./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe014_pso.oepc_pso.opt_tso.oepc_tso.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2024-05-07_14-17-48.files/mutex-meet/safe014_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b44c8288 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe014_pso.oepc_pso.opt_tso.oepc_tso.opt.i ./goblint.2024-05-07_14-17-48.files/mutex-meet/safe014_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-wip.fs.witness-ghost-b44c828-m [2024-05-12 10:36:09,025 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-05-12 10:36:09,074 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-05-12 10:36:09,077 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-05-12 10:36:09,077 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-05-12 10:36:09,092 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-05-12 10:36:09,095 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-05-12 10:36:09,096 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-05-12 10:36:09,097 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-05-12 10:36:09,098 INFO L153 SettingsManager]: * Use memory slicer=true [2024-05-12 10:36:09,098 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-05-12 10:36:09,099 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-05-12 10:36:09,099 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-05-12 10:36:09,102 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-05-12 10:36:09,102 INFO L153 SettingsManager]: * Use SBE=true [2024-05-12 10:36:09,103 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-05-12 10:36:09,103 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-05-12 10:36:09,103 INFO L153 SettingsManager]: * sizeof long=4 [2024-05-12 10:36:09,103 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-05-12 10:36:09,104 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-05-12 10:36:09,104 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-05-12 10:36:09,104 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-05-12 10:36:09,104 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-05-12 10:36:09,105 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-05-12 10:36:09,105 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-05-12 10:36:09,105 INFO L153 SettingsManager]: * sizeof long double=12 [2024-05-12 10:36:09,105 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-05-12 10:36:09,105 INFO L153 SettingsManager]: * Use constant arrays=true [2024-05-12 10:36:09,106 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-05-12 10:36:09,106 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-05-12 10:36:09,107 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-05-12 10:36:09,107 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-05-12 10:36:09,107 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-05-12 10:36:09,108 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-05-12 10:36:09,108 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-05-12 10:36:09,108 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-05-12 10:36:09,108 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-05-12 10:36:09,108 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-05-12 10:36:09,108 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-05-12 10:36:09,109 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-05-12 10:36:09,109 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-05-12 10:36:09,109 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-05-12 10:36:09,109 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-05-12 10:36:09,109 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-05-12 10:36:09,342 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-05-12 10:36:09,364 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-05-12 10:36:09,366 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-05-12 10:36:09,366 INFO L270 PluginConnector]: Initializing CDTParser... [2024-05-12 10:36:09,367 INFO L274 PluginConnector]: CDTParser initialized [2024-05-12 10:36:09,368 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe014_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-05-12 10:36:10,450 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-05-12 10:36:10,676 INFO L384 CDTParser]: Found 1 translation units. [2024-05-12 10:36:10,676 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe014_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-05-12 10:36:10,686 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/68fff42e4/cc0b36ee1b9c481ab45709eb99c8ef83/FLAG58a087ef1 [2024-05-12 10:36:10,695 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/68fff42e4/cc0b36ee1b9c481ab45709eb99c8ef83 [2024-05-12 10:36:10,697 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-05-12 10:36:10,698 INFO L274 PluginConnector]: Witness Parser initialized [2024-05-12 10:36:10,698 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-07_14-17-48.files/mutex-meet/safe014_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml [2024-05-12 10:36:10,824 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-05-12 10:36:10,825 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-05-12 10:36:10,826 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-05-12 10:36:10,826 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-05-12 10:36:10,829 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-05-12 10:36:10,830 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.05 10:36:10" (1/2) ... [2024-05-12 10:36:10,830 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47ebb192 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 10:36:10, skipping insertion in model container [2024-05-12 10:36:10,831 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.05 10:36:10" (1/2) ... [2024-05-12 10:36:10,832 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@41f91418 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.05 10:36:10, skipping insertion in model container [2024-05-12 10:36:10,832 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 10:36:10" (2/2) ... [2024-05-12 10:36:10,835 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47ebb192 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:36:10, skipping insertion in model container [2024-05-12 10:36:10,835 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 10:36:10" (2/2) ... [2024-05-12 10:36:10,835 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-05-12 10:36:10,879 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-05-12 10:36:10,879 INFO L97 edCorrectnessWitness]: Location invariant before [L783-L783] (((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || (((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 2) && __unbuffered_p0_EBX <= 127) && ((__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1) || __unbuffered_p0_EBX == 2)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! 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 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || (((((((((((((((((((((long long )__unbuffered_cnt + (long long )__unbuffered_p0_EAX >= 0LL && (long long )__unbuffered_cnt + (long long )__unbuffered_p0_EBX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p0_EBX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$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))) && (! multithreaded || ((((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p0_EBX) && 0 <= __unbuffered_p2_EAX) && 0 <= x) && 0 <= y) && __unbuffered_p0_EAX <= 1) && __unbuffered_p0_EBX <= 127) && __unbuffered_p2_EAX <= 127) && y <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (y == 0 || y == 1)) && ((__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1) || __unbuffered_p0_EBX == 2)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2))) [2024-05-12 10:36:10,880 INFO L97 edCorrectnessWitness]: Location invariant before [L784-L784] (((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || (((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 2) && __unbuffered_p0_EBX <= 127) && ((__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1) || __unbuffered_p0_EBX == 2)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! 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 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || (((((((((((((((((((((long long )__unbuffered_cnt + (long long )__unbuffered_p0_EAX >= 0LL && (long long )__unbuffered_cnt + (long long )__unbuffered_p0_EBX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p0_EBX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$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))) && (! multithreaded || ((((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p0_EBX) && 0 <= __unbuffered_p2_EAX) && 0 <= x) && 0 <= y) && __unbuffered_p0_EAX <= 1) && __unbuffered_p0_EBX <= 127) && __unbuffered_p2_EAX <= 127) && y <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (y == 0 || y == 1)) && ((__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1) || __unbuffered_p0_EBX == 2)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2))) [2024-05-12 10:36:10,880 INFO L97 edCorrectnessWitness]: Location invariant before [L781-L781] (((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || (((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 2) && __unbuffered_p0_EBX <= 127) && ((__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1) || __unbuffered_p0_EBX == 2)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! 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 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || (((((((((((((((((((((long long )__unbuffered_cnt + (long long )__unbuffered_p0_EAX >= 0LL && (long long )__unbuffered_cnt + (long long )__unbuffered_p0_EBX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p0_EBX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$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))) && (! multithreaded || ((((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p0_EBX) && 0 <= __unbuffered_p2_EAX) && 0 <= x) && 0 <= y) && __unbuffered_p0_EAX <= 1) && __unbuffered_p0_EBX <= 127) && __unbuffered_p2_EAX <= 127) && y <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (y == 0 || y == 1)) && ((__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1) || __unbuffered_p0_EBX == 2)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2))) [2024-05-12 10:36:10,880 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-05-12 10:36:10,880 INFO L106 edCorrectnessWitness]: ghost_update [L779-L779] multithreaded = 1; [2024-05-12 10:36:10,918 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-05-12 10:36:11,067 WARN L246 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe014_pso.oepc_pso.opt_tso.oepc_tso.opt.i[975,988] [2024-05-12 10:36:11,211 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-05-12 10:36:11,218 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local [2024-05-12 10:36:11,253 WARN L246 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe014_pso.oepc_pso.opt_tso.oepc_tso.opt.i[975,988] Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-05-12 10:36:11,335 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-05-12 10:36:11,368 INFO L206 MainTranslator]: Completed translation [2024-05-12 10:36:11,369 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:36:11 WrapperNode [2024-05-12 10:36:11,370 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-05-12 10:36:11,371 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-05-12 10:36:11,371 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-05-12 10:36:11,371 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-05-12 10:36:11,376 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:36:11" (1/1) ... [2024-05-12 10:36:11,402 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:36:11" (1/1) ... [2024-05-12 10:36:11,433 INFO L138 Inliner]: procedures = 176, calls = 53, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 76 [2024-05-12 10:36:11,434 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-05-12 10:36:11,434 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-05-12 10:36:11,435 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-05-12 10:36:11,435 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-05-12 10:36:11,443 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:36:11" (1/1) ... [2024-05-12 10:36:11,444 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:36:11" (1/1) ... [2024-05-12 10:36:11,457 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:36:11" (1/1) ... [2024-05-12 10:36:11,500 INFO L175 MemorySlicer]: Split 5 memory accesses to 4 slices as follows [2, 1, 1, 1]. 40 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 3 writes are split as follows [0, 1, 1, 1]. [2024-05-12 10:36:11,500 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:36:11" (1/1) ... [2024-05-12 10:36:11,501 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:36:11" (1/1) ... [2024-05-12 10:36:11,509 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:36:11" (1/1) ... [2024-05-12 10:36:11,513 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:36:11" (1/1) ... [2024-05-12 10:36:11,516 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:36:11" (1/1) ... [2024-05-12 10:36:11,535 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:36:11" (1/1) ... [2024-05-12 10:36:11,538 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-05-12 10:36:11,542 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-05-12 10:36:11,543 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-05-12 10:36:11,543 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-05-12 10:36:11,543 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:36:11" (1/1) ... [2024-05-12 10:36:11,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-05-12 10:36:11,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-05-12 10:36:11,577 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-05-12 10:36:11,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-05-12 10:36:11,606 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-05-12 10:36:11,606 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-05-12 10:36:11,606 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-05-12 10:36:11,607 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-05-12 10:36:11,607 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-05-12 10:36:11,607 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-05-12 10:36:11,607 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-05-12 10:36:11,607 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-05-12 10:36:11,608 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-05-12 10:36:11,608 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-05-12 10:36:11,608 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-05-12 10:36:11,608 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-05-12 10:36:11,609 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-05-12 10:36:11,609 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-05-12 10:36:11,609 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-05-12 10:36:11,610 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-05-12 10:36:11,610 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-05-12 10:36:11,610 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-05-12 10:36:11,610 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-05-12 10:36:11,610 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-05-12 10:36:11,610 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-05-12 10:36:11,611 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-05-12 10:36:11,712 INFO L244 CfgBuilder]: Building ICFG [2024-05-12 10:36:11,713 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-05-12 10:36:11,953 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-05-12 10:36:11,953 INFO L293 CfgBuilder]: Performing block encoding [2024-05-12 10:36:12,041 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-05-12 10:36:12,043 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-05-12 10:36:12,044 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.05 10:36:12 BoogieIcfgContainer [2024-05-12 10:36:12,044 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-05-12 10:36:12,045 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-05-12 10:36:12,046 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-05-12 10:36:12,049 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-05-12 10:36:12,049 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.05 10:36:10" (1/4) ... [2024-05-12 10:36:12,049 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@154ca5a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.05 10:36:12, skipping insertion in model container [2024-05-12 10:36:12,049 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 12.05 10:36:10" (2/4) ... [2024-05-12 10:36:12,049 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@154ca5a8 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 12.05 10:36:12, skipping insertion in model container [2024-05-12 10:36:12,050 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 12.05 10:36:11" (3/4) ... [2024-05-12 10:36:12,050 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@154ca5a8 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 12.05 10:36:12, skipping insertion in model container [2024-05-12 10:36:12,051 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.05 10:36:12" (4/4) ... [2024-05-12 10:36:12,051 INFO L112 eAbstractionObserver]: Analyzing ICFG safe014_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-05-12 10:36:12,064 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-05-12 10:36:12,064 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-05-12 10:36:12,064 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-05-12 10:36:12,116 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-05-12 10:36:12,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 55 places, 46 transitions, 104 flow [2024-05-12 10:36:12,176 INFO L124 PetriNetUnfolderBase]: 1/43 cut-off events. [2024-05-12 10:36:12,176 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-05-12 10:36:12,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53 conditions, 43 events. 1/43 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 65 event pairs, 0 based on Foata normal form. 0/38 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2024-05-12 10:36:12,179 INFO L82 GeneralOperation]: Start removeDead. Operand has 55 places, 46 transitions, 104 flow [2024-05-12 10:36:12,183 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 50 places, 40 transitions, 89 flow [2024-05-12 10:36:12,191 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-05-12 10:36:12,195 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;@7650263c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-05-12 10:36:12,195 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-05-12 10:36:12,201 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-05-12 10:36:12,202 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-05-12 10:36:12,202 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-05-12 10:36:12,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:12,203 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-05-12 10:36:12,203 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:36:12,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:12,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1708197830, now seen corresponding path program 1 times [2024-05-12 10:36:12,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:12,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010077887] [2024-05-12 10:36:12,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:12,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:12,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:12,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:36:12,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:12,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010077887] [2024-05-12 10:36:12,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010077887] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:12,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:12,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-05-12 10:36:12,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710271880] [2024-05-12 10:36:12,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:12,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-05-12 10:36:12,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:12,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-05-12 10:36:12,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-05-12 10:36:12,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 46 [2024-05-12 10:36:12,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 40 transitions, 89 flow. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:12,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:12,862 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 46 [2024-05-12 10:36:12,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:13,072 INFO L124 PetriNetUnfolderBase]: 696/1147 cut-off events. [2024-05-12 10:36:13,073 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-05-12 10:36:13,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2258 conditions, 1147 events. 696/1147 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 6296 event pairs, 393 based on Foata normal form. 1/1099 useless extension candidates. Maximal degree in co-relation 2243. Up to 1056 conditions per place. [2024-05-12 10:36:13,084 INFO L140 encePairwiseOnDemand]: 39/46 looper letters, 33 selfloop transitions, 4 changer transitions 0/52 dead transitions. [2024-05-12 10:36:13,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 52 transitions, 193 flow [2024-05-12 10:36:13,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-05-12 10:36:13,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-05-12 10:36:13,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 97 transitions. [2024-05-12 10:36:13,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7028985507246377 [2024-05-12 10:36:13,097 INFO L175 Difference]: Start difference. First operand has 50 places, 40 transitions, 89 flow. Second operand 3 states and 97 transitions. [2024-05-12 10:36:13,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 52 transitions, 193 flow [2024-05-12 10:36:13,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 52 transitions, 188 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-05-12 10:36:13,102 INFO L231 Difference]: Finished difference. Result has 50 places, 43 transitions, 116 flow [2024-05-12 10:36:13,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=116, PETRI_PLACES=50, PETRI_TRANSITIONS=43} [2024-05-12 10:36:13,106 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 0 predicate places. [2024-05-12 10:36:13,107 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 116 flow [2024-05-12 10:36:13,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:13,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:13,108 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:36:13,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-05-12 10:36:13,108 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:36:13,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:13,109 INFO L85 PathProgramCache]: Analyzing trace with hash 1917789224, now seen corresponding path program 1 times [2024-05-12 10:36:13,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:13,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259651803] [2024-05-12 10:36:13,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:13,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:13,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:13,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:36:13,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:13,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259651803] [2024-05-12 10:36:13,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259651803] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:13,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:13,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:36:13,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982634041] [2024-05-12 10:36:13,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:13,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:36:13,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:13,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:36:13,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:36:13,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 10:36:13,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 116 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:13,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:13,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 10:36:13,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:13,761 INFO L124 PetriNetUnfolderBase]: 1225/1962 cut-off events. [2024-05-12 10:36:13,762 INFO L125 PetriNetUnfolderBase]: For 318/332 co-relation queries the response was YES. [2024-05-12 10:36:13,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4371 conditions, 1962 events. 1225/1962 cut-off events. For 318/332 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 10750 event pairs, 521 based on Foata normal form. 13/1942 useless extension candidates. Maximal degree in co-relation 4356. Up to 1745 conditions per place. [2024-05-12 10:36:13,773 INFO L140 encePairwiseOnDemand]: 39/46 looper letters, 43 selfloop transitions, 6 changer transitions 0/62 dead transitions. [2024-05-12 10:36:13,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 62 transitions, 260 flow [2024-05-12 10:36:13,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-05-12 10:36:13,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-05-12 10:36:13,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 120 transitions. [2024-05-12 10:36:13,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6521739130434783 [2024-05-12 10:36:13,779 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 116 flow. Second operand 4 states and 120 transitions. [2024-05-12 10:36:13,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 62 transitions, 260 flow [2024-05-12 10:36:13,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 62 transitions, 256 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-05-12 10:36:13,784 INFO L231 Difference]: Finished difference. Result has 52 places, 44 transitions, 139 flow [2024-05-12 10:36:13,788 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=139, PETRI_PLACES=52, PETRI_TRANSITIONS=44} [2024-05-12 10:36:13,789 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 2 predicate places. [2024-05-12 10:36:13,789 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 44 transitions, 139 flow [2024-05-12 10:36:13,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:13,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:13,789 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:36:13,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-05-12 10:36:13,790 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:36:13,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:13,791 INFO L85 PathProgramCache]: Analyzing trace with hash 903873776, now seen corresponding path program 1 times [2024-05-12 10:36:13,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:13,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56273581] [2024-05-12 10:36:13,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:13,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:13,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:14,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:36:14,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:14,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56273581] [2024-05-12 10:36:14,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56273581] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:14,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:14,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 10:36:14,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528115271] [2024-05-12 10:36:14,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:14,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 10:36:14,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:14,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 10:36:14,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-05-12 10:36:14,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 10:36:14,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 44 transitions, 139 flow. Second operand has 5 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:14,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:14,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 10:36:14,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:14,346 INFO L124 PetriNetUnfolderBase]: 1264/2181 cut-off events. [2024-05-12 10:36:14,346 INFO L125 PetriNetUnfolderBase]: For 913/913 co-relation queries the response was YES. [2024-05-12 10:36:14,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4991 conditions, 2181 events. 1264/2181 cut-off events. For 913/913 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 12775 event pairs, 296 based on Foata normal form. 6/2176 useless extension candidates. Maximal degree in co-relation 4974. Up to 1744 conditions per place. [2024-05-12 10:36:14,359 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 52 selfloop transitions, 14 changer transitions 0/79 dead transitions. [2024-05-12 10:36:14,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 79 transitions, 369 flow [2024-05-12 10:36:14,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 10:36:14,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 10:36:14,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 151 transitions. [2024-05-12 10:36:14,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6565217391304348 [2024-05-12 10:36:14,363 INFO L175 Difference]: Start difference. First operand has 52 places, 44 transitions, 139 flow. Second operand 5 states and 151 transitions. [2024-05-12 10:36:14,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 79 transitions, 369 flow [2024-05-12 10:36:14,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 79 transitions, 356 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-05-12 10:36:14,368 INFO L231 Difference]: Finished difference. Result has 56 places, 54 transitions, 218 flow [2024-05-12 10:36:14,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=218, PETRI_PLACES=56, PETRI_TRANSITIONS=54} [2024-05-12 10:36:14,369 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 6 predicate places. [2024-05-12 10:36:14,369 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 54 transitions, 218 flow [2024-05-12 10:36:14,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:14,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:14,370 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:36:14,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-05-12 10:36:14,370 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:36:14,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:14,370 INFO L85 PathProgramCache]: Analyzing trace with hash -2044682512, now seen corresponding path program 1 times [2024-05-12 10:36:14,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:14,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733068790] [2024-05-12 10:36:14,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:14,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:14,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:14,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:36:14,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:14,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733068790] [2024-05-12 10:36:14,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733068790] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:14,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:14,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 10:36:14,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441794806] [2024-05-12 10:36:14,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:14,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 10:36:14,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:14,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 10:36:14,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-05-12 10:36:14,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 10:36:14,669 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 54 transitions, 218 flow. Second operand has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:14,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:14,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 10:36:14,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:14,887 INFO L124 PetriNetUnfolderBase]: 1248/2004 cut-off events. [2024-05-12 10:36:14,887 INFO L125 PetriNetUnfolderBase]: For 1994/1994 co-relation queries the response was YES. [2024-05-12 10:36:14,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5924 conditions, 2004 events. 1248/2004 cut-off events. For 1994/1994 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 11282 event pairs, 290 based on Foata normal form. 6/2003 useless extension candidates. Maximal degree in co-relation 5905. Up to 1728 conditions per place. [2024-05-12 10:36:14,902 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 50 selfloop transitions, 14 changer transitions 0/77 dead transitions. [2024-05-12 10:36:14,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 77 transitions, 408 flow [2024-05-12 10:36:14,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 10:36:14,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 10:36:14,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 149 transitions. [2024-05-12 10:36:14,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6478260869565218 [2024-05-12 10:36:14,904 INFO L175 Difference]: Start difference. First operand has 56 places, 54 transitions, 218 flow. Second operand 5 states and 149 transitions. [2024-05-12 10:36:14,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 77 transitions, 408 flow [2024-05-12 10:36:14,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 77 transitions, 392 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-05-12 10:36:14,913 INFO L231 Difference]: Finished difference. Result has 60 places, 54 transitions, 240 flow [2024-05-12 10:36:14,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=240, PETRI_PLACES=60, PETRI_TRANSITIONS=54} [2024-05-12 10:36:14,915 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 10 predicate places. [2024-05-12 10:36:14,915 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 54 transitions, 240 flow [2024-05-12 10:36:14,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:14,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:14,916 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:36:14,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-05-12 10:36:14,916 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:36:14,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:14,916 INFO L85 PathProgramCache]: Analyzing trace with hash 438370655, now seen corresponding path program 1 times [2024-05-12 10:36:14,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:14,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294782087] [2024-05-12 10:36:14,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:14,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:14,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:15,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:36:15,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:15,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294782087] [2024-05-12 10:36:15,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294782087] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:15,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:15,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:36:15,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678522767] [2024-05-12 10:36:15,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:15,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:36:15,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:15,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:36:15,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:36:15,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:36:15,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 54 transitions, 240 flow. Second operand has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:15,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:15,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:36:15,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:15,611 INFO L124 PetriNetUnfolderBase]: 1675/2661 cut-off events. [2024-05-12 10:36:15,612 INFO L125 PetriNetUnfolderBase]: For 3102/3104 co-relation queries the response was YES. [2024-05-12 10:36:15,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8120 conditions, 2661 events. 1675/2661 cut-off events. For 3102/3104 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 15152 event pairs, 334 based on Foata normal form. 3/2656 useless extension candidates. Maximal degree in co-relation 8099. Up to 2133 conditions per place. [2024-05-12 10:36:15,627 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 70 selfloop transitions, 30 changer transitions 0/112 dead transitions. [2024-05-12 10:36:15,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 112 transitions, 678 flow [2024-05-12 10:36:15,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:36:15,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:36:15,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 220 transitions. [2024-05-12 10:36:15,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5978260869565217 [2024-05-12 10:36:15,630 INFO L175 Difference]: Start difference. First operand has 60 places, 54 transitions, 240 flow. Second operand 8 states and 220 transitions. [2024-05-12 10:36:15,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 112 transitions, 678 flow [2024-05-12 10:36:15,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 112 transitions, 642 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-05-12 10:36:15,634 INFO L231 Difference]: Finished difference. Result has 67 places, 72 transitions, 426 flow [2024-05-12 10:36:15,635 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=426, PETRI_PLACES=67, PETRI_TRANSITIONS=72} [2024-05-12 10:36:15,635 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 17 predicate places. [2024-05-12 10:36:15,635 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 72 transitions, 426 flow [2024-05-12 10:36:15,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:15,636 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:15,636 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:36:15,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-05-12 10:36:15,636 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:36:15,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:15,636 INFO L85 PathProgramCache]: Analyzing trace with hash -692223369, now seen corresponding path program 2 times [2024-05-12 10:36:15,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:15,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265457503] [2024-05-12 10:36:15,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:15,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:15,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:15,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:36:15,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:15,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265457503] [2024-05-12 10:36:15,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265457503] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:15,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:15,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:36:15,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576410869] [2024-05-12 10:36:15,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:15,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:36:15,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:15,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:36:15,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:36:15,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 46 [2024-05-12 10:36:15,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 72 transitions, 426 flow. Second operand has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:15,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:15,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 46 [2024-05-12 10:36:15,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:16,274 INFO L124 PetriNetUnfolderBase]: 2009/3170 cut-off events. [2024-05-12 10:36:16,275 INFO L125 PetriNetUnfolderBase]: For 5746/5748 co-relation queries the response was YES. [2024-05-12 10:36:16,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10919 conditions, 3170 events. 