TRANSITIONS=481} [2024-06-14 14:06:06,154 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 375 predicate places. [2024-06-14 14:06:06,154 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 481 transitions, 7943 flow [2024-06-14 14:06:06,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:06,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:06,155 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:06,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-14 14:06:06,155 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:06,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:06,155 INFO L85 PathProgramCache]: Analyzing trace with hash -1661859752, now seen corresponding path program 13 times [2024-06-14 14:06:06,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:06,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535927579] [2024-06-14 14:06:06,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:06,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:06,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:06,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:06,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:06,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535927579] [2024-06-14 14:06:06,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535927579] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:06,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:06,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:06:06,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163534322] [2024-06-14 14:06:06,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:06,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:06:06,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:06,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:06:06,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:06:06,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:06:06,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 481 transitions, 7943 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:06,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:06,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:06:06,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:07,512 INFO L124 PetriNetUnfolderBase]: 3137/5392 cut-off events. [2024-06-14 14:06:07,512 INFO L125 PetriNetUnfolderBase]: For 801891/801891 co-relation queries the response was YES. [2024-06-14 14:06:07,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39175 conditions, 5392 events. 3137/5392 cut-off events. For 801891/801891 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 36862 event pairs, 677 based on Foata normal form. 10/5397 useless extension candidates. Maximal degree in co-relation 38992. Up to 4568 conditions per place. [2024-06-14 14:06:07,597 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 382 selfloop transitions, 115 changer transitions 0/504 dead transitions. [2024-06-14 14:06:07,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 504 transitions, 9007 flow [2024-06-14 14:06:07,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 14:06:07,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 14:06:07,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 260 transitions. [2024-06-14 14:06:07,598 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5158730158730159 [2024-06-14 14:06:07,598 INFO L175 Difference]: Start difference. First operand has 418 places, 481 transitions, 7943 flow. Second operand 12 states and 260 transitions. [2024-06-14 14:06:07,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 504 transitions, 9007 flow [2024-06-14 14:06:11,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 504 transitions, 8863 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-14 14:06:11,846 INFO L231 Difference]: Finished difference. Result has 424 places, 481 transitions, 8035 flow [2024-06-14 14:06:11,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7799, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=481, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8035, PETRI_PLACES=424, PETRI_TRANSITIONS=481} [2024-06-14 14:06:11,847 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 381 predicate places. [2024-06-14 14:06:11,847 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 481 transitions, 8035 flow [2024-06-14 14:06:11,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:11,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:11,847 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:11,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-14 14:06:11,847 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:11,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:11,848 INFO L85 PathProgramCache]: Analyzing trace with hash 550239882, now seen corresponding path program 14 times [2024-06-14 14:06:11,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:11,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781291447] [2024-06-14 14:06:11,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:11,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:11,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:12,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:12,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:12,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781291447] [2024-06-14 14:06:12,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781291447] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:12,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:12,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:06:12,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234148266] [2024-06-14 14:06:12,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:12,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:06:12,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:12,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:06:12,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:06:12,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:06:12,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 481 transitions, 8035 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:12,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:12,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:06:12,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:13,314 INFO L124 PetriNetUnfolderBase]: 3107/5344 cut-off events. [2024-06-14 14:06:13,314 INFO L125 PetriNetUnfolderBase]: For 733694/733694 co-relation queries the response was YES. [2024-06-14 14:06:13,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37719 conditions, 5344 events. 3107/5344 cut-off events. For 733694/733694 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 36491 event pairs, 647 based on Foata normal form. 10/5349 useless extension candidates. Maximal degree in co-relation 37535. Up to 4194 conditions per place. [2024-06-14 14:06:13,389 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 381 selfloop transitions, 118 changer transitions 0/506 dead transitions. [2024-06-14 14:06:13,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 506 transitions, 9125 flow [2024-06-14 14:06:13,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:06:13,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:06:13,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 225 transitions. [2024-06-14 14:06:13,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2024-06-14 14:06:13,390 INFO L175 Difference]: Start difference. First operand has 424 places, 481 transitions, 8035 flow. Second operand 10 states and 225 transitions. [2024-06-14 14:06:13,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 506 transitions, 9125 flow [2024-06-14 14:06:17,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 506 transitions, 8889 flow, removed 26 selfloop flow, removed 10 redundant places. [2024-06-14 14:06:17,707 INFO L231 Difference]: Finished difference. Result has 424 places, 481 transitions, 8043 flow [2024-06-14 14:06:17,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7799, PETRI_DIFFERENCE_MINUEND_PLACES=414, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=481, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8043, PETRI_PLACES=424, PETRI_TRANSITIONS=481} [2024-06-14 14:06:17,708 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 381 predicate places. [2024-06-14 14:06:17,708 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 481 transitions, 8043 flow [2024-06-14 14:06:17,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:17,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:17,708 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:17,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-14 14:06:17,708 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:17,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:17,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1598344620, now seen corresponding path program 1 times [2024-06-14 14:06:17,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:17,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72631158] [2024-06-14 14:06:17,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:17,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:17,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:17,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:17,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:17,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72631158] [2024-06-14 14:06:17,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72631158] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:17,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:17,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:06:17,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363864600] [2024-06-14 14:06:17,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:17,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:06:17,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:17,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:06:17,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:06:17,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:06:17,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 481 transitions, 8043 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:17,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:17,992 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:06:17,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:18,978 INFO L124 PetriNetUnfolderBase]: 3115/5358 cut-off events. [2024-06-14 14:06:18,978 INFO L125 PetriNetUnfolderBase]: For 685214/685214 co-relation queries the response was YES. [2024-06-14 14:06:19,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37795 conditions, 5358 events. 3115/5358 cut-off events. For 685214/685214 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 36693 event pairs, 663 based on Foata normal form. 2/5355 useless extension candidates. Maximal degree in co-relation 37610. Up to 4566 conditions per place. [2024-06-14 14:06:19,061 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 383 selfloop transitions, 110 changer transitions 0/500 dead transitions. [2024-06-14 14:06:19,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 500 transitions, 9133 flow [2024-06-14 14:06:19,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:06:19,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:06:19,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 199 transitions. [2024-06-14 14:06:19,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5264550264550265 [2024-06-14 14:06:19,064 INFO L175 Difference]: Start difference. First operand has 424 places, 481 transitions, 8043 flow. Second operand 9 states and 199 transitions. [2024-06-14 14:06:19,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 500 transitions, 9133 flow [2024-06-14 14:06:23,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 500 transitions, 8874 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-14 14:06:23,472 INFO L231 Difference]: Finished difference. Result has 424 places, 483 transitions, 8077 flow [2024-06-14 14:06:23,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7784, PETRI_DIFFERENCE_MINUEND_PLACES=415, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=481, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8077, PETRI_PLACES=424, PETRI_TRANSITIONS=483} [2024-06-14 14:06:23,472 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 381 predicate places. [2024-06-14 14:06:23,473 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 483 transitions, 8077 flow [2024-06-14 14:06:23,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:23,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:23,473 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:23,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-14 14:06:23,473 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:23,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:23,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1583107500, now seen corresponding path program 2 times [2024-06-14 14:06:23,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:23,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879841567] [2024-06-14 14:06:23,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:23,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:23,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:23,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:23,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:23,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879841567] [2024-06-14 14:06:23,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879841567] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:23,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:23,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:06:23,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136940120] [2024-06-14 14:06:23,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:23,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:06:23,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:23,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:06:23,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:06:23,765 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:06:23,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 483 transitions, 8077 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:23,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:23,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:06:23,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:24,741 INFO L124 PetriNetUnfolderBase]: 3123/5366 cut-off events. [2024-06-14 14:06:24,742 INFO L125 PetriNetUnfolderBase]: For 695432/695432 co-relation queries the response was YES. [2024-06-14 14:06:24,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37909 conditions, 5366 events. 3123/5366 cut-off events. For 695432/695432 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 36671 event pairs, 657 based on Foata normal form. 2/5363 useless extension candidates. Maximal degree in co-relation 37723. Up to 4558 conditions per place. [2024-06-14 14:06:24,817 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 384 selfloop transitions, 112 changer transitions 0/503 dead transitions. [2024-06-14 14:06:24,817 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 503 transitions, 9179 flow [2024-06-14 14:06:24,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:06:24,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:06:24,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 199 transitions. [2024-06-14 14:06:24,818 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5264550264550265 [2024-06-14 14:06:24,818 INFO L175 Difference]: Start difference. First operand has 424 places, 483 transitions, 8077 flow. Second operand 9 states and 199 transitions. [2024-06-14 14:06:24,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 503 transitions, 9179 flow [2024-06-14 14:06:29,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 503 transitions, 8921 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-14 14:06:29,361 INFO L231 Difference]: Finished difference. Result has 427 places, 485 transitions, 8120 flow [2024-06-14 14:06:29,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7819, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=483, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8120, PETRI_PLACES=427, PETRI_TRANSITIONS=485} [2024-06-14 14:06:29,362 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 384 predicate places. [2024-06-14 14:06:29,362 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 485 transitions, 8120 flow [2024-06-14 14:06:29,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:29,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:29,362 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:29,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-14 14:06:29,362 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:29,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:29,363 INFO L85 PathProgramCache]: Analyzing trace with hash 92963066, now seen corresponding path program 15 times [2024-06-14 14:06:29,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:29,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609686870] [2024-06-14 14:06:29,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:29,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:29,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:29,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:29,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:29,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609686870] [2024-06-14 14:06:29,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609686870] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:29,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:29,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:06:29,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743468313] [2024-06-14 14:06:29,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:29,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:06:29,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:29,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:06:29,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:06:29,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:06:29,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 485 transitions, 8120 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:29,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:29,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:06:29,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:30,723 INFO L124 PetriNetUnfolderBase]: 3159/5435 cut-off events. [2024-06-14 14:06:30,724 INFO L125 PetriNetUnfolderBase]: For 775176/775176 co-relation queries the response was YES. [2024-06-14 14:06:30,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38456 conditions, 5435 events. 3159/5435 cut-off events. For 775176/775176 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 37234 event pairs, 638 based on Foata normal form. 10/5441 useless extension candidates. Maximal degree in co-relation 38269. Up to 4470 conditions per place. [2024-06-14 14:06:30,810 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 414 selfloop transitions, 102 changer transitions 0/523 dead transitions. [2024-06-14 14:06:30,810 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 523 transitions, 9329 flow [2024-06-14 14:06:30,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:06:30,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:06:30,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-14 14:06:30,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6160714285714286 [2024-06-14 14:06:30,811 INFO L175 Difference]: Start difference. First operand has 427 places, 485 transitions, 8120 flow. Second operand 8 states and 207 transitions. [2024-06-14 14:06:30,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 523 transitions, 9329 flow [2024-06-14 14:06:36,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 523 transitions, 9044 flow, removed 32 selfloop flow, removed 7 redundant places. [2024-06-14 14:06:36,026 INFO L231 Difference]: Finished difference. Result has 428 places, 487 transitions, 8126 flow [2024-06-14 14:06:36,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7835, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=383, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8126, PETRI_PLACES=428, PETRI_TRANSITIONS=487} [2024-06-14 14:06:36,026 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 385 predicate places. [2024-06-14 14:06:36,027 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 487 transitions, 8126 flow [2024-06-14 14:06:36,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:36,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:36,027 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:36,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-14 14:06:36,027 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:36,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:36,028 INFO L85 PathProgramCache]: Analyzing trace with hash 357340904, now seen corresponding path program 16 times [2024-06-14 14:06:36,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:36,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367211791] [2024-06-14 14:06:36,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:36,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:36,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:36,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:36,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:36,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367211791] [2024-06-14 14:06:36,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367211791] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:36,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:36,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:06:36,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645216401] [2024-06-14 14:06:36,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:36,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:06:36,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:36,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:06:36,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:06:36,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:06:36,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 487 transitions, 8126 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:36,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:36,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:06:36,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:37,349 INFO L124 PetriNetUnfolderBase]: 3136/5395 cut-off events. [2024-06-14 14:06:37,349 INFO L125 PetriNetUnfolderBase]: For 701352/701352 co-relation queries the response was YES. [2024-06-14 14:06:37,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37015 conditions, 5395 events. 3136/5395 cut-off events. For 701352/701352 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 37013 event pairs, 653 based on Foata normal form. 10/5402 useless extension candidates. Maximal degree in co-relation 36827. Up to 4591 conditions per place. [2024-06-14 14:06:37,430 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 423 selfloop transitions, 84 changer transitions 0/514 dead transitions. [2024-06-14 14:06:37,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 514 transitions, 9224 flow [2024-06-14 14:06:37,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:06:37,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:06:37,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-14 14:06:37,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.608843537414966 [2024-06-14 14:06:37,431 INFO L175 Difference]: Start difference. First operand has 428 places, 487 transitions, 8126 flow. Second operand 7 states and 179 transitions. [2024-06-14 14:06:37,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 514 transitions, 9224 flow [2024-06-14 14:06:41,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 514 transitions, 9017 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-14 14:06:41,933 INFO L231 Difference]: Finished difference. Result has 429 places, 487 transitions, 8096 flow [2024-06-14 14:06:41,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7919, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=403, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8096, PETRI_PLACES=429, PETRI_TRANSITIONS=487} [2024-06-14 14:06:41,934 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 386 predicate places. [2024-06-14 14:06:41,934 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 487 transitions, 8096 flow [2024-06-14 14:06:41,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:41,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:41,935 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:41,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-14 14:06:41,935 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:41,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:41,936 INFO L85 PathProgramCache]: Analyzing trace with hash 366864104, now seen corresponding path program 17 times [2024-06-14 14:06:41,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:41,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154700675] [2024-06-14 14:06:41,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:41,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:41,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:42,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:42,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:42,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154700675] [2024-06-14 14:06:42,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154700675] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:42,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:42,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:06:42,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830562364] [2024-06-14 14:06:42,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:42,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:06:42,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:42,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:06:42,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:06:42,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:06:42,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 487 transitions, 8096 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:42,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:42,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:06:42,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:43,252 INFO L124 PetriNetUnfolderBase]: 3106/5352 cut-off events. [2024-06-14 14:06:43,252 INFO L125 PetriNetUnfolderBase]: For 623642/623642 co-relation queries the response was YES. [2024-06-14 14:06:43,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35281 conditions, 5352 events. 