2009/3170 cut-off events. For 5746/5748 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 18126 event pairs, 383 based on Foata normal form. 3/3166 useless extension candidates. Maximal degree in co-relation 10893. Up to 2548 conditions per place. [2024-05-12 10:36:16,292 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 67 selfloop transitions, 30 changer transitions 0/108 dead transitions. [2024-05-12 10:36:16,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 108 transitions, 730 flow [2024-05-12 10:36:16,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:36:16,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:36:16,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 190 transitions. [2024-05-12 10:36:16,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5900621118012422 [2024-05-12 10:36:16,294 INFO L175 Difference]: Start difference. First operand has 67 places, 72 transitions, 426 flow. Second operand 7 states and 190 transitions. [2024-05-12 10:36:16,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 108 transitions, 730 flow [2024-05-12 10:36:16,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 108 transitions, 696 flow, removed 14 selfloop flow, removed 2 redundant places. [2024-05-12 10:36:16,306 INFO L231 Difference]: Finished difference. Result has 72 places, 72 transitions, 466 flow [2024-05-12 10:36:16,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=392, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=466, PETRI_PLACES=72, PETRI_TRANSITIONS=72} [2024-05-12 10:36:16,307 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 22 predicate places. [2024-05-12 10:36:16,307 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 72 transitions, 466 flow [2024-05-12 10:36:16,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:16,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:16,308 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:36:16,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-05-12 10:36:16,308 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:36:16,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:16,308 INFO L85 PathProgramCache]: Analyzing trace with hash -2139790609, now seen corresponding path program 1 times [2024-05-12 10:36:16,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:16,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364148571] [2024-05-12 10:36:16,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:16,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:16,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:16,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:36:16,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:16,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364148571] [2024-05-12 10:36:16,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364148571] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:16,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:16,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:36:16,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334940927] [2024-05-12 10:36:16,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:16,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:36:16,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:16,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:36:16,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:36:16,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 10:36:16,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 72 transitions, 466 flow. Second operand has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:16,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:16,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 10:36:16,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:16,881 INFO L124 PetriNetUnfolderBase]: 1556/2659 cut-off events. [2024-05-12 10:36:16,881 INFO L125 PetriNetUnfolderBase]: For 6376/6390 co-relation queries the response was YES. [2024-05-12 10:36:16,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9135 conditions, 2659 events. 1556/2659 cut-off events. For 6376/6390 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 15979 event pairs, 254 based on Foata normal form. 40/2666 useless extension candidates. Maximal degree in co-relation 9107. Up to 1889 conditions per place. [2024-05-12 10:36:16,896 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 72 selfloop transitions, 21 changer transitions 0/107 dead transitions. [2024-05-12 10:36:16,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 107 transitions, 760 flow [2024-05-12 10:36:16,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:36:16,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:36:16,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 179 transitions. [2024-05-12 10:36:16,898 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6485507246376812 [2024-05-12 10:36:16,898 INFO L175 Difference]: Start difference. First operand has 72 places, 72 transitions, 466 flow. Second operand 6 states and 179 transitions. [2024-05-12 10:36:16,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 107 transitions, 760 flow [2024-05-12 10:36:16,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 107 transitions, 693 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-05-12 10:36:16,906 INFO L231 Difference]: Finished difference. Result has 72 places, 75 transitions, 478 flow [2024-05-12 10:36:16,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=399, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=478, PETRI_PLACES=72, PETRI_TRANSITIONS=75} [2024-05-12 10:36:16,907 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 22 predicate places. [2024-05-12 10:36:16,907 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 75 transitions, 478 flow [2024-05-12 10:36:16,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:16,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:16,907 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:36:16,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-05-12 10:36:16,908 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:36:16,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:16,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1909274889, now seen corresponding path program 1 times [2024-05-12 10:36:16,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:16,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257148061] [2024-05-12 10:36:16,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:16,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:16,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:17,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:36:17,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:17,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257148061] [2024-05-12 10:36:17,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257148061] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:17,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:17,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:36:17,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916440393] [2024-05-12 10:36:17,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:17,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:36:17,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:17,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:36:17,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:36:17,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:36:17,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 75 transitions, 478 flow. Second operand has 8 states, 8 states have (on average 17.625) internal successors, (141), 8 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:17,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:17,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:36:17,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:17,495 INFO L124 PetriNetUnfolderBase]: 1901/3057 cut-off events. [2024-05-12 10:36:17,495 INFO L125 PetriNetUnfolderBase]: For 6416/6418 co-relation queries the response was YES. [2024-05-12 10:36:17,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11193 conditions, 3057 events. 1901/3057 cut-off events. For 6416/6418 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 17987 event pairs, 390 based on Foata normal form. 3/3052 useless extension candidates. Maximal degree in co-relation 11166. Up to 2451 conditions per place. [2024-05-12 10:36:17,518 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 72 selfloop transitions, 37 changer transitions 0/121 dead transitions. [2024-05-12 10:36:17,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 121 transitions, 896 flow [2024-05-12 10:36:17,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:36:17,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:36:17,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 218 transitions. [2024-05-12 10:36:17,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.592391304347826 [2024-05-12 10:36:17,520 INFO L175 Difference]: Start difference. First operand has 72 places, 75 transitions, 478 flow. Second operand 8 states and 218 transitions. [2024-05-12 10:36:17,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 121 transitions, 896 flow [2024-05-12 10:36:17,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 121 transitions, 846 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-05-12 10:36:17,592 INFO L231 Difference]: Finished difference. Result has 78 places, 84 transitions, 615 flow [2024-05-12 10:36:17,592 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=435, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=615, PETRI_PLACES=78, PETRI_TRANSITIONS=84} [2024-05-12 10:36:17,594 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 28 predicate places. [2024-05-12 10:36:17,594 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 84 transitions, 615 flow [2024-05-12 10:36:17,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.625) internal successors, (141), 8 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:17,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:17,595 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:36:17,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-05-12 10:36:17,595 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:36:17,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:17,595 INFO L85 PathProgramCache]: Analyzing trace with hash 15919125, now seen corresponding path program 2 times [2024-05-12 10:36:17,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:17,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672014759] [2024-05-12 10:36:17,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:17,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:17,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:17,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:36:17,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:17,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672014759] [2024-05-12 10:36:17,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672014759] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:17,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:17,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:36:17,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362391299] [2024-05-12 10:36:17,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:17,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:36:17,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:17,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:36:17,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:36:17,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 46 [2024-05-12 10:36:17,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 84 transitions, 615 flow. Second operand has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 7 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:17,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:17,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 46 [2024-05-12 10:36:17,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:18,274 INFO L124 PetriNetUnfolderBase]: 2335/3729 cut-off events. [2024-05-12 10:36:18,274 INFO L125 PetriNetUnfolderBase]: For 9026/9028 co-relation queries the response was YES. [2024-05-12 10:36:18,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13993 conditions, 3729 events. 2335/3729 cut-off events. For 9026/9028 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 22043 event pairs, 457 based on Foata normal form. 3/3725 useless extension candidates. Maximal degree in co-relation 13962. Up to 2983 conditions per place. [2024-05-12 10:36:18,296 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 71 selfloop transitions, 41 changer transitions 0/123 dead transitions. [2024-05-12 10:36:18,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 123 transitions, 1005 flow [2024-05-12 10:36:18,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:36:18,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:36:18,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 190 transitions. [2024-05-12 10:36:18,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5900621118012422 [2024-05-12 10:36:18,298 INFO L175 Difference]: Start difference. First operand has 78 places, 84 transitions, 615 flow. Second operand 7 states and 190 transitions. [2024-05-12 10:36:18,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 123 transitions, 1005 flow [2024-05-12 10:36:18,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 123 transitions, 909 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-05-12 10:36:18,318 INFO L231 Difference]: Finished difference. Result has 80 places, 88 transitions, 663 flow [2024-05-12 10:36:18,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=527, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=663, PETRI_PLACES=80, PETRI_TRANSITIONS=88} [2024-05-12 10:36:18,319 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 30 predicate places. [2024-05-12 10:36:18,319 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 88 transitions, 663 flow [2024-05-12 10:36:18,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 7 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:18,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:18,319 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:36:18,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-05-12 10:36:18,321 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:36:18,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:18,322 INFO L85 PathProgramCache]: Analyzing trace with hash 15913545, now seen corresponding path program 3 times [2024-05-12 10:36:18,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:18,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181401686] [2024-05-12 10:36:18,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:18,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:18,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:18,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:36:18,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:18,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181401686] [2024-05-12 10:36:18,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181401686] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:18,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:18,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:36:18,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468083566] [2024-05-12 10:36:18,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:18,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:36:18,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:18,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:36:18,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:36:18,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 46 [2024-05-12 10:36:18,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 88 transitions, 663 flow. Second operand has 8 states, 8 states have (on average 16.625) internal successors, (133), 8 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:18,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:18,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 46 [2024-05-12 10:36:18,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:19,121 INFO L124 PetriNetUnfolderBase]: 2327/3706 cut-off events. [2024-05-12 10:36:19,121 INFO L125 PetriNetUnfolderBase]: For 9477/9479 co-relation queries the response was YES. [2024-05-12 10:36:19,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14029 conditions, 3706 events. 2327/3706 cut-off events. For 9477/9479 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 21909 event pairs, 451 based on Foata normal form. 3/3702 useless extension candidates. Maximal degree in co-relation 13997. Up to 2975 conditions per place. [2024-05-12 10:36:19,141 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 76 selfloop transitions, 41 changer transitions 0/128 dead transitions. [2024-05-12 10:36:19,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 128 transitions, 999 flow [2024-05-12 10:36:19,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:36:19,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:36:19,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 214 transitions. [2024-05-12 10:36:19,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5815217391304348 [2024-05-12 10:36:19,143 INFO L175 Difference]: Start difference. First operand has 80 places, 88 transitions, 663 flow. Second operand 8 states and 214 transitions. [2024-05-12 10:36:19,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 128 transitions, 999 flow [2024-05-12 10:36:19,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 128 transitions, 911 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-05-12 10:36:19,165 INFO L231 Difference]: Finished difference. Result has 83 places, 88 transitions, 667 flow [2024-05-12 10:36:19,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=575, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=667, PETRI_PLACES=83, PETRI_TRANSITIONS=88} [2024-05-12 10:36:19,167 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 33 predicate places. [2024-05-12 10:36:19,167 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 88 transitions, 667 flow [2024-05-12 10:36:19,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.625) internal successors, (133), 8 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:19,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:19,168 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:36:19,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-05-12 10:36:19,168 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:36:19,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:19,168 INFO L85 PathProgramCache]: Analyzing trace with hash 33657623, now seen corresponding path program 1 times [2024-05-12 10:36:19,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:19,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636343615] [2024-05-12 10:36:19,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:19,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:19,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:19,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:36:19,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:19,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636343615] [2024-05-12 10:36:19,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636343615] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:19,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:19,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 10:36:19,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089711383] [2024-05-12 10:36:19,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:19,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-05-12 10:36:19,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:19,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-05-12 10:36:19,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-05-12 10:36:19,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 10:36:19,461 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 88 transitions, 667 flow. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:19,461 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:19,461 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 10:36:19,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:19,662 INFO L124 PetriNetUnfolderBase]: 1774/2911 cut-off events. [2024-05-12 10:36:19,662 INFO L125 PetriNetUnfolderBase]: For 8675/8689 co-relation queries the response was YES. [2024-05-12 10:36:19,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11174 conditions, 2911 events. 1774/2911 cut-off events. For 8675/8689 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 17408 event pairs, 428 based on Foata normal form. 1/2889 useless extension candidates. Maximal degree in co-relation 11142. Up to 2526 conditions per place. [2024-05-12 10:36:19,679 INFO L140 encePairwiseOnDemand]: 40/46 looper letters, 82 selfloop transitions, 7 changer transitions 0/107 dead transitions. [2024-05-12 10:36:19,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 107 transitions, 919 flow [2024-05-12 10:36:19,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-05-12 10:36:19,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-05-12 10:36:19,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 114 transitions. [2024-05-12 10:36:19,681 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6195652173913043 [2024-05-12 10:36:19,681 INFO L175 Difference]: Start difference. First operand has 83 places, 88 transitions, 667 flow. Second operand 4 states and 114 transitions. [2024-05-12 10:36:19,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 107 transitions, 919 flow [2024-05-12 10:36:19,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 107 transitions, 794 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-05-12 10:36:19,695 INFO L231 Difference]: Finished difference. Result has 80 places, 94 transitions, 614 flow [2024-05-12 10:36:19,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=547, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=614, PETRI_PLACES=80, PETRI_TRANSITIONS=94} [2024-05-12 10:36:19,695 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 30 predicate places. [2024-05-12 10:36:19,696 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 94 transitions, 614 flow [2024-05-12 10:36:19,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:19,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:19,696 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:36:19,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-05-12 10:36:19,696 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:36:19,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:19,697 INFO L85 PathProgramCache]: Analyzing trace with hash -1057807460, now seen corresponding path program 1 times [2024-05-12 10:36:19,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:19,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701991356] [2024-05-12 10:36:19,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:19,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:19,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:20,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:36:20,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:20,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701991356] [2024-05-12 10:36:20,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701991356] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:20,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:20,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:36:20,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974450461] [2024-05-12 10:36:20,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:20,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:36:20,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:20,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:36:20,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:36:20,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:36:20,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 94 transitions, 614 flow. Second operand has 8 states, 8 states have (on average 17.625) internal successors, (141), 8 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:20,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:20,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:36:20,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:20,417 INFO L124 PetriNetUnfolderBase]: 2185/3509 cut-off events. [2024-05-12 10:36:20,418 INFO L125 PetriNetUnfolderBase]: For 10706/10708 co-relation queries the response was YES. [2024-05-12 10:36:20,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13309 conditions, 3509 events. 2185/3509 cut-off events. For 10706/10708 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 21059 event pairs, 175 based on Foata normal form. 6/3509 useless extension candidates. Maximal degree in co-relation 13277. Up to 2300 conditions per place. [2024-05-12 10:36:20,437 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 93 selfloop transitions, 33 changer transitions 0/138 dead transitions. [2024-05-12 10:36:20,438 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 138 transitions, 1062 flow [2024-05-12 10:36:20,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:36:20,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:36:20,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 197 transitions. [2024-05-12 10:36:20,439 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6118012422360248 [2024-05-12 10:36:20,439 INFO L175 Difference]: Start difference. First operand has 80 places, 94 transitions, 614 flow. Second operand 7 states and 197 transitions. [2024-05-12 10:36:20,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 138 transitions, 1062 flow [2024-05-12 10:36:20,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 138 transitions, 1050 flow, removed 6 selfloop flow, removed 0 redundant places. [2024-05-12 10:36:20,460 INFO L231 Difference]: Finished difference. Result has 88 places, 101 transitions, 753 flow [2024-05-12 10:36:20,460 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=602, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=753, PETRI_PLACES=88, PETRI_TRANSITIONS=101} [2024-05-12 10:36:20,461 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 38 predicate places. [2024-05-12 10:36:20,461 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 101 transitions, 753 flow [2024-05-12 10:36:20,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.625) internal successors, (141), 8 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:20,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:20,461 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:36:20,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-05-12 10:36:20,462 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:36:20,462 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:20,462 INFO L85 PathProgramCache]: Analyzing trace with hash 1237494476, now seen corresponding path program 2 times [2024-05-12 10:36:20,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:20,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101847810] [2024-05-12 10:36:20,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:20,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:20,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:20,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:36:20,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:20,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101847810] [2024-05-12 10:36:20,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101847810] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:20,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:20,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:36:20,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584942180] [2024-05-12 10:36:20,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:20,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:36:20,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:20,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:36:20,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:36:20,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 46 [2024-05-12 10:36:20,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 101 transitions, 753 flow. Second operand has 8 states, 8 states have (on average 16.625) internal successors, (133), 8 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:20,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:20,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 46 [2024-05-12 10:36:20,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:21,212 INFO L124 PetriNetUnfolderBase]: 2629/4181 cut-off events. [2024-05-12 10:36:21,213 INFO L125 PetriNetUnfolderBase]: For 14956/14958 co-relation queries the response was YES. [2024-05-12 10:36:21,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16951 conditions, 4181 events. 2629/4181 cut-off events. For 14956/14958 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 25025 event pairs, 531 based on Foata normal form. 6/4180 useless extension candidates. Maximal degree in co-relation 16914. Up to 3519 conditions per place. [2024-05-12 10:36:21,240 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 98 selfloop transitions, 28 changer transitions 0/137 dead transitions. [2024-05-12 10:36:21,240 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 137 transitions, 1121 flow [2024-05-12 10:36:21,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:36:21,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:36:21,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 188 transitions. [2024-05-12 10:36:21,241 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5838509316770186 [2024-05-12 10:36:21,242 INFO L175 Difference]: Start difference. First operand has 88 places, 101 transitions, 753 flow. Second operand 7 states and 188 transitions. [2024-05-12 10:36:21,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 137 transitions, 1121 flow [2024-05-12 10:36:21,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 137 transitions, 1075 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-05-12 10:36:21,272 INFO L231 Difference]: Finished difference. Result has 92 places, 104 transitions, 811 flow [2024-05-12 10:36:21,272 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=707, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=811, PETRI_PLACES=92, PETRI_TRANSITIONS=104} [2024-05-12 10:36:21,273 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 42 predicate places. [2024-05-12 10:36:21,273 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 104 transitions, 811 flow [2024-05-12 10:36:21,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.625) internal successors, (133), 8 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:21,273 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:21,273 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:36:21,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-05-12 10:36:21,274 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:36:21,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:21,274 INFO L85 PathProgramCache]: Analyzing trace with hash 493316470, now seen corresponding path program 3 times [2024-05-12 10:36:21,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:21,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611640934] [2024-05-12 10:36:21,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:21,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:21,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:21,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:36:21,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:21,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611640934] [2024-05-12 10:36:21,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611640934] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:21,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:21,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:36:21,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190766972] [2024-05-12 10:36:21,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:21,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:36:21,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:21,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:36:21,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:36:21,615 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 46 [2024-05-12 10:36:21,615 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 104 transitions, 811 flow. Second operand has 8 states, 8 states have (on average 16.625) internal successors, (133), 8 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:21,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:21,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 46 [2024-05-12 10:36:21,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:22,074 INFO L124 PetriNetUnfolderBase]: 2644/4214 cut-off events. [2024-05-12 10:36:22,075 INFO L125 PetriNetUnfolderBase]: For 17460/17462 co-relation queries the response was YES. [2024-05-12 10:36:22,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17636 conditions, 4214 events. 2644/4214 cut-off events. For 17460/17462 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 25366 event pairs, 531 based on Foata normal form. 6/4213 useless extension candidates. Maximal degree in co-relation 17597. Up to 3394 conditions per place. [2024-05-12 10:36:22,097 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 90 selfloop transitions, 46 changer transitions 0/147 dead transitions. [2024-05-12 10:36:22,097 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 147 transitions, 1215 flow [2024-05-12 10:36:22,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:36:22,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:36:22,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 214 transitions. [2024-05-12 10:36:22,099 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5815217391304348 [2024-05-12 10:36:22,099 INFO L175 Difference]: Start difference. First operand has 92 places, 104 transitions, 811 flow. Second operand 8 states and 214 transitions. [2024-05-12 10:36:22,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 147 transitions, 1215 flow [2024-05-12 10:36:22,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 147 transitions, 1141 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-05-12 10:36:22,130 INFO L231 Difference]: Finished difference. Result has 95 places, 107 transitions, 878 flow [2024-05-12 10:36:22,130 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=737, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=878, PETRI_PLACES=95, PETRI_TRANSITIONS=107} [2024-05-12 10:36:22,130 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 45 predicate places. [2024-05-12 10:36:22,131 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 107 transitions, 878 flow [2024-05-12 10:36:22,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.625) internal successors, (133), 8 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:22,131 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:22,131 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:36:22,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-05-12 10:36:22,131 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:36:22,132 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:22,132 INFO L85 PathProgramCache]: Analyzing trace with hash -135801882, now seen corresponding path program 1 times [2024-05-12 10:36:22,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:22,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304204847] [2024-05-12 10:36:22,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:22,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:22,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:22,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:36:22,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:22,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304204847] [2024-05-12 10:36:22,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304204847] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:22,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:22,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:36:22,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285306785] [2024-05-12 10:36:22,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:22,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:36:22,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:22,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:36:22,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:36:22,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 10:36:22,422 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 107 transitions, 878 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:22,422 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:22,422 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 10:36:22,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:22,748 INFO L124 PetriNetUnfolderBase]: 2087/3387 cut-off events. [2024-05-12 10:36:22,748 INFO L125 PetriNetUnfolderBase]: For 17501/17501 co-relation queries the response was YES. [2024-05-12 10:36:22,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14843 conditions, 3387 events. 2087/3387 cut-off events. For 17501/17501 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 20796 event pairs, 431 based on Foata normal form. 3/3383 useless extension candidates. Maximal degree in co-relation 14803. Up to 2830 conditions per place. [2024-05-12 10:36:22,799 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 94 selfloop transitions, 30 changer transitions 0/141 dead transitions. [2024-05-12 10:36:22,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 141 transitions, 1290 flow [2024-05-12 10:36:22,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:36:22,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:36:22,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 173 transitions. [2024-05-12 10:36:22,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6268115942028986 [2024-05-12 10:36:22,813 INFO L175 Difference]: Start difference. First operand has 95 places, 107 transitions, 878 flow. Second operand 6 states and 173 transitions. [2024-05-12 10:36:22,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 141 transitions, 1290 flow [2024-05-12 10:36:22,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 141 transitions, 1175 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-05-12 10:36:22,873 INFO L231 Difference]: Finished difference. Result has 96 places, 115 transitions, 931 flow [2024-05-12 10:36:22,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=763, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=931, PETRI_PLACES=96, PETRI_TRANSITIONS=115} [2024-05-12 10:36:22,874 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 46 predicate places. [2024-05-12 10:36:22,874 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 115 transitions, 931 flow [2024-05-12 10:36:22,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:22,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:22,875 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:36:22,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-05-12 10:36:22,875 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:36:22,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:22,876 INFO L85 PathProgramCache]: Analyzing trace with hash 203626716, now seen corresponding path program 1 times [2024-05-12 10:36:22,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:22,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451694137] [2024-05-12 10:36:22,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:22,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:22,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:23,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:36:23,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:23,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451694137] [2024-05-12 10:36:23,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451694137] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:23,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:23,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:36:23,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199143187] [2024-05-12 10:36:23,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:23,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:36:23,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:23,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:36:23,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:36:23,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 46 [2024-05-12 10:36:23,183 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 115 transitions, 931 flow. Second operand has 8 states, 8 states have (on average 16.75) internal successors, (134), 8 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:23,183 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:23,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 46 [2024-05-12 10:36:23,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:23,679 INFO L124 PetriNetUnfolderBase]: 2636/4159 cut-off events. [2024-05-12 10:36:23,680 INFO L125 PetriNetUnfolderBase]: For 23406/23408 co-relation queries the response was YES. [2024-05-12 10:36:23,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18586 conditions, 4159 events. 2636/4159 cut-off events. For 23406/23408 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 24678 event pairs, 196 based on Foata normal form. 18/4171 useless extension candidates. Maximal degree in co-relation 18545. Up to 2814 conditions per place. [2024-05-12 10:36:23,708 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 109 selfloop transitions, 36 changer transitions 0/156 dead transitions. [2024-05-12 10:36:23,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 156 transitions, 1360 flow [2024-05-12 10:36:23,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:36:23,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:36:23,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 194 transitions. [2024-05-12 10:36:23,711 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6024844720496895 [2024-05-12 10:36:23,711 INFO L175 Difference]: Start difference. First operand has 96 places, 115 transitions, 931 flow. Second operand 7 states and 194 transitions. [2024-05-12 10:36:23,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 156 transitions, 1360 flow [2024-05-12 10:36:23,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 156 transitions, 1307 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-05-12 10:36:23,762 INFO L231 Difference]: Finished difference. Result has 101 places, 116 transitions, 973 flow [2024-05-12 10:36:23,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=880, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=973, PETRI_PLACES=101, PETRI_TRANSITIONS=116} [2024-05-12 10:36:23,763 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 51 predicate places. [2024-05-12 10:36:23,763 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 116 transitions, 973 flow [2024-05-12 10:36:23,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.75) internal successors, (134), 8 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:23,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:23,764 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:36:23,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-05-12 10:36:23,764 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:36:23,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:23,764 INFO L85 PathProgramCache]: Analyzing trace with hash 739675180, now seen corresponding path program 2 times [2024-05-12 10:36:23,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:23,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154383610] [2024-05-12 10:36:23,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:23,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:23,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:24,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:36:24,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:24,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154383610] [2024-05-12 10:36:24,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154383610] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:24,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:24,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:36:24,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347589722] [2024-05-12 10:36:24,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:24,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:36:24,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:24,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:36:24,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:36:24,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 46 [2024-05-12 10:36:24,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 116 transitions, 973 flow. Second operand has 8 states, 8 states have (on average 16.75) internal successors, (134), 8 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:24,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:24,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 46 [2024-05-12 10:36:24,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:24,552 INFO L124 PetriNetUnfolderBase]: 2830/4477 cut-off events. [2024-05-12 10:36:24,552 INFO L125 PetriNetUnfolderBase]: For 27272/27274 co-relation queries the response was YES. [2024-05-12 10:36:24,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20395 conditions, 4477 events. 2830/4477 cut-off events. For 27272/27274 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 27026 event pairs, 522 based on Foata normal form. 24/4494 useless extension candidates. Maximal degree in co-relation 20351. Up to 3466 conditions per place. [2024-05-12 10:36:24,580 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 105 selfloop transitions, 45 changer transitions 0/161 dead transitions. [2024-05-12 10:36:24,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 161 transitions, 1423 flow [2024-05-12 10:36:24,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:36:24,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:36:24,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 216 transitions. [2024-05-12 10:36:24,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5869565217391305 [2024-05-12 10:36:24,582 INFO L175 Difference]: Start difference. First operand has 101 places, 116 transitions, 973 flow. Second operand 8 states and 216 transitions. [2024-05-12 10:36:24,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 161 transitions, 1423 flow [2024-05-12 10:36:24,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 161 transitions, 1355 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-05-12 10:36:24,631 INFO L231 Difference]: Finished difference. Result has 105 places, 118 transitions, 1039 flow [2024-05-12 10:36:24,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=905, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1039, PETRI_PLACES=105, PETRI_TRANSITIONS=118} [2024-05-12 10:36:24,631 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 55 predicate places. [2024-05-12 10:36:24,631 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 118 transitions, 1039 flow [2024-05-12 10:36:24,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.75) internal successors, (134), 8 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:24,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:24,632 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:36:24,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-05-12 10:36:24,632 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:36:24,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:24,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1886909240, now seen corresponding path program 3 times [2024-05-12 10:36:24,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:24,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142515231] [2024-05-12 10:36:24,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:24,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:24,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:24,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:36:24,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:24,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142515231] [2024-05-12 10:36:24,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142515231] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:24,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:24,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:36:24,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111123049] [2024-05-12 10:36:24,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:24,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:36:24,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:24,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:36:24,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:36:24,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 46 [2024-05-12 10:36:24,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 118 transitions, 1039 flow. Second operand has 9 states, 9 states have (on average 16.555555555555557) internal successors, (149), 9 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:24,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:24,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 46 [2024-05-12 10:36:24,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:25,550 INFO L124 PetriNetUnfolderBase]: 3024/4791 cut-off events. [2024-05-12 10:36:25,551 INFO L125 PetriNetUnfolderBase]: For 33014/33016 co-relation queries the response was YES. [2024-05-12 10:36:25,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21987 conditions, 4791 events. 3024/4791 cut-off events. For 33014/33016 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 29292 event pairs, 556 based on Foata normal form. 24/4808 useless extension candidates. Maximal degree in co-relation 21942. Up to 3790 conditions per place. [2024-05-12 10:36:25,577 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 114 selfloop transitions, 45 changer transitions 0/170 dead transitions. [2024-05-12 10:36:25,577 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 170 transitions, 1527 flow [2024-05-12 10:36:25,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 10:36:25,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 10:36:25,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 242 transitions. [2024-05-12 10:36:25,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5845410628019324 [2024-05-12 10:36:25,579 INFO L175 Difference]: Start difference. First operand has 105 places, 118 transitions, 1039 flow. Second operand 9 states and 242 transitions. [2024-05-12 10:36:25,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 170 transitions, 1527 flow [2024-05-12 10:36:25,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 170 transitions, 1427 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-05-12 10:36:25,638 INFO L231 Difference]: Finished difference. Result has 108 places, 120 transitions, 1075 flow [2024-05-12 10:36:25,638 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=939, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1075, PETRI_PLACES=108, PETRI_TRANSITIONS=120} [2024-05-12 10:36:25,638 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 58 predicate places. [2024-05-12 10:36:25,639 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 120 transitions, 1075 flow [2024-05-12 10:36:25,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.555555555555557) internal successors, (149), 9 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:25,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:25,639 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:36:25,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-05-12 10:36:25,639 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:36:25,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:25,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1887057110, now seen corresponding path program 4 times [2024-05-12 10:36:25,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:25,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944188538] [2024-05-12 10:36:25,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:25,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:25,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:25,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:36:25,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:25,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944188538] [2024-05-12 10:36:25,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944188538] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:25,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:25,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:36:25,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771197799] [2024-05-12 10:36:25,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:25,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:36:25,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:25,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:36:25,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:36:25,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 46 [2024-05-12 10:36:25,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 120 transitions, 1075 flow. Second operand has 9 states, 9 states have (on average 16.555555555555557) internal successors, (149), 9 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:25,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:25,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 46 [2024-05-12 10:36:25,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:26,545 INFO L124 PetriNetUnfolderBase]: 3123/4970 cut-off events. [2024-05-12 10:36:26,545 INFO L125 PetriNetUnfolderBase]: For 35644/35646 co-relation queries the response was YES. [2024-05-12 10:36:26,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22769 conditions, 4970 events. 3123/4970 cut-off events. For 35644/35646 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 30753 event pairs, 548 based on Foata normal form. 18/4981 useless extension candidates. Maximal degree in co-relation 22723. Up to 3703 conditions per place. [2024-05-12 10:36:26,573 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 121 selfloop transitions, 50 changer transitions 0/182 dead transitions. [2024-05-12 10:36:26,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 182 transitions, 1619 flow [2024-05-12 10:36:26,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 10:36:26,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 10:36:26,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 270 transitions. [2024-05-12 10:36:26,575 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5869565217391305 [2024-05-12 10:36:26,575 INFO L175 Difference]: Start difference. First operand has 108 places, 120 transitions, 1075 flow. Second operand 10 states and 270 transitions. [2024-05-12 10:36:26,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 182 transitions, 1619 flow [2024-05-12 10:36:26,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 182 transitions, 1513 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-05-12 10:36:26,638 INFO L231 Difference]: Finished difference. Result has 111 places, 122 transitions, 1118 flow [2024-05-12 10:36:26,638 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=969, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1118, PETRI_PLACES=111, PETRI_TRANSITIONS=122} [2024-05-12 10:36:26,639 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 61 predicate places. [2024-05-12 10:36:26,639 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 122 transitions, 1118 flow [2024-05-12 10:36:26,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.555555555555557) internal successors, (149), 9 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:26,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:26,639 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:36:26,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-05-12 10:36:26,639 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:36:26,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:26,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1881331658, now seen corresponding path program 1 times [2024-05-12 10:36:26,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:26,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016406199] [2024-05-12 10:36:26,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:26,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:26,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:26,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:36:26,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:26,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016406199] [2024-05-12 10:36:26,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016406199] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:26,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:26,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:36:26,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604918969] [2024-05-12 10:36:26,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:26,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:36:26,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:26,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:36:26,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:36:26,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 46 [2024-05-12 10:36:26,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 122 transitions, 1118 flow. Second operand has 8 states, 8 states have (on average 16.75) internal successors, (134), 8 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:26,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:26,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 46 [2024-05-12 10:36:26,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:27,541 INFO L124 PetriNetUnfolderBase]: 3162/5025 cut-off events. [2024-05-12 10:36:27,542 INFO L125 PetriNetUnfolderBase]: For 36182/36184 co-relation queries the response was YES. [2024-05-12 10:36:27,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22983 conditions, 5025 events. 3162/5025 cut-off events. For 36182/36184 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 31026 event pairs, 475 based on Foata normal form. 18/5036 useless extension candidates. Maximal degree in co-relation 22936. Up to 3172 conditions per place. [2024-05-12 10:36:27,574 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 108 selfloop transitions, 50 changer transitions 0/169 dead transitions. [2024-05-12 10:36:27,574 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 169 transitions, 1564 flow [2024-05-12 10:36:27,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:36:27,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:36:27,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 218 transitions. [2024-05-12 10:36:27,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.592391304347826 [2024-05-12 10:36:27,577 INFO L175 Difference]: Start difference. First operand has 111 places, 122 transitions, 1118 flow. Second operand 8 states and 218 transitions. [2024-05-12 10:36:27,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 169 transitions, 1564 flow [2024-05-12 10:36:27,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 169 transitions, 1435 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-05-12 10:36:27,638 INFO L231 Difference]: Finished difference. Result has 110 places, 122 transitions, 1086 flow [2024-05-12 10:36:27,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=957, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1086, PETRI_PLACES=110, PETRI_TRANSITIONS=122} [2024-05-12 10:36:27,639 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 60 predicate places. [2024-05-12 10:36:27,639 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 122 transitions, 1086 flow [2024-05-12 10:36:27,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.75) internal successors, (134), 8 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:27,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:27,640 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:36:27,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-05-12 10:36:27,640 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:36:27,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:27,640 INFO L85 PathProgramCache]: Analyzing trace with hash 61324086, now seen corresponding path program 1 times [2024-05-12 10:36:27,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:27,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718122445] [2024-05-12 10:36:27,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:27,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:27,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:27,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:36:27,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:27,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718122445] [2024-05-12 10:36:27,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718122445] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:27,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:27,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:36:27,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56200197] [2024-05-12 10:36:27,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:27,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:36:27,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:27,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:36:27,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:36:28,017 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:36:28,017 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 122 transitions, 1086 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 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) [2024-05-12 10:36:28,017 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:28,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:36:28,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:28,540 INFO L124 PetriNetUnfolderBase]: 3124/5277 cut-off events. [2024-05-12 10:36:28,540 INFO L125 PetriNetUnfolderBase]: For 37757/37813 co-relation queries the response was YES. [2024-05-12 10:36:28,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23229 conditions, 5277 events. 3124/5277 cut-off events. For 37757/37813 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 34634 event pairs, 784 based on Foata normal form. 25/5258 useless extension candidates. Maximal degree in co-relation 23181. Up to 4399 conditions per place. [2024-05-12 10:36:28,568 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 128 selfloop transitions, 31 changer transitions 0/178 dead transitions. [2024-05-12 10:36:28,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 178 transitions, 1678 flow [2024-05-12 10:36:28,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 10:36:28,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 10:36:28,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 233 transitions. [2024-05-12 10:36:28,569 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5628019323671497 [2024-05-12 10:36:28,569 INFO L175 Difference]: Start difference. First operand has 110 places, 122 transitions, 1086 flow. Second operand 9 states and 233 transitions. [2024-05-12 10:36:28,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 178 transitions, 1678 flow [2024-05-12 10:36:28,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 178 transitions, 1539 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-05-12 10:36:28,622 INFO L231 Difference]: Finished difference. Result has 116 places, 142 transitions, 1202 flow [2024-05-12 10:36:28,622 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=959, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1202, PETRI_PLACES=116, PETRI_TRANSITIONS=142} [2024-05-12 10:36:28,622 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 66 predicate places. [2024-05-12 10:36:28,622 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 142 transitions, 1202 flow [2024-05-12 10:36:28,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 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) [2024-05-12 10:36:28,623 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:28,623 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:36:28,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-05-12 10:36:28,623 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:36:28,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:28,623 INFO L85 PathProgramCache]: Analyzing trace with hash -2015156392, now seen corresponding path program 2 times [2024-05-12 10:36:28,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:28,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192595357] [2024-05-12 10:36:28,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:28,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:28,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:28,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:36:28,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:28,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192595357] [2024-05-12 10:36:28,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192595357] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:28,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:28,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:36:28,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529109650] [2024-05-12 10:36:28,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:28,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:36:28,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:28,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:36:28,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:36:28,934 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 10:36:28,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 142 transitions, 1202 flow. Second operand has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:28,935 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:28,935 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 10:36:28,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:29,306 INFO L124 PetriNetUnfolderBase]: 2698/4462 cut-off events. [2024-05-12 10:36:29,306 INFO L125 PetriNetUnfolderBase]: For 35050/35165 co-relation queries the response was YES. [2024-05-12 10:36:29,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20373 conditions, 4462 events. 2698/4462 cut-off events. For 35050/35165 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 29065 event pairs, 969 based on Foata normal form. 22/4341 useless extension candidates. Maximal degree in co-relation 20321. Up to 3803 conditions per place. [2024-05-12 10:36:29,335 INFO L140 encePairwiseOnDemand]: 39/46 looper letters, 108 selfloop transitions, 24 changer transitions 0/154 dead transitions. [2024-05-12 10:36:29,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 154 transitions, 1498 flow [2024-05-12 10:36:29,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-05-12 10:36:29,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-05-12 10:36:29,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 115 transitions. [2024-05-12 10:36:29,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-05-12 10:36:29,337 INFO L175 Difference]: Start difference. First operand has 116 places, 142 transitions, 1202 flow. Second operand 4 states and 115 transitions. [2024-05-12 10:36:29,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 154 transitions, 1498 flow [2024-05-12 10:36:29,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 154 transitions, 1448 flow, removed 24 selfloop flow, removed 1 redundant places. [2024-05-12 10:36:29,388 INFO L231 Difference]: Finished difference. Result has 119 places, 142 transitions, 1218 flow [2024-05-12 10:36:29,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1152, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1218, PETRI_PLACES=119, PETRI_TRANSITIONS=142} [2024-05-12 10:36:29,388 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 69 predicate places. [2024-05-12 10:36:29,389 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 142 transitions, 1218 flow [2024-05-12 10:36:29,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:29,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:29,389 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:36:29,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-05-12 10:36:29,389 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:36:29,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:29,390 INFO L85 PathProgramCache]: Analyzing trace with hash -2014740682, now seen corresponding path program 3 times [2024-05-12 10:36:29,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:29,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833802282] [2024-05-12 10:36:29,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:29,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:29,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:29,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:36:29,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:29,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833802282] [2024-05-12 10:36:29,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833802282] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:29,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:29,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:36:29,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508374378] [2024-05-12 10:36:29,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:29,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:36:29,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:29,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:36:29,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:36:29,648 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 10:36:29,648 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 142 transitions, 1218 flow. Second operand has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:29,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:29,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 10:36:29,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:30,012 INFO L124 PetriNetUnfolderBase]: 2694/4395 cut-off events. [2024-05-12 10:36:30,013 INFO L125 PetriNetUnfolderBase]: For 35987/36082 co-relation queries the response was YES. [2024-05-12 10:36:30,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20384 conditions, 4395 events. 2694/4395 cut-off events. For 35987/36082 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 28109 event pairs, 582 based on Foata normal form. 18/4312 useless extension candidates. Maximal degree in co-relation 20330. Up to 3794 conditions per place. [2024-05-12 10:36:30,045 INFO L140 encePairwiseOnDemand]: 39/46 looper letters, 111 selfloop transitions, 27 changer transitions 0/160 dead transitions. [2024-05-12 10:36:30,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 160 transitions, 1558 flow [2024-05-12 10:36:30,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 10:36:30,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 10:36:30,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 138 transitions. [2024-05-12 10:36:30,047 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-05-12 10:36:30,047 INFO L175 Difference]: Start difference. First operand has 119 places, 142 transitions, 1218 flow. Second operand 5 states and 138 transitions. [2024-05-12 10:36:30,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 160 transitions, 1558 flow [2024-05-12 10:36:30,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 160 transitions, 1500 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-05-12 10:36:30,099 INFO L231 Difference]: Finished difference. Result has 120 places, 145 transitions, 1252 flow [2024-05-12 10:36:30,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1160, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1252, PETRI_PLACES=120, PETRI_TRANSITIONS=145} [2024-05-12 10:36:30,099 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 70 predicate places. [2024-05-12 10:36:30,099 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 145 transitions, 1252 flow [2024-05-12 10:36:30,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:30,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:30,100 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:36:30,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-05-12 10:36:30,100 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:36:30,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:30,101 INFO L85 PathProgramCache]: Analyzing trace with hash 84989918, now seen corresponding path program 1 times [2024-05-12 10:36:30,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:30,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984339316] [2024-05-12 10:36:30,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:30,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:30,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:30,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:36:30,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:30,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984339316] [2024-05-12 10:36:30,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984339316] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:30,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:30,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:36:30,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868860990] [2024-05-12 10:36:30,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:30,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:36:30,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:30,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:36:30,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:36:30,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 10:36:30,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 145 transitions, 1252 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:30,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:30,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 10:36:30,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:30,815 INFO L124 PetriNetUnfolderBase]: 2952/4875 cut-off events. [2024-05-12 10:36:30,816 INFO L125 PetriNetUnfolderBase]: For 37179/37197 co-relation queries the response was YES. [2024-05-12 10:36:30,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22635 conditions, 4875 events. 2952/4875 cut-off events. For 37179/37197 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 31935 event pairs, 585 based on Foata normal form. 20/4869 useless extension candidates. Maximal degree in co-relation 22581. Up to 4045 conditions per place. [2024-05-12 10:36:30,848 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 116 selfloop transitions, 40 changer transitions 0/175 dead transitions. [2024-05-12 10:36:30,848 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 175 transitions, 1728 flow [2024-05-12 10:36:30,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:36:30,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:36:30,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 172 transitions. [2024-05-12 10:36:30,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6231884057971014 [2024-05-12 10:36:30,850 INFO L175 Difference]: Start difference. First operand has 120 places, 145 transitions, 1252 flow. Second operand 6 states and 172 transitions. [2024-05-12 10:36:30,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 175 transitions, 1728 flow [2024-05-12 10:36:30,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 175 transitions, 1658 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-05-12 10:36:30,916 INFO L231 Difference]: Finished difference. Result has 123 places, 149 transitions, 1316 flow [2024-05-12 10:36:30,917 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1182, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1316, PETRI_PLACES=123, PETRI_TRANSITIONS=149} [2024-05-12 10:36:30,917 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 73 predicate places. [2024-05-12 10:36:30,917 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 149 transitions, 1316 flow [2024-05-12 10:36:30,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:30,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:30,917 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:36:30,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-05-12 10:36:30,918 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:36:30,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:30,918 INFO L85 PathProgramCache]: Analyzing trace with hash -2014971880, now seen corresponding path program 1 times [2024-05-12 10:36:30,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:30,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093515377] [2024-05-12 10:36:30,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:30,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:30,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:31,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:36:31,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:31,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093515377] [2024-05-12 10:36:31,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093515377] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:31,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:31,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:36:31,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594182630] [2024-05-12 10:36:31,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:31,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:36:31,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:31,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:36:31,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:36:31,206 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:36:31,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 149 transitions, 1316 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:31,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:31,207 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:36:31,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:31,601 INFO L124 PetriNetUnfolderBase]: 2939/4784 cut-off events. [2024-05-12 10:36:31,602 INFO L125 PetriNetUnfolderBase]: For 38784/38794 co-relation queries the response was YES. [2024-05-12 10:36:31,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22520 conditions, 4784 events. 2939/4784 cut-off events. For 38784/38794 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 30592 event pairs, 882 based on Foata normal form. 1/4740 useless extension candidates. Maximal degree in co-relation 22465. Up to 4251 conditions per place. [2024-05-12 10:36:31,637 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 155 selfloop transitions, 22 changer transitions 0/191 dead transitions. [2024-05-12 10:36:31,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 191 transitions, 2000 flow [2024-05-12 10:36:31,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:36:31,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:36:31,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 167 transitions. [2024-05-12 10:36:31,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.605072463768116 [2024-05-12 10:36:31,638 INFO L175 Difference]: Start difference. First operand has 123 places, 149 transitions, 1316 flow. Second operand 6 states and 167 transitions. [2024-05-12 10:36:31,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 191 transitions, 2000 flow [2024-05-12 10:36:31,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 191 transitions, 1890 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-05-12 10:36:31,757 INFO L231 Difference]: Finished difference. Result has 127 places, 163 transitions, 1447 flow [2024-05-12 10:36:31,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1214, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1447, PETRI_PLACES=127, PETRI_TRANSITIONS=163} [2024-05-12 10:36:31,757 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 77 predicate places. [2024-05-12 10:36:31,757 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 163 transitions, 1447 flow [2024-05-12 10:36:31,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:31,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:31,758 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:36:31,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-05-12 10:36:31,758 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:36:31,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:31,758 INFO L85 PathProgramCache]: Analyzing trace with hash 85110074, now seen corresponding path program 2 times [2024-05-12 10:36:31,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:31,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390902114] [2024-05-12 10:36:31,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:31,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:31,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:32,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:36:32,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:32,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390902114] [2024-05-12 10:36:32,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390902114] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:32,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:32,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:36:32,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993446754] [2024-05-12 10:36:32,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:32,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:36:32,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:32,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:36:32,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:36:32,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:36:32,073 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 163 transitions, 1447 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 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) [2024-05-12 10:36:32,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:32,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:36:32,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:32,505 INFO L124 PetriNetUnfolderBase]: 2936/4763 cut-off events. [2024-05-12 10:36:32,505 INFO L125 PetriNetUnfolderBase]: For 41718/41728 co-relation queries the response was YES. [2024-05-12 10:36:32,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22876 conditions, 4763 events. 