3106/5352 cut-off events. For 623642/623642 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 36659 event pairs, 540 based on Foata normal form. 10/5359 useless extension candidates. Maximal degree in co-relation 35092. Up to 4016 conditions per place. [2024-06-14 14:06:43,505 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 414 selfloop transitions, 99 changer transitions 0/520 dead transitions. [2024-06-14 14:06:43,505 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 520 transitions, 9246 flow [2024-06-14 14:06:43,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:06:43,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:06:43,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-14 14:06:43,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6258503401360545 [2024-06-14 14:06:43,506 INFO L175 Difference]: Start difference. First operand has 429 places, 487 transitions, 8096 flow. Second operand 7 states and 184 transitions. [2024-06-14 14:06:43,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 520 transitions, 9246 flow [2024-06-14 14:06:48,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 520 transitions, 9007 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-14 14:06:48,275 INFO L231 Difference]: Finished difference. Result has 430 places, 487 transitions, 8066 flow [2024-06-14 14:06:48,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7857, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8066, PETRI_PLACES=430, PETRI_TRANSITIONS=487} [2024-06-14 14:06:48,276 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 387 predicate places. [2024-06-14 14:06:48,276 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 487 transitions, 8066 flow [2024-06-14 14:06:48,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:48,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:48,276 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:48,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-14 14:06:48,276 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:48,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:48,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1612494528, now seen corresponding path program 3 times [2024-06-14 14:06:48,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:48,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283734378] [2024-06-14 14:06:48,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:48,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:48,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:48,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:48,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:48,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283734378] [2024-06-14 14:06:48,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283734378] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:48,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:48,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:06:48,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833794216] [2024-06-14 14:06:48,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:48,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:06:48,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:48,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:06:48,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:06:48,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:06:48,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 487 transitions, 8066 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:48,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:48,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:06:48,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:49,548 INFO L124 PetriNetUnfolderBase]: 3114/5373 cut-off events. [2024-06-14 14:06:49,548 INFO L125 PetriNetUnfolderBase]: For 563964/563964 co-relation queries the response was YES. [2024-06-14 14:06:49,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35365 conditions, 5373 events. 3114/5373 cut-off events. For 563964/563964 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 36855 event pairs, 630 based on Foata normal form. 2/5373 useless extension candidates. Maximal degree in co-relation 35176. Up to 4559 conditions per place. [2024-06-14 14:06:49,628 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 420 selfloop transitions, 94 changer transitions 1/522 dead transitions. [2024-06-14 14:06:49,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 522 transitions, 9260 flow [2024-06-14 14:06:49,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:06:49,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:06:49,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-14 14:06:49,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6101190476190477 [2024-06-14 14:06:49,629 INFO L175 Difference]: Start difference. First operand has 430 places, 487 transitions, 8066 flow. Second operand 8 states and 205 transitions. [2024-06-14 14:06:49,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 522 transitions, 9260 flow [2024-06-14 14:06:53,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 522 transitions, 8938 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-14 14:06:53,449 INFO L231 Difference]: Finished difference. Result has 430 places, 489 transitions, 8019 flow [2024-06-14 14:06:53,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7744, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=393, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8019, PETRI_PLACES=430, PETRI_TRANSITIONS=489} [2024-06-14 14:06:53,450 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 387 predicate places. [2024-06-14 14:06:53,450 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 489 transitions, 8019 flow [2024-06-14 14:06:53,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:53,450 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:53,450 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:53,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-14 14:06:53,451 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:53,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:53,451 INFO L85 PathProgramCache]: Analyzing trace with hash 2018614036, now seen corresponding path program 4 times [2024-06-14 14:06:53,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:53,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565717350] [2024-06-14 14:06:53,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:53,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:53,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:53,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:53,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:53,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565717350] [2024-06-14 14:06:53,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565717350] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:53,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:53,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:06:53,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230583237] [2024-06-14 14:06:53,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:53,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:06:53,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:53,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:06:53,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:06:53,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:06:53,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 489 transitions, 8019 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:53,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:53,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:06:53,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:54,865 INFO L124 PetriNetUnfolderBase]: 3168/5449 cut-off events. [2024-06-14 14:06:54,865 INFO L125 PetriNetUnfolderBase]: For 628998/628998 co-relation queries the response was YES. [2024-06-14 14:06:54,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36806 conditions, 5449 events. 3168/5449 cut-off events. For 628998/628998 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 37382 event pairs, 521 based on Foata normal form. 2/5447 useless extension candidates. Maximal degree in co-relation 36616. Up to 3967 conditions per place. [2024-06-14 14:06:54,945 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 411 selfloop transitions, 115 changer transitions 1/534 dead transitions. [2024-06-14 14:06:54,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 534 transitions, 9631 flow [2024-06-14 14:06:54,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:06:54,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:06:54,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 211 transitions. [2024-06-14 14:06:54,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6279761904761905 [2024-06-14 14:06:54,946 INFO L175 Difference]: Start difference. First operand has 430 places, 489 transitions, 8019 flow. Second operand 8 states and 211 transitions. [2024-06-14 14:06:54,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 534 transitions, 9631 flow [2024-06-14 14:06:58,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 534 transitions, 9390 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-14 14:06:58,916 INFO L231 Difference]: Finished difference. Result has 433 places, 493 transitions, 8181 flow [2024-06-14 14:06:58,917 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7778, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8181, PETRI_PLACES=433, PETRI_TRANSITIONS=493} [2024-06-14 14:06:58,917 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 390 predicate places. [2024-06-14 14:06:58,917 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 493 transitions, 8181 flow [2024-06-14 14:06:58,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:58,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:58,917 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:58,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-14 14:06:58,917 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:58,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:58,918 INFO L85 PathProgramCache]: Analyzing trace with hash -2033454000, now seen corresponding path program 5 times [2024-06-14 14:06:58,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:58,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190344076] [2024-06-14 14:06:58,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:58,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:58,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:59,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:59,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:59,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190344076] [2024-06-14 14:06:59,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190344076] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:59,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:59,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:06:59,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546901102] [2024-06-14 14:06:59,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:59,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:06:59,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:59,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:06:59,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:06:59,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:06:59,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 493 transitions, 8181 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:59,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:59,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:06:59,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:00,205 INFO L124 PetriNetUnfolderBase]: 3209/5520 cut-off events. [2024-06-14 14:07:00,205 INFO L125 PetriNetUnfolderBase]: For 701405/701405 co-relation queries the response was YES. [2024-06-14 14:07:00,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38914 conditions, 5520 events. 3209/5520 cut-off events. For 701405/701405 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 38060 event pairs, 668 based on Foata normal form. 2/5519 useless extension candidates. Maximal degree in co-relation 38722. Up to 4622 conditions per place. [2024-06-14 14:07:00,287 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 426 selfloop transitions, 89 changer transitions 0/522 dead transitions. [2024-06-14 14:07:00,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 522 transitions, 9708 flow [2024-06-14 14:07:00,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:07:00,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:07:00,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-14 14:07:00,288 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5986394557823129 [2024-06-14 14:07:00,288 INFO L175 Difference]: Start difference. First operand has 433 places, 493 transitions, 8181 flow. Second operand 7 states and 176 transitions. [2024-06-14 14:07:00,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 522 transitions, 9708 flow [2024-06-14 14:07:06,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 522 transitions, 9514 flow, removed 40 selfloop flow, removed 4 redundant places. [2024-06-14 14:07:06,453 INFO L231 Difference]: Finished difference. Result has 437 places, 497 transitions, 8359 flow [2024-06-14 14:07:06,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7995, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8359, PETRI_PLACES=437, PETRI_TRANSITIONS=497} [2024-06-14 14:07:06,454 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 394 predicate places. [2024-06-14 14:07:06,454 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 497 transitions, 8359 flow [2024-06-14 14:07:06,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:06,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:06,454 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:06,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-14 14:07:06,454 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:07:06,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:06,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1629214984, now seen corresponding path program 6 times [2024-06-14 14:07:06,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:06,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913473833] [2024-06-14 14:07:06,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:06,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:06,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:06,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:06,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:06,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913473833] [2024-06-14 14:07:06,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913473833] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:06,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:06,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:07:06,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125441967] [2024-06-14 14:07:06,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:06,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:07:06,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:06,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:07:06,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:07:06,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:07:06,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 497 transitions, 8359 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:06,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:06,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:07:06,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:07,762 INFO L124 PetriNetUnfolderBase]: 3204/5518 cut-off events. [2024-06-14 14:07:07,763 INFO L125 PetriNetUnfolderBase]: For 685046/685046 co-relation queries the response was YES. [2024-06-14 14:07:07,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38812 conditions, 5518 events. 3204/5518 cut-off events. For 685046/685046 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 38022 event pairs, 680 based on Foata normal form. 2/5517 useless extension candidates. Maximal degree in co-relation 38617. Up to 4745 conditions per place. [2024-06-14 14:07:07,847 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 430 selfloop transitions, 82 changer transitions 0/519 dead transitions. [2024-06-14 14:07:07,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 519 transitions, 9488 flow [2024-06-14 14:07:07,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:07:07,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:07:07,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-14 14:07:07,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5850340136054422 [2024-06-14 14:07:07,848 INFO L175 Difference]: Start difference. First operand has 437 places, 497 transitions, 8359 flow. Second operand 7 states and 172 transitions. [2024-06-14 14:07:07,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 519 transitions, 9488 flow [2024-06-14 14:07:12,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 519 transitions, 9314 flow, removed 40 selfloop flow, removed 3 redundant places. [2024-06-14 14:07:12,351 INFO L231 Difference]: Finished difference. Result has 441 places, 498 transitions, 8409 flow [2024-06-14 14:07:12,351 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8187, PETRI_DIFFERENCE_MINUEND_PLACES=434, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=497, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8409, PETRI_PLACES=441, PETRI_TRANSITIONS=498} [2024-06-14 14:07:12,351 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 398 predicate places. [2024-06-14 14:07:12,351 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 498 transitions, 8409 flow [2024-06-14 14:07:12,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:12,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:12,351 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:12,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-14 14:07:12,352 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:07:12,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:12,352 INFO L85 PathProgramCache]: Analyzing trace with hash 160713024, now seen corresponding path program 7 times [2024-06-14 14:07:12,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:12,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752739472] [2024-06-14 14:07:12,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:12,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:12,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:12,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:12,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:12,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752739472] [2024-06-14 14:07:12,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752739472] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:12,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:12,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:07:12,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546890803] [2024-06-14 14:07:12,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:12,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:07:12,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:12,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:07:12,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:07:12,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:07:12,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 498 transitions, 8409 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:12,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:12,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:07:12,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:13,804 INFO L124 PetriNetUnfolderBase]: 3379/5829 cut-off events. [2024-06-14 14:07:13,804 INFO L125 PetriNetUnfolderBase]: For 967719/967719 co-relation queries the response was YES. [2024-06-14 14:07:13,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44672 conditions, 5829 events. 3379/5829 cut-off events. For 967719/967719 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 40447 event pairs, 549 based on Foata normal form. 2/5828 useless extension candidates. Maximal degree in co-relation 44475. Up to 3483 conditions per place. [2024-06-14 14:07:13,897 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 419 selfloop transitions, 111 changer transitions 0/537 dead transitions. [2024-06-14 14:07:13,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 537 transitions, 10323 flow [2024-06-14 14:07:13,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:07:13,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:07:13,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-14 14:07:13,898 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6224489795918368 [2024-06-14 14:07:13,898 INFO L175 Difference]: Start difference. First operand has 441 places, 498 transitions, 8409 flow. Second operand 7 states and 183 transitions. [2024-06-14 14:07:13,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 537 transitions, 10323 flow [2024-06-14 14:07:18,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 537 transitions, 10096 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-14 14:07:18,912 INFO L231 Difference]: Finished difference. Result has 444 places, 505 transitions, 8693 flow [2024-06-14 14:07:18,912 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8182, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8693, PETRI_PLACES=444, PETRI_TRANSITIONS=505} [2024-06-14 14:07:18,913 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 401 predicate places. [2024-06-14 14:07:18,913 INFO L495 AbstractCegarLoop]: Abstraction has has 444 places, 505 transitions, 8693 flow [2024-06-14 14:07:18,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:18,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:18,913 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:18,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-14 14:07:18,913 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:07:18,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:18,913 INFO L85 PathProgramCache]: Analyzing trace with hash 154046784, now seen corresponding path program 8 times [2024-06-14 14:07:18,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:18,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120687222] [2024-06-14 14:07:18,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:18,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:18,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:19,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:19,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:19,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120687222] [2024-06-14 14:07:19,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120687222] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:19,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:19,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:07:19,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414008960] [2024-06-14 14:07:19,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:19,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:07:19,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:19,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:07:19,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:07:19,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:07:19,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 444 places, 505 transitions, 8693 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:19,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:19,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:07:19,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:20,403 INFO L124 PetriNetUnfolderBase]: 3374/5822 cut-off events. [2024-06-14 14:07:20,403 INFO L125 PetriNetUnfolderBase]: For 967548/967548 co-relation queries the response was YES. [2024-06-14 14:07:20,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45104 conditions, 5822 events. 3374/5822 cut-off events. For 967548/967548 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 40386 event pairs, 537 based on Foata normal form. 2/5821 useless extension candidates. Maximal degree in co-relation 44905. Up to 3481 conditions per place. [2024-06-14 14:07:20,495 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 419 selfloop transitions, 113 changer transitions 0/539 dead transitions. [2024-06-14 14:07:20,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 539 transitions, 10474 flow [2024-06-14 14:07:20,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:07:20,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:07:20,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-14 14:07:20,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6258503401360545 [2024-06-14 14:07:20,496 INFO L175 Difference]: Start difference. First operand has 444 places, 505 transitions, 8693 flow. Second operand 7 states and 184 transitions. [2024-06-14 14:07:20,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 539 transitions, 10474 flow [2024-06-14 14:07:25,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 447 places, 539 transitions, 10244 flow, removed 47 selfloop flow, removed 3 redundant places. [2024-06-14 14:07:25,888 INFO L231 Difference]: Finished difference. Result has 448 places, 506 transitions, 8751 flow [2024-06-14 14:07:25,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8467, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=505, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8751, PETRI_PLACES=448, PETRI_TRANSITIONS=506} [2024-06-14 14:07:25,889 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 405 predicate places. [2024-06-14 14:07:25,889 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 506 transitions, 8751 flow [2024-06-14 14:07:25,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:25,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:25,889 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:25,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-14 14:07:25,890 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:07:25,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:25,890 INFO L85 PathProgramCache]: Analyzing trace with hash -803641798, now seen corresponding path program 1 times [2024-06-14 14:07:25,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:25,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587895811] [2024-06-14 14:07:25,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:25,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:25,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:26,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:26,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:26,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587895811] [2024-06-14 14:07:26,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587895811] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:26,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:26,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:07:26,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009232571] [2024-06-14 14:07:26,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:26,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:07:26,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:26,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:07:26,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:07:26,249 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:07:26,249 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 506 transitions, 8751 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:26,249 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:26,249 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:07:26,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:27,511 INFO L124 PetriNetUnfolderBase]: 3454/5948 cut-off events. [2024-06-14 14:07:27,511 INFO L125 PetriNetUnfolderBase]: For 1097327/1097327 co-relation queries the response was YES. [2024-06-14 14:07:27,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48199 conditions, 5948 events. 3454/5948 cut-off events. For 1097327/1097327 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 41346 event pairs, 614 based on Foata normal form. 2/5935 useless extension candidates. Maximal degree in co-relation 47999. Up to 4667 conditions per place. [2024-06-14 14:07:27,610 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 496 selfloop transitions, 52 changer transitions 4/559 dead transitions. [2024-06-14 14:07:27,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 559 transitions, 10795 flow [2024-06-14 14:07:27,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:07:27,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:07:27,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 242 transitions. [2024-06-14 14:07:27,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5761904761904761 [2024-06-14 14:07:27,611 INFO L175 Difference]: Start difference. First operand has 448 places, 506 transitions, 8751 flow. Second operand 10 states and 242 transitions. [2024-06-14 14:07:27,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 559 transitions, 10795 flow [2024-06-14 14:07:34,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 559 transitions, 10390 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-14 14:07:34,106 INFO L231 Difference]: Finished difference. Result has 453 places, 511 transitions, 8662 flow [2024-06-14 14:07:34,106 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8346, PETRI_DIFFERENCE_MINUEND_PLACES=442, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=457, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8662, PETRI_PLACES=453, PETRI_TRANSITIONS=511} [2024-06-14 14:07:34,107 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 410 predicate places. [2024-06-14 14:07:34,107 INFO L495 AbstractCegarLoop]: Abstraction has has 453 places, 511 transitions, 8662 flow [2024-06-14 14:07:34,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:34,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:34,107 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:34,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-14 14:07:34,108 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:07:34,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:34,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1374578646, now seen corresponding path program 2 times [2024-06-14 14:07:34,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:34,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983440361] [2024-06-14 14:07:34,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:34,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:34,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:34,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:34,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:34,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983440361] [2024-06-14 14:07:34,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983440361] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:34,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:34,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:07:34,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781925064] [2024-06-14 14:07:34,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:34,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:07:34,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:34,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:07:34,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:07:34,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:07:34,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 453 places, 511 transitions, 8662 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:34,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:34,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:07:34,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:35,963 INFO L124 PetriNetUnfolderBase]: 3591/6197 cut-off events. [2024-06-14 14:07:35,963 INFO L125 PetriNetUnfolderBase]: For 1140058/1140058 co-relation queries the response was YES. [2024-06-14 14:07:36,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48951 conditions, 6197 events. 