2936/4763 cut-off events. For 41718/41728 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 30428 event pairs, 877 based on Foata normal form. 1/4721 useless extension candidates. Maximal degree in co-relation 22818. Up to 4201 conditions per place. [2024-05-12 10:36:32,538 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 162 selfloop transitions, 31 changer transitions 0/207 dead transitions. [2024-05-12 10:36:32,538 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 207 transitions, 2143 flow [2024-05-12 10:36:32,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:36:32,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:36:32,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 189 transitions. [2024-05-12 10:36:32,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5869565217391305 [2024-05-12 10:36:32,539 INFO L175 Difference]: Start difference. First operand has 127 places, 163 transitions, 1447 flow. Second operand 7 states and 189 transitions. [2024-05-12 10:36:32,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 207 transitions, 2143 flow [2024-05-12 10:36:32,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 207 transitions, 2087 flow, removed 22 selfloop flow, removed 2 redundant places. [2024-05-12 10:36:32,625 INFO L231 Difference]: Finished difference. Result has 134 places, 174 transitions, 1596 flow [2024-05-12 10:36:32,625 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1397, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1596, PETRI_PLACES=134, PETRI_TRANSITIONS=174} [2024-05-12 10:36:32,626 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 84 predicate places. [2024-05-12 10:36:32,626 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 174 transitions, 1596 flow [2024-05-12 10:36:32,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 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) [2024-05-12 10:36:32,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:32,626 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:36:32,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-05-12 10:36:32,627 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:36:32,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:32,627 INFO L85 PathProgramCache]: Analyzing trace with hash 85109888, now seen corresponding path program 2 times [2024-05-12 10:36:32,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:32,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783403322] [2024-05-12 10:36:32,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:32,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:32,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:32,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:36:32,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:32,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783403322] [2024-05-12 10:36:32,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783403322] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:32,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:32,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:36:32,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527311454] [2024-05-12 10:36:32,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:32,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:36:32,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:32,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:36:32,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:36:32,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 10:36:32,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 174 transitions, 1596 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:32,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:32,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 10:36:32,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:33,556 INFO L124 PetriNetUnfolderBase]: 2995/4912 cut-off events. [2024-05-12 10:36:33,556 INFO L125 PetriNetUnfolderBase]: For 46354/46368 co-relation queries the response was YES. [2024-05-12 10:36:33,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24147 conditions, 4912 events. 2995/4912 cut-off events. For 46354/46368 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 31782 event pairs, 578 based on Foata normal form. 16/4914 useless extension candidates. Maximal degree in co-relation 24086. Up to 4073 conditions per place. [2024-05-12 10:36:33,596 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 129 selfloop transitions, 48 changer transitions 0/202 dead transitions. [2024-05-12 10:36:33,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 202 transitions, 2032 flow [2024-05-12 10:36:33,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:36:33,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:36:33,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 195 transitions. [2024-05-12 10:36:33,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6055900621118012 [2024-05-12 10:36:33,612 INFO L175 Difference]: Start difference. First operand has 134 places, 174 transitions, 1596 flow. Second operand 7 states and 195 transitions. [2024-05-12 10:36:33,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 202 transitions, 2032 flow [2024-05-12 10:36:33,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 202 transitions, 1963 flow, removed 26 selfloop flow, removed 2 redundant places. [2024-05-12 10:36:33,719 INFO L231 Difference]: Finished difference. Result has 139 places, 174 transitions, 1632 flow [2024-05-12 10:36:33,719 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1527, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1632, PETRI_PLACES=139, PETRI_TRANSITIONS=174} [2024-05-12 10:36:33,719 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 89 predicate places. [2024-05-12 10:36:33,719 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 174 transitions, 1632 flow [2024-05-12 10:36:33,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:33,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:33,720 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:36:33,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-05-12 10:36:33,720 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:36:33,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:33,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1478503112, now seen corresponding path program 3 times [2024-05-12 10:36:33,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:33,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346247362] [2024-05-12 10:36:33,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:33,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:33,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:33,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:36:33,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:33,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346247362] [2024-05-12 10:36:33,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346247362] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:33,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:33,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:36:33,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983626646] [2024-05-12 10:36:33,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:33,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:36:33,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:33,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:36:33,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:36:33,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:36:33,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 174 transitions, 1632 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:33,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:33,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:36:33,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:34,439 INFO L124 PetriNetUnfolderBase]: 2924/4758 cut-off events. [2024-05-12 10:36:34,439 INFO L125 PetriNetUnfolderBase]: For 47806/47816 co-relation queries the response was YES. [2024-05-12 10:36:34,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23774 conditions, 4758 events. 2924/4758 cut-off events. For 47806/47816 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 30409 event pairs, 882 based on Foata normal form. 1/4714 useless extension candidates. Maximal degree in co-relation 23711. Up to 4233 conditions per place. [2024-05-12 10:36:34,471 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 165 selfloop transitions, 22 changer transitions 0/201 dead transitions. [2024-05-12 10:36:34,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 201 transitions, 2141 flow [2024-05-12 10:36:34,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:36:34,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:36:34,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-05-12 10:36:34,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5683229813664596 [2024-05-12 10:36:34,472 INFO L175 Difference]: Start difference. First operand has 139 places, 174 transitions, 1632 flow. Second operand 7 states and 183 transitions. [2024-05-12 10:36:34,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 201 transitions, 2141 flow [2024-05-12 10:36:34,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 201 transitions, 2000 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-05-12 10:36:34,619 INFO L231 Difference]: Finished difference. Result has 141 places, 175 transitions, 1566 flow [2024-05-12 10:36:34,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1494, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1566, PETRI_PLACES=141, PETRI_TRANSITIONS=175} [2024-05-12 10:36:34,620 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 91 predicate places. [2024-05-12 10:36:34,620 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 175 transitions, 1566 flow [2024-05-12 10:36:34,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:34,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:34,620 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:36:34,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-05-12 10:36:34,621 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:36:34,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:34,621 INFO L85 PathProgramCache]: Analyzing trace with hash -2014725802, now seen corresponding path program 1 times [2024-05-12 10:36:34,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:34,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153458410] [2024-05-12 10:36:34,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:34,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:34,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:34,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:36:34,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:34,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153458410] [2024-05-12 10:36:34,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153458410] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:34,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:34,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:36:34,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944811238] [2024-05-12 10:36:34,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:34,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:36:34,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:34,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:36:34,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:36:34,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 10:36:34,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 175 transitions, 1566 flow. Second operand has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:34,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:34,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 10:36:34,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:35,297 INFO L124 PetriNetUnfolderBase]: 2733/4498 cut-off events. [2024-05-12 10:36:35,298 INFO L125 PetriNetUnfolderBase]: For 48212/48270 co-relation queries the response was YES. [2024-05-12 10:36:35,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22309 conditions, 4498 events. 2733/4498 cut-off events. For 48212/48270 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 29009 event pairs, 1006 based on Foata normal form. 6/4392 useless extension candidates. Maximal degree in co-relation 22244. Up to 3930 conditions per place. [2024-05-12 10:36:35,330 INFO L140 encePairwiseOnDemand]: 40/46 looper letters, 162 selfloop transitions, 9 changer transitions 0/194 dead transitions. [2024-05-12 10:36:35,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 194 transitions, 1980 flow [2024-05-12 10:36:35,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-05-12 10:36:35,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-05-12 10:36:35,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 136 transitions. [2024-05-12 10:36:35,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.591304347826087 [2024-05-12 10:36:35,331 INFO L175 Difference]: Start difference. First operand has 141 places, 175 transitions, 1566 flow. Second operand 5 states and 136 transitions. [2024-05-12 10:36:35,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 194 transitions, 1980 flow [2024-05-12 10:36:35,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 194 transitions, 1942 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-05-12 10:36:35,413 INFO L231 Difference]: Finished difference. Result has 143 places, 177 transitions, 1577 flow [2024-05-12 10:36:35,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1528, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1577, PETRI_PLACES=143, PETRI_TRANSITIONS=177} [2024-05-12 10:36:35,414 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 93 predicate places. [2024-05-12 10:36:35,414 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 177 transitions, 1577 flow [2024-05-12 10:36:35,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:35,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:35,414 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:36:35,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-05-12 10:36:35,414 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:36:35,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:35,415 INFO L85 PathProgramCache]: Analyzing trace with hash -1364893732, now seen corresponding path program 1 times [2024-05-12 10:36:35,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:35,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499605554] [2024-05-12 10:36:35,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:35,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:35,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:35,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:36:35,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:35,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499605554] [2024-05-12 10:36:35,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499605554] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:35,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:35,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:36:35,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602924654] [2024-05-12 10:36:35,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:35,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:36:35,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:35,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:36:35,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:36:35,686 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:36:35,686 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 177 transitions, 1577 flow. Second operand has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 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) [2024-05-12 10:36:35,686 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:35,687 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:36:35,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:36,171 INFO L124 PetriNetUnfolderBase]: 2930/4777 cut-off events. [2024-05-12 10:36:36,171 INFO L125 PetriNetUnfolderBase]: For 50874/50884 co-relation queries the response was YES. [2024-05-12 10:36:36,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23689 conditions, 4777 events. 2930/4777 cut-off events. For 50874/50884 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 30573 event pairs, 882 based on Foata normal form. 1/4732 useless extension candidates. Maximal degree in co-relation 23623. Up to 4238 conditions per place. [2024-05-12 10:36:36,205 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 167 selfloop transitions, 25 changer transitions 0/206 dead transitions. [2024-05-12 10:36:36,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 206 transitions, 2120 flow [2024-05-12 10:36:36,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:36:36,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:36:36,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 166 transitions. [2024-05-12 10:36:36,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6014492753623188 [2024-05-12 10:36:36,207 INFO L175 Difference]: Start difference. First operand has 143 places, 177 transitions, 1577 flow. Second operand 6 states and 166 transitions. [2024-05-12 10:36:36,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 206 transitions, 2120 flow [2024-05-12 10:36:36,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 206 transitions, 2087 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-05-12 10:36:36,308 INFO L231 Difference]: Finished difference. Result has 146 places, 180 transitions, 1631 flow [2024-05-12 10:36:36,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1544, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1631, PETRI_PLACES=146, PETRI_TRANSITIONS=180} [2024-05-12 10:36:36,308 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 96 predicate places. [2024-05-12 10:36:36,308 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 180 transitions, 1631 flow [2024-05-12 10:36:36,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 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) [2024-05-12 10:36:36,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:36,309 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:36:36,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-05-12 10:36:36,309 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:36:36,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:36,309 INFO L85 PathProgramCache]: Analyzing trace with hash 718353634, now seen corresponding path program 2 times [2024-05-12 10:36:36,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:36,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973568463] [2024-05-12 10:36:36,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:36,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:36,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:36,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:36:36,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:36,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973568463] [2024-05-12 10:36:36,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973568463] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:36,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:36,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:36:36,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844507338] [2024-05-12 10:36:36,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:36,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:36:36,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:36,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:36:36,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:36:36,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:36:36,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 180 transitions, 1631 flow. Second operand has 8 states, 8 states have (on average 18.0) internal successors, (144), 8 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) [2024-05-12 10:36:36,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:36,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:36:36,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:37,099 INFO L124 PetriNetUnfolderBase]: 2941/4777 cut-off events. [2024-05-12 10:36:37,099 INFO L125 PetriNetUnfolderBase]: For 53174/53184 co-relation queries the response was YES. [2024-05-12 10:36:37,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23882 conditions, 4777 events. 2941/4777 cut-off events. For 53174/53184 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 30500 event pairs, 679 based on Foata normal form. 1/4731 useless extension candidates. Maximal degree in co-relation 23815. Up to 4206 conditions per place. [2024-05-12 10:36:37,176 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 163 selfloop transitions, 38 changer transitions 0/215 dead transitions. [2024-05-12 10:36:37,177 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 215 transitions, 2223 flow [2024-05-12 10:36:37,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:36:37,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:36:37,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 188 transitions. [2024-05-12 10:36:37,180 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5838509316770186 [2024-05-12 10:36:37,180 INFO L175 Difference]: Start difference. First operand has 146 places, 180 transitions, 1631 flow. Second operand 7 states and 188 transitions. [2024-05-12 10:36:37,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 215 transitions, 2223 flow [2024-05-12 10:36:37,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 215 transitions, 2171 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-05-12 10:36:37,297 INFO L231 Difference]: Finished difference. Result has 150 places, 185 transitions, 1715 flow [2024-05-12 10:36:37,298 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1579, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1715, PETRI_PLACES=150, PETRI_TRANSITIONS=185} [2024-05-12 10:36:37,298 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 100 predicate places. [2024-05-12 10:36:37,298 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 185 transitions, 1715 flow [2024-05-12 10:36:37,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.0) internal successors, (144), 8 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) [2024-05-12 10:36:37,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:37,298 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:36:37,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-05-12 10:36:37,299 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:36:37,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:37,299 INFO L85 PathProgramCache]: Analyzing trace with hash -1364888152, now seen corresponding path program 3 times [2024-05-12 10:36:37,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:37,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956723822] [2024-05-12 10:36:37,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:37,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:37,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:37,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:36:37,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:37,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956723822] [2024-05-12 10:36:37,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956723822] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:37,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:37,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-05-12 10:36:37,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270958399] [2024-05-12 10:36:37,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:37,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-05-12 10:36:37,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:37,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-05-12 10:36:37,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-05-12 10:36:37,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:36:37,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 185 transitions, 1715 flow. Second operand has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 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) [2024-05-12 10:36:37,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:37,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:36:37,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:38,076 INFO L124 PetriNetUnfolderBase]: 2938/4785 cut-off events. [2024-05-12 10:36:38,077 INFO L125 PetriNetUnfolderBase]: For 55292/55302 co-relation queries the response was YES. [2024-05-12 10:36:38,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24016 conditions, 4785 events. 2938/4785 cut-off events. For 55292/55302 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 30676 event pairs, 882 based on Foata normal form. 1/4741 useless extension candidates. Maximal degree in co-relation 23947. Up to 4250 conditions per place. [2024-05-12 10:36:38,113 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 170 selfloop transitions, 26 changer transitions 0/210 dead transitions. [2024-05-12 10:36:38,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 210 transitions, 2177 flow [2024-05-12 10:36:38,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:36:38,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:36:38,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-05-12 10:36:38,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5652173913043478 [2024-05-12 10:36:38,114 INFO L175 Difference]: Start difference. First operand has 150 places, 185 transitions, 1715 flow. Second operand 7 states and 182 transitions. [2024-05-12 10:36:38,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 210 transitions, 2177 flow [2024-05-12 10:36:38,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 210 transitions, 2079 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-05-12 10:36:38,270 INFO L231 Difference]: Finished difference. Result has 153 places, 185 transitions, 1676 flow [2024-05-12 10:36:38,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1617, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1676, PETRI_PLACES=153, PETRI_TRANSITIONS=185} [2024-05-12 10:36:38,270 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 103 predicate places. [2024-05-12 10:36:38,270 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 185 transitions, 1676 flow [2024-05-12 10:36:38,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 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) [2024-05-12 10:36:38,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:38,271 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:36:38,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-05-12 10:36:38,271 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:36:38,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:38,271 INFO L85 PathProgramCache]: Analyzing trace with hash -1656559648, now seen corresponding path program 4 times [2024-05-12 10:36:38,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:38,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527619725] [2024-05-12 10:36:38,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:38,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:38,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:38,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:36:38,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:38,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527619725] [2024-05-12 10:36:38,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527619725] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:38,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:38,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:36:38,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527632810] [2024-05-12 10:36:38,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:38,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:36:38,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:38,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:36:38,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:36:38,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:36:38,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 185 transitions, 1676 flow. Second operand has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:38,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:38,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:36:38,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:39,110 INFO L124 PetriNetUnfolderBase]: 2949/4808 cut-off events. [2024-05-12 10:36:39,111 INFO L125 PetriNetUnfolderBase]: For 57669/57679 co-relation queries the response was YES. [2024-05-12 10:36:39,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24106 conditions, 4808 events. 2949/4808 cut-off events. For 57669/57679 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 30922 event pairs, 883 based on Foata normal form. 1/4763 useless extension candidates. Maximal degree in co-relation 24036. Up to 4215 conditions per place. [2024-05-12 10:36:39,148 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 166 selfloop transitions, 41 changer transitions 0/221 dead transitions. [2024-05-12 10:36:39,148 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 221 transitions, 2275 flow [2024-05-12 10:36:39,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:36:39,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:36:39,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 212 transitions. [2024-05-12 10:36:39,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5760869565217391 [2024-05-12 10:36:39,150 INFO L175 Difference]: Start difference. First operand has 153 places, 185 transitions, 1676 flow. Second operand 8 states and 212 transitions. [2024-05-12 10:36:39,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 221 transitions, 2275 flow [2024-05-12 10:36:39,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 221 transitions, 2217 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-05-12 10:36:39,283 INFO L231 Difference]: Finished difference. Result has 156 places, 189 transitions, 1754 flow [2024-05-12 10:36:39,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1618, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1754, PETRI_PLACES=156, PETRI_TRANSITIONS=189} [2024-05-12 10:36:39,284 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 106 predicate places. [2024-05-12 10:36:39,284 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 189 transitions, 1754 flow [2024-05-12 10:36:39,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:39,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:39,284 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:36:39,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-05-12 10:36:39,285 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:36:39,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:39,285 INFO L85 PathProgramCache]: Analyzing trace with hash -1656554068, now seen corresponding path program 5 times [2024-05-12 10:36:39,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:39,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516069127] [2024-05-12 10:36:39,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:39,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:39,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:39,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:36:39,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:39,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516069127] [2024-05-12 10:36:39,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516069127] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:39,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:39,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:36:39,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717209518] [2024-05-12 10:36:39,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:39,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:36:39,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:39,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:36:39,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:36:39,673 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:36:39,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 189 transitions, 1754 flow. Second operand has 8 states, 8 states have (on average 18.0) internal successors, (144), 8 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) [2024-05-12 10:36:39,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:39,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:36:39,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:40,163 INFO L124 PetriNetUnfolderBase]: 2946/4802 cut-off events. [2024-05-12 10:36:40,163 INFO L125 PetriNetUnfolderBase]: For 59796/59806 co-relation queries the response was YES. [2024-05-12 10:36:40,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24249 conditions, 4802 events. 2946/4802 cut-off events. For 59796/59806 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 30820 event pairs, 882 based on Foata normal form. 1/4757 useless extension candidates. Maximal degree in co-relation 24177. Up to 4212 conditions per place. [2024-05-12 10:36:40,200 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 170 selfloop transitions, 43 changer transitions 0/227 dead transitions. [2024-05-12 10:36:40,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 227 transitions, 2290 flow [2024-05-12 10:36:40,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 10:36:40,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 10:36:40,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 253 transitions. [2024-05-12 10:36:40,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-05-12 10:36:40,202 INFO L175 Difference]: Start difference. First operand has 156 places, 189 transitions, 1754 flow. Second operand 10 states and 253 transitions. [2024-05-12 10:36:40,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 227 transitions, 2290 flow [2024-05-12 10:36:40,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 227 transitions, 2158 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-05-12 10:36:40,339 INFO L231 Difference]: Finished difference. Result has 160 places, 190 transitions, 1726 flow [2024-05-12 10:36:40,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1628, PETRI_DIFFERENCE_MINUEND_PLACES=150, 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=10, PETRI_FLOW=1726, PETRI_PLACES=160, PETRI_TRANSITIONS=190} [2024-05-12 10:36:40,339 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 110 predicate places. [2024-05-12 10:36:40,340 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 190 transitions, 1726 flow [2024-05-12 10:36:40,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.0) internal successors, (144), 8 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) [2024-05-12 10:36:40,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:40,340 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:36:40,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-05-12 10:36:40,340 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:36:40,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:40,341 INFO L85 PathProgramCache]: Analyzing trace with hash -1328782493, now seen corresponding path program 1 times [2024-05-12 10:36:40,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:40,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818040331] [2024-05-12 10:36:40,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:40,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:40,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:40,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:36:40,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:40,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818040331] [2024-05-12 10:36:40,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818040331] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:40,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:40,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:36:40,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940302494] [2024-05-12 10:36:40,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:40,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:36:40,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:40,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:36:40,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:36:40,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:36:40,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 190 transitions, 1726 flow. Second operand has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:40,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:40,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:36:40,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:41,249 INFO L124 PetriNetUnfolderBase]: 2957/4792 cut-off events. [2024-05-12 10:36:41,250 INFO L125 PetriNetUnfolderBase]: For 62296/62300 co-relation queries the response was YES. [2024-05-12 10:36:41,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24363 conditions, 4792 events. 2957/4792 cut-off events. For 62296/62300 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 30576 event pairs, 579 based on Foata normal form. 1/4749 useless extension candidates. Maximal degree in co-relation 24290. Up to 3786 conditions per place. [2024-05-12 10:36:41,283 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 147 selfloop transitions, 71 changer transitions 0/232 dead transitions. [2024-05-12 10:36:41,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 232 transitions, 2538 flow [2024-05-12 10:36:41,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:36:41,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:36:41,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 212 transitions. [2024-05-12 10:36:41,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5760869565217391 [2024-05-12 10:36:41,284 INFO L175 Difference]: Start difference. First operand has 160 places, 190 transitions, 1726 flow. Second operand 8 states and 212 transitions. [2024-05-12 10:36:41,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 232 transitions, 2538 flow [2024-05-12 10:36:41,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 232 transitions, 2450 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-05-12 10:36:41,418 INFO L231 Difference]: Finished difference. Result has 161 places, 199 transitions, 1989 flow [2024-05-12 10:36:41,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1638, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1989, PETRI_PLACES=161, PETRI_TRANSITIONS=199} [2024-05-12 10:36:41,419 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 111 predicate places. [2024-05-12 10:36:41,419 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 199 transitions, 1989 flow [2024-05-12 10:36:41,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:41,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:41,420 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:36:41,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-05-12 10:36:41,420 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:36:41,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:41,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1717374553, now seen corresponding path program 1 times [2024-05-12 10:36:41,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:41,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335508343] [2024-05-12 10:36:41,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:41,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:41,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:41,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:36:41,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:41,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335508343] [2024-05-12 10:36:41,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335508343] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:41,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:41,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:36:41,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307517416] [2024-05-12 10:36:41,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:41,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:36:41,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:41,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:36:41,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:36:41,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:36:41,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 199 transitions, 1989 flow. Second operand has 8 states, 8 states have (on average 18.0) internal successors, (144), 8 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) [2024-05-12 10:36:41,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:41,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:36:41,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:42,282 INFO L124 PetriNetUnfolderBase]: 3005/4896 cut-off events. [2024-05-12 10:36:42,282 INFO L125 PetriNetUnfolderBase]: For 72986/72990 co-relation queries the response was YES. [2024-05-12 10:36:42,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26423 conditions, 4896 events. 3005/4896 cut-off events. For 72986/72990 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 31608 event pairs, 549 based on Foata normal form. 2/4858 useless extension candidates. Maximal degree in co-relation 26347. Up to 3970 conditions per place. [2024-05-12 10:36:42,322 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 167 selfloop transitions, 65 changer transitions 0/246 dead transitions. [2024-05-12 10:36:42,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 246 transitions, 2911 flow [2024-05-12 10:36:42,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:36:42,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:36:42,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 214 transitions. [2024-05-12 10:36:42,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5815217391304348 [2024-05-12 10:36:42,324 INFO L175 Difference]: Start difference. First operand has 161 places, 199 transitions, 1989 flow. Second operand 8 states and 214 transitions. [2024-05-12 10:36:42,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 246 transitions, 2911 flow [2024-05-12 10:36:42,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 246 transitions, 2814 flow, removed 32 selfloop flow, removed 3 redundant places. [2024-05-12 10:36:42,469 INFO L231 Difference]: Finished difference. Result has 168 places, 214 transitions, 2315 flow [2024-05-12 10:36:42,469 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=1894, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2315, PETRI_PLACES=168, PETRI_TRANSITIONS=214} [2024-05-12 10:36:42,469 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 118 predicate places. [2024-05-12 10:36:42,469 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 214 transitions, 2315 flow [2024-05-12 10:36:42,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.0) internal successors, (144), 8 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) [2024-05-12 10:36:42,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:42,470 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:36:42,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-05-12 10:36:42,470 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:36:42,470 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:42,470 INFO L85 PathProgramCache]: Analyzing trace with hash -2136984913, now seen corresponding path program 2 times [2024-05-12 10:36:42,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:42,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693863537] [2024-05-12 10:36:42,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:42,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:42,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:42,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:36:42,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:42,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693863537] [2024-05-12 10:36:42,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693863537] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:42,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:42,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:36:42,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529951918] [2024-05-12 10:36:42,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:42,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:36:42,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:42,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:36:42,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:36:42,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:36:42,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 214 transitions, 2315 flow. Second operand has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:42,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:42,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:36:42,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:43,403 INFO L124 PetriNetUnfolderBase]: 3002/4856 cut-off events. [2024-05-12 10:36:43,403 INFO L125 PetriNetUnfolderBase]: For 78914/78920 co-relation queries the response was YES. [2024-05-12 10:36:43,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27794 conditions, 4856 events. 3002/4856 cut-off events. For 78914/78920 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 31028 event pairs, 551 based on Foata normal form. 1/4827 useless extension candidates. Maximal degree in co-relation 27714. Up to 3823 conditions per place. [2024-05-12 10:36:43,443 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 156 selfloop transitions, 73 changer transitions 0/243 dead transitions. [2024-05-12 10:36:43,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 243 transitions, 2929 flow [2024-05-12 10:36:43,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:36:43,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:36:43,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 209 transitions. [2024-05-12 10:36:43,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5679347826086957 [2024-05-12 10:36:43,445 INFO L175 Difference]: Start difference. First operand has 168 places, 214 transitions, 2315 flow. Second operand 8 states and 209 transitions. [2024-05-12 10:36:43,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 243 transitions, 2929 flow [2024-05-12 10:36:43,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 243 transitions, 2794 flow, removed 48 selfloop flow, removed 5 redundant places. [2024-05-12 10:36:43,687 INFO L231 Difference]: Finished difference. Result has 171 places, 214 transitions, 2334 flow [2024-05-12 10:36:43,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2182, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2334, PETRI_PLACES=171, PETRI_TRANSITIONS=214} [2024-05-12 10:36:43,688 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 121 predicate places. [2024-05-12 10:36:43,688 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 214 transitions, 2334 flow [2024-05-12 10:36:43,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:43,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:43,688 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:36:43,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-05-12 10:36:43,689 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:36:43,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:43,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1663435263, now seen corresponding path program 2 times [2024-05-12 10:36:43,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:43,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634379009] [2024-05-12 10:36:43,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:43,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:43,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:43,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:36:43,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:43,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634379009] [2024-05-12 10:36:43,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634379009] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:43,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:43,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:36:43,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200428295] [2024-05-12 10:36:43,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:43,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:36:43,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:43,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:36:43,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:36:44,003 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:36:44,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 214 transitions, 2334 flow. Second operand has 8 states, 8 states have (on average 18.0) internal successors, (144), 8 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) [2024-05-12 10:36:44,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:44,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:36:44,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:44,696 INFO L124 PetriNetUnfolderBase]: 3128/5063 cut-off events. [2024-05-12 10:36:44,696 INFO L125 PetriNetUnfolderBase]: For 84333/84339 co-relation queries the response was YES. [2024-05-12 10:36:44,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29457 conditions, 5063 events. 3128/5063 cut-off events. For 84333/84339 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 32544 event pairs, 551 based on Foata normal form. 2/5038 useless extension candidates. Maximal degree in co-relation 29377. Up to 3909 conditions per place. [2024-05-12 10:36:44,732 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 150 selfloop transitions, 112 changer transitions 0/276 dead transitions. [2024-05-12 10:36:44,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 276 transitions, 3439 flow [2024-05-12 10:36:44,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 10:36:44,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 10:36:44,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 245 transitions. [2024-05-12 10:36:44,733 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5917874396135265 [2024-05-12 10:36:44,733 INFO L175 Difference]: Start difference. First operand has 171 places, 214 transitions, 2334 flow. Second operand 9 states and 245 transitions. [2024-05-12 10:36:44,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 276 transitions, 3439 flow [2024-05-12 10:36:44,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 276 transitions, 3277 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-05-12 10:36:44,970 INFO L231 Difference]: Finished difference. Result has 175 places, 241 transitions, 2889 flow [2024-05-12 10:36:44,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2172, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2889, PETRI_PLACES=175, PETRI_TRANSITIONS=241} [2024-05-12 10:36:44,971 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 125 predicate places. [2024-05-12 10:36:44,971 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 241 transitions, 2889 flow [2024-05-12 10:36:44,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.0) internal successors, (144), 8 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) [2024-05-12 10:36:44,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:44,971 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:36:44,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-05-12 10:36:44,971 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:36:44,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:44,972 INFO L85 PathProgramCache]: Analyzing trace with hash 1717381063, now seen corresponding path program 3 times [2024-05-12 10:36:44,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:44,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723380669] [2024-05-12 10:36:44,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:44,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:44,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:45,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:36:45,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:45,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723380669] [2024-05-12 10:36:45,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723380669] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:45,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:45,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:36:45,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602181729] [2024-05-12 10:36:45,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:45,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:36:45,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:45,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:36:45,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:36:45,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:36:45,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 241 transitions, 2889 flow. Second operand has 8 states, 8 states have (on average 18.0) internal successors, (144), 8 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) [2024-05-12 10:36:45,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:45,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:36:45,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:45,906 INFO L124 PetriNetUnfolderBase]: 3119/5075 cut-off events. [2024-05-12 10:36:45,907 INFO L125 PetriNetUnfolderBase]: For 91783/91791 co-relation queries the response was YES. [2024-05-12 10:36:45,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30638 conditions, 5075 events. 3119/5075 cut-off events. For 91783/91791 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 32850 event pairs, 562 based on Foata normal form. 3/5026 useless extension candidates. Maximal degree in co-relation 30556. Up to 4098 conditions per place. [2024-05-12 10:36:45,951 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 176 selfloop transitions, 78 changer transitions 0/268 dead transitions. [2024-05-12 10:36:45,951 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 268 transitions, 3568 flow [2024-05-12 10:36:45,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:36:45,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:36:45,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 209 transitions. [2024-05-12 10:36:45,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5679347826086957 [2024-05-12 10:36:45,955 INFO L175 Difference]: Start difference. First operand has 175 places, 241 transitions, 2889 flow. Second operand 8 states and 209 transitions. [2024-05-12 10:36:45,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 268 transitions, 3568 flow [2024-05-12 10:36:46,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 268 transitions, 3342 flow, removed 86 selfloop flow, removed 3 redundant places. [2024-05-12 10:36:46,200 INFO L231 Difference]: Finished difference. Result has 181 places, 242 transitions, 2886 flow [2024-05-12 10:36:46,200 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2670, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2886, PETRI_PLACES=181, PETRI_TRANSITIONS=242} [2024-05-12 10:36:46,202 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 131 predicate places. [2024-05-12 10:36:46,202 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 242 transitions, 2886 flow [2024-05-12 10:36:46,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.0) internal successors, (144), 8 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) [2024-05-12 10:36:46,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:46,203 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:36:46,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-05-12 10:36:46,203 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:36:46,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:46,203 INFO L85 PathProgramCache]: Analyzing trace with hash -1696097861, now seen corresponding path program 1 times [2024-05-12 10:36:46,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:46,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525107876] [2024-05-12 10:36:46,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:46,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:46,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:46,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:36:46,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:46,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525107876] [2024-05-12 10:36:46,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525107876] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:46,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:46,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:36:46,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512647350] [2024-05-12 10:36:46,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:46,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:36:46,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:46,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:36:46,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:36:46,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 10:36:46,615 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 242 transitions, 2886 flow. Second operand has 8 states, 8 states have (on average 19.0) internal successors, (152), 8 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:46,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:46,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 10:36:46,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:47,274 INFO L124 PetriNetUnfolderBase]: 3001/4892 cut-off events. [2024-05-12 10:36:47,274 INFO L125 PetriNetUnfolderBase]: For 97173/97256 co-relation queries the response was YES. [2024-05-12 10:36:47,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30027 conditions, 4892 events. 3001/4892 cut-off events. For 97173/97256 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 31774 event pairs, 505 based on Foata normal form. 10/4812 useless extension candidates. Maximal degree in co-relation 29940. Up to 3970 conditions per place. [2024-05-12 10:36:47,326 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 194 selfloop transitions, 37 changer transitions 0/262 dead transitions. [2024-05-12 10:36:47,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 262 transitions, 3438 flow [2024-05-12 10:36:47,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:36:47,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:36:47,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 158 transitions. [2024-05-12 10:36:47,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.572463768115942 [2024-05-12 10:36:47,328 INFO L175 Difference]: Start difference. First operand has 181 places, 242 transitions, 2886 flow. Second operand 6 states and 158 transitions. [2024-05-12 10:36:47,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 262 transitions, 3438 flow [2024-05-12 10:36:47,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 262 transitions, 3308 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-05-12 10:36:47,609 INFO L231 Difference]: Finished difference. Result has 182 places, 243 transitions, 2864 flow [2024-05-12 10:36:47,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2756, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2864, PETRI_PLACES=182, PETRI_TRANSITIONS=243} [2024-05-12 10:36:47,614 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 132 predicate places. [2024-05-12 10:36:47,614 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 243 transitions, 2864 flow [2024-05-12 10:36:47,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.0) internal successors, (152), 8 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:47,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:47,615 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:36:47,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-05-12 10:36:47,615 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:36:47,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:47,616 INFO L85 PathProgramCache]: Analyzing trace with hash 637717567, now seen corresponding path program 4 times [2024-05-12 10:36:47,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:47,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990479681] [2024-05-12 10:36:47,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:47,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:47,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:47,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:36:47,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:47,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990479681] [2024-05-12 10:36:47,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990479681] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:47,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:47,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:36:47,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429931716] [2024-05-12 10:36:47,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:47,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:36:47,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:47,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:36:47,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:36:48,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:36:48,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 243 transitions, 2864 flow. Second operand has 8 states, 8 states have (on average 18.0) internal successors, (144), 8 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) [2024-05-12 10:36:48,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:48,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:36:48,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:48,679 INFO L124 PetriNetUnfolderBase]: 3139/5100 cut-off events. [2024-05-12 10:36:48,679 INFO L125 PetriNetUnfolderBase]: For 92937/92943 co-relation queries the response was YES. [2024-05-12 10:36:48,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30807 conditions, 5100 events. 3139/5100 cut-off events. For 92937/92943 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 33078 event pairs, 541 based on Foata normal form. 1/5053 useless extension candidates. Maximal degree in co-relation 30720. Up to 4264 conditions per place. [2024-05-12 10:36:48,728 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 214 selfloop transitions, 45 changer transitions 0/273 dead transitions. [2024-05-12 10:36:48,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 273 transitions, 3462 flow [2024-05-12 10:36:48,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:36:48,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:36:48,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 210 transitions. [2024-05-12 10:36:48,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5706521739130435 [2024-05-12 10:36:48,729 INFO L175 Difference]: Start difference. First operand has 182 places, 243 transitions, 2864 flow. Second operand 8 states and 210 transitions. [2024-05-12 10:36:48,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 273 transitions, 3462 flow [2024-05-12 10:36:48,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 273 transitions, 3380 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-05-12 10:36:48,988 INFO L231 Difference]: Finished difference. Result has 186 places, 243 transitions, 2878 flow [2024-05-12 10:36:48,988 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2782, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2878, PETRI_PLACES=186, PETRI_TRANSITIONS=243} [2024-05-12 10:36:48,988 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 136 predicate places. [2024-05-12 10:36:48,988 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 243 transitions, 2878 flow [2024-05-12 10:36:48,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.0) internal successors, (144), 8 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) [2024-05-12 10:36:48,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:48,989 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:36:48,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-05-12 10:36:48,989 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:36:48,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:48,989 INFO L85 PathProgramCache]: Analyzing trace with hash 638133277, now seen corresponding path program 5 times [2024-05-12 10:36:48,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:48,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783162948] [2024-05-12 10:36:48,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:48,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:48,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:49,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:36:49,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:49,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783162948] [2024-05-12 10:36:49,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783162948] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:49,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:49,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:36:49,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995977273] [2024-05-12 10:36:49,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:49,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:36:49,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:49,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:36:49,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:36:49,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:36:49,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 243 transitions, 2878 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 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) [2024-05-12 10:36:49,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:49,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:36:49,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:49,894 INFO L124 PetriNetUnfolderBase]: 3220/5195 cut-off events. [2024-05-12 10:36:49,894 INFO L125 PetriNetUnfolderBase]: For 99929/99935 co-relation queries the response was YES. [2024-05-12 10:36:49,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32075 conditions, 5195 events. 3220/5195 cut-off events. For 99929/99935 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 33522 event pairs, 562 based on Foata normal form. 1/5160 useless extension candidates. Maximal degree in co-relation 31987. Up to 4083 conditions per place. [2024-05-12 10:36:49,944 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 175 selfloop transitions, 99 changer transitions 0/288 dead transitions. [2024-05-12 10:36:49,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 288 transitions, 3930 flow [2024-05-12 10:36:49,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:36:49,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:36:49,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 197 transitions. [2024-05-12 10:36:49,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6118012422360248 [2024-05-12 10:36:49,949 INFO L175 Difference]: Start difference. First operand has 186 places, 243 transitions, 2878 flow. Second operand 7 states and 197 transitions. [2024-05-12 10:36:49,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 288 transitions, 3930 flow [2024-05-12 10:36:50,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 288 transitions, 3797 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-05-12 10:36:50,271 INFO L231 Difference]: Finished difference. Result has 187 places, 258 transitions, 3279 flow [2024-05-12 10:36:50,272 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=2745, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3279, PETRI_PLACES=187, PETRI_TRANSITIONS=258} [2024-05-12 10:36:50,272 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 137 predicate places. [2024-05-12 10:36:50,272 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 258 transitions, 3279 flow [2024-05-12 10:36:50,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 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) [2024-05-12 10:36:50,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:50,273 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:36:50,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-05-12 10:36:50,273 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:36:50,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:50,273 INFO L85 PathProgramCache]: Analyzing trace with hash 186424473, now seen corresponding path program 6 times [2024-05-12 10:36:50,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:50,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033191362] [2024-05-12 10:36:50,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:50,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:50,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:50,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:36:50,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:50,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033191362] [2024-05-12 10:36:50,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033191362] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:50,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:50,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:36:50,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060876961] [2024-05-12 10:36:50,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:50,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:36:50,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:50,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:36:50,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:36:50,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:36:50,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 258 transitions, 3279 flow. Second operand has 8 states, 8 states have (on average 18.0) internal successors, (144), 8 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) [2024-05-12 10:36:50,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:50,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:36:50,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:51,198 INFO L124 PetriNetUnfolderBase]: 3217/5191 cut-off events. [2024-05-12 10:36:51,198 INFO L125 PetriNetUnfolderBase]: For 108564/108570 co-relation queries the response was YES. [2024-05-12 10:36:51,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33178 conditions, 5191 events. 3217/5191 cut-off events. For 108564/108570 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 33522 event pairs, 562 based on Foata normal form. 1/5156 useless extension candidates. Maximal degree in co-relation 33089. Up to 3891 conditions per place. [2024-05-12 10:36:51,247 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 155 selfloop transitions, 128 changer transitions 0/297 dead transitions. [2024-05-12 10:36:51,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 297 transitions, 4214 flow [2024-05-12 10:36:51,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:36:51,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:36:51,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 221 transitions. [2024-05-12 10:36:51,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6005434782608695 [2024-05-12 10:36:51,248 INFO L175 Difference]: Start difference. First operand has 187 places, 258 transitions, 3279 flow. Second operand 8 states and 221 transitions. [2024-05-12 10:36:51,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 297 transitions, 4214 flow [2024-05-12 10:36:51,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 297 transitions, 4119 flow, removed 41 selfloop flow, removed 1 redundant places. [2024-05-12 10:36:51,591 INFO L231 Difference]: Finished difference. Result has 195 places, 265 transitions, 3660 flow [2024-05-12 10:36:51,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3188, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3660, PETRI_PLACES=195, PETRI_TRANSITIONS=265} [2024-05-12 10:36:51,592 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 145 predicate places. [2024-05-12 10:36:51,592 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 265 transitions, 3660 flow [2024-05-12 10:36:51,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.0) internal successors, (144), 8 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) [2024-05-12 10:36:51,593 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:51,593 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:36:51,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-05-12 10:36:51,593 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:36:51,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:51,593 INFO L85 PathProgramCache]: Analyzing trace with hash 864483029, now seen corresponding path program 7 times [2024-05-12 10:36:51,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:51,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61554637] [2024-05-12 10:36:51,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:51,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:51,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:51,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:36:51,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:51,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61554637] [2024-05-12 10:36:51,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61554637] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:51,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:51,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:36:51,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776531115] [2024-05-12 10:36:51,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:51,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:36:51,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:51,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:36:51,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:36:51,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:36:51,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 265 transitions, 3660 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 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) [2024-05-12 10:36:51,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:51,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:36:51,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:52,561 INFO L124 PetriNetUnfolderBase]: 3225/5201 cut-off events. [2024-05-12 10:36:52,562 INFO L125 PetriNetUnfolderBase]: For 118579/118585 co-relation queries the response was YES. [2024-05-12 10:36:52,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34695 conditions, 5201 events. 3225/5201 cut-off events. For 118579/118585 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 33566 event pairs, 529 based on Foata normal form. 2/5166 useless extension candidates. Maximal degree in co-relation 34602. Up to 4085 conditions per place. [2024-05-12 10:36:52,613 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 183 selfloop transitions, 103 changer transitions 0/300 dead transitions. [2024-05-12 10:36:52,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 300 transitions, 4526 flow [2024-05-12 10:36:52,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 10:36:52,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 10:36:52,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 240 transitions. [2024-05-12 10:36:52,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5797101449275363 [2024-05-12 10:36:52,615 INFO L175 Difference]: Start difference. First operand has 195 places, 265 transitions, 3660 flow. Second operand 9 states and 240 transitions. [2024-05-12 10:36:52,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 300 transitions, 4526 flow [2024-05-12 10:36:52,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 300 transitions, 4360 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-05-12 10:36:52,929 INFO L231 Difference]: Finished difference. Result has 200 places, 268 transitions, 3775 flow [2024-05-12 10:36:52,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3497, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3775, PETRI_PLACES=200, PETRI_TRANSITIONS=268} [2024-05-12 10:36:52,930 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 150 predicate places. [2024-05-12 10:36:52,930 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 268 transitions, 3775 flow [2024-05-12 10:36:52,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 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) [2024-05-12 10:36:52,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:52,932 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:36:52,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-05-12 10:36:52,932 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:36:52,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:52,933 INFO L85 PathProgramCache]: Analyzing trace with hash 870196949, now seen corresponding path program 8 times [2024-05-12 10:36:52,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:52,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960806376] [2024-05-12 10:36:52,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:52,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:52,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:53,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:36:53,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:53,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960806376] [2024-05-12 10:36:53,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960806376] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:53,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:53,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:36:53,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138534659] [2024-05-12 10:36:53,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:53,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:36:53,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:53,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:36:53,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:36:53,227 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:36:53,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 268 transitions, 3775 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 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) [2024-05-12 10:36:53,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:53,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:36:53,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:53,899 INFO L124 PetriNetUnfolderBase]: 3222/5197 cut-off events. [2024-05-12 10:36:53,899 INFO L125 PetriNetUnfolderBase]: For 119416/119422 co-relation queries the response was YES. [2024-05-12 10:36:53,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34948 conditions, 5197 events. 3222/5197 cut-off events. For 119416/119422 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 33602 event pairs, 529 based on Foata normal form. 1/5162 useless extension candidates. Maximal degree in co-relation 34853. Up to 4083 conditions per place. [2024-05-12 10:36:53,947 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 179 selfloop transitions, 103 changer transitions 0/296 dead transitions. [2024-05-12 10:36:53,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 296 transitions, 4485 flow [2024-05-12 10:36:53,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:36:53,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:36:53,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 215 transitions. [2024-05-12 10:36:53,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5842391304347826 [2024-05-12 10:36:53,949 INFO L175 Difference]: Start difference. First operand has 200 places, 268 transitions, 3775 flow. Second operand 8 states and 215 transitions. [2024-05-12 10:36:53,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 296 transitions, 4485 flow [2024-05-12 10:36:54,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 296 transitions, 4203 flow, removed 54 selfloop flow, removed 6 redundant places. [2024-05-12 10:36:54,302 INFO L231 Difference]: Finished difference. Result has 202 places, 268 transitions, 3705 flow [2024-05-12 10:36:54,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3493, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3705, PETRI_PLACES=202, PETRI_TRANSITIONS=268} [2024-05-12 10:36:54,303 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 152 predicate places. [2024-05-12 10:36:54,303 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 268 transitions, 3705 flow [2024-05-12 10:36:54,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 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) [2024-05-12 10:36:54,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:54,303 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:36:54,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-05-12 10:36:54,304 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:36:54,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:54,304 INFO L85 PathProgramCache]: Analyzing trace with hash -777064129, now seen corresponding path program 2 times [2024-05-12 10:36:54,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:54,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607413379] [2024-05-12 10:36:54,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:54,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:54,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:54,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:36:54,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:54,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607413379] [2024-05-12 10:36:54,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607413379] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:54,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:54,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:36:54,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458937067] [2024-05-12 10:36:54,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:54,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:36:54,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:54,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:36:54,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:36:54,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 10:36:54,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 268 transitions, 3705 flow. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:54,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:54,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 10:36:54,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:55,240 INFO L124 PetriNetUnfolderBase]: 3170/5152 cut-off events. [2024-05-12 10:36:55,240 INFO L125 PetriNetUnfolderBase]: For 129443/129506 co-relation queries the response was YES. [2024-05-12 10:36:55,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34603 conditions, 5152 events. 