3591/6197 cut-off events. For 1140058/1140058 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 43374 event pairs, 675 based on Foata normal form. 2/6197 useless extension candidates. Maximal degree in co-relation 48751. Up to 5185 conditions per place. [2024-06-14 14:07:36,052 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 511 selfloop transitions, 35 changer transitions 6/559 dead transitions. [2024-06-14 14:07:36,052 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 559 transitions, 10245 flow [2024-06-14 14:07:36,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:07:36,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:07:36,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-14 14:07:36,053 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6041666666666666 [2024-06-14 14:07:36,053 INFO L175 Difference]: Start difference. First operand has 453 places, 511 transitions, 8662 flow. Second operand 8 states and 203 transitions. [2024-06-14 14:07:36,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 559 transitions, 10245 flow [2024-06-14 14:07:43,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 456 places, 559 transitions, 10046 flow, removed 80 selfloop flow, removed 4 redundant places. [2024-06-14 14:07:43,265 INFO L231 Difference]: Finished difference. Result has 458 places, 514 transitions, 8612 flow [2024-06-14 14:07:43,265 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8471, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=511, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=476, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8612, PETRI_PLACES=458, PETRI_TRANSITIONS=514} [2024-06-14 14:07:43,265 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 415 predicate places. [2024-06-14 14:07:43,265 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 514 transitions, 8612 flow [2024-06-14 14:07:43,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:43,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:43,265 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:43,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-14 14:07:43,266 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:07:43,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:43,266 INFO L85 PathProgramCache]: Analyzing trace with hash -1272645634, now seen corresponding path program 3 times [2024-06-14 14:07:43,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:43,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076695931] [2024-06-14 14:07:43,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:43,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:43,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:43,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:43,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:43,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076695931] [2024-06-14 14:07:43,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076695931] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:43,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:43,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:07:43,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50688140] [2024-06-14 14:07:43,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:43,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:07:43,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:43,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:07:43,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:07:43,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:07:43,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 514 transitions, 8612 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:43,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:43,553 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:07:43,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:44,921 INFO L124 PetriNetUnfolderBase]: 3599/6207 cut-off events. [2024-06-14 14:07:44,921 INFO L125 PetriNetUnfolderBase]: For 1162105/1162105 co-relation queries the response was YES. [2024-06-14 14:07:44,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49075 conditions, 6207 events. 3599/6207 cut-off events. For 1162105/1162105 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 43398 event pairs, 860 based on Foata normal form. 2/6205 useless extension candidates. Maximal degree in co-relation 48872. Up to 5461 conditions per place. [2024-06-14 14:07:45,019 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 503 selfloop transitions, 45 changer transitions 2/557 dead transitions. [2024-06-14 14:07:45,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 557 transitions, 10258 flow [2024-06-14 14:07:45,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:07:45,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:07:45,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 216 transitions. [2024-06-14 14:07:45,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-14 14:07:45,020 INFO L175 Difference]: Start difference. First operand has 458 places, 514 transitions, 8612 flow. Second operand 9 states and 216 transitions. [2024-06-14 14:07:45,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 557 transitions, 10258 flow [2024-06-14 14:07:51,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 461 places, 557 transitions, 10198 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-14 14:07:51,011 INFO L231 Difference]: Finished difference. Result has 462 places, 518 transitions, 8815 flow [2024-06-14 14:07:51,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8552, PETRI_DIFFERENCE_MINUEND_PLACES=453, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=471, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8815, PETRI_PLACES=462, PETRI_TRANSITIONS=518} [2024-06-14 14:07:51,012 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 419 predicate places. [2024-06-14 14:07:51,012 INFO L495 AbstractCegarLoop]: Abstraction has has 462 places, 518 transitions, 8815 flow [2024-06-14 14:07:51,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:51,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:51,012 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:51,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-14 14:07:51,012 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:07:51,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:51,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1617188616, now seen corresponding path program 4 times [2024-06-14 14:07:51,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:51,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235964641] [2024-06-14 14:07:51,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:51,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:51,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:51,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:51,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:51,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235964641] [2024-06-14 14:07:51,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235964641] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:51,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:51,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:07:51,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984626487] [2024-06-14 14:07:51,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:51,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:07:51,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:51,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:07:51,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:07:51,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:07:51,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 462 places, 518 transitions, 8815 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:51,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:51,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:07:51,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:52,758 INFO L124 PetriNetUnfolderBase]: 3594/6211 cut-off events. [2024-06-14 14:07:52,758 INFO L125 PetriNetUnfolderBase]: For 1159403/1159403 co-relation queries the response was YES. [2024-06-14 14:07:52,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48890 conditions, 6211 events. 3594/6211 cut-off events. For 1159403/1159403 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 43449 event pairs, 880 based on Foata normal form. 2/6211 useless extension candidates. Maximal degree in co-relation 48686. Up to 5513 conditions per place. [2024-06-14 14:07:52,848 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 502 selfloop transitions, 41 changer transitions 0/550 dead transitions. [2024-06-14 14:07:52,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 550 transitions, 9981 flow [2024-06-14 14:07:52,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:07:52,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:07:52,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 208 transitions. [2024-06-14 14:07:52,849 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5502645502645502 [2024-06-14 14:07:52,850 INFO L175 Difference]: Start difference. First operand has 462 places, 518 transitions, 8815 flow. Second operand 9 states and 208 transitions. [2024-06-14 14:07:52,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 550 transitions, 9981 flow [2024-06-14 14:07:57,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 550 transitions, 9780 flow, removed 69 selfloop flow, removed 6 redundant places. [2024-06-14 14:07:57,497 INFO L231 Difference]: Finished difference. Result has 465 places, 518 transitions, 8701 flow [2024-06-14 14:07:57,497 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8614, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=477, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8701, PETRI_PLACES=465, PETRI_TRANSITIONS=518} [2024-06-14 14:07:57,497 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 422 predicate places. [2024-06-14 14:07:57,498 INFO L495 AbstractCegarLoop]: Abstraction has has 465 places, 518 transitions, 8701 flow [2024-06-14 14:07:57,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:57,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:57,498 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:57,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-14 14:07:57,498 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:07:57,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:57,499 INFO L85 PathProgramCache]: Analyzing trace with hash -175707085, now seen corresponding path program 1 times [2024-06-14 14:07:57,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:57,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952378589] [2024-06-14 14:07:57,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:57,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:57,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:57,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:57,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:57,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952378589] [2024-06-14 14:07:57,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952378589] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:57,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:57,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:07:57,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491750238] [2024-06-14 14:07:57,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:57,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:07:57,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:57,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:07:57,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:07:57,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:07:57,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 465 places, 518 transitions, 8701 flow. Second operand has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:57,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:57,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:07:57,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:58,992 INFO L124 PetriNetUnfolderBase]: 3591/6198 cut-off events. [2024-06-14 14:07:58,992 INFO L125 PetriNetUnfolderBase]: For 1153290/1153290 co-relation queries the response was YES. [2024-06-14 14:07:59,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48641 conditions, 6198 events. 3591/6198 cut-off events. For 1153290/1153290 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 43437 event pairs, 899 based on Foata normal form. 1/6196 useless extension candidates. Maximal degree in co-relation 48435. Up to 5263 conditions per place. [2024-06-14 14:07:59,098 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 398 selfloop transitions, 131 changer transitions 0/536 dead transitions. [2024-06-14 14:07:59,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 471 places, 536 transitions, 10083 flow [2024-06-14 14:07:59,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:07:59,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:07:59,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-14 14:07:59,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884353741496599 [2024-06-14 14:07:59,100 INFO L175 Difference]: Start difference. First operand has 465 places, 518 transitions, 8701 flow. Second operand 7 states and 173 transitions. [2024-06-14 14:07:59,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 471 places, 536 transitions, 10083 flow [2024-06-14 14:08:03,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 463 places, 536 transitions, 9981 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-14 14:08:03,939 INFO L231 Difference]: Finished difference. Result has 464 places, 518 transitions, 8875 flow [2024-06-14 14:08:03,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8599, PETRI_DIFFERENCE_MINUEND_PLACES=457, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8875, PETRI_PLACES=464, PETRI_TRANSITIONS=518} [2024-06-14 14:08:03,940 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 421 predicate places. [2024-06-14 14:08:03,940 INFO L495 AbstractCegarLoop]: Abstraction has has 464 places, 518 transitions, 8875 flow [2024-06-14 14:08:03,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:03,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:03,941 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:08:03,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-14 14:08:03,941 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:08:03,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:03,941 INFO L85 PathProgramCache]: Analyzing trace with hash 522785681, now seen corresponding path program 2 times [2024-06-14 14:08:03,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:03,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812400729] [2024-06-14 14:08:03,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:03,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:03,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:04,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:04,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:04,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812400729] [2024-06-14 14:08:04,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812400729] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:04,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:04,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:08:04,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919950762] [2024-06-14 14:08:04,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:04,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:08:04,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:04,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:08:04,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:08:04,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:08:04,208 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 464 places, 518 transitions, 8875 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:04,208 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:04,208 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:08:04,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:05,653 INFO L124 PetriNetUnfolderBase]: 3596/6207 cut-off events. [2024-06-14 14:08:05,653 INFO L125 PetriNetUnfolderBase]: For 1170615/1170615 co-relation queries the response was YES. [2024-06-14 14:08:05,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49050 conditions, 6207 events. 3596/6207 cut-off events. For 1170615/1170615 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 43523 event pairs, 899 based on Foata normal form. 1/6205 useless extension candidates. Maximal degree in co-relation 48843. Up to 5269 conditions per place. [2024-06-14 14:08:05,744 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 390 selfloop transitions, 146 changer transitions 0/543 dead transitions. [2024-06-14 14:08:05,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 543 transitions, 10327 flow [2024-06-14 14:08:05,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:08:05,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:08:05,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 255 transitions. [2024-06-14 14:08:05,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.551948051948052 [2024-06-14 14:08:05,745 INFO L175 Difference]: Start difference. First operand has 464 places, 518 transitions, 8875 flow. Second operand 11 states and 255 transitions. [2024-06-14 14:08:05,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 543 transitions, 10327 flow [2024-06-14 14:08:12,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 468 places, 543 transitions, 10042 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-14 14:08:12,814 INFO L231 Difference]: Finished difference. Result has 469 places, 521 transitions, 8941 flow [2024-06-14 14:08:12,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8598, PETRI_DIFFERENCE_MINUEND_PLACES=458, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8941, PETRI_PLACES=469, PETRI_TRANSITIONS=521} [2024-06-14 14:08:12,814 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 426 predicate places. [2024-06-14 14:08:12,814 INFO L495 AbstractCegarLoop]: Abstraction has has 469 places, 521 transitions, 8941 flow [2024-06-14 14:08:12,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:12,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:12,815 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:08:12,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-14 14:08:12,815 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:08:12,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:12,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1578181781, now seen corresponding path program 3 times [2024-06-14 14:08:12,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:12,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313445398] [2024-06-14 14:08:12,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:12,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:12,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:13,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:13,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:13,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313445398] [2024-06-14 14:08:13,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313445398] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:13,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:13,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:08:13,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767695250] [2024-06-14 14:08:13,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:13,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:08:13,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:13,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:08:13,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:08:13,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:08:13,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 469 places, 521 transitions, 8941 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:13,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:13,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:08:13,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:14,431 INFO L124 PetriNetUnfolderBase]: 3593/6203 cut-off events. [2024-06-14 14:08:14,431 INFO L125 PetriNetUnfolderBase]: For 1160373/1160373 co-relation queries the response was YES. [2024-06-14 14:08:14,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48918 conditions, 6203 events. 3593/6203 cut-off events. For 1160373/1160373 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 43440 event pairs, 899 based on Foata normal form. 1/6201 useless extension candidates. Maximal degree in co-relation 48711. Up to 5266 conditions per place. [2024-06-14 14:08:14,533 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 394 selfloop transitions, 139 changer transitions 0/540 dead transitions. [2024-06-14 14:08:14,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 477 places, 540 transitions, 10053 flow [2024-06-14 14:08:14,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:08:14,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:08:14,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 214 transitions. [2024-06-14 14:08:14,534 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5661375661375662 [2024-06-14 14:08:14,534 INFO L175 Difference]: Start difference. First operand has 469 places, 521 transitions, 8941 flow. Second operand 9 states and 214 transitions. [2024-06-14 14:08:14,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 477 places, 540 transitions, 10053 flow [2024-06-14 14:08:22,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 467 places, 540 transitions, 9690 flow, removed 7 selfloop flow, removed 10 redundant places. [2024-06-14 14:08:22,558 INFO L231 Difference]: Finished difference. Result has 468 places, 521 transitions, 8871 flow [2024-06-14 14:08:22,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8578, PETRI_DIFFERENCE_MINUEND_PLACES=459, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=382, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8871, PETRI_PLACES=468, PETRI_TRANSITIONS=521} [2024-06-14 14:08:22,558 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 425 predicate places. [2024-06-14 14:08:22,558 INFO L495 AbstractCegarLoop]: Abstraction has has 468 places, 521 transitions, 8871 flow [2024-06-14 14:08:22,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:22,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:22,559 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:08:22,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-14 14:08:22,559 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:08:22,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:22,559 INFO L85 PathProgramCache]: Analyzing trace with hash -1549890328, now seen corresponding path program 5 times [2024-06-14 14:08:22,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:22,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219926829] [2024-06-14 14:08:22,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:22,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:22,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:22,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:22,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:22,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219926829] [2024-06-14 14:08:22,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219926829] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:22,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:22,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:08:22,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595242866] [2024-06-14 14:08:22,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:22,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:08:22,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:22,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:08:22,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:08:22,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:08:22,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 468 places, 521 transitions, 8871 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:22,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:22,843 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:08:22,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:24,301 INFO L124 PetriNetUnfolderBase]: 3614/6239 cut-off events. [2024-06-14 14:08:24,301 INFO L125 PetriNetUnfolderBase]: For 1192369/1192369 co-relation queries the response was YES. [2024-06-14 14:08:24,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49637 conditions, 6239 events. 3614/6239 cut-off events. For 1192369/1192369 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 43611 event pairs, 880 based on Foata normal form. 2/6239 useless extension candidates. Maximal degree in co-relation 49430. Up to 5328 conditions per place. [2024-06-14 14:08:24,395 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 410 selfloop transitions, 141 changer transitions 0/558 dead transitions. [2024-06-14 14:08:24,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 478 places, 558 transitions, 10515 flow [2024-06-14 14:08:24,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:08:24,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:08:24,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 248 transitions. [2024-06-14 14:08:24,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5367965367965368 [2024-06-14 14:08:24,396 INFO L175 Difference]: Start difference. First operand has 468 places, 521 transitions, 8871 flow. Second operand 11 states and 248 transitions. [2024-06-14 14:08:24,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 478 places, 558 transitions, 10515 flow [2024-06-14 14:08:29,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 469 places, 558 transitions, 10224 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-14 14:08:29,911 INFO L231 Difference]: Finished difference. Result has 470 places, 525 transitions, 9053 flow [2024-06-14 14:08:29,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8582, PETRI_DIFFERENCE_MINUEND_PLACES=459, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=382, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9053, PETRI_PLACES=470, PETRI_TRANSITIONS=525} [2024-06-14 14:08:29,912 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 427 predicate places. [2024-06-14 14:08:29,912 INFO L495 AbstractCegarLoop]: Abstraction has has 470 places, 525 transitions, 9053 flow [2024-06-14 14:08:29,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:29,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:29,912 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:08:29,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-14 14:08:29,912 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:08:29,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:29,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1087519112, now seen corresponding path program 6 times [2024-06-14 14:08:29,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:29,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991418846] [2024-06-14 14:08:29,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:29,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:29,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:30,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:30,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:30,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991418846] [2024-06-14 14:08:30,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991418846] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:30,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:30,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:08:30,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900342330] [2024-06-14 14:08:30,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:30,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:08:30,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:30,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:08:30,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:08:30,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:08:30,190 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 525 transitions, 9053 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:30,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:30,190 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:08:30,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:31,709 INFO L124 PetriNetUnfolderBase]: 3622/6256 cut-off events. [2024-06-14 14:08:31,709 INFO L125 PetriNetUnfolderBase]: For 1194756/1194756 co-relation queries the response was YES. [2024-06-14 14:08:31,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49878 conditions, 6256 events. 3622/6256 cut-off events. For 1194756/1194756 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 43815 event pairs, 887 based on Foata normal form. 2/6256 useless extension candidates. Maximal degree in co-relation 49671. Up to 5007 conditions per place. [2024-06-14 14:08:31,800 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 271 selfloop transitions, 279 changer transitions 0/557 dead transitions. [2024-06-14 14:08:31,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 481 places, 557 transitions, 10601 flow [2024-06-14 14:08:31,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 14:08:31,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 14:08:31,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 270 transitions. [2024-06-14 14:08:31,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2024-06-14 14:08:31,801 INFO L175 Difference]: Start difference. First operand has 470 places, 525 transitions, 9053 flow. Second operand 12 states and 270 transitions. [2024-06-14 14:08:31,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 481 places, 557 transitions, 10601 flow [2024-06-14 14:08:37,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 474 places, 557 transitions, 10289 flow, removed 71 selfloop flow, removed 7 redundant places. [2024-06-14 14:08:37,468 INFO L231 Difference]: Finished difference. Result has 475 places, 527 transitions, 9402 flow [2024-06-14 14:08:37,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8769, PETRI_DIFFERENCE_MINUEND_PLACES=463, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=525, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=277, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=9402, PETRI_PLACES=475, PETRI_TRANSITIONS=527} [2024-06-14 14:08:37,469 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 432 predicate places. [2024-06-14 14:08:37,469 INFO L495 AbstractCegarLoop]: Abstraction has has 475 places, 527 transitions, 9402 flow [2024-06-14 14:08:37,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:37,469 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:37,469 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:08:37,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-14 14:08:37,469 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:08:37,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:37,469 INFO L85 PathProgramCache]: Analyzing trace with hash 850943160, now seen corresponding path program 7 times [2024-06-14 14:08:37,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:37,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405681699] [2024-06-14 14:08:37,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:37,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:37,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:37,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:37,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:37,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405681699] [2024-06-14 14:08:37,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405681699] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:37,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:37,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:08:37,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142078540] [2024-06-14 14:08:37,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:37,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:08:37,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:37,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:08:37,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:08:37,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:08:37,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 475 places, 527 transitions, 9402 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:37,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:37,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:08:37,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:39,095 INFO L124 PetriNetUnfolderBase]: 3630/6268 cut-off events. [2024-06-14 14:08:39,095 INFO L125 PetriNetUnfolderBase]: For 1210755/1210755 co-relation queries the response was YES. [2024-06-14 14:08:39,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50513 conditions, 6268 events. 3630/6268 cut-off events. For 1210755/1210755 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 43895 event pairs, 887 based on Foata normal form. 2/6268 useless extension candidates. Maximal degree in co-relation 50304. Up to 5019 conditions per place. [2024-06-14 14:08:39,200 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 272 selfloop transitions, 276 changer transitions 0/555 dead transitions. [2024-06-14 14:08:39,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 485 places, 555 transitions, 10914 flow [2024-06-14 14:08:39,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:08:39,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:08:39,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 249 transitions. [2024-06-14 14:08:39,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.538961038961039 [2024-06-14 14:08:39,201 INFO L175 Difference]: Start difference. First operand has 475 places, 527 transitions, 9402 flow. Second operand 11 states and 249 transitions. [2024-06-14 14:08:39,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 485 places, 555 transitions, 10914 flow [2024-06-14 14:08:45,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 475 places, 555 transitions, 10301 flow, removed 29 selfloop flow, removed 10 redundant places. [2024-06-14 14:08:45,448 INFO L231 Difference]: Finished difference. Result has 476 places, 529 transitions, 9420 flow [2024-06-14 14:08:45,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8789, PETRI_DIFFERENCE_MINUEND_PLACES=465, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=527, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=274, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9420, PETRI_PLACES=476, PETRI_TRANSITIONS=529} [2024-06-14 14:08:45,448 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 433 predicate places. [2024-06-14 14:08:45,448 INFO L495 AbstractCegarLoop]: Abstraction has has 476 places, 529 transitions, 9420 flow [2024-06-14 14:08:45,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:45,448 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:45,448 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:08:45,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-14 14:08:45,448 INFO L420 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:08:45,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:45,449 INFO L85 PathProgramCache]: Analyzing trace with hash -893564970, now seen corresponding path program 8 times [2024-06-14 14:08:45,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:45,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104816776] [2024-06-14 14:08:45,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:45,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:45,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:45,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:45,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:45,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104816776] [2024-06-14 14:08:45,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104816776] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:45,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:45,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:08:45,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361970018] [2024-06-14 14:08:45,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:45,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:08:45,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:45,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:08:45,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:08:45,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:08:45,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 476 places, 529 transitions, 9420 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:45,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:45,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:08:45,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:47,247 INFO L124 PetriNetUnfolderBase]: 3661/6311 cut-off events. [2024-06-14 14:08:47,247 INFO L125 PetriNetUnfolderBase]: For 1316701/1316701 co-relation queries the response was YES. [2024-06-14 14:08:47,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50940 conditions, 6311 events. 3661/6311 cut-off events. For 1316701/1316701 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 44212 event pairs, 878 based on Foata normal form. 12/6321 useless extension candidates. Maximal degree in co-relation 50730. Up to 5479 conditions per place. [2024-06-14 14:08:47,344 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 477 selfloop transitions, 81 changer transitions 0/565 dead transitions. [2024-06-14 14:08:47,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 483 places, 565 transitions, 10734 flow [2024-06-14 14:08:47,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:08:47,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:08:47,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-14 14:08:47,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6011904761904762 [2024-06-14 14:08:47,345 INFO L175 Difference]: Start difference. First operand has 476 places, 529 transitions, 9420 flow. Second operand 8 states and 202 transitions. [2024-06-14 14:08:47,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 483 places, 565 transitions, 10734 flow [2024-06-14 14:08:53,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 474 places, 565 transitions, 10067 flow, removed 59 selfloop flow, removed 9 redundant places. [2024-06-14 14:08:53,539 INFO L231 Difference]: Finished difference. Result has 475 places, 531 transitions, 9025 flow [2024-06-14 14:08:53,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8753, PETRI_DIFFERENCE_MINUEND_PLACES=467, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=448, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9025, PETRI_PLACES=475, PETRI_TRANSITIONS=531} [2024-06-14 14:08:53,540 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 432 predicate places. [2024-06-14 14:08:53,540 INFO L495 AbstractCegarLoop]: Abstraction has has 475 places, 531 transitions, 9025 flow [2024-06-14 14:08:53,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:53,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:53,540 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:08:53,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-14 14:08:53,540 INFO L420 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:08:53,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:53,540 INFO L85 PathProgramCache]: Analyzing trace with hash -784624589, now seen corresponding path program 4 times [2024-06-14 14:08:53,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:53,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161317647] [2024-06-14 14:08:53,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:53,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:53,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:53,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:53,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:53,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161317647] [2024-06-14 14:08:53,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161317647] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:53,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:53,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:08:53,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487893830] [2024-06-14 14:08:53,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:53,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:08:53,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:53,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:08:53,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:08:53,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:08:53,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 475 places, 531 transitions, 9025 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:53,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:53,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:08:53,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:55,164 INFO L124 PetriNetUnfolderBase]: 3682/6328 cut-off events. [2024-06-14 14:08:55,165 INFO L125 PetriNetUnfolderBase]: For 1238293/1238293 co-relation queries the response was YES. [2024-06-14 14:08:55,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50902 conditions, 6328 events. 3682/6328 cut-off events. For 1238293/1238293 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 44317 event pairs, 928 based on Foata normal form. 1/6322 useless extension candidates. Maximal degree in co-relation 50691. Up to 5098 conditions per place. [2024-06-14 14:08:55,267 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 311 selfloop transitions, 249 changer transitions 0/567 dead transitions. [2024-06-14 14:08:55,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 486 places, 567 transitions, 10915 flow [2024-06-14 14:08:55,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 14:08:55,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 14:08:55,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 264 transitions. [2024-06-14 14:08:55,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-06-14 14:08:55,268 INFO L175 Difference]: Start difference. First operand has 475 places, 531 transitions, 9025 flow. Second operand 12 states and 264 transitions. [2024-06-14 14:08:55,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 486 places, 567 transitions, 10915 flow [2024-06-14 14:09:03,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 481 places, 567 transitions, 10690 flow, removed 43 selfloop flow, removed 5 redundant places. [2024-06-14 14:09:03,121 INFO L231 Difference]: Finished difference. Result has 482 places, 540 transitions, 9435 flow [2024-06-14 14:09:03,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8800, PETRI_DIFFERENCE_MINUEND_PLACES=470, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=531, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=240, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=9435, PETRI_PLACES=482, PETRI_TRANSITIONS=540} [2024-06-14 14:09:03,121 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 439 predicate places. [2024-06-14 14:09:03,121 INFO L495 AbstractCegarLoop]: Abstraction has has 482 places, 540 transitions, 9435 flow [2024-06-14 14:09:03,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:03,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:09:03,121 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:09:03,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-14 14:09:03,122 INFO L420 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:09:03,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:09:03,122 INFO L85 PathProgramCache]: Analyzing trace with hash -1224952265, now seen corresponding path program 5 times [2024-06-14 14:09:03,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:09:03,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829822307] [2024-06-14 14:09:03,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:09:03,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:09:03,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:09:03,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:09:03,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:09:03,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829822307] [2024-06-14 14:09:03,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829822307] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:09:03,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:09:03,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:09:03,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034748907] [2024-06-14 14:09:03,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:09:03,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:09:03,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:09:03,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:09:03,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:09:03,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:09:03,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 482 places, 540 transitions, 9435 flow. Second operand has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:03,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:09:03,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:09:03,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:09:04,835 INFO L124 PetriNetUnfolderBase]: 3687/6352 cut-off events. [2024-06-14 14:09:04,835 INFO L125 PetriNetUnfolderBase]: For 1248108/1248112 co-relation queries the response was YES. [2024-06-14 14:09:04,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50960 conditions, 6352 events. 3687/6352 cut-off events. For 1248108/1248112 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 44596 event pairs, 920 based on Foata normal form. 5/6354 useless extension candidates. Maximal degree in co-relation 50748. Up to 5502 conditions per place. [2024-06-14 14:09:04,943 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 465 selfloop transitions, 91 changer transitions 0/563 dead transitions. [2024-06-14 14:09:04,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 490 places, 563 transitions, 10934 flow [2024-06-14 14:09:04,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:09:04,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:09:04,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 201 transitions. [2024-06-14 14:09:04,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5317460317460317 [2024-06-14 14:09:04,944 INFO L175 Difference]: Start difference. First operand has 482 places, 540 transitions, 9435 flow. Second operand 9 states and 201 transitions. [2024-06-14 14:09:04,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 490 places, 563 transitions, 10934 flow [2024-06-14 14:09:14,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 482 places, 563 transitions, 10553 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-06-14 14:09:14,030 INFO L231 Difference]: Finished difference. Result has 483 places, 543 transitions, 9292 flow [2024-06-14 14:09:14,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9057, PETRI_DIFFERENCE_MINUEND_PLACES=474, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=540, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=452, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9292, PETRI_PLACES=483, PETRI_TRANSITIONS=543} [2024-06-14 14:09:14,031 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 440 predicate places. [2024-06-14 14:09:14,031 INFO L495 AbstractCegarLoop]: Abstraction has has 483 places, 543 transitions, 9292 flow [2024-06-14 14:09:14,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:14,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:09:14,032 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:09:14,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-14 14:09:14,032 INFO L420 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:09:14,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:09:14,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1512750081, now seen corresponding path program 6 times [2024-06-14 14:09:14,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:09:14,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681601556] [2024-06-14 14:09:14,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:09:14,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:09:14,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:09:14,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:09:14,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:09:14,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681601556] [2024-06-14 14:09:14,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681601556] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:09:14,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:09:14,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:09:14,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515560711] [2024-06-14 14:09:14,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:09:14,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:09:14,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:09:14,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:09:14,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:09:14,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:09:14,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 483 places, 543 transitions, 9292 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:14,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:09:14,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:09:14,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:09:15,846 INFO L124 PetriNetUnfolderBase]: 3700/6353 cut-off events. [2024-06-14 14:09:15,846 INFO L125 PetriNetUnfolderBase]: For 1275408/1275408 co-relation queries the response was YES. [2024-06-14 14:09:15,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50883 conditions, 6353 events. 3700/6353 cut-off events. For 1275408/1275408 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 44491 event pairs, 936 based on Foata normal form. 1/6345 useless extension candidates. Maximal degree in co-relation 50670. Up to 5520 conditions per place. [2024-06-14 14:09:15,953 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 464 selfloop transitions, 101 changer transitions 0/572 dead transitions. [2024-06-14 14:09:15,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 494 places, 572 transitions, 10830 flow [2024-06-14 14:09:15,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 14:09:15,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 14:09:15,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 255 transitions. [2024-06-14 14:09:15,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5059523809523809 [2024-06-14 14:09:15,954 INFO L175 Difference]: Start difference. First operand has 483 places, 543 transitions, 9292 flow. Second operand 12 states and 255 transitions. [2024-06-14 14:09:15,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 494 places, 572 transitions, 10830 flow [2024-06-14 14:09:23,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 488 places, 572 transitions, 10639 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-14 14:09:23,487 INFO L231 Difference]: Finished difference. Result has 489 places, 549 transitions, 9377 flow [2024-06-14 14:09:23,488 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9101, PETRI_DIFFERENCE_MINUEND_PLACES=477, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=543, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=9377, PETRI_PLACES=489, PETRI_TRANSITIONS=549} [2024-06-14 14:09:23,488 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 446 predicate places. [2024-06-14 14:09:23,488 INFO L495 AbstractCegarLoop]: Abstraction has has 489 places, 549 transitions, 9377 flow [2024-06-14 14:09:23,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:23,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:09:23,488 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:09:23,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-14 14:09:23,488 INFO L420 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:09:23,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:09:23,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1541314333, now seen corresponding path program 7 times [2024-06-14 14:09:23,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:09:23,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413727661] [2024-06-14 14:09:23,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:09:23,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:09:23,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:09:23,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:09:23,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:09:23,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413727661] [2024-06-14 14:09:23,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413727661] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:09:23,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:09:23,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:09:23,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892471698] [2024-06-14 14:09:23,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:09:23,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:09:23,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:09:23,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:09:23,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:09:23,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:09:23,737 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 489 places, 549 transitions, 9377 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:23,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:09:23,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:09:23,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:09:25,144 INFO L124 PetriNetUnfolderBase]: 3697/6349 cut-off events. [2024-06-14 14:09:25,144 INFO L125 PetriNetUnfolderBase]: For 1280879/1280879 co-relation queries the response was YES. [2024-06-14 14:09:25,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50851 conditions, 6349 events. 