3170/5152 cut-off events. For 129443/129506 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 33745 event pairs, 518 based on Foata normal form. 10/5073 useless extension candidates. Maximal degree in co-relation 34508. Up to 4244 conditions per place. [2024-05-12 10:36:55,293 INFO L140 encePairwiseOnDemand]: 39/46 looper letters, 214 selfloop transitions, 37 changer transitions 0/291 dead transitions. [2024-05-12 10:36:55,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 291 transitions, 4311 flow [2024-05-12 10:36:55,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:36:55,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:36:55,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 163 transitions. [2024-05-12 10:36:55,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5905797101449275 [2024-05-12 10:36:55,294 INFO L175 Difference]: Start difference. First operand has 202 places, 268 transitions, 3705 flow. Second operand 6 states and 163 transitions. [2024-05-12 10:36:55,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 291 transitions, 4311 flow [2024-05-12 10:36:55,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 291 transitions, 4079 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-05-12 10:36:55,628 INFO L231 Difference]: Finished difference. Result has 202 places, 269 transitions, 3570 flow [2024-05-12 10:36:55,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3473, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3570, PETRI_PLACES=202, PETRI_TRANSITIONS=269} [2024-05-12 10:36:55,629 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 152 predicate places. [2024-05-12 10:36:55,629 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 269 transitions, 3570 flow [2024-05-12 10:36:55,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:55,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:55,630 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:36:55,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-05-12 10:36:55,630 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:36:55,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:55,630 INFO L85 PathProgramCache]: Analyzing trace with hash 878776757, now seen corresponding path program 3 times [2024-05-12 10:36:55,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:55,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838591419] [2024-05-12 10:36:55,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:55,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:55,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:55,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:36:55,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:55,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838591419] [2024-05-12 10:36:55,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838591419] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:55,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:55,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:36:55,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656891242] [2024-05-12 10:36:55,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:55,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:36:55,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:55,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:36:55,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:36:55,924 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 10:36:55,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 269 transitions, 3570 flow. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:55,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:55,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 10:36:55,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:56,606 INFO L124 PetriNetUnfolderBase]: 3184/5242 cut-off events. [2024-05-12 10:36:56,607 INFO L125 PetriNetUnfolderBase]: For 129096/129163 co-relation queries the response was YES. [2024-05-12 10:36:56,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34237 conditions, 5242 events. 3184/5242 cut-off events. For 129096/129163 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 34950 event pairs, 969 based on Foata normal form. 12/5129 useless extension candidates. Maximal degree in co-relation 34141. Up to 4069 conditions per place. [2024-05-12 10:36:56,662 INFO L140 encePairwiseOnDemand]: 39/46 looper letters, 215 selfloop transitions, 40 changer transitions 0/295 dead transitions. [2024-05-12 10:36:56,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 295 transitions, 4210 flow [2024-05-12 10:36:56,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-05-12 10:36:56,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-05-12 10:36:56,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 165 transitions. [2024-05-12 10:36:56,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5978260869565217 [2024-05-12 10:36:56,663 INFO L175 Difference]: Start difference. First operand has 202 places, 269 transitions, 3570 flow. Second operand 6 states and 165 transitions. [2024-05-12 10:36:56,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 295 transitions, 4210 flow [2024-05-12 10:36:56,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 295 transitions, 4121 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-05-12 10:36:56,994 INFO L231 Difference]: Finished difference. Result has 204 places, 270 transitions, 3585 flow [2024-05-12 10:36:56,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3481, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3585, PETRI_PLACES=204, PETRI_TRANSITIONS=270} [2024-05-12 10:36:56,995 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 154 predicate places. [2024-05-12 10:36:56,995 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 270 transitions, 3585 flow [2024-05-12 10:36:56,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:56,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:56,996 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:36:56,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-05-12 10:36:56,996 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:36:56,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:56,996 INFO L85 PathProgramCache]: Analyzing trace with hash 791265405, now seen corresponding path program 1 times [2024-05-12 10:36:56,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:56,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744245052] [2024-05-12 10:36:56,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:56,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:57,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:57,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:36:57,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:57,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744245052] [2024-05-12 10:36:57,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744245052] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:57,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:57,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:36:57,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760035231] [2024-05-12 10:36:57,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:57,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:36:57,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:57,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:36:57,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:36:57,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 10:36:57,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 270 transitions, 3585 flow. Second operand has 8 states, 8 states have (on average 19.0) internal successors, (152), 8 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:57,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:57,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 10:36:57,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:58,058 INFO L124 PetriNetUnfolderBase]: 3716/6024 cut-off events. [2024-05-12 10:36:58,058 INFO L125 PetriNetUnfolderBase]: For 156818/156832 co-relation queries the response was YES. [2024-05-12 10:36:58,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39843 conditions, 6024 events. 3716/6024 cut-off events. For 156818/156832 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 40294 event pairs, 447 based on Foata normal form. 25/6013 useless extension candidates. Maximal degree in co-relation 39746. Up to 4473 conditions per place. [2024-05-12 10:36:58,117 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 224 selfloop transitions, 58 changer transitions 0/313 dead transitions. [2024-05-12 10:36:58,118 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 313 transitions, 4495 flow [2024-05-12 10:36:58,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:36:58,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:36:58,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 204 transitions. [2024-05-12 10:36:58,119 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6335403726708074 [2024-05-12 10:36:58,119 INFO L175 Difference]: Start difference. First operand has 204 places, 270 transitions, 3585 flow. Second operand 7 states and 204 transitions. [2024-05-12 10:36:58,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 313 transitions, 4495 flow [2024-05-12 10:36:58,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 313 transitions, 4407 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-05-12 10:36:58,688 INFO L231 Difference]: Finished difference. Result has 207 places, 274 transitions, 3718 flow [2024-05-12 10:36:58,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3497, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3718, PETRI_PLACES=207, PETRI_TRANSITIONS=274} [2024-05-12 10:36:58,689 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 157 predicate places. [2024-05-12 10:36:58,689 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 274 transitions, 3718 flow [2024-05-12 10:36:58,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.0) internal successors, (152), 8 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:58,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:36:58,689 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:36:58,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-05-12 10:36:58,690 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:36:58,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:36:58,690 INFO L85 PathProgramCache]: Analyzing trace with hash 68166975, now seen corresponding path program 2 times [2024-05-12 10:36:58,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:36:58,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285892971] [2024-05-12 10:36:58,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:36:58,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:36:58,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:36:58,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:36:58,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:36:58,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285892971] [2024-05-12 10:36:58,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285892971] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:36:58,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:36:58,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:36:58,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97078475] [2024-05-12 10:36:58,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:36:58,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:36:58,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:36:58,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:36:58,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:36:58,986 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 10:36:58,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 274 transitions, 3718 flow. Second operand has 8 states, 8 states have (on average 19.0) internal successors, (152), 8 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:36:58,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:36:58,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 10:36:58,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:36:59,785 INFO L124 PetriNetUnfolderBase]: 3815/6185 cut-off events. [2024-05-12 10:36:59,785 INFO L125 PetriNetUnfolderBase]: For 167313/167327 co-relation queries the response was YES. [2024-05-12 10:36:59,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41539 conditions, 6185 events. 3815/6185 cut-off events. For 167313/167327 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 41507 event pairs, 655 based on Foata normal form. 25/6186 useless extension candidates. Maximal degree in co-relation 41441. Up to 5104 conditions per place. [2024-05-12 10:36:59,850 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 219 selfloop transitions, 57 changer transitions 0/307 dead transitions. [2024-05-12 10:36:59,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 307 transitions, 4434 flow [2024-05-12 10:36:59,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:36:59,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:36:59,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 197 transitions. [2024-05-12 10:36:59,851 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6118012422360248 [2024-05-12 10:36:59,852 INFO L175 Difference]: Start difference. First operand has 207 places, 274 transitions, 3718 flow. Second operand 7 states and 197 transitions. [2024-05-12 10:36:59,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 307 transitions, 4434 flow [2024-05-12 10:37:00,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 307 transitions, 4344 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-05-12 10:37:00,390 INFO L231 Difference]: Finished difference. Result has 211 places, 276 transitions, 3805 flow [2024-05-12 10:37:00,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3630, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3805, PETRI_PLACES=211, PETRI_TRANSITIONS=276} [2024-05-12 10:37:00,391 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 161 predicate places. [2024-05-12 10:37:00,391 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 276 transitions, 3805 flow [2024-05-12 10:37:00,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.0) internal successors, (152), 8 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:37:00,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:37:00,392 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:37:00,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-05-12 10:37:00,392 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:37:00,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:37:00,392 INFO L85 PathProgramCache]: Analyzing trace with hash 186254655, now seen corresponding path program 3 times [2024-05-12 10:37:00,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:37:00,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750273619] [2024-05-12 10:37:00,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:37:00,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:37:00,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:37:00,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:37:00,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:37:00,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750273619] [2024-05-12 10:37:00,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750273619] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:37:00,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:37:00,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:37:00,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964461133] [2024-05-12 10:37:00,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:37:00,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:37:00,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:37:00,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:37:00,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:37:00,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 46 [2024-05-12 10:37:00,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 276 transitions, 3805 flow. Second operand has 8 states, 8 states have (on average 19.0) internal successors, (152), 8 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:37:00,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:37:00,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 46 [2024-05-12 10:37:00,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:37:01,526 INFO L124 PetriNetUnfolderBase]: 3787/6145 cut-off events. [2024-05-12 10:37:01,527 INFO L125 PetriNetUnfolderBase]: For 159622/159636 co-relation queries the response was YES. [2024-05-12 10:37:01,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40865 conditions, 6145 events. 3787/6145 cut-off events. For 159622/159636 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 41205 event pairs, 645 based on Foata normal form. 25/6147 useless extension candidates. Maximal degree in co-relation 40765. Up to 5066 conditions per place. [2024-05-12 10:37:01,595 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 223 selfloop transitions, 56 changer transitions 0/310 dead transitions. [2024-05-12 10:37:01,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 310 transitions, 4481 flow [2024-05-12 10:37:01,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:37:01,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:37:01,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 221 transitions. [2024-05-12 10:37:01,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6005434782608695 [2024-05-12 10:37:01,597 INFO L175 Difference]: Start difference. First operand has 211 places, 276 transitions, 3805 flow. Second operand 8 states and 221 transitions. [2024-05-12 10:37:01,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 310 transitions, 4481 flow [2024-05-12 10:37:02,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 310 transitions, 4330 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-05-12 10:37:02,171 INFO L231 Difference]: Finished difference. Result has 214 places, 276 transitions, 3773 flow [2024-05-12 10:37:02,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3654, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3773, PETRI_PLACES=214, PETRI_TRANSITIONS=276} [2024-05-12 10:37:02,172 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 164 predicate places. [2024-05-12 10:37:02,172 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 276 transitions, 3773 flow [2024-05-12 10:37:02,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.0) internal successors, (152), 8 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:37:02,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:37:02,173 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:37:02,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-05-12 10:37:02,173 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:37:02,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:37:02,173 INFO L85 PathProgramCache]: Analyzing trace with hash -798903591, now seen corresponding path program 1 times [2024-05-12 10:37:02,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:37:02,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152033718] [2024-05-12 10:37:02,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:37:02,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:37:02,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:37:02,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:37:02,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:37:02,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152033718] [2024-05-12 10:37:02,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152033718] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:37:02,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:37:02,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:37:02,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569948382] [2024-05-12 10:37:02,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:37:02,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:37:02,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:37:02,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:37:02,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:37:02,453 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:37:02,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 276 transitions, 3773 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 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) [2024-05-12 10:37:02,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:37:02,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:37:02,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:37:03,271 INFO L124 PetriNetUnfolderBase]: 3594/5816 cut-off events. [2024-05-12 10:37:03,271 INFO L125 PetriNetUnfolderBase]: For 141611/141627 co-relation queries the response was YES. [2024-05-12 10:37:03,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38123 conditions, 5816 events. 3594/5816 cut-off events. For 141611/141627 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 38618 event pairs, 620 based on Foata normal form. 2/5769 useless extension candidates. Maximal degree in co-relation 38022. Up to 5179 conditions per place. [2024-05-12 10:37:03,323 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 266 selfloop transitions, 27 changer transitions 0/307 dead transitions. [2024-05-12 10:37:03,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 307 transitions, 4481 flow [2024-05-12 10:37:03,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:37:03,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:37:03,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 187 transitions. [2024-05-12 10:37:03,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5807453416149069 [2024-05-12 10:37:03,325 INFO L175 Difference]: Start difference. First operand has 214 places, 276 transitions, 3773 flow. Second operand 7 states and 187 transitions. [2024-05-12 10:37:03,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 307 transitions, 4481 flow [2024-05-12 10:37:03,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 307 transitions, 4346 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-05-12 10:37:03,802 INFO L231 Difference]: Finished difference. Result has 214 places, 278 transitions, 3741 flow [2024-05-12 10:37:03,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3638, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3741, PETRI_PLACES=214, PETRI_TRANSITIONS=278} [2024-05-12 10:37:03,803 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 164 predicate places. [2024-05-12 10:37:03,803 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 278 transitions, 3741 flow [2024-05-12 10:37:03,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 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) [2024-05-12 10:37:03,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:37:03,803 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:37:03,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-05-12 10:37:03,804 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:37:03,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:37:03,804 INFO L85 PathProgramCache]: Analyzing trace with hash 186439353, now seen corresponding path program 2 times [2024-05-12 10:37:03,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:37:03,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714716002] [2024-05-12 10:37:03,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:37:03,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:37:03,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:37:04,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:37:04,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:37:04,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714716002] [2024-05-12 10:37:04,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714716002] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:37:04,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:37:04,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:37:04,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566445392] [2024-05-12 10:37:04,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:37:04,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:37:04,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:37:04,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:37:04,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:37:04,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:37:04,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 278 transitions, 3741 flow. Second operand has 8 states, 8 states have (on average 18.0) internal successors, (144), 8 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) [2024-05-12 10:37:04,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:37:04,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:37:04,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:37:04,818 INFO L124 PetriNetUnfolderBase]: 3612/5885 cut-off events. [2024-05-12 10:37:04,818 INFO L125 PetriNetUnfolderBase]: For 144281/144297 co-relation queries the response was YES. [2024-05-12 10:37:04,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38053 conditions, 5885 events. 3612/5885 cut-off events. For 144281/144297 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 39423 event pairs, 883 based on Foata normal form. 2/5837 useless extension candidates. Maximal degree in co-relation 37951. Up to 5156 conditions per place. [2024-05-12 10:37:04,874 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 254 selfloop transitions, 44 changer transitions 0/312 dead transitions. [2024-05-12 10:37:04,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 312 transitions, 4469 flow [2024-05-12 10:37:04,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:37:04,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:37:04,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 209 transitions. [2024-05-12 10:37:04,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5679347826086957 [2024-05-12 10:37:04,875 INFO L175 Difference]: Start difference. First operand has 214 places, 278 transitions, 3741 flow. Second operand 8 states and 209 transitions. [2024-05-12 10:37:04,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 312 transitions, 4469 flow [2024-05-12 10:37:05,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 312 transitions, 4382 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-05-12 10:37:05,204 INFO L231 Difference]: Finished difference. Result has 217 places, 280 transitions, 3795 flow [2024-05-12 10:37:05,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3654, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3795, PETRI_PLACES=217, PETRI_TRANSITIONS=280} [2024-05-12 10:37:05,205 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 167 predicate places. [2024-05-12 10:37:05,205 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 280 transitions, 3795 flow [2024-05-12 10:37:05,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.0) internal successors, (144), 8 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) [2024-05-12 10:37:05,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:37:05,206 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:37:05,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-05-12 10:37:05,206 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:37:05,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:37:05,206 INFO L85 PathProgramCache]: Analyzing trace with hash 870211829, now seen corresponding path program 3 times [2024-05-12 10:37:05,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:37:05,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198069380] [2024-05-12 10:37:05,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:37:05,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:37:05,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:37:05,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:37:05,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:37:05,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198069380] [2024-05-12 10:37:05,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198069380] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:37:05,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:37:05,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:37:05,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752375327] [2024-05-12 10:37:05,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:37:05,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:37:05,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:37:05,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:37:05,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:37:05,508 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:37:05,509 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 280 transitions, 3795 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 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) [2024-05-12 10:37:05,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:37:05,509 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:37:05,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:37:06,260 INFO L124 PetriNetUnfolderBase]: 3630/5908 cut-off events. [2024-05-12 10:37:06,261 INFO L125 PetriNetUnfolderBase]: For 149692/149708 co-relation queries the response was YES. [2024-05-12 10:37:06,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38476 conditions, 5908 events. 3630/5908 cut-off events. For 149692/149708 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 39543 event pairs, 898 based on Foata normal form. 2/5861 useless extension candidates. Maximal degree in co-relation 38373. Up to 5231 conditions per place. [2024-05-12 10:37:06,317 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 270 selfloop transitions, 27 changer transitions 0/311 dead transitions. [2024-05-12 10:37:06,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 311 transitions, 4515 flow [2024-05-12 10:37:06,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:37:06,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:37:06,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-05-12 10:37:06,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5543478260869565 [2024-05-12 10:37:06,319 INFO L175 Difference]: Start difference. First operand has 217 places, 280 transitions, 3795 flow. Second operand 8 states and 204 transitions. [2024-05-12 10:37:06,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 311 transitions, 4515 flow [2024-05-12 10:37:06,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 311 transitions, 4390 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-05-12 10:37:06,812 INFO L231 Difference]: Finished difference. Result has 219 places, 282 transitions, 3781 flow [2024-05-12 10:37:06,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3670, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3781, PETRI_PLACES=219, PETRI_TRANSITIONS=282} [2024-05-12 10:37:06,812 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 169 predicate places. [2024-05-12 10:37:06,813 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 282 transitions, 3781 flow [2024-05-12 10:37:06,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 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) [2024-05-12 10:37:06,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:37:06,813 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:37:06,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-05-12 10:37:06,813 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:37:06,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:37:06,814 INFO L85 PathProgramCache]: Analyzing trace with hash 878782709, now seen corresponding path program 4 times [2024-05-12 10:37:06,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:37:06,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256227771] [2024-05-12 10:37:06,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:37:06,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:37:06,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:37:07,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:37:07,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:37:07,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256227771] [2024-05-12 10:37:07,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256227771] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:37:07,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:37:07,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:37:07,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046597712] [2024-05-12 10:37:07,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:37:07,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:37:07,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:37:07,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:37:07,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:37:07,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:37:07,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 282 transitions, 3781 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 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) [2024-05-12 10:37:07,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:37:07,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:37:07,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:37:07,939 INFO L124 PetriNetUnfolderBase]: 3707/6010 cut-off events. [2024-05-12 10:37:07,939 INFO L125 PetriNetUnfolderBase]: For 162125/162141 co-relation queries the response was YES. [2024-05-12 10:37:07,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39462 conditions, 6010 events. 3707/6010 cut-off events. For 162125/162141 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 40302 event pairs, 884 based on Foata normal form. 2/5968 useless extension candidates. Maximal degree in co-relation 39358. Up to 5178 conditions per place. [2024-05-12 10:37:08,002 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 274 selfloop transitions, 31 changer transitions 0/319 dead transitions. [2024-05-12 10:37:08,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 319 transitions, 4679 flow [2024-05-12 10:37:08,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:37:08,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:37:08,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 209 transitions. [2024-05-12 10:37:08,004 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5679347826086957 [2024-05-12 10:37:08,005 INFO L175 Difference]: Start difference. First operand has 219 places, 282 transitions, 3781 flow. Second operand 8 states and 209 transitions. [2024-05-12 10:37:08,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 319 transitions, 4679 flow [2024-05-12 10:37:08,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 319 transitions, 4596 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-05-12 10:37:08,388 INFO L231 Difference]: Finished difference. Result has 223 places, 285 transitions, 3839 flow [2024-05-12 10:37:08,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3698, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3839, PETRI_PLACES=223, PETRI_TRANSITIONS=285} [2024-05-12 10:37:08,389 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 173 predicate places. [2024-05-12 10:37:08,389 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 285 transitions, 3839 flow [2024-05-12 10:37:08,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 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) [2024-05-12 10:37:08,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:37:08,389 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:37:08,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-05-12 10:37:08,390 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:37:08,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:37:08,390 INFO L85 PathProgramCache]: Analyzing trace with hash 228208726, now seen corresponding path program 1 times [2024-05-12 10:37:08,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:37:08,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722131950] [2024-05-12 10:37:08,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:37:08,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:37:08,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:37:08,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:37:08,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:37:08,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722131950] [2024-05-12 10:37:08,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722131950] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:37:08,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:37:08,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-05-12 10:37:08,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809482538] [2024-05-12 10:37:08,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:37:08,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-05-12 10:37:08,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:37:08,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-05-12 10:37:08,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-05-12 10:37:08,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 46 [2024-05-12 10:37:08,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 285 transitions, 3839 flow. Second operand has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:37:08,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:37:08,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 46 [2024-05-12 10:37:08,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:37:09,156 INFO L124 PetriNetUnfolderBase]: 2483/5376 cut-off events. [2024-05-12 10:37:09,157 INFO L125 PetriNetUnfolderBase]: For 94442/94622 co-relation queries the response was YES. [2024-05-12 10:37:09,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28053 conditions, 5376 events. 2483/5376 cut-off events. For 94442/94622 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 46357 event pairs, 328 based on Foata normal form. 234/5177 useless extension candidates. Maximal degree in co-relation 27948. Up to 2122 conditions per place. [2024-05-12 10:37:09,213 INFO L140 encePairwiseOnDemand]: 40/46 looper letters, 34 selfloop transitions, 91 changer transitions 0/302 dead transitions. [2024-05-12 10:37:09,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 302 transitions, 4235 flow [2024-05-12 10:37:09,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-05-12 10:37:09,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-05-12 10:37:09,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 135 transitions. [2024-05-12 10:37:09,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7336956521739131 [2024-05-12 10:37:09,215 INFO L175 Difference]: Start difference. First operand has 223 places, 285 transitions, 3839 flow. Second operand 4 states and 135 transitions. [2024-05-12 10:37:09,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 302 transitions, 4235 flow [2024-05-12 10:37:09,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 302 transitions, 4146 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-05-12 10:37:09,530 INFO L231 Difference]: Finished difference. Result has 223 places, 289 transitions, 4184 flow [2024-05-12 10:37:09,531 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=3750, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=4184, PETRI_PLACES=223, PETRI_TRANSITIONS=289} [2024-05-12 10:37:09,531 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 173 predicate places. [2024-05-12 10:37:09,531 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 289 transitions, 4184 flow [2024-05-12 10:37:09,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:37:09,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:37:09,531 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:37:09,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-05-12 10:37:09,532 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:37:09,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:37:09,532 INFO L85 PathProgramCache]: Analyzing trace with hash -2032960529, now seen corresponding path program 1 times [2024-05-12 10:37:09,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:37:09,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709544478] [2024-05-12 10:37:09,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:37:09,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:37:09,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:37:09,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:37:09,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:37:09,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709544478] [2024-05-12 10:37:09,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709544478] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:37:09,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:37:09,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 10:37:09,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731288532] [2024-05-12 10:37:09,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:37:09,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 10:37:09,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:37:09,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 10:37:09,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-05-12 10:37:09,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 46 [2024-05-12 10:37:09,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 289 transitions, 4184 flow. Second operand has 11 states, 11 states have (on average 16.545454545454547) internal successors, (182), 11 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:37:09,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:37:09,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 46 [2024-05-12 10:37:09,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:37:11,147 INFO L124 PetriNetUnfolderBase]: 4758/7835 cut-off events. [2024-05-12 10:37:11,147 INFO L125 PetriNetUnfolderBase]: For 214454/214456 co-relation queries the response was YES. [2024-05-12 10:37:11,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51830 conditions, 7835 events. 