3697/6349 cut-off events. For 1280879/1280879 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 44510 event pairs, 936 based on Foata normal form. 1/6341 useless extension candidates. Maximal degree in co-relation 50637. Up to 5116 conditions per place. [2024-06-14 14:09:25,251 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 306 selfloop transitions, 258 changer transitions 0/571 dead transitions. [2024-06-14 14:09:25,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 499 places, 571 transitions, 10851 flow [2024-06-14 14:09:25,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:09:25,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:09:25,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 243 transitions. [2024-06-14 14:09:25,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.525974025974026 [2024-06-14 14:09:25,252 INFO L175 Difference]: Start difference. First operand has 489 places, 549 transitions, 9377 flow. Second operand 11 states and 243 transitions. [2024-06-14 14:09:25,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 499 places, 571 transitions, 10851 flow [2024-06-14 14:09:31,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 491 places, 571 transitions, 10723 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-14 14:09:31,413 INFO L231 Difference]: Finished difference. Result has 492 places, 549 transitions, 9772 flow [2024-06-14 14:09:31,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9249, PETRI_DIFFERENCE_MINUEND_PLACES=481, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=549, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=258, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9772, PETRI_PLACES=492, PETRI_TRANSITIONS=549} [2024-06-14 14:09:31,413 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 449 predicate places. [2024-06-14 14:09:31,414 INFO L495 AbstractCegarLoop]: Abstraction has has 492 places, 549 transitions, 9772 flow [2024-06-14 14:09:31,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:31,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:09:31,414 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:09:31,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-14 14:09:31,414 INFO L420 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:09:31,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:09:31,415 INFO L85 PathProgramCache]: Analyzing trace with hash -1437689881, now seen corresponding path program 8 times [2024-06-14 14:09:31,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:09:31,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917821307] [2024-06-14 14:09:31,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:09:31,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:09:31,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:09:31,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:09:31,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:09:31,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917821307] [2024-06-14 14:09:31,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917821307] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:09:31,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:09:31,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:09:31,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734725193] [2024-06-14 14:09:31,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:09:31,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:09:31,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:09:31,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:09:31,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:09:31,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:09:31,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 492 places, 549 transitions, 9772 flow. Second operand has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:31,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:09:31,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:09:31,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:09:33,006 INFO L124 PetriNetUnfolderBase]: 3702/6379 cut-off events. [2024-06-14 14:09:33,006 INFO L125 PetriNetUnfolderBase]: For 1299961/1299965 co-relation queries the response was YES. [2024-06-14 14:09:33,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51677 conditions, 6379 events. 3702/6379 cut-off events. For 1299961/1299965 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 44831 event pairs, 920 based on Foata normal form. 5/6381 useless extension candidates. Maximal degree in co-relation 51461. Up to 5522 conditions per place. [2024-06-14 14:09:33,107 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 468 selfloop transitions, 92 changer transitions 0/567 dead transitions. [2024-06-14 14:09:33,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 498 places, 567 transitions, 11267 flow [2024-06-14 14:09:33,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:09:33,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:09:33,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 162 transitions. [2024-06-14 14:09:33,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5510204081632653 [2024-06-14 14:09:33,108 INFO L175 Difference]: Start difference. First operand has 492 places, 549 transitions, 9772 flow. Second operand 7 states and 162 transitions. [2024-06-14 14:09:33,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 498 places, 567 transitions, 11267 flow [2024-06-14 14:09:41,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 488 places, 567 transitions, 10831 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-14 14:09:41,608 INFO L231 Difference]: Finished difference. Result has 489 places, 552 transitions, 9571 flow [2024-06-14 14:09:41,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9339, PETRI_DIFFERENCE_MINUEND_PLACES=482, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=549, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=460, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9571, PETRI_PLACES=489, PETRI_TRANSITIONS=552} [2024-06-14 14:09:41,608 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 446 predicate places. [2024-06-14 14:09:41,609 INFO L495 AbstractCegarLoop]: Abstraction has has 489 places, 552 transitions, 9571 flow [2024-06-14 14:09:41,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:41,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:09:41,609 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:09:41,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-14 14:09:41,609 INFO L420 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:09:41,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:09:41,610 INFO L85 PathProgramCache]: Analyzing trace with hash 692040533, now seen corresponding path program 9 times [2024-06-14 14:09:41,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:09:41,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17639997] [2024-06-14 14:09:41,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:09:41,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:09:41,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:09:41,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:09:41,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:09:41,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17639997] [2024-06-14 14:09:41,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17639997] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:09:41,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:09:41,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:09:41,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108006905] [2024-06-14 14:09:41,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:09:41,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:09:41,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:09:41,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:09:41,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:09:41,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:09:41,846 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 489 places, 552 transitions, 9571 flow. Second operand has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:41,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:09:41,846 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:09:41,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:09:43,289 INFO L124 PetriNetUnfolderBase]: 3699/6375 cut-off events. [2024-06-14 14:09:43,289 INFO L125 PetriNetUnfolderBase]: For 1305063/1305067 co-relation queries the response was YES. [2024-06-14 14:09:43,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51023 conditions, 6375 events. 3699/6375 cut-off events. For 1305063/1305067 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 44832 event pairs, 920 based on Foata normal form. 5/6377 useless extension candidates. Maximal degree in co-relation 50807. Up to 5119 conditions per place. [2024-06-14 14:09:43,395 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 309 selfloop transitions, 253 changer transitions 0/569 dead transitions. [2024-06-14 14:09:43,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 497 places, 569 transitions, 11033 flow [2024-06-14 14:09:43,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:09:43,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:09:43,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 206 transitions. [2024-06-14 14:09:43,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.544973544973545 [2024-06-14 14:09:43,396 INFO L175 Difference]: Start difference. First operand has 489 places, 552 transitions, 9571 flow. Second operand 9 states and 206 transitions. [2024-06-14 14:09:43,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 497 places, 569 transitions, 11033 flow [2024-06-14 14:09:51,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 492 places, 569 transitions, 10847 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-14 14:09:51,955 INFO L231 Difference]: Finished difference. Result has 493 places, 552 transitions, 9897 flow [2024-06-14 14:09:51,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9385, PETRI_DIFFERENCE_MINUEND_PLACES=484, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=552, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=253, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9897, PETRI_PLACES=493, PETRI_TRANSITIONS=552} [2024-06-14 14:09:51,956 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 450 predicate places. [2024-06-14 14:09:51,956 INFO L495 AbstractCegarLoop]: Abstraction has has 493 places, 552 transitions, 9897 flow [2024-06-14 14:09:51,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:51,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:09:51,956 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:09:51,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2024-06-14 14:09:51,957 INFO L420 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:09:51,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:09:51,957 INFO L85 PathProgramCache]: Analyzing trace with hash -1826321551, now seen corresponding path program 10 times [2024-06-14 14:09:51,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:09:51,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070940692] [2024-06-14 14:09:51,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:09:51,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:09:51,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:09:52,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:09:52,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:09:52,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070940692] [2024-06-14 14:09:52,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070940692] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:09:52,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:09:52,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:09:52,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30437865] [2024-06-14 14:09:52,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:09:52,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:09:52,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:09:52,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:09:52,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:09:52,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:09:52,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 493 places, 552 transitions, 9897 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:52,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:09:52,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:09:52,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:09:53,832 INFO L124 PetriNetUnfolderBase]: 3712/6376 cut-off events. [2024-06-14 14:09:53,833 INFO L125 PetriNetUnfolderBase]: For 1337462/1337462 co-relation queries the response was YES. [2024-06-14 14:09:53,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51800 conditions, 6376 events. 3712/6376 cut-off events. For 1337462/1337462 co-relation queries the response was YES. Maximal size of possible extension queue 507. Compared 44780 event pairs, 936 based on Foata normal form. 1/6368 useless extension candidates. Maximal degree in co-relation 51583. Up to 5429 conditions per place. [2024-06-14 14:09:53,930 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 402 selfloop transitions, 168 changer transitions 0/577 dead transitions. [2024-06-14 14:09:53,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 502 places, 577 transitions, 11773 flow [2024-06-14 14:09:53,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:09:53,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:09:53,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 225 transitions. [2024-06-14 14:09:53,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2024-06-14 14:09:53,931 INFO L175 Difference]: Start difference. First operand has 493 places, 552 transitions, 9897 flow. Second operand 10 states and 225 transitions. [2024-06-14 14:09:53,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 502 places, 577 transitions, 11773 flow [2024-06-14 14:10:01,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 494 places, 577 transitions, 11316 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-14 14:10:01,672 INFO L231 Difference]: Finished difference. Result has 495 places, 558 transitions, 9874 flow [2024-06-14 14:10:01,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9446, PETRI_DIFFERENCE_MINUEND_PLACES=485, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=552, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9874, PETRI_PLACES=495, PETRI_TRANSITIONS=558} [2024-06-14 14:10:01,673 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 452 predicate places. [2024-06-14 14:10:01,673 INFO L495 AbstractCegarLoop]: Abstraction has has 495 places, 558 transitions, 9874 flow [2024-06-14 14:10:01,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:01,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:10:01,673 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:10:01,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2024-06-14 14:10:01,673 INFO L420 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:10:01,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:10:01,673 INFO L85 PathProgramCache]: Analyzing trace with hash -64268625, now seen corresponding path program 11 times [2024-06-14 14:10:01,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:10:01,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333886348] [2024-06-14 14:10:01,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:10:01,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:10:01,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:10:01,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:10:01,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:10:01,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333886348] [2024-06-14 14:10:01,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333886348] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:10:01,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:10:01,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:10:01,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977184271] [2024-06-14 14:10:01,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:10:01,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:10:01,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:10:01,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:10:01,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:10:01,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:10:01,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 495 places, 558 transitions, 9874 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:01,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:10:01,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:10:01,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:10:03,400 INFO L124 PetriNetUnfolderBase]: 3717/6385 cut-off events. [2024-06-14 14:10:03,400 INFO L125 PetriNetUnfolderBase]: For 1353511/1353511 co-relation queries the response was YES. [2024-06-14 14:10:03,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51747 conditions, 6385 events. 3717/6385 cut-off events. For 1353511/1353511 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 44751 event pairs, 936 based on Foata normal form. 1/6377 useless extension candidates. Maximal degree in co-relation 51529. Up to 5140 conditions per place. [2024-06-14 14:10:03,764 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 309 selfloop transitions, 267 changer transitions 0/583 dead transitions. [2024-06-14 14:10:03,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 506 places, 583 transitions, 12025 flow [2024-06-14 14:10:03,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 14:10:03,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 14:10:03,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 262 transitions. [2024-06-14 14:10:03,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5198412698412699 [2024-06-14 14:10:03,765 INFO L175 Difference]: Start difference. First operand has 495 places, 558 transitions, 9874 flow. Second operand 12 states and 262 transitions. [2024-06-14 14:10:03,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 506 places, 583 transitions, 12025 flow [2024-06-14 14:10:09,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 496 places, 583 transitions, 11295 flow, removed 9 selfloop flow, removed 10 redundant places. [2024-06-14 14:10:09,904 INFO L231 Difference]: Finished difference. Result has 497 places, 561 transitions, 9727 flow [2024-06-14 14:10:09,904 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9156, PETRI_DIFFERENCE_MINUEND_PLACES=485, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=558, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=264, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=9727, PETRI_PLACES=497, PETRI_TRANSITIONS=561} [2024-06-14 14:10:09,904 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 454 predicate places. [2024-06-14 14:10:09,904 INFO L495 AbstractCegarLoop]: Abstraction has has 497 places, 561 transitions, 9727 flow [2024-06-14 14:10:09,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:09,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:10:09,905 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:10:09,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2024-06-14 14:10:09,905 INFO L420 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:10:09,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:10:09,905 INFO L85 PathProgramCache]: Analyzing trace with hash 564458419, now seen corresponding path program 12 times [2024-06-14 14:10:09,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:10:09,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373370550] [2024-06-14 14:10:09,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:10:09,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:10:09,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:10:10,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:10:10,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:10:10,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373370550] [2024-06-14 14:10:10,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373370550] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:10:10,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:10:10,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:10:10,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879378901] [2024-06-14 14:10:10,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:10:10,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:10:10,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:10:10,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:10:10,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:10:10,155 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:10:10,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 497 places, 561 transitions, 9727 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:10,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:10:10,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:10:10,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:10:11,531 INFO L124 PetriNetUnfolderBase]: 3714/6381 cut-off events. [2024-06-14 14:10:11,531 INFO L125 PetriNetUnfolderBase]: For 1356482/1356482 co-relation queries the response was YES. [2024-06-14 14:10:11,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51665 conditions, 6381 events. 3714/6381 cut-off events. For 1356482/1356482 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 44821 event pairs, 936 based on Foata normal form. 1/6373 useless extension candidates. Maximal degree in co-relation 51447. Up to 5137 conditions per place. [2024-06-14 14:10:11,638 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 309 selfloop transitions, 264 changer transitions 0/580 dead transitions. [2024-06-14 14:10:11,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 506 places, 580 transitions, 11525 flow [2024-06-14 14:10:11,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:10:11,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:10:11,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 225 transitions. [2024-06-14 14:10:11,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2024-06-14 14:10:11,640 INFO L175 Difference]: Start difference. First operand has 497 places, 561 transitions, 9727 flow. Second operand 10 states and 225 transitions. [2024-06-14 14:10:11,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 506 places, 580 transitions, 11525 flow [2024-06-14 14:10:21,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 497 places, 580 transitions, 10836 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-14 14:10:21,056 INFO L231 Difference]: Finished difference. Result has 498 places, 561 transitions, 9574 flow [2024-06-14 14:10:21,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9038, PETRI_DIFFERENCE_MINUEND_PLACES=488, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=264, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9574, PETRI_PLACES=498, PETRI_TRANSITIONS=561} [2024-06-14 14:10:21,057 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 455 predicate places. [2024-06-14 14:10:21,057 INFO L495 AbstractCegarLoop]: Abstraction has has 498 places, 561 transitions, 9574 flow [2024-06-14 14:10:21,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:21,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:10:21,057 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:10:21,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2024-06-14 14:10:21,057 INFO L420 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:10:21,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:10:21,058 INFO L85 PathProgramCache]: Analyzing trace with hash 570887509, now seen corresponding path program 13 times [2024-06-14 14:10:21,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:10:21,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105287587] [2024-06-14 14:10:21,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:10:21,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:10:21,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:10:21,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:10:21,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:10:21,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105287587] [2024-06-14 14:10:21,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105287587] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:10:21,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:10:21,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:10:21,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217904932] [2024-06-14 14:10:21,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:10:21,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:10:21,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:10:21,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:10:21,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:10:21,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:10:21,306 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 498 places, 561 transitions, 9574 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:21,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:10:21,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:10:21,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:10:22,790 INFO L124 PetriNetUnfolderBase]: 3719/6390 cut-off events. [2024-06-14 14:10:22,790 INFO L125 PetriNetUnfolderBase]: For 1370648/1370648 co-relation queries the response was YES. [2024-06-14 14:10:22,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51742 conditions, 6390 events. 3719/6390 cut-off events. For 1370648/1370648 co-relation queries the response was YES. Maximal size of possible extension queue 511. Compared 44925 event pairs, 936 based on Foata normal form. 1/6382 useless extension candidates. Maximal degree in co-relation 51523. Up to 5143 conditions per place. [2024-06-14 14:10:22,893 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 307 selfloop transitions, 270 changer transitions 0/584 dead transitions. [2024-06-14 14:10:22,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 507 places, 584 transitions, 11736 flow [2024-06-14 14:10:22,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:10:22,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:10:22,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 228 transitions. [2024-06-14 14:10:22,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5428571428571428 [2024-06-14 14:10:22,894 INFO L175 Difference]: Start difference. First operand has 498 places, 561 transitions, 9574 flow. Second operand 10 states and 228 transitions. [2024-06-14 14:10:22,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 507 places, 584 transitions, 11736 flow [2024-06-14 14:10:30,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 498 places, 584 transitions, 11202 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-14 14:10:30,996 INFO L231 Difference]: Finished difference. Result has 499 places, 564 transitions, 9633 flow [2024-06-14 14:10:30,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9046, PETRI_DIFFERENCE_MINUEND_PLACES=489, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=267, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9633, PETRI_PLACES=499, PETRI_TRANSITIONS=564} [2024-06-14 14:10:30,997 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 456 predicate places. [2024-06-14 14:10:30,997 INFO L495 AbstractCegarLoop]: Abstraction has has 499 places, 564 transitions, 9633 flow [2024-06-14 14:10:30,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:30,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:10:30,997 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:10:30,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2024-06-14 14:10:30,997 INFO L420 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:10:30,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:10:30,997 INFO L85 PathProgramCache]: Analyzing trace with hash 571273459, now seen corresponding path program 14 times [2024-06-14 14:10:30,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:10:30,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109029751] [2024-06-14 14:10:30,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:10:30,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:10:31,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:10:31,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:10:31,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:10:31,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109029751] [2024-06-14 14:10:31,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109029751] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:10:31,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:10:31,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:10:31,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232854730] [2024-06-14 14:10:31,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:10:31,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:10:31,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:10:31,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:10:31,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:10:31,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:10:31,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 499 places, 564 transitions, 9633 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:31,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:10:31,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:10:31,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:10:32,840 INFO L124 PetriNetUnfolderBase]: 3716/6386 cut-off events. [2024-06-14 14:10:32,841 INFO L125 PetriNetUnfolderBase]: For 1376083/1376083 co-relation queries the response was YES. [2024-06-14 14:10:32,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51689 conditions, 6386 events. 3716/6386 cut-off events. For 1376083/1376083 co-relation queries the response was YES. Maximal size of possible extension queue 511. Compared 44846 event pairs, 936 based on Foata normal form. 1/6378 useless extension candidates. Maximal degree in co-relation 51469. Up to 5140 conditions per place. [2024-06-14 14:10:32,943 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 299 selfloop transitions, 277 changer transitions 0/583 dead transitions. [2024-06-14 14:10:32,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 508 places, 583 transitions, 11445 flow [2024-06-14 14:10:32,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:10:32,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:10:32,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 228 transitions. [2024-06-14 14:10:32,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5428571428571428 [2024-06-14 14:10:32,944 INFO L175 Difference]: Start difference. First operand has 499 places, 564 transitions, 9633 flow. Second operand 10 states and 228 transitions. [2024-06-14 14:10:32,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 508 places, 583 transitions, 11445 flow [2024-06-14 14:10:40,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 500 places, 583 transitions, 10825 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-14 14:10:40,841 INFO L231 Difference]: Finished difference. Result has 501 places, 564 transitions, 9573 flow [2024-06-14 14:10:40,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9013, PETRI_DIFFERENCE_MINUEND_PLACES=491, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=564, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=277, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9573, PETRI_PLACES=501, PETRI_TRANSITIONS=564} [2024-06-14 14:10:40,841 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 458 predicate places. [2024-06-14 14:10:40,842 INFO L495 AbstractCegarLoop]: Abstraction has has 501 places, 564 transitions, 9573 flow [2024-06-14 14:10:40,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:40,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:10:40,842 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:10:40,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2024-06-14 14:10:40,842 INFO L420 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:10:40,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:10:40,842 INFO L85 PathProgramCache]: Analyzing trace with hash 576428449, now seen corresponding path program 15 times [2024-06-14 14:10:40,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:10:40,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125534492] [2024-06-14 14:10:40,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:10:40,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:10:40,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:10:41,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:10:41,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:10:41,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125534492] [2024-06-14 14:10:41,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125534492] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:10:41,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:10:41,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:10:41,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972850768] [2024-06-14 14:10:41,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:10:41,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:10:41,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:10:41,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:10:41,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:10:41,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:10:41,113 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 501 places, 564 transitions, 9573 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:41,113 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:10:41,113 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:10:41,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:10:42,754 INFO L124 PetriNetUnfolderBase]: 3713/6382 cut-off events. [2024-06-14 14:10:42,754 INFO L125 PetriNetUnfolderBase]: For 1380711/1380711 co-relation queries the response was YES. [2024-06-14 14:10:42,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51429 conditions, 6382 events. 3713/6382 cut-off events. For 1380711/1380711 co-relation queries the response was YES. Maximal size of possible extension queue 511. Compared 44833 event pairs, 936 based on Foata normal form. 1/6374 useless extension candidates. Maximal degree in co-relation 51209. Up to 5137 conditions per place. [2024-06-14 14:10:42,849 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 303 selfloop transitions, 272 changer transitions 0/582 dead transitions. [2024-06-14 14:10:42,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 510 places, 582 transitions, 11075 flow [2024-06-14 14:10:42,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:10:42,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:10:42,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 224 transitions. [2024-06-14 14:10:42,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2024-06-14 14:10:42,850 INFO L175 Difference]: Start difference. First operand has 501 places, 564 transitions, 9573 flow. Second operand 10 states and 224 transitions. [2024-06-14 14:10:42,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 510 places, 582 transitions, 11075 flow [2024-06-14 14:10:52,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 501 places, 582 transitions, 10573 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-14 14:10:52,565 INFO L231 Difference]: Finished difference. Result has 502 places, 564 transitions, 9621 flow [2024-06-14 14:10:52,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9071, PETRI_DIFFERENCE_MINUEND_PLACES=492, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=564, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=272, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9621, PETRI_PLACES=502, PETRI_TRANSITIONS=564} [2024-06-14 14:10:52,566 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 459 predicate places. [2024-06-14 14:10:52,566 INFO L495 AbstractCegarLoop]: Abstraction has has 502 places, 564 transitions, 9621 flow [2024-06-14 14:10:52,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:52,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:10:52,566 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:10:52,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2024-06-14 14:10:52,567 INFO L420 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:10:52,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:10:52,567 INFO L85 PathProgramCache]: Analyzing trace with hash 153846099, now seen corresponding path program 16 times [2024-06-14 14:10:52,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:10:52,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869956845] [2024-06-14 14:10:52,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:10:52,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:10:52,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:10:52,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:10:52,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:10:52,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869956845] [2024-06-14 14:10:52,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869956845] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:10:52,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:10:52,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:10:52,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536671461] [2024-06-14 14:10:52,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:10:52,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:10:52,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:10:52,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:10:52,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:10:52,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:10:52,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 502 places, 564 transitions, 9621 flow. Second operand has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:52,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:10:52,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:10:52,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:10:54,234 INFO L124 PetriNetUnfolderBase]: 3726/6424 cut-off events. [2024-06-14 14:10:54,234 INFO L125 PetriNetUnfolderBase]: For 1410588/1410588 co-relation queries the response was YES. [2024-06-14 14:10:54,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51829 conditions, 6424 events. 3726/6424 cut-off events. For 1410588/1410588 co-relation queries the response was YES. Maximal size of possible extension queue 515. Compared 45228 event pairs, 903 based on Foata normal form. 1/6422 useless extension candidates. Maximal degree in co-relation 51608. Up to 5417 conditions per place. [2024-06-14 14:10:54,341 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 437 selfloop transitions, 143 changer transitions 0/587 dead transitions. [2024-06-14 14:10:54,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 509 places, 587 transitions, 11547 flow [2024-06-14 14:10:54,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:10:54,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:10:54,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-14 14:10:54,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5535714285714286 [2024-06-14 14:10:54,342 INFO L175 Difference]: Start difference. First operand has 502 places, 564 transitions, 9621 flow. Second operand 8 states and 186 transitions. [2024-06-14 14:10:54,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 509 places, 587 transitions, 11547 flow [2024-06-14 14:11:03,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 499 places, 587 transitions, 10957 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-14 14:11:03,403 INFO L231 Difference]: Finished difference. Result has 500 places, 570 transitions, 9425 flow [2024-06-14 14:11:03,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9043, PETRI_DIFFERENCE_MINUEND_PLACES=492, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=564, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9425, PETRI_PLACES=500, PETRI_TRANSITIONS=570} [2024-06-14 14:11:03,403 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 457 predicate places. [2024-06-14 14:11:03,403 INFO L495 AbstractCegarLoop]: Abstraction has has 500 places, 570 transitions, 9425 flow [2024-06-14 14:11:03,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:03,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:11:03,404 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:11:03,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2024-06-14 14:11:03,404 INFO L420 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:11:03,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:11:03,405 INFO L85 PathProgramCache]: Analyzing trace with hash -74088237, now seen corresponding path program 17 times [2024-06-14 14:11:03,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:11:03,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995821447] [2024-06-14 14:11:03,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:11:03,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:11:03,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:11:03,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:11:03,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:11:03,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995821447] [2024-06-14 14:11:03,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995821447] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:11:03,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:11:03,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:11:03,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576444611] [2024-06-14 14:11:03,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:11:03,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:11:03,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:11:03,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:11:03,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:11:03,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:11:03,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 500 places, 570 transitions, 9425 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:03,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:11:03,701 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:11:03,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:11:05,086 INFO L124 PetriNetUnfolderBase]: 3731/6433 cut-off events. [2024-06-14 14:11:05,086 INFO L125 PetriNetUnfolderBase]: For 1425877/1425877 co-relation queries the response was YES. [2024-06-14 14:11:05,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51623 conditions, 6433 events. 3731/6433 cut-off events. For 1425877/1425877 co-relation queries the response was YES. Maximal size of possible extension queue 517. Compared 45355 event pairs, 903 based on Foata normal form. 1/6431 useless extension candidates. Maximal degree in co-relation 51401. Up to 5423 conditions per place. [2024-06-14 14:11:05,190 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 440 selfloop transitions, 143 changer transitions 0/590 dead transitions. [2024-06-14 14:11:05,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 508 places, 590 transitions, 10991 flow [2024-06-14 14:11:05,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:11:05,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:11:05,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 202 transitions. [2024-06-14 14:11:05,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5343915343915344 [2024-06-14 14:11:05,191 INFO L175 Difference]: Start difference. First operand has 500 places, 570 transitions, 9425 flow. Second operand 9 states and 202 transitions. [2024-06-14 14:11:05,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 508 places, 590 transitions, 10991 flow [2024-06-14 14:11:14,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 504 places, 590 transitions, 10748 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-14 14:11:14,124 INFO L231 Difference]: Finished difference. Result has 505 places, 573 transitions, 9520 flow [2024-06-14 14:11:14,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9185, PETRI_DIFFERENCE_MINUEND_PLACES=496, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=570, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9520, PETRI_PLACES=505, PETRI_TRANSITIONS=573} [2024-06-14 14:11:14,125 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 462 predicate places. [2024-06-14 14:11:14,125 INFO L495 AbstractCegarLoop]: Abstraction has has 505 places, 573 transitions, 9520 flow [2024-06-14 14:11:14,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:14,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:11:14,125 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:11:14,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175 [2024-06-14 14:11:14,125 INFO L420 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:11:14,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:11:14,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1923338877, now seen corresponding path program 18 times [2024-06-14 14:11:14,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:11:14,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680487838] [2024-06-14 14:11:14,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:11:14,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:11:14,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:11:14,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:11:14,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:11:14,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680487838] [2024-06-14 14:11:14,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680487838] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:11:14,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:11:14,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:11:14,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261224062] [2024-06-14 14:11:14,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:11:14,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:11:14,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:11:14,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:11:14,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:11:14,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:11:14,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 505 places, 573 transitions, 9520 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:14,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:11:14,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:11:14,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:11:15,879 INFO L124 PetriNetUnfolderBase]: 3736/6442 cut-off events. [2024-06-14 14:11:15,879 INFO L125 PetriNetUnfolderBase]: For 1443746/1443746 co-relation queries the response was YES. [2024-06-14 14:11:15,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51813 conditions, 6442 events. 3736/6442 cut-off events. For 1443746/1443746 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 45441 event pairs, 905 based on Foata normal form. 1/6440 useless extension candidates. Maximal degree in co-relation 51590. Up to 5429 conditions per place. [2024-06-14 14:11:15,985 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 445 selfloop transitions, 143 changer transitions 0/595 dead transitions. [2024-06-14 14:11:15,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 512 places, 595 transitions, 11107 flow [2024-06-14 14:11:15,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:11:15,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:11:15,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-14 14:11:15,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5595238095238095 [2024-06-14 14:11:15,987 INFO L175 Difference]: Start difference. First operand has 505 places, 573 transitions, 9520 flow. Second operand 8 states and 188 transitions. [2024-06-14 14:11:15,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 512 places, 595 transitions, 11107 flow [2024-06-14 14:11:25,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 506 places, 595 transitions, 10816 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-14 14:11:25,696 INFO L231 Difference]: Finished difference. Result has 507 places, 576 transitions, 9570 flow [2024-06-14 14:11:25,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9235, PETRI_DIFFERENCE_MINUEND_PLACES=499, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=573, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=433, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9570, PETRI_PLACES=507, PETRI_TRANSITIONS=576} [2024-06-14 14:11:25,696 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 464 predicate places. [2024-06-14 14:11:25,697 INFO L495 AbstractCegarLoop]: Abstraction has has 507 places, 576 transitions, 9570 flow [2024-06-14 14:11:25,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:25,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:11:25,697 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:11:25,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176 [2024-06-14 14:11:25,697 INFO L420 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:11:25,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:11:25,697 INFO L85 PathProgramCache]: Analyzing trace with hash -1928879817, now seen corresponding path program 19 times [2024-06-14 14:11:25,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:11:25,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736960927] [2024-06-14 14:11:25,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:11:25,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:11:25,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:11:25,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:11:25,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:11:25,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736960927] [2024-06-14 14:11:25,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736960927] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:11:25,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:11:25,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:11:25,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843109825] [2024-06-14 14:11:25,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:11:25,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:11:25,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:11:25,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:11:25,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:11:25,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:11:25,939 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 507 places, 576 transitions, 9570 flow. Second operand has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:25,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:11:25,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:11:25,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:11:27,445 INFO L124 PetriNetUnfolderBase]: 3741/6451 cut-off events. [2024-06-14 14:11:27,445 INFO L125 PetriNetUnfolderBase]: For 1461222/1461222 co-relation queries the response was YES. [2024-06-14 14:11:27,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51999 conditions, 6451 events. 3741/6451 cut-off events. For 1461222/1461222 co-relation queries the response was YES. Maximal size of possible extension queue 521. Compared 45526 event pairs, 905 based on Foata normal form. 1/6449 useless extension candidates. Maximal degree in co-relation 51775. Up to 5435 conditions per place. [2024-06-14 14:11:27,554 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 444 selfloop transitions, 150 changer transitions 0/601 dead transitions. [2024-06-14 14:11:27,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 513 places, 601 transitions, 11507 flow [2024-06-14 14:11:27,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:11:27,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:11:27,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-14 14:11:27,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5918367346938775 [2024-06-14 14:11:27,555 INFO L175 Difference]: Start difference. First operand has 507 places, 576 transitions, 9570 flow. Second operand 7 states and 174 transitions. [2024-06-14 14:11:27,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 513 places, 601 transitions, 11507 flow [2024-06-14 14:11:37,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 508 places, 601 transitions, 11307 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-14 14:11:37,052 INFO L231 Difference]: Finished difference. Result has 509 places, 579 transitions, 9738 flow [2024-06-14 14:11:37,052 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9373, PETRI_DIFFERENCE_MINUEND_PLACES=502, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=576, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=429, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9738, PETRI_PLACES=509, PETRI_TRANSITIONS=579} [2024-06-14 14:11:37,052 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 466 predicate places. [2024-06-14 14:11:37,053 INFO L495 AbstractCegarLoop]: Abstraction has has 509 places, 579 transitions, 9738 flow [2024-06-14 14:11:37,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:37,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:11:37,053 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:11:37,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177 [2024-06-14 14:11:37,053 INFO L420 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:11:37,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:11:37,054 INFO L85 PathProgramCache]: Analyzing trace with hash -273182637, now seen corresponding path program 20 times [2024-06-14 14:11:37,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:11:37,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589195830] [2024-06-14 14:11:37,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:11:37,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:11:37,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:11:37,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:11:37,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:11:37,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589195830] [2024-06-14 14:11:37,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589195830] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:11:37,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:11:37,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:11:37,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414329345] [2024-06-14 14:11:37,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:11:37,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:11:37,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:11:37,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:11:37,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:11:37,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:11:37,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 509 places, 579 transitions, 9738 flow. Second operand has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:37,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:11:37,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:11:37,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:11:38,866 INFO L124 PetriNetUnfolderBase]: 3738/6447 cut-off events. [2024-06-14 14:11:38,866 INFO L125 PetriNetUnfolderBase]: For 1468238/1468238 co-relation queries the response was YES. [2024-06-14 14:11:38,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52016 conditions, 6447 events. 3738/6447 cut-off events. For 1468238/1468238 co-relation queries the response was YES. Maximal size of possible extension queue 521. Compared 45443 event pairs, 905 based on Foata normal form. 1/6445 useless extension candidates. Maximal degree in co-relation 51791. Up to 5432 conditions per place. [2024-06-14 14:11:38,967 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 440 selfloop transitions, 151 changer transitions 0/598 dead transitions. [2024-06-14 14:11:38,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 515 places, 598 transitions, 11606 flow [2024-06-14 14:11:38,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:11:38,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:11:38,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-14 14:11:38,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5816326530612245 [2024-06-14 14:11:38,968 INFO L175 Difference]: Start difference. First operand has 509 places, 579 transitions, 9738 flow. Second operand 7 states and 171 transitions. [2024-06-14 14:11:38,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 515 places, 598 transitions, 11606 flow [2024-06-14 14:11:49,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 511 places, 598 transitions, 11379 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-14 14:11:49,727 INFO L231 Difference]: Finished difference. Result has 512 places, 579 transitions, 9819 flow [2024-06-14 14:11:49,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9511, PETRI_DIFFERENCE_MINUEND_PLACES=505, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=579, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9819, PETRI_PLACES=512, PETRI_TRANSITIONS=579} [2024-06-14 14:11:49,728 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 469 predicate places. [2024-06-14 14:11:49,728 INFO L495 AbstractCegarLoop]: Abstraction has has 512 places, 579 transitions, 9819 flow [2024-06-14 14:11:49,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:49,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:11:49,728 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:11:49,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178 [2024-06-14 14:11:49,728 INFO L420 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:11:49,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:11:49,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1935308907, now seen corresponding path program 21 times [2024-06-14 14:11:49,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:11:49,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623178569] [2024-06-14 14:11:49,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:11:49,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:11:49,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:11:49,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:11:49,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:11:49,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623178569] [2024-06-14 14:11:49,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623178569] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:11:49,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:11:49,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:11:49,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364511752] [2024-06-14 14:11:49,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:11:49,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:11:49,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:11:49,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:11:49,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:11:50,003 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:11:50,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 512 places, 579 transitions, 9819 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:50,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:11:50,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:11:50,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:11:51,609 INFO L124 PetriNetUnfolderBase]: 3735/6443 cut-off events. [2024-06-14 14:11:51,609 INFO L125 PetriNetUnfolderBase]: For 1474676/1474676 co-relation queries the response was YES. [2024-06-14 14:11:51,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51984 conditions, 6443 events. 