4758/7835 cut-off events. For 214454/214456 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 53658 event pairs, 1217 based on Foata normal form. 8/7583 useless extension candidates. Maximal degree in co-relation 51722. Up to 6553 conditions per place. [2024-05-12 10:37:11,383 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 282 selfloop transitions, 48 changer transitions 0/342 dead transitions. [2024-05-12 10:37:11,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 342 transitions, 5289 flow [2024-05-12 10:37:11,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 10:37:11,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 10:37:11,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 251 transitions. [2024-05-12 10:37:11,384 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5456521739130434 [2024-05-12 10:37:11,384 INFO L175 Difference]: Start difference. First operand has 223 places, 289 transitions, 4184 flow. Second operand 10 states and 251 transitions. [2024-05-12 10:37:11,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 342 transitions, 5289 flow [2024-05-12 10:37:12,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 342 transitions, 5277 flow, removed 5 selfloop flow, removed 1 redundant places. [2024-05-12 10:37:12,152 INFO L231 Difference]: Finished difference. Result has 234 places, 296 transitions, 4392 flow [2024-05-12 10:37:12,152 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4172, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4392, PETRI_PLACES=234, PETRI_TRANSITIONS=296} [2024-05-12 10:37:12,152 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 184 predicate places. [2024-05-12 10:37:12,152 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 296 transitions, 4392 flow [2024-05-12 10:37:12,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 16.545454545454547) internal successors, (182), 11 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:37:12,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:37:12,153 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:37:12,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-05-12 10:37:12,153 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:37:12,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:37:12,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1518482013, now seen corresponding path program 2 times [2024-05-12 10:37:12,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:37:12,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474089661] [2024-05-12 10:37:12,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:37:12,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:37:12,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:37:12,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:37:12,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:37:12,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474089661] [2024-05-12 10:37:12,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474089661] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:37:12,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:37:12,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:37:12,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923100774] [2024-05-12 10:37:12,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:37:12,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:37:12,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:37:12,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:37:12,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:37:12,514 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:37:12,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 296 transitions, 4392 flow. Second operand has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:37:12,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:37:12,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:37:12,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:37:13,499 INFO L124 PetriNetUnfolderBase]: 4017/6817 cut-off events. [2024-05-12 10:37:13,499 INFO L125 PetriNetUnfolderBase]: For 198504/199176 co-relation queries the response was YES. [2024-05-12 10:37:13,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43829 conditions, 6817 events. 4017/6817 cut-off events. For 198504/199176 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 47988 event pairs, 956 based on Foata normal form. 53/6594 useless extension candidates. Maximal degree in co-relation 43716. Up to 5320 conditions per place. [2024-05-12 10:37:13,569 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 258 selfloop transitions, 48 changer transitions 0/321 dead transitions. [2024-05-12 10:37:13,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 321 transitions, 5156 flow [2024-05-12 10:37:13,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:37:13,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:37:13,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-05-12 10:37:13,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5590062111801242 [2024-05-12 10:37:13,570 INFO L175 Difference]: Start difference. First operand has 234 places, 296 transitions, 4392 flow. Second operand 7 states and 180 transitions. [2024-05-12 10:37:13,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 321 transitions, 5156 flow [2024-05-12 10:37:14,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 321 transitions, 5085 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-05-12 10:37:14,207 INFO L231 Difference]: Finished difference. Result has 236 places, 296 transitions, 4425 flow [2024-05-12 10:37:14,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4321, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4425, PETRI_PLACES=236, PETRI_TRANSITIONS=296} [2024-05-12 10:37:14,208 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 186 predicate places. [2024-05-12 10:37:14,208 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 296 transitions, 4425 flow [2024-05-12 10:37:14,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:37:14,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:37:14,208 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:37:14,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-05-12 10:37:14,208 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:37:14,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:37:14,209 INFO L85 PathProgramCache]: Analyzing trace with hash -1047064969, now seen corresponding path program 1 times [2024-05-12 10:37:14,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:37:14,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604025172] [2024-05-12 10:37:14,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:37:14,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:37:14,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:37:14,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:37:14,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:37:14,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604025172] [2024-05-12 10:37:14,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604025172] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:37:14,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:37:14,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:37:14,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284387212] [2024-05-12 10:37:14,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:37:14,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:37:14,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:37:14,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:37:14,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:37:14,517 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:37:14,517 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 296 transitions, 4425 flow. Second operand has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:37:14,517 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:37:14,517 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:37:14,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:37:15,504 INFO L124 PetriNetUnfolderBase]: 4085/6839 cut-off events. [2024-05-12 10:37:15,505 INFO L125 PetriNetUnfolderBase]: For 193246/193921 co-relation queries the response was YES. [2024-05-12 10:37:15,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45125 conditions, 6839 events. 4085/6839 cut-off events. For 193246/193921 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 47572 event pairs, 1263 based on Foata normal form. 188/6732 useless extension candidates. Maximal degree in co-relation 45010. Up to 5824 conditions per place. [2024-05-12 10:37:15,582 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 226 selfloop transitions, 95 changer transitions 0/336 dead transitions. [2024-05-12 10:37:15,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 336 transitions, 5681 flow [2024-05-12 10:37:15,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 10:37:15,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 10:37:15,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 227 transitions. [2024-05-12 10:37:15,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5483091787439613 [2024-05-12 10:37:15,583 INFO L175 Difference]: Start difference. First operand has 236 places, 296 transitions, 4425 flow. Second operand 9 states and 227 transitions. [2024-05-12 10:37:15,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 336 transitions, 5681 flow [2024-05-12 10:37:16,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 336 transitions, 5563 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-05-12 10:37:16,249 INFO L231 Difference]: Finished difference. Result has 240 places, 311 transitions, 4886 flow [2024-05-12 10:37:16,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4311, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4886, PETRI_PLACES=240, PETRI_TRANSITIONS=311} [2024-05-12 10:37:16,249 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 190 predicate places. [2024-05-12 10:37:16,250 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 311 transitions, 4886 flow [2024-05-12 10:37:16,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:37:16,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:37:16,250 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:37:16,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-05-12 10:37:16,250 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:37:16,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:37:16,251 INFO L85 PathProgramCache]: Analyzing trace with hash -36270599, now seen corresponding path program 1 times [2024-05-12 10:37:16,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:37:16,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171903345] [2024-05-12 10:37:16,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:37:16,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:37:16,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:37:16,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:37:16,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:37:16,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171903345] [2024-05-12 10:37:16,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171903345] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:37:16,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:37:16,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 10:37:16,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144879979] [2024-05-12 10:37:16,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:37:16,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 10:37:16,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:37:16,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 10:37:16,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2024-05-12 10:37:16,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:37:16,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 311 transitions, 4886 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:37:16,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:37:16,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:37:16,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:37:17,675 INFO L124 PetriNetUnfolderBase]: 4102/6863 cut-off events. [2024-05-12 10:37:17,675 INFO L125 PetriNetUnfolderBase]: For 196304/197264 co-relation queries the response was YES. [2024-05-12 10:37:17,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45331 conditions, 6863 events. 4102/6863 cut-off events. For 196304/197264 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 47710 event pairs, 1264 based on Foata normal form. 271/6835 useless extension candidates. Maximal degree in co-relation 45215. Up to 5809 conditions per place. [2024-05-12 10:37:17,737 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 245 selfloop transitions, 83 changer transitions 0/343 dead transitions. [2024-05-12 10:37:17,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 343 transitions, 5948 flow [2024-05-12 10:37:17,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 10:37:17,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 10:37:17,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 226 transitions. [2024-05-12 10:37:17,739 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5458937198067633 [2024-05-12 10:37:17,739 INFO L175 Difference]: Start difference. First operand has 240 places, 311 transitions, 4886 flow. Second operand 9 states and 226 transitions. [2024-05-12 10:37:17,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 343 transitions, 5948 flow [2024-05-12 10:37:18,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 343 transitions, 5768 flow, removed 53 selfloop flow, removed 4 redundant places. [2024-05-12 10:37:18,252 INFO L231 Difference]: Finished difference. Result has 245 places, 317 transitions, 5005 flow [2024-05-12 10:37:18,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4706, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5005, PETRI_PLACES=245, PETRI_TRANSITIONS=317} [2024-05-12 10:37:18,253 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 195 predicate places. [2024-05-12 10:37:18,253 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 317 transitions, 5005 flow [2024-05-12 10:37:18,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:37:18,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:37:18,253 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:37:18,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-05-12 10:37:18,254 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:37:18,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:37:18,254 INFO L85 PathProgramCache]: Analyzing trace with hash 2043763713, now seen corresponding path program 1 times [2024-05-12 10:37:18,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:37:18,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275424272] [2024-05-12 10:37:18,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:37:18,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:37:18,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:37:18,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:37:18,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:37:18,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275424272] [2024-05-12 10:37:18,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275424272] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:37:18,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:37:18,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:37:18,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051702794] [2024-05-12 10:37:18,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:37:18,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:37:18,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:37:18,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:37:18,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:37:18,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:37:18,599 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 317 transitions, 5005 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:37:18,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:37:18,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:37:18,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:37:19,626 INFO L124 PetriNetUnfolderBase]: 4117/6886 cut-off events. [2024-05-12 10:37:19,626 INFO L125 PetriNetUnfolderBase]: For 202490/203437 co-relation queries the response was YES. [2024-05-12 10:37:19,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45921 conditions, 6886 events. 4117/6886 cut-off events. For 202490/203437 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 47892 event pairs, 1262 based on Foata normal form. 255/6837 useless extension candidates. Maximal degree in co-relation 45803. Up to 5922 conditions per place. [2024-05-12 10:37:19,697 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 240 selfloop transitions, 84 changer transitions 0/339 dead transitions. [2024-05-12 10:37:19,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 339 transitions, 5920 flow [2024-05-12 10:37:19,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:37:19,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:37:19,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-05-12 10:37:19,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5516304347826086 [2024-05-12 10:37:19,699 INFO L175 Difference]: Start difference. First operand has 245 places, 317 transitions, 5005 flow. Second operand 8 states and 203 transitions. [2024-05-12 10:37:19,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 339 transitions, 5920 flow [2024-05-12 10:37:20,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 339 transitions, 5704 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-05-12 10:37:20,470 INFO L231 Difference]: Finished difference. Result has 247 places, 321 transitions, 5079 flow [2024-05-12 10:37:20,470 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4789, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5079, PETRI_PLACES=247, PETRI_TRANSITIONS=321} [2024-05-12 10:37:20,470 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 197 predicate places. [2024-05-12 10:37:20,471 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 321 transitions, 5079 flow [2024-05-12 10:37:20,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:37:20,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:37:20,471 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:37:20,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-05-12 10:37:20,471 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:37:20,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:37:20,472 INFO L85 PathProgramCache]: Analyzing trace with hash -36150629, now seen corresponding path program 2 times [2024-05-12 10:37:20,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:37:20,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245326882] [2024-05-12 10:37:20,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:37:20,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:37:20,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:37:20,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:37:20,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:37:20,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245326882] [2024-05-12 10:37:20,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245326882] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:37:20,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:37:20,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:37:20,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304944865] [2024-05-12 10:37:20,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:37:20,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:37:20,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:37:20,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:37:20,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:37:20,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:37:20,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 321 transitions, 5079 flow. Second operand has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:37:20,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:37:20,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:37:20,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:37:21,791 INFO L124 PetriNetUnfolderBase]: 4124/6897 cut-off events. [2024-05-12 10:37:21,791 INFO L125 PetriNetUnfolderBase]: For 205602/206484 co-relation queries the response was YES. [2024-05-12 10:37:21,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45989 conditions, 6897 events. 4124/6897 cut-off events. For 205602/206484 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 47922 event pairs, 1262 based on Foata normal form. 251/6842 useless extension candidates. Maximal degree in co-relation 45870. Up to 5836 conditions per place. [2024-05-12 10:37:21,862 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 246 selfloop transitions, 85 changer transitions 0/346 dead transitions. [2024-05-12 10:37:21,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 346 transitions, 5960 flow [2024-05-12 10:37:21,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:37:21,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:37:21,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-05-12 10:37:21,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5570652173913043 [2024-05-12 10:37:21,864 INFO L175 Difference]: Start difference. First operand has 247 places, 321 transitions, 5079 flow. Second operand 8 states and 205 transitions. [2024-05-12 10:37:21,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 346 transitions, 5960 flow [2024-05-12 10:37:22,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 346 transitions, 5774 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-05-12 10:37:22,545 INFO L231 Difference]: Finished difference. Result has 248 places, 324 transitions, 5120 flow [2024-05-12 10:37:22,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4895, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5120, PETRI_PLACES=248, PETRI_TRANSITIONS=324} [2024-05-12 10:37:22,546 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 198 predicate places. [2024-05-12 10:37:22,546 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 324 transitions, 5120 flow [2024-05-12 10:37:22,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:37:22,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:37:22,546 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:37:22,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-05-12 10:37:22,546 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:37:22,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:37:22,547 INFO L85 PathProgramCache]: Analyzing trace with hash -282367025, now seen corresponding path program 2 times [2024-05-12 10:37:22,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:37:22,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120627576] [2024-05-12 10:37:22,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:37:22,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:37:22,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:37:22,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:37:22,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:37:22,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120627576] [2024-05-12 10:37:22,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120627576] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:37:22,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:37:22,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 10:37:22,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894091441] [2024-05-12 10:37:22,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:37:22,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 10:37:22,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:37:22,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 10:37:22,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-05-12 10:37:22,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:37:22,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 324 transitions, 5120 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:37:22,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:37:22,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:37:22,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:37:24,130 INFO L124 PetriNetUnfolderBase]: 4152/6939 cut-off events. [2024-05-12 10:37:24,130 INFO L125 PetriNetUnfolderBase]: For 210823/211728 co-relation queries the response was YES. [2024-05-12 10:37:24,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46610 conditions, 6939 events. 4152/6939 cut-off events. For 210823/211728 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 48209 event pairs, 1263 based on Foata normal form. 343/6969 useless extension candidates. Maximal degree in co-relation 46492. Up to 5664 conditions per place. [2024-05-12 10:37:24,219 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 164 selfloop transitions, 181 changer transitions 0/360 dead transitions. [2024-05-12 10:37:24,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 360 transitions, 6458 flow [2024-05-12 10:37:24,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-05-12 10:37:24,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-05-12 10:37:24,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 288 transitions. [2024-05-12 10:37:24,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5217391304347826 [2024-05-12 10:37:24,220 INFO L175 Difference]: Start difference. First operand has 248 places, 324 transitions, 5120 flow. Second operand 12 states and 288 transitions. [2024-05-12 10:37:24,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 360 transitions, 6458 flow [2024-05-12 10:37:24,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 360 transitions, 6315 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-05-12 10:37:24,927 INFO L231 Difference]: Finished difference. Result has 256 places, 333 transitions, 5696 flow [2024-05-12 10:37:24,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=4977, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5696, PETRI_PLACES=256, PETRI_TRANSITIONS=333} [2024-05-12 10:37:24,928 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 206 predicate places. [2024-05-12 10:37:24,928 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 333 transitions, 5696 flow [2024-05-12 10:37:24,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:37:24,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:37:24,929 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:37:24,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-05-12 10:37:24,929 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:37:24,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:37:24,929 INFO L85 PathProgramCache]: Analyzing trace with hash -277124801, now seen corresponding path program 3 times [2024-05-12 10:37:24,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:37:24,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827602906] [2024-05-12 10:37:24,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:37:24,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:37:24,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:37:25,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:37:25,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:37:25,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827602906] [2024-05-12 10:37:25,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827602906] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:37:25,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:37:25,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:37:25,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113766256] [2024-05-12 10:37:25,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:37:25,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:37:25,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:37:25,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:37:25,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:37:25,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:37:25,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 333 transitions, 5696 flow. Second operand has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:37:25,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:37:25,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:37:25,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:37:26,322 INFO L124 PetriNetUnfolderBase]: 4159/6950 cut-off events. [2024-05-12 10:37:26,323 INFO L125 PetriNetUnfolderBase]: For 220370/221351 co-relation queries the response was YES. [2024-05-12 10:37:26,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47495 conditions, 6950 events. 4159/6950 cut-off events. For 220370/221351 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 48275 event pairs, 1263 based on Foata normal form. 254/6889 useless extension candidates. Maximal degree in co-relation 47374. Up to 5880 conditions per place. [2024-05-12 10:37:26,396 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 251 selfloop transitions, 92 changer transitions 0/358 dead transitions. [2024-05-12 10:37:26,396 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 358 transitions, 6735 flow [2024-05-12 10:37:26,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:37:26,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:37:26,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-05-12 10:37:26,397 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5489130434782609 [2024-05-12 10:37:26,397 INFO L175 Difference]: Start difference. First operand has 256 places, 333 transitions, 5696 flow. Second operand 8 states and 202 transitions. [2024-05-12 10:37:26,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 358 transitions, 6735 flow [2024-05-12 10:37:27,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 358 transitions, 6434 flow, removed 77 selfloop flow, removed 7 redundant places. [2024-05-12 10:37:27,207 INFO L231 Difference]: Finished difference. Result has 257 places, 336 transitions, 5660 flow [2024-05-12 10:37:27,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5398, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5660, PETRI_PLACES=257, PETRI_TRANSITIONS=336} [2024-05-12 10:37:27,207 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 207 predicate places. [2024-05-12 10:37:27,208 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 336 transitions, 5660 flow [2024-05-12 10:37:27,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:37:27,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:37:27,208 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:37:27,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-05-12 10:37:27,208 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:37:27,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:37:27,209 INFO L85 PathProgramCache]: Analyzing trace with hash -276826271, now seen corresponding path program 4 times [2024-05-12 10:37:27,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:37:27,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412796278] [2024-05-12 10:37:27,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:37:27,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:37:27,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:37:27,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:37:27,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:37:27,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412796278] [2024-05-12 10:37:27,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412796278] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:37:27,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:37:27,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:37:27,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766759947] [2024-05-12 10:37:27,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:37:27,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:37:27,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:37:27,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:37:27,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:37:27,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:37:27,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 336 transitions, 5660 flow. Second operand has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:37:27,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:37:27,528 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:37:27,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:37:28,591 INFO L124 PetriNetUnfolderBase]: 4166/6961 cut-off events. [2024-05-12 10:37:28,591 INFO L125 PetriNetUnfolderBase]: For 221726/222478 co-relation queries the response was YES. [2024-05-12 10:37:28,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47692 conditions, 6961 events. 4166/6961 cut-off events. For 221726/222478 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 48347 event pairs, 1263 based on Foata normal form. 192/6836 useless extension candidates. Maximal degree in co-relation 47569. Up to 5888 conditions per place. [2024-05-12 10:37:28,676 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 245 selfloop transitions, 97 changer transitions 0/357 dead transitions. [2024-05-12 10:37:28,676 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 357 transitions, 6582 flow [2024-05-12 10:37:28,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:37:28,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:37:28,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-05-12 10:37:28,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5407608695652174 [2024-05-12 10:37:28,677 INFO L175 Difference]: Start difference. First operand has 257 places, 336 transitions, 5660 flow. Second operand 8 states and 199 transitions. [2024-05-12 10:37:28,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 357 transitions, 6582 flow [2024-05-12 10:37:29,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 357 transitions, 6311 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-05-12 10:37:29,496 INFO L231 Difference]: Finished difference. Result has 259 places, 339 transitions, 5665 flow [2024-05-12 10:37:29,497 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5409, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5665, PETRI_PLACES=259, PETRI_TRANSITIONS=339} [2024-05-12 10:37:29,499 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 209 predicate places. [2024-05-12 10:37:29,499 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 339 transitions, 5665 flow [2024-05-12 10:37:29,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:37:29,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:37:29,499 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:37:29,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-05-12 10:37:29,500 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:37:29,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:37:29,500 INFO L85 PathProgramCache]: Analyzing trace with hash -30609317, now seen corresponding path program 2 times [2024-05-12 10:37:29,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:37:29,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563820514] [2024-05-12 10:37:29,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:37:29,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:37:29,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:37:29,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:37:29,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:37:29,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563820514] [2024-05-12 10:37:29,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563820514] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:37:29,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:37:29,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:37:29,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459373787] [2024-05-12 10:37:29,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:37:29,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:37:29,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:37:29,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:37:29,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:37:29,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:37:29,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 339 transitions, 5665 flow. Second operand has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:37:29,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:37:29,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:37:29,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:37:31,160 INFO L124 PetriNetUnfolderBase]: 4181/6984 cut-off events. [2024-05-12 10:37:31,160 INFO L125 PetriNetUnfolderBase]: For 227362/228098 co-relation queries the response was YES. [2024-05-12 10:37:31,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47933 conditions, 6984 events. 4181/6984 cut-off events. For 227362/228098 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 48438 event pairs, 1263 based on Foata normal form. 298/6960 useless extension candidates. Maximal degree in co-relation 47809. Up to 5903 conditions per place. [2024-05-12 10:37:31,222 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 225 selfloop transitions, 123 changer transitions 0/363 dead transitions. [2024-05-12 10:37:31,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 363 transitions, 6620 flow [2024-05-12 10:37:31,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 10:37:31,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 10:37:31,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 246 transitions. [2024-05-12 10:37:31,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5347826086956522 [2024-05-12 10:37:31,224 INFO L175 Difference]: Start difference. First operand has 259 places, 339 transitions, 5665 flow. Second operand 10 states and 246 transitions. [2024-05-12 10:37:31,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 363 transitions, 6620 flow [2024-05-12 10:37:32,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 363 transitions, 6434 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-05-12 10:37:32,086 INFO L231 Difference]: Finished difference. Result has 264 places, 343 transitions, 5827 flow [2024-05-12 10:37:32,086 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5481, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5827, PETRI_PLACES=264, PETRI_TRANSITIONS=343} [2024-05-12 10:37:32,087 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 214 predicate places. [2024-05-12 10:37:32,087 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 343 transitions, 5827 flow [2024-05-12 10:37:32,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:37:32,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:37:32,087 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:37:32,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-05-12 10:37:32,087 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:37:32,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:37:32,088 INFO L85 PathProgramCache]: Analyzing trace with hash 1699004525, now seen corresponding path program 3 times [2024-05-12 10:37:32,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:37:32,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63426233] [2024-05-12 10:37:32,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:37:32,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:37:32,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:37:32,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:37:32,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:37:32,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63426233] [2024-05-12 10:37:32,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63426233] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:37:32,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:37:32,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:37:32,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697036186] [2024-05-12 10:37:32,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:37:32,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:37:32,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:37:32,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:37:32,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:37:32,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:37:32,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 343 transitions, 5827 flow. Second operand has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 7 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:37:32,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:37:32,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:37:32,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:37:33,459 INFO L124 PetriNetUnfolderBase]: 4172/6972 cut-off events. [2024-05-12 10:37:33,459 INFO L125 PetriNetUnfolderBase]: For 229191/229964 co-relation queries the response was YES. [2024-05-12 10:37:33,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47741 conditions, 6972 events. 