3735/6443 cut-off events. For 1474676/1474676 co-relation queries the response was YES. Maximal size of possible extension queue 521. Compared 45447 event pairs, 905 based on Foata normal form. 1/6441 useless extension candidates. Maximal degree in co-relation 51759. Up to 5429 conditions per place. [2024-06-14 14:11:51,707 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 450 selfloop transitions, 147 changer transitions 0/604 dead transitions. [2024-06-14 14:11:51,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 519 places, 604 transitions, 11397 flow [2024-06-14 14:11:51,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:11:51,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:11:51,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-14 14:11:51,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-14 14:11:51,709 INFO L175 Difference]: Start difference. First operand has 512 places, 579 transitions, 9819 flow. Second operand 8 states and 196 transitions. [2024-06-14 14:11:51,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 519 places, 604 transitions, 11397 flow [2024-06-14 14:12:02,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 510 places, 604 transitions, 10663 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-14 14:12:02,306 INFO L231 Difference]: Finished difference. Result has 511 places, 579 transitions, 9387 flow [2024-06-14 14:12:02,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9085, PETRI_DIFFERENCE_MINUEND_PLACES=503, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=579, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9387, PETRI_PLACES=511, PETRI_TRANSITIONS=579} [2024-06-14 14:12:02,307 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 468 predicate places. [2024-06-14 14:12:02,307 INFO L495 AbstractCegarLoop]: Abstraction has has 511 places, 579 transitions, 9387 flow [2024-06-14 14:12:02,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:12:02,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:12:02,307 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:12:02,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179 [2024-06-14 14:12:02,308 INFO L420 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:12:02,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:12:02,308 INFO L85 PathProgramCache]: Analyzing trace with hash -223611281, now seen corresponding path program 22 times [2024-06-14 14:12:02,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:12:02,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209554461] [2024-06-14 14:12:02,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:12:02,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:12:02,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:12:02,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:12:02,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:12:02,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209554461] [2024-06-14 14:12:02,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209554461] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:12:02,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:12:02,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:12:02,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233957986] [2024-06-14 14:12:02,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:12:02,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:12:02,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:12:02,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:12:02,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:12:02,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:12:02,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 511 places, 579 transitions, 9387 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:12:02,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:12:02,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:12:02,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:12:04,248 INFO L124 PetriNetUnfolderBase]: 3732/6439 cut-off events. [2024-06-14 14:12:04,248 INFO L125 PetriNetUnfolderBase]: For 1471769/1471769 co-relation queries the response was YES. [2024-06-14 14:12:04,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51631 conditions, 6439 events. 3732/6439 cut-off events. For 1471769/1471769 co-relation queries the response was YES. Maximal size of possible extension queue 521. Compared 45439 event pairs, 905 based on Foata normal form. 1/6437 useless extension candidates. Maximal degree in co-relation 51405. Up to 5426 conditions per place. [2024-06-14 14:12:04,345 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 448 selfloop transitions, 150 changer transitions 0/605 dead transitions. [2024-06-14 14:12:04,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 520 places, 605 transitions, 10647 flow [2024-06-14 14:12:04,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:12:04,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:12:04,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 231 transitions. [2024-06-14 14:12:04,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-06-14 14:12:04,346 INFO L175 Difference]: Start difference. First operand has 511 places, 579 transitions, 9387 flow. Second operand 10 states and 231 transitions. [2024-06-14 14:12:04,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 520 places, 605 transitions, 10647 flow [2024-06-14 14:12:14,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 513 places, 605 transitions, 10291 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-14 14:12:14,507 INFO L231 Difference]: Finished difference. Result has 514 places, 579 transitions, 9337 flow [2024-06-14 14:12:14,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9031, PETRI_DIFFERENCE_MINUEND_PLACES=504, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=579, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=429, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9337, PETRI_PLACES=514, PETRI_TRANSITIONS=579} [2024-06-14 14:12:14,508 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 471 predicate places. [2024-06-14 14:12:14,508 INFO L495 AbstractCegarLoop]: Abstraction has has 514 places, 579 transitions, 9337 flow [2024-06-14 14:12:14,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:12:14,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:12:14,508 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:12:14,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180 [2024-06-14 14:12:14,508 INFO L420 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:12:14,508 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:12:14,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1406324778, now seen corresponding path program 9 times [2024-06-14 14:12:14,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:12:14,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088303541] [2024-06-14 14:12:14,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:12:14,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:12:14,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:12:14,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:12:14,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:12:14,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088303541] [2024-06-14 14:12:14,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088303541] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:12:14,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:12:14,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:12:14,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946479024] [2024-06-14 14:12:14,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:12:14,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:12:14,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:12:14,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:12:14,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:12:14,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:12:14,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 514 places, 579 transitions, 9337 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:12:14,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:12:14,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:12:14,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:12:16,874 INFO L124 PetriNetUnfolderBase]: 3786/6496 cut-off events. [2024-06-14 14:12:16,875 INFO L125 PetriNetUnfolderBase]: For 1620797/1620797 co-relation queries the response was YES. [2024-06-14 14:12:16,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54099 conditions, 6496 events. 3786/6496 cut-off events. For 1620797/1620797 co-relation queries the response was YES. Maximal size of possible extension queue 524. Compared 45741 event pairs, 941 based on Foata normal form. 2/6489 useless extension candidates. Maximal degree in co-relation 53872. Up to 5148 conditions per place. [2024-06-14 14:12:16,976 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 312 selfloop transitions, 298 changer transitions 0/617 dead transitions. [2024-06-14 14:12:16,977 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 525 places, 617 transitions, 11179 flow [2024-06-14 14:12:16,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 14:12:16,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 14:12:16,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 270 transitions. [2024-06-14 14:12:16,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2024-06-14 14:12:16,977 INFO L175 Difference]: Start difference. First operand has 514 places, 579 transitions, 9337 flow. Second operand 12 states and 270 transitions. [2024-06-14 14:12:16,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 525 places, 617 transitions, 11179 flow [2024-06-14 14:12:28,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 513 places, 617 transitions, 10689 flow, removed 0 selfloop flow, removed 12 redundant places. [2024-06-14 14:12:28,547 INFO L231 Difference]: Finished difference. Result has 514 places, 583 transitions, 9648 flow [2024-06-14 14:12:28,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8847, PETRI_DIFFERENCE_MINUEND_PLACES=502, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=579, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=296, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=9648, PETRI_PLACES=514, PETRI_TRANSITIONS=583} [2024-06-14 14:12:28,548 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 471 predicate places. [2024-06-14 14:12:28,548 INFO L495 AbstractCegarLoop]: Abstraction has has 514 places, 583 transitions, 9648 flow [2024-06-14 14:12:28,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:12:28,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:12:28,548 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:12:28,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181 [2024-06-14 14:12:28,548 INFO L420 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:12:28,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:12:28,548 INFO L85 PathProgramCache]: Analyzing trace with hash -19416826, now seen corresponding path program 10 times [2024-06-14 14:12:28,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:12:28,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253193330] [2024-06-14 14:12:28,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:12:28,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:12:28,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:12:28,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:12:28,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:12:28,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253193330] [2024-06-14 14:12:28,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253193330] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:12:28,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:12:28,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:12:28,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722875394] [2024-06-14 14:12:28,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:12:28,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:12:28,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:12:28,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:12:28,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:12:28,800 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:12:28,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 514 places, 583 transitions, 9648 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:12:28,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:12:28,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:12:28,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:12:30,965 INFO L124 PetriNetUnfolderBase]: 3794/6513 cut-off events. [2024-06-14 14:12:30,965 INFO L125 PetriNetUnfolderBase]: For 1640184/1640184 co-relation queries the response was YES. [2024-06-14 14:12:31,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54737 conditions, 6513 events. 3794/6513 cut-off events. For 1640184/1640184 co-relation queries the response was YES. Maximal size of possible extension queue 525. Compared 45840 event pairs, 948 based on Foata normal form. 2/6506 useless extension candidates. Maximal degree in co-relation 54509. Up to 5249 conditions per place. [2024-06-14 14:12:31,068 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 310 selfloop transitions, 294 changer transitions 0/611 dead transitions. [2024-06-14 14:12:31,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 525 places, 611 transitions, 11020 flow [2024-06-14 14:12:31,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 14:12:31,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 14:12:31,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 262 transitions. [2024-06-14 14:12:31,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5198412698412699 [2024-06-14 14:12:31,070 INFO L175 Difference]: Start difference. First operand has 514 places, 583 transitions, 9648 flow. Second operand 12 states and 262 transitions. [2024-06-14 14:12:31,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 525 places, 611 transitions, 11020 flow [2024-06-14 14:12:41,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 516 places, 611 transitions, 10288 flow, removed 74 selfloop flow, removed 9 redundant places. [2024-06-14 14:12:41,709 INFO L231 Difference]: Finished difference. Result has 517 places, 585 transitions, 9615 flow [2024-06-14 14:12:41,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8942, PETRI_DIFFERENCE_MINUEND_PLACES=505, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=583, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=292, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=9615, PETRI_PLACES=517, PETRI_TRANSITIONS=585} [2024-06-14 14:12:41,709 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 474 predicate places. [2024-06-14 14:12:41,709 INFO L495 AbstractCegarLoop]: Abstraction has has 517 places, 585 transitions, 9615 flow [2024-06-14 14:12:41,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:12:41,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:12:41,709 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:12:41,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182 [2024-06-14 14:12:41,710 INFO L420 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:12:41,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:12:41,710 INFO L85 PathProgramCache]: Analyzing trace with hash 79286230, now seen corresponding path program 11 times [2024-06-14 14:12:41,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:12:41,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086351752] [2024-06-14 14:12:41,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:12:41,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:12:41,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:12:41,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:12:41,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:12:41,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086351752] [2024-06-14 14:12:41,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086351752] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:12:41,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:12:41,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:12:41,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354484196] [2024-06-14 14:12:41,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:12:41,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:12:41,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:12:41,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:12:41,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:12:42,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:12:42,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 517 places, 585 transitions, 9615 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:12:42,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:12:42,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:12:42,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:12:43,989 INFO L124 PetriNetUnfolderBase]: 3802/6525 cut-off events. [2024-06-14 14:12:43,989 INFO L125 PetriNetUnfolderBase]: For 1654508/1654508 co-relation queries the response was YES. [2024-06-14 14:12:44,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54618 conditions, 6525 events. 3802/6525 cut-off events. For 1654508/1654508 co-relation queries the response was YES. Maximal size of possible extension queue 526. Compared 45943 event pairs, 948 based on Foata normal form. 2/6518 useless extension candidates. Maximal degree in co-relation 54389. Up to 5261 conditions per place. [2024-06-14 14:12:44,092 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 311 selfloop transitions, 291 changer transitions 0/609 dead transitions. [2024-06-14 14:12:44,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 527 places, 609 transitions, 10951 flow [2024-06-14 14:12:44,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:12:44,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:12:44,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 243 transitions. [2024-06-14 14:12:44,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.525974025974026 [2024-06-14 14:12:44,093 INFO L175 Difference]: Start difference. First operand has 517 places, 585 transitions, 9615 flow. Second operand 11 states and 243 transitions. [2024-06-14 14:12:44,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 527 places, 609 transitions, 10951 flow [2024-06-14 14:12:54,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 517 places, 609 transitions, 10298 flow, removed 34 selfloop flow, removed 10 redundant places. [2024-06-14 14:12:54,650 INFO L231 Difference]: Finished difference. Result has 518 places, 587 transitions, 9633 flow [2024-06-14 14:12:54,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8962, PETRI_DIFFERENCE_MINUEND_PLACES=507, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=585, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=289, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9633, PETRI_PLACES=518, PETRI_TRANSITIONS=587} [2024-06-14 14:12:54,651 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 475 predicate places. [2024-06-14 14:12:54,651 INFO L495 AbstractCegarLoop]: Abstraction has has 518 places, 587 transitions, 9633 flow [2024-06-14 14:12:54,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:12:54,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:12:54,651 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:12:54,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183 [2024-06-14 14:12:54,651 INFO L420 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:12:54,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:12:54,652 INFO L85 PathProgramCache]: Analyzing trace with hash 214087638, now seen corresponding path program 12 times [2024-06-14 14:12:54,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:12:54,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533068037] [2024-06-14 14:12:54,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:12:54,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:12:54,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:12:54,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:12:54,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:12:54,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533068037] [2024-06-14 14:12:54,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533068037] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:12:54,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:12:54,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:12:54,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006277780] [2024-06-14 14:12:54,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:12:54,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:12:54,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:12:54,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:12:54,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:12:54,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:12:54,925 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 518 places, 587 transitions, 9633 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:12:54,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:12:54,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:12:54,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:12:56,923 INFO L124 PetriNetUnfolderBase]: 3838/6581 cut-off events. [2024-06-14 14:12:56,923 INFO L125 PetriNetUnfolderBase]: For 1791933/1791933 co-relation queries the response was YES. [2024-06-14 14:12:57,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55390 conditions, 6581 events. 3838/6581 cut-off events. For 1791933/1791933 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 46316 event pairs, 952 based on Foata normal form. 10/6582 useless extension candidates. Maximal degree in co-relation 55160. Up to 5285 conditions per place. [2024-06-14 14:12:57,031 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 321 selfloop transitions, 282 changer transitions 0/610 dead transitions. [2024-06-14 14:12:57,031 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 527 places, 610 transitions, 10991 flow [2024-06-14 14:12:57,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:12:57,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:12:57,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 226 transitions. [2024-06-14 14:12:57,032 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5380952380952381 [2024-06-14 14:12:57,032 INFO L175 Difference]: Start difference. First operand has 518 places, 587 transitions, 9633 flow. Second operand 10 states and 226 transitions. [2024-06-14 14:12:57,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 527 places, 610 transitions, 10991 flow [2024-06-14 14:13:08,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 518 places, 610 transitions, 10340 flow, removed 36 selfloop flow, removed 9 redundant places. [2024-06-14 14:13:08,626 INFO L231 Difference]: Finished difference. Result has 519 places, 589 transitions, 9640 flow [2024-06-14 14:13:08,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8982, PETRI_DIFFERENCE_MINUEND_PLACES=509, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=587, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=280, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9640, PETRI_PLACES=519, PETRI_TRANSITIONS=589} [2024-06-14 14:13:08,626 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 476 predicate places. [2024-06-14 14:13:08,627 INFO L495 AbstractCegarLoop]: Abstraction has has 519 places, 589 transitions, 9640 flow [2024-06-14 14:13:08,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:13:08,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:13:08,627 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:13:08,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184 [2024-06-14 14:13:08,627 INFO L420 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:13:08,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:13:08,627 INFO L85 PathProgramCache]: Analyzing trace with hash 1526065110, now seen corresponding path program 13 times [2024-06-14 14:13:08,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:13:08,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060354515] [2024-06-14 14:13:08,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:13:08,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:13:08,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:13:08,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:13:08,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:13:08,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060354515] [2024-06-14 14:13:08,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060354515] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:13:08,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:13:08,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:13:08,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585075234] [2024-06-14 14:13:08,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:13:08,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:13:08,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:13:08,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:13:08,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:13:08,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:13:08,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 519 places, 589 transitions, 9640 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:13:08,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:13:08,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:13:08,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:13:10,808 INFO L124 PetriNetUnfolderBase]: 3815/6563 cut-off events. [2024-06-14 14:13:10,809 INFO L125 PetriNetUnfolderBase]: For 1670477/1670477 co-relation queries the response was YES. [2024-06-14 14:13:10,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53363 conditions, 6563 events. 3815/6563 cut-off events. For 1670477/1670477 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 46312 event pairs, 905 based on Foata normal form. 10/6570 useless extension candidates. Maximal degree in co-relation 53132. Up to 5499 conditions per place. [2024-06-14 14:13:10,933 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 464 selfloop transitions, 149 changer transitions 0/620 dead transitions. [2024-06-14 14:13:10,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 526 places, 620 transitions, 10962 flow [2024-06-14 14:13:10,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:13:10,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:13:10,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-14 14:13:10,934 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6011904761904762 [2024-06-14 14:13:10,934 INFO L175 Difference]: Start difference. First operand has 519 places, 589 transitions, 9640 flow. Second operand 8 states and 202 transitions. [2024-06-14 14:13:10,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 526 places, 620 transitions, 10962 flow [2024-06-14 14:13:19,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 518 places, 620 transitions, 10272 flow, removed 65 selfloop flow, removed 8 redundant places. [2024-06-14 14:13:19,176 INFO L231 Difference]: Finished difference. Result has 519 places, 589 transitions, 9257 flow [2024-06-14 14:13:19,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8950, PETRI_DIFFERENCE_MINUEND_PLACES=511, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=440, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9257, PETRI_PLACES=519, PETRI_TRANSITIONS=589} [2024-06-14 14:13:19,176 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 476 predicate places. [2024-06-14 14:13:19,177 INFO L495 AbstractCegarLoop]: Abstraction has has 519 places, 589 transitions, 9257 flow [2024-06-14 14:13:19,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:13:19,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:13:19,177 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:13:19,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185 [2024-06-14 14:13:19,177 INFO L420 AbstractCegarLoop]: === Iteration 187 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:13:19,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:13:19,177 INFO L85 PathProgramCache]: Analyzing trace with hash 614372131, now seen corresponding path program 1 times [2024-06-14 14:13:19,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:13:19,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122619876] [2024-06-14 14:13:19,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:13:19,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:13:19,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:13:19,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:13:19,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:13:19,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122619876] [2024-06-14 14:13:19,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122619876] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:13:19,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:13:19,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:13:19,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058771009] [2024-06-14 14:13:19,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:13:19,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:13:19,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:13:19,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:13:19,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:13:19,464 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:13:19,464 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 519 places, 589 transitions, 9257 flow. Second operand has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:13:19,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:13:19,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:13:19,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:13:21,424 INFO L124 PetriNetUnfolderBase]: 3835/6599 cut-off events. [2024-06-14 14:13:21,424 INFO L125 PetriNetUnfolderBase]: For 1615678/1615678 co-relation queries the response was YES. [2024-06-14 14:13:21,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52414 conditions, 6599 events. 3835/6599 cut-off events. For 1615678/1615678 co-relation queries the response was YES. Maximal size of possible extension queue 529. Compared 46590 event pairs, 912 based on Foata normal form. 6/6600 useless extension candidates. Maximal degree in co-relation 52182. Up to 5599 conditions per place. [2024-06-14 14:13:21,530 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 489 selfloop transitions, 120 changer transitions 0/616 dead transitions. [2024-06-14 14:13:21,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 530 places, 616 transitions, 10587 flow [2024-06-14 14:13:21,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 14:13:21,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 14:13:21,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 261 transitions. [2024-06-14 14:13:21,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5178571428571429 [2024-06-14 14:13:21,531 INFO L175 Difference]: Start difference. First operand has 519 places, 589 transitions, 9257 flow. Second operand 12 states and 261 transitions. [2024-06-14 14:13:21,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 530 places, 616 transitions, 10587 flow [2024-06-14 14:13:32,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 523 places, 616 transitions, 10267 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-14 14:13:32,644 INFO L231 Difference]: Finished difference. Result has 524 places, 590 transitions, 9211 flow [2024-06-14 14:13:32,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8937, PETRI_DIFFERENCE_MINUEND_PLACES=512, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=469, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=9211, PETRI_PLACES=524, PETRI_TRANSITIONS=590} [2024-06-14 14:13:32,644 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 481 predicate places. [2024-06-14 14:13:32,644 INFO L495 AbstractCegarLoop]: Abstraction has has 524 places, 590 transitions, 9211 flow [2024-06-14 14:13:32,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:13:32,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:13:32,645 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:13:32,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186 [2024-06-14 14:13:32,645 INFO L420 AbstractCegarLoop]: === Iteration 188 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:13:32,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:13:32,645 INFO L85 PathProgramCache]: Analyzing trace with hash 1084938913, now seen corresponding path program 2 times [2024-06-14 14:13:32,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:13:32,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695131912] [2024-06-14 14:13:32,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:13:32,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:13:32,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:13:32,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:13:32,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:13:32,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695131912] [2024-06-14 14:13:32,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695131912] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:13:32,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:13:32,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:13:32,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433230300] [2024-06-14 14:13:32,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:13:32,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:13:32,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:13:32,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:13:32,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:13:32,939 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:13:32,939 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 524 places, 590 transitions, 9211 flow. Second operand has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:13:32,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:13:32,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:13:32,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:13:34,809 INFO L124 PetriNetUnfolderBase]: 3855/6643 cut-off events. [2024-06-14 14:13:34,809 INFO L125 PetriNetUnfolderBase]: For 1633281/1633281 co-relation queries the response was YES. [2024-06-14 14:13:34,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52653 conditions, 6643 events. 3855/6643 cut-off events. For 1633281/1633281 co-relation queries the response was YES. Maximal size of possible extension queue 530. Compared 46922 event pairs, 885 based on Foata normal form. 6/6644 useless extension candidates. Maximal degree in co-relation 52420. Up to 5204 conditions per place. [2024-06-14 14:13:34,922 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 486 selfloop transitions, 128 changer transitions 0/621 dead transitions. [2024-06-14 14:13:34,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 534 places, 621 transitions, 10917 flow [2024-06-14 14:13:34,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:13:34,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:13:34,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 247 transitions. [2024-06-14 14:13:34,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5346320346320347 [2024-06-14 14:13:34,923 INFO L175 Difference]: Start difference. First operand has 524 places, 590 transitions, 9211 flow. Second operand 11 states and 247 transitions. [2024-06-14 14:13:34,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 534 places, 621 transitions, 10917 flow [2024-06-14 14:13:45,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 524 places, 621 transitions, 10653 flow, removed 13 selfloop flow, removed 10 redundant places. [2024-06-14 14:13:45,428 INFO L231 Difference]: Finished difference. Result has 525 places, 591 transitions, 9237 flow [2024-06-14 14:13:45,428 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8947, PETRI_DIFFERENCE_MINUEND_PLACES=514, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=590, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=463, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9237, PETRI_PLACES=525, PETRI_TRANSITIONS=591} [2024-06-14 14:13:45,428 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 482 predicate places. [2024-06-14 14:13:45,428 INFO L495 AbstractCegarLoop]: Abstraction has has 525 places, 591 transitions, 9237 flow [2024-06-14 14:13:45,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:13:45,428 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:13:45,429 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:13:45,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187 [2024-06-14 14:13:45,429 INFO L420 AbstractCegarLoop]: === Iteration 189 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:13:45,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:13:45,429 INFO L85 PathProgramCache]: Analyzing trace with hash 1085205823, now seen corresponding path program 3 times [2024-06-14 14:13:45,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:13:45,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402574500] [2024-06-14 14:13:45,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:13:45,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:13:45,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:13:45,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:13:45,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:13:45,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402574500] [2024-06-14 14:13:45,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402574500] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:13:45,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:13:45,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:13:45,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188573569] [2024-06-14 14:13:45,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:13:45,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:13:45,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:13:45,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:13:45,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:13:45,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:13:45,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 525 places, 591 transitions, 9237 flow. Second operand has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:13:45,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:13:45,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:13:45,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:13:47,600 INFO L124 PetriNetUnfolderBase]: 3842/6624 cut-off events. [2024-06-14 14:13:47,600 INFO L125 PetriNetUnfolderBase]: For 1564947/1564947 co-relation queries the response was YES. [2024-06-14 14:13:47,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51628 conditions, 6624 events. 3842/6624 cut-off events. For 1564947/1564947 co-relation queries the response was YES. Maximal size of possible extension queue 530. Compared 46807 event pairs, 887 based on Foata normal form. 6/6625 useless extension candidates. Maximal degree in co-relation 51394. Up to 5198 conditions per place. [2024-06-14 14:13:47,707 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 488 selfloop transitions, 124 changer transitions 0/619 dead transitions. [2024-06-14 14:13:47,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 535 places, 619 transitions, 10557 flow [2024-06-14 14:13:47,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:13:47,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:13:47,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 244 transitions. [2024-06-14 14:13:47,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5281385281385281 [2024-06-14 14:13:47,708 INFO L175 Difference]: Start difference. First operand has 525 places, 591 transitions, 9237 flow. Second operand 11 states and 244 transitions. [2024-06-14 14:13:47,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 535 places, 619 transitions, 10557 flow [2024-06-14 14:13:58,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 527 places, 619 transitions, 10264 flow, removed 25 selfloop flow, removed 8 redundant places. [2024-06-14 14:13:58,759 INFO L231 Difference]: Finished difference. Result has 528 places, 591 transitions, 9196 flow [2024-06-14 14:13:58,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8944, PETRI_DIFFERENCE_MINUEND_PLACES=517, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=591, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=467, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9196, PETRI_PLACES=528, PETRI_TRANSITIONS=591} [2024-06-14 14:13:58,759 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 485 predicate places. [2024-06-14 14:13:58,759 INFO L495 AbstractCegarLoop]: Abstraction has has 528 places, 591 transitions, 9196 flow [2024-06-14 14:13:58,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:13:58,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:13:58,759 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:13:58,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188 [2024-06-14 14:13:58,760 INFO L420 AbstractCegarLoop]: === Iteration 190 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:13:58,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:13:58,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1308080949, now seen corresponding path program 4 times [2024-06-14 14:13:58,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:13:58,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190403670] [2024-06-14 14:13:58,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:13:58,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:13:58,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:13:58,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:13:58,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:13:58,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190403670] [2024-06-14 14:13:58,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190403670] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:13:58,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:13:58,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:13:58,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383738617] [2024-06-14 14:13:58,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:13:58,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:13:58,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:13:58,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:13:58,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:13:59,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:13:59,041 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 528 places, 591 transitions, 9196 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:13:59,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:13:59,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:13:59,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:14:00,964 INFO L124 PetriNetUnfolderBase]: 3829/6613 cut-off events. [2024-06-14 14:14:00,964 INFO L125 PetriNetUnfolderBase]: For 1492663/1492663 co-relation queries the response was YES. [2024-06-14 14:14:01,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50309 conditions, 6613 events. 3829/6613 cut-off events. For 1492663/1492663 co-relation queries the response was YES. Maximal size of possible extension queue 530. Compared 46901 event pairs, 611 based on Foata normal form. 6/6615 useless extension candidates. Maximal degree in co-relation 50074. Up to 4866 conditions per place. [2024-06-14 14:14:01,068 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 505 selfloop transitions, 120 changer transitions 1/633 dead transitions. [2024-06-14 14:14:01,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 535 places, 633 transitions, 10623 flow [2024-06-14 14:14:01,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:14:01,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:14:01,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 211 transitions. [2024-06-14 14:14:01,069 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6279761904761905 [2024-06-14 14:14:01,069 INFO L175 Difference]: Start difference. First operand has 528 places, 591 transitions, 9196 flow. Second operand 8 states and 211 transitions. [2024-06-14 14:14:01,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 535 places, 633 transitions, 10623 flow [2024-06-14 14:14:08,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 525 places, 633 transitions, 10336 flow, removed 15 selfloop flow, removed 10 redundant places. [2024-06-14 14:14:08,912 INFO L231 Difference]: Finished difference. Result has 526 places, 592 transitions, 9192 flow [2024-06-14 14:14:08,912 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8921, PETRI_DIFFERENCE_MINUEND_PLACES=518, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=591, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=472, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9192, PETRI_PLACES=526, PETRI_TRANSITIONS=592} [2024-06-14 14:14:08,913 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 483 predicate places. [2024-06-14 14:14:08,913 INFO L495 AbstractCegarLoop]: Abstraction has has 526 places, 592 transitions, 9192 flow [2024-06-14 14:14:08,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:14:08,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:14:08,913 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:14:08,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable189 [2024-06-14 14:14:08,913 INFO L420 AbstractCegarLoop]: === Iteration 191 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:14:08,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:14:08,914 INFO L85 PathProgramCache]: Analyzing trace with hash -1244611325, now seen corresponding path program 5 times [2024-06-14 14:14:08,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:14:08,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959793254] [2024-06-14 14:14:08,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:14:08,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:14:08,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:14:09,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:14:09,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:14:09,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959793254] [2024-06-14 14:14:09,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959793254] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:14:09,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:14:09,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:14:09,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916503443] [2024-06-14 14:14:09,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:14:09,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:14:09,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:14:09,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:14:09,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:14:09,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:14:09,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 526 places, 592 transitions, 9192 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:14:09,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:14:09,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:14:09,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:14:11,095 INFO L124 PetriNetUnfolderBase]: 3849/6660 cut-off events. [2024-06-14 14:14:11,095 INFO L125 PetriNetUnfolderBase]: For 1510729/1510729 co-relation queries the response was YES. [2024-06-14 14:14:11,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50582 conditions, 6660 events. 3849/6660 cut-off events. For 1510729/1510729 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 47348 event pairs, 551 based on Foata normal form. 6/6663 useless extension candidates. Maximal degree in co-relation 50346. Up to 4045 conditions per place. [2024-06-14 14:14:11,204 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 505 selfloop transitions, 118 changer transitions 0/630 dead transitions. [2024-06-14 14:14:11,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 532 places, 630 transitions, 11322 flow [2024-06-14 14:14:11,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:14:11,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:14:11,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 185 transitions. [2024-06-14 14:14:11,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6292517006802721 [2024-06-14 14:14:11,205 INFO L175 Difference]: Start difference. First operand has 526 places, 592 transitions, 9192 flow. Second operand 7 states and 185 transitions. [2024-06-14 14:14:11,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 532 places, 630 transitions, 11322 flow [2024-06-14 14:14:21,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 526 places, 630 transitions, 11121 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-14 14:14:21,727 INFO L231 Difference]: Finished difference. Result has 527 places, 594 transitions, 9295 flow [2024-06-14 14:14:21,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8995, PETRI_DIFFERENCE_MINUEND_PLACES=520, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=592, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=476, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9295, PETRI_PLACES=527, PETRI_TRANSITIONS=594} [2024-06-14 14:14:21,728 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 484 predicate places. [2024-06-14 14:14:21,728 INFO L495 AbstractCegarLoop]: Abstraction has has 527 places, 594 transitions, 9295 flow [2024-06-14 14:14:21,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:14:21,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:14:21,728 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:14:21,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190 [2024-06-14 14:14:21,729 INFO L420 AbstractCegarLoop]: === Iteration 192 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:14:21,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:14:21,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1244878235, now seen corresponding path program 6 times [2024-06-14 14:14:21,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:14:21,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599473083] [2024-06-14 14:14:21,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:14:21,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:14:21,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:14:22,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:14:22,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:14:22,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599473083] [2024-06-14 14:14:22,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599473083] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:14:22,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:14:22,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:14:22,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896443317] [2024-06-14 14:14:22,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:14:22,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:14:22,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:14:22,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:14:22,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:14:22,052 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:14:22,053 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 527 places, 594 transitions, 9295 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:14:22,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:14:22,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:14:22,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:14:23,958 INFO L124 PetriNetUnfolderBase]: 3836/6625 cut-off events. [2024-06-14 14:14:23,958 INFO L125 PetriNetUnfolderBase]: For 1428431/1428431 co-relation queries the response was YES. [2024-06-14 14:14:24,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49578 conditions, 6625 events. 3836/6625 cut-off events. For 1428431/1428431 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 46971 event pairs, 647 based on Foata normal form. 6/6628 useless extension candidates. Maximal degree in co-relation 49342. Up to 4039 conditions per place. [2024-06-14 14:14:24,065 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 503 selfloop transitions, 118 changer transitions 0/628 dead transitions. [2024-06-14 14:14:24,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 533 places, 628 transitions, 11013 flow [2024-06-14 14:14:24,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:14:24,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:14:24,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-14 14:14:24,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6258503401360545 [2024-06-14 14:14:24,067 INFO L175 Difference]: Start difference. First operand has 527 places, 594 transitions, 9295 flow. Second operand 7 states and 184 transitions. [2024-06-14 14:14:24,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 533 places, 628 transitions, 11013 flow [2024-06-14 14:14:33,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 530 places, 628 transitions, 10816 flow, removed 29 selfloop flow, removed 3 redundant places. [2024-06-14 14:14:33,301 INFO L231 Difference]: Finished difference. Result has 531 places, 594 transitions, 9340 flow [2024-06-14 14:14:33,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9098, PETRI_DIFFERENCE_MINUEND_PLACES=524, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=594, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=476, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9340, PETRI_PLACES=531, PETRI_TRANSITIONS=594} [2024-06-14 14:14:33,301 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 488 predicate places. [2024-06-14 14:14:33,301 INFO L495 AbstractCegarLoop]: Abstraction has has 531 places, 594 transitions, 9340 flow [2024-06-14 14:14:33,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:14:33,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:14:33,302 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:14:33,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191 [2024-06-14 14:14:33,302 INFO L420 AbstractCegarLoop]: === Iteration 193 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:14:33,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:14:33,302 INFO L85 PathProgramCache]: Analyzing trace with hash 856789001, now seen corresponding path program 1 times [2024-06-14 14:14:33,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:14:33,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725073054] [2024-06-14 14:14:33,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:14:33,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:14:33,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:14:33,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:14:33,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:14:33,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725073054] [2024-06-14 14:14:33,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725073054] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:14:33,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:14:33,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:14:33,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890732166] [2024-06-14 14:14:33,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:14:33,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:14:33,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:14:33,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:14:33,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:14:33,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:14:33,621 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 531 places, 594 transitions, 9340 flow. Second operand has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:14:33,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:14:33,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:14:33,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:14:35,677 INFO L124 PetriNetUnfolderBase]: 3889/6717 cut-off events. [2024-06-14 14:14:35,677 INFO L125 PetriNetUnfolderBase]: For 1534915/1534915 co-relation queries the response was YES. [2024-06-14 14:14:35,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51249 conditions, 6717 events. 3889/6717 cut-off events. For 1534915/1534915 co-relation queries the response was YES. Maximal size of possible extension queue 535. Compared 47722 event pairs, 647 based on Foata normal form. 6/6719 useless extension candidates. Maximal degree in co-relation 51012. Up to 5098 conditions per place. [2024-06-14 14:14:35,794 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 576 selfloop transitions, 60 changer transitions 4/647 dead transitions. [2024-06-14 14:14:35,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 540 places, 647 transitions, 11542 flow [2024-06-14 14:14:35,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:14:35,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:14:35,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 244 transitions. [2024-06-14 14:14:35,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.580952380952381 [2024-06-14 14:14:35,796 INFO L175 Difference]: Start difference. First operand has 531 places, 594 transitions, 9340 flow. Second operand 10 states and 244 transitions. [2024-06-14 14:14:35,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 540 places, 647 transitions, 11542 flow Killed by 15