4172/6972 cut-off events. For 229191/229964 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 48417 event pairs, 1263 based on Foata normal form. 186/6836 useless extension candidates. Maximal degree in co-relation 47616. Up to 5995 conditions per place. [2024-05-12 10:37:33,533 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 259 selfloop transitions, 83 changer transitions 0/357 dead transitions. [2024-05-12 10:37:33,534 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 357 transitions, 6551 flow [2024-05-12 10:37:33,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:37:33,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:37:33,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-05-12 10:37:33,534 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5652173913043478 [2024-05-12 10:37:33,535 INFO L175 Difference]: Start difference. First operand has 264 places, 343 transitions, 5827 flow. Second operand 7 states and 182 transitions. [2024-05-12 10:37:33,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 357 transitions, 6551 flow [2024-05-12 10:37:34,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 357 transitions, 6326 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-05-12 10:37:34,314 INFO L231 Difference]: Finished difference. Result has 264 places, 343 transitions, 5785 flow [2024-05-12 10:37:34,315 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5602, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5785, PETRI_PLACES=264, PETRI_TRANSITIONS=343} [2024-05-12 10:37:34,315 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 214 predicate places. [2024-05-12 10:37:34,315 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 343 transitions, 5785 flow [2024-05-12 10:37:34,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 7 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:37:34,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:37:34,316 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:37:34,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-05-12 10:37:34,316 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:37:34,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:37:34,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1699004339, now seen corresponding path program 3 times [2024-05-12 10:37:34,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:37:34,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038110277] [2024-05-12 10:37:34,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:37:34,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:37:34,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:37:34,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:37:34,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:37:34,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038110277] [2024-05-12 10:37:34,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038110277] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:37:34,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:37:34,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:37:34,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6053847] [2024-05-12 10:37:34,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:37:34,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:37:34,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:37:34,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:37:34,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:37:34,673 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:37:34,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 343 transitions, 5785 flow. Second operand has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:37:34,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:37:34,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:37:34,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:37:35,741 INFO L124 PetriNetUnfolderBase]: 4179/6983 cut-off events. [2024-05-12 10:37:35,741 INFO L125 PetriNetUnfolderBase]: For 226237/226963 co-relation queries the response was YES. [2024-05-12 10:37:35,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47621 conditions, 6983 events. 4179/6983 cut-off events. For 226237/226963 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 48427 event pairs, 1263 based on Foata normal form. 207/6868 useless extension candidates. Maximal degree in co-relation 47497. Up to 5941 conditions per place. [2024-05-12 10:37:35,815 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 252 selfloop transitions, 101 changer transitions 0/368 dead transitions. [2024-05-12 10:37:35,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 368 transitions, 6863 flow [2024-05-12 10:37:35,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 10:37:35,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 10:37:35,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 224 transitions. [2024-05-12 10:37:35,816 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5410628019323671 [2024-05-12 10:37:35,816 INFO L175 Difference]: Start difference. First operand has 264 places, 343 transitions, 5785 flow. Second operand 9 states and 224 transitions. [2024-05-12 10:37:35,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 368 transitions, 6863 flow [2024-05-12 10:37:36,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 368 transitions, 6666 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-05-12 10:37:36,700 INFO L231 Difference]: Finished difference. Result has 266 places, 346 transitions, 5858 flow [2024-05-12 10:37:36,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5592, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5858, PETRI_PLACES=266, PETRI_TRANSITIONS=346} [2024-05-12 10:37:36,700 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 216 predicate places. [2024-05-12 10:37:36,701 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 346 transitions, 5858 flow [2024-05-12 10:37:36,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:37:36,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:37:36,701 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:37:36,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-05-12 10:37:36,701 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:37:36,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:37:36,702 INFO L85 PathProgramCache]: Analyzing trace with hash -1917937217, now seen corresponding path program 4 times [2024-05-12 10:37:36,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:37:36,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516760937] [2024-05-12 10:37:36,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:37:36,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:37:36,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:37:36,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:37:36,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:37:36,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516760937] [2024-05-12 10:37:36,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516760937] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:37:36,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:37:36,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 10:37:36,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262589338] [2024-05-12 10:37:36,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:37:36,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 10:37:36,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:37:36,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 10:37:36,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-05-12 10:37:37,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:37:37,059 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 346 transitions, 5858 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:37:37,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:37:37,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:37:37,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:37:38,156 INFO L124 PetriNetUnfolderBase]: 4194/7006 cut-off events. [2024-05-12 10:37:38,157 INFO L125 PetriNetUnfolderBase]: For 228418/229164 co-relation queries the response was YES. [2024-05-12 10:37:38,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47949 conditions, 7006 events. 4194/7006 cut-off events. For 228418/229164 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 48703 event pairs, 1263 based on Foata normal form. 298/6977 useless extension candidates. Maximal degree in co-relation 47824. Up to 5919 conditions per place. [2024-05-12 10:37:38,229 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 229 selfloop transitions, 130 changer transitions 0/374 dead transitions. [2024-05-12 10:37:38,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 374 transitions, 6961 flow [2024-05-12 10:37:38,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-05-12 10:37:38,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-05-12 10:37:38,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 313 transitions. [2024-05-12 10:37:38,230 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5234113712374582 [2024-05-12 10:37:38,230 INFO L175 Difference]: Start difference. First operand has 266 places, 346 transitions, 5858 flow. Second operand 13 states and 313 transitions. [2024-05-12 10:37:38,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 374 transitions, 6961 flow [2024-05-12 10:37:38,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 374 transitions, 6768 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-05-12 10:37:38,988 INFO L231 Difference]: Finished difference. Result has 273 places, 350 transitions, 6029 flow [2024-05-12 10:37:38,988 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5665, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6029, PETRI_PLACES=273, PETRI_TRANSITIONS=350} [2024-05-12 10:37:38,989 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 223 predicate places. [2024-05-12 10:37:38,989 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 350 transitions, 6029 flow [2024-05-12 10:37:38,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:37:38,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:37:38,989 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:37:38,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-05-12 10:37:38,989 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:37:38,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:37:38,990 INFO L85 PathProgramCache]: Analyzing trace with hash -1822016349, now seen corresponding path program 5 times [2024-05-12 10:37:38,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:37:38,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143547387] [2024-05-12 10:37:38,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:37:38,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:37:38,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:37:39,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:37:39,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:37:39,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143547387] [2024-05-12 10:37:39,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143547387] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:37:39,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:37:39,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 10:37:39,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751953713] [2024-05-12 10:37:39,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:37:39,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 10:37:39,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:37:39,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 10:37:39,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2024-05-12 10:37:39,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:37:39,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 350 transitions, 6029 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:37:39,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:37:39,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:37:39,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:37:40,393 INFO L124 PetriNetUnfolderBase]: 4191/7002 cut-off events. [2024-05-12 10:37:40,393 INFO L125 PetriNetUnfolderBase]: For 229807/230506 co-relation queries the response was YES. [2024-05-12 10:37:40,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48105 conditions, 7002 events. 4191/7002 cut-off events. For 229807/230506 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 48656 event pairs, 1263 based on Foata normal form. 189/6864 useless extension candidates. Maximal degree in co-relation 47979. Up to 5920 conditions per place. [2024-05-12 10:37:40,466 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 261 selfloop transitions, 93 changer transitions 0/369 dead transitions. [2024-05-12 10:37:40,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 369 transitions, 6907 flow [2024-05-12 10:37:40,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 10:37:40,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 10:37:40,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 221 transitions. [2024-05-12 10:37:40,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.533816425120773 [2024-05-12 10:37:40,469 INFO L175 Difference]: Start difference. First operand has 273 places, 350 transitions, 6029 flow. Second operand 9 states and 221 transitions. [2024-05-12 10:37:40,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 369 transitions, 6907 flow [2024-05-12 10:37:41,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 369 transitions, 6571 flow, removed 36 selfloop flow, removed 11 redundant places. [2024-05-12 10:37:41,382 INFO L231 Difference]: Finished difference. Result has 271 places, 350 transitions, 5887 flow [2024-05-12 10:37:41,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5695, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5887, PETRI_PLACES=271, PETRI_TRANSITIONS=350} [2024-05-12 10:37:41,383 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 221 predicate places. [2024-05-12 10:37:41,383 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 350 transitions, 5887 flow [2024-05-12 10:37:41,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:37:41,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:37:41,384 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:37:41,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-05-12 10:37:41,384 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:37:41,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:37:41,384 INFO L85 PathProgramCache]: Analyzing trace with hash -369034021, now seen corresponding path program 6 times [2024-05-12 10:37:41,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:37:41,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379594721] [2024-05-12 10:37:41,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:37:41,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:37:41,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:37:41,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:37:41,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:37:41,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379594721] [2024-05-12 10:37:41,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379594721] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:37:41,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:37:41,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 10:37:41,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594562669] [2024-05-12 10:37:41,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:37:41,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 10:37:41,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:37:41,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 10:37:41,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-05-12 10:37:41,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:37:41,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 350 transitions, 5887 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:37:41,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:37:41,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:37:41,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:37:42,747 INFO L124 PetriNetUnfolderBase]: 4188/6998 cut-off events. [2024-05-12 10:37:42,747 INFO L125 PetriNetUnfolderBase]: For 226946/227584 co-relation queries the response was YES. [2024-05-12 10:37:42,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47768 conditions, 6998 events. 4188/6998 cut-off events. For 226946/227584 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 48639 event pairs, 1263 based on Foata normal form. 165/6836 useless extension candidates. Maximal degree in co-relation 47642. Up to 5917 conditions per place. [2024-05-12 10:37:42,955 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 260 selfloop transitions, 93 changer transitions 0/368 dead transitions. [2024-05-12 10:37:42,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 368 transitions, 6645 flow [2024-05-12 10:37:42,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 10:37:42,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 10:37:42,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 218 transitions. [2024-05-12 10:37:42,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5265700483091788 [2024-05-12 10:37:42,957 INFO L175 Difference]: Start difference. First operand has 271 places, 350 transitions, 5887 flow. Second operand 9 states and 218 transitions. [2024-05-12 10:37:42,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 368 transitions, 6645 flow [2024-05-12 10:37:43,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 368 transitions, 6315 flow, removed 26 selfloop flow, removed 9 redundant places. [2024-05-12 10:37:43,759 INFO L231 Difference]: Finished difference. Result has 271 places, 350 transitions, 5749 flow [2024-05-12 10:37:43,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5557, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5749, PETRI_PLACES=271, PETRI_TRANSITIONS=350} [2024-05-12 10:37:43,759 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 221 predicate places. [2024-05-12 10:37:43,760 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 350 transitions, 5749 flow [2024-05-12 10:37:43,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:37:43,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:37:43,760 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:37:43,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-05-12 10:37:43,760 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:37:43,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:37:43,761 INFO L85 PathProgramCache]: Analyzing trace with hash -217463025, now seen corresponding path program 4 times [2024-05-12 10:37:43,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:37:43,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212672098] [2024-05-12 10:37:43,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:37:43,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:37:43,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:37:44,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:37:44,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:37:44,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212672098] [2024-05-12 10:37:44,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212672098] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:37:44,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:37:44,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 10:37:44,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253029857] [2024-05-12 10:37:44,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:37:44,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 10:37:44,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:37:44,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 10:37:44,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-05-12 10:37:44,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:37:44,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 350 transitions, 5749 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:37:44,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:37:44,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:37:44,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:37:45,258 INFO L124 PetriNetUnfolderBase]: 4205/7024 cut-off events. [2024-05-12 10:37:45,258 INFO L125 PetriNetUnfolderBase]: For 226881/227506 co-relation queries the response was YES. [2024-05-12 10:37:45,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47278 conditions, 7024 events. 4205/7024 cut-off events. For 226881/227506 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 48796 event pairs, 1263 based on Foata normal form. 210/6903 useless extension candidates. Maximal degree in co-relation 47152. Up to 5714 conditions per place. [2024-05-12 10:37:45,332 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 166 selfloop transitions, 200 changer transitions 0/381 dead transitions. [2024-05-12 10:37:45,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 381 transitions, 7015 flow [2024-05-12 10:37:45,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-05-12 10:37:45,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-05-12 10:37:45,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 308 transitions. [2024-05-12 10:37:45,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5150501672240803 [2024-05-12 10:37:45,334 INFO L175 Difference]: Start difference. First operand has 271 places, 350 transitions, 5749 flow. Second operand 13 states and 308 transitions. [2024-05-12 10:37:45,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 381 transitions, 7015 flow [2024-05-12 10:37:46,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 381 transitions, 6745 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-05-12 10:37:46,255 INFO L231 Difference]: Finished difference. Result has 274 places, 356 transitions, 5999 flow [2024-05-12 10:37:46,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5479, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=194, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5999, PETRI_PLACES=274, PETRI_TRANSITIONS=356} [2024-05-12 10:37:46,256 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 224 predicate places. [2024-05-12 10:37:46,256 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 356 transitions, 5999 flow [2024-05-12 10:37:46,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:37:46,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:37:46,257 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:37:46,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-05-12 10:37:46,257 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:37:46,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:37:46,257 INFO L85 PathProgramCache]: Analyzing trace with hash -1917931637, now seen corresponding path program 5 times [2024-05-12 10:37:46,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:37:46,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679808405] [2024-05-12 10:37:46,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:37:46,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:37:46,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:37:46,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:37:46,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:37:46,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679808405] [2024-05-12 10:37:46,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679808405] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:37:46,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:37:46,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 10:37:46,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089020844] [2024-05-12 10:37:46,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:37:46,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 10:37:46,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:37:46,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 10:37:46,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-05-12 10:37:46,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:37:46,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 356 transitions, 5999 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:37:46,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:37:46,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:37:46,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:37:47,755 INFO L124 PetriNetUnfolderBase]: 4199/7016 cut-off events. [2024-05-12 10:37:47,755 INFO L125 PetriNetUnfolderBase]: For 229900/230534 co-relation queries the response was YES. [2024-05-12 10:37:47,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47474 conditions, 7016 events. 4199/7016 cut-off events. For 229900/230534 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 48733 event pairs, 1263 based on Foata normal form. 248/6933 useless extension candidates. Maximal degree in co-relation 47347. Up to 5927 conditions per place. [2024-05-12 10:37:47,833 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 234 selfloop transitions, 130 changer transitions 0/379 dead transitions. [2024-05-12 10:37:47,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 379 transitions, 6909 flow [2024-05-12 10:37:47,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-05-12 10:37:47,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-05-12 10:37:47,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 312 transitions. [2024-05-12 10:37:47,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5217391304347826 [2024-05-12 10:37:47,835 INFO L175 Difference]: Start difference. First operand has 274 places, 356 transitions, 5999 flow. Second operand 13 states and 312 transitions. [2024-05-12 10:37:47,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 379 transitions, 6909 flow [2024-05-12 10:37:48,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 379 transitions, 6500 flow, removed 29 selfloop flow, removed 9 redundant places. [2024-05-12 10:37:48,764 INFO L231 Difference]: Finished difference. Result has 278 places, 356 transitions, 5861 flow [2024-05-12 10:37:48,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5590, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5861, PETRI_PLACES=278, PETRI_TRANSITIONS=356} [2024-05-12 10:37:48,765 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 228 predicate places. [2024-05-12 10:37:48,765 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 356 transitions, 5861 flow [2024-05-12 10:37:48,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:37:48,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:37:48,765 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] [2024-05-12 10:37:48,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-05-12 10:37:48,765 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:37:48,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:37:48,767 INFO L85 PathProgramCache]: Analyzing trace with hash -369022675, now seen corresponding path program 5 times [2024-05-12 10:37:48,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:37:48,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705626217] [2024-05-12 10:37:48,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:37:48,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:37:48,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:37:49,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:37:49,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:37:49,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705626217] [2024-05-12 10:37:49,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705626217] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:37:49,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:37:49,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 10:37:49,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928933806] [2024-05-12 10:37:49,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:37:49,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 10:37:49,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:37:49,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 10:37:49,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-05-12 10:37:49,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:37:49,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 356 transitions, 5861 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:37:49,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:37:49,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:37:49,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:37:50,251 INFO L124 PetriNetUnfolderBase]: 4196/7012 cut-off events. [2024-05-12 10:37:50,251 INFO L125 PetriNetUnfolderBase]: For 229843/230464 co-relation queries the response was YES. [2024-05-12 10:37:50,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47180 conditions, 7012 events. 4196/7012 cut-off events. For 229843/230464 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 48715 event pairs, 1263 based on Foata normal form. 210/6891 useless extension candidates. Maximal degree in co-relation 47052. Up to 5707 conditions per place. [2024-05-12 10:37:50,328 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 164 selfloop transitions, 199 changer transitions 0/378 dead transitions. [2024-05-12 10:37:50,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 378 transitions, 6891 flow [2024-05-12 10:37:50,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 10:37:50,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 10:37:50,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 267 transitions. [2024-05-12 10:37:50,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5276679841897233 [2024-05-12 10:37:50,333 INFO L175 Difference]: Start difference. First operand has 278 places, 356 transitions, 5861 flow. Second operand 11 states and 267 transitions. [2024-05-12 10:37:50,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 378 transitions, 6891 flow [2024-05-12 10:37:51,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 378 transitions, 6615 flow, removed 18 selfloop flow, removed 12 redundant places. [2024-05-12 10:37:51,242 INFO L231 Difference]: Finished difference. Result has 277 places, 356 transitions, 5993 flow [2024-05-12 10:37:51,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5589, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=199, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5993, PETRI_PLACES=277, PETRI_TRANSITIONS=356} [2024-05-12 10:37:51,242 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 227 predicate places. [2024-05-12 10:37:51,243 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 356 transitions, 5993 flow [2024-05-12 10:37:51,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:37:51,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:37:51,243 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:37:51,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-05-12 10:37:51,243 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:37:51,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:37:51,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1039702159, now seen corresponding path program 6 times [2024-05-12 10:37:51,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:37:51,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868002082] [2024-05-12 10:37:51,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:37:51,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:37:51,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:37:51,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:37:51,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:37:51,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868002082] [2024-05-12 10:37:51,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868002082] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:37:51,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:37:51,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:37:51,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553980734] [2024-05-12 10:37:51,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:37:51,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:37:51,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:37:51,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:37:51,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:37:51,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:37:51,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 356 transitions, 5993 flow. Second operand has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:37:51,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:37:51,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:37:51,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:37:52,573 INFO L124 PetriNetUnfolderBase]: 4193/7008 cut-off events. [2024-05-12 10:37:52,574 INFO L125 PetriNetUnfolderBase]: For 229386/230006 co-relation queries the response was YES. [2024-05-12 10:37:52,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47338 conditions, 7008 events. 4193/7008 cut-off events. For 229386/230006 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 48654 event pairs, 1263 based on Foata normal form. 121/6798 useless extension candidates. Maximal degree in co-relation 47210. Up to 5960 conditions per place. [2024-05-12 10:37:52,649 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 261 selfloop transitions, 98 changer transitions 0/374 dead transitions. [2024-05-12 10:37:52,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 374 transitions, 6903 flow [2024-05-12 10:37:52,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 10:37:52,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 10:37:52,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 219 transitions. [2024-05-12 10:37:52,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5289855072463768 [2024-05-12 10:37:52,650 INFO L175 Difference]: Start difference. First operand has 277 places, 356 transitions, 5993 flow. Second operand 9 states and 219 transitions. [2024-05-12 10:37:52,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 374 transitions, 6903 flow [2024-05-12 10:37:53,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 374 transitions, 6608 flow, removed 15 selfloop flow, removed 9 redundant places. [2024-05-12 10:37:53,487 INFO L231 Difference]: Finished difference. Result has 278 places, 358 transitions, 5959 flow [2024-05-12 10:37:53,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5700, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5959, PETRI_PLACES=278, PETRI_TRANSITIONS=358} [2024-05-12 10:37:53,488 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 228 predicate places. [2024-05-12 10:37:53,488 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 358 transitions, 5959 flow [2024-05-12 10:37:53,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:37:53,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:37:53,488 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] [2024-05-12 10:37:53,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-05-12 10:37:53,488 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:37:53,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:37:53,489 INFO L85 PathProgramCache]: Analyzing trace with hash -1698244899, now seen corresponding path program 6 times [2024-05-12 10:37:53,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:37:53,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680616196] [2024-05-12 10:37:53,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:37:53,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:37:53,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:37:53,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:37:53,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:37:53,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680616196] [2024-05-12 10:37:53,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680616196] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:37:53,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:37:53,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:37:53,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372841568] [2024-05-12 10:37:53,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:37:53,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:37:53,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:37:53,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:37:53,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:37:53,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:37:53,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 358 transitions, 5959 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:37:53,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:37:53,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:37:53,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:37:55,057 INFO L124 PetriNetUnfolderBase]: 4200/7019 cut-off events. [2024-05-12 10:37:55,058 INFO L125 PetriNetUnfolderBase]: For 235064/235748 co-relation queries the response was YES. [2024-05-12 10:37:55,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47401 conditions, 7019 events. 4200/7019 cut-off events. For 235064/235748 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 48801 event pairs, 1263 based on Foata normal form. 162/6848 useless extension candidates. Maximal degree in co-relation 47271. Up to 6084 conditions per place. [2024-05-12 10:37:55,119 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 321 selfloop transitions, 45 changer transitions 0/381 dead transitions. [2024-05-12 10:37:55,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 381 transitions, 6833 flow [2024-05-12 10:37:55,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:37:55,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:37:55,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-05-12 10:37:55,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5434782608695652 [2024-05-12 10:37:55,120 INFO L175 Difference]: Start difference. First operand has 278 places, 358 transitions, 5959 flow. Second operand 8 states and 200 transitions. [2024-05-12 10:37:55,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 381 transitions, 6833 flow [2024-05-12 10:37:56,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 381 transitions, 6672 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-05-12 10:37:56,078 INFO L231 Difference]: Finished difference. Result has 280 places, 361 transitions, 5982 flow [2024-05-12 10:37:56,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5798, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5982, PETRI_PLACES=280, PETRI_TRANSITIONS=361} [2024-05-12 10:37:56,079 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 230 predicate places. [2024-05-12 10:37:56,079 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 361 transitions, 5982 flow [2024-05-12 10:37:56,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:37:56,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:37:56,080 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] [2024-05-12 10:37:56,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-05-12 10:37:56,080 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:37:56,080 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:37:56,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1705596549, now seen corresponding path program 7 times [2024-05-12 10:37:56,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:37:56,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719068335] [2024-05-12 10:37:56,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:37:56,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:37:56,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:37:56,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:37:56,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:37:56,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719068335] [2024-05-12 10:37:56,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719068335] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:37:56,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:37:56,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:37:56,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219384245] [2024-05-12 10:37:56,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:37:56,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:37:56,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:37:56,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:37:56,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:37:56,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:37:56,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 361 transitions, 5982 flow. Second operand has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 7 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:37:56,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:37:56,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:37:56,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:37:57,406 INFO L124 PetriNetUnfolderBase]: 4207/7030 cut-off events. [2024-05-12 10:37:57,407 INFO L125 PetriNetUnfolderBase]: For 240423/241127 co-relation queries the response was YES. [2024-05-12 10:37:57,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47466 conditions, 7030 events. 4207/7030 cut-off events. For 240423/241127 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 48893 event pairs, 1263 based on Foata normal form. 226/6921 useless extension candidates. Maximal degree in co-relation 47335. Up to 6010 conditions per place. [2024-05-12 10:37:57,489 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 279 selfloop transitions, 89 changer transitions 0/383 dead transitions. [2024-05-12 10:37:57,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 383 transitions, 6986 flow [2024-05-12 10:37:57,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:37:57,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:37:57,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 208 transitions. [2024-05-12 10:37:57,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5652173913043478 [2024-05-12 10:37:57,490 INFO L175 Difference]: Start difference. First operand has 280 places, 361 transitions, 5982 flow. Second operand 8 states and 208 transitions. [2024-05-12 10:37:57,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 383 transitions, 6986 flow [2024-05-12 10:37:58,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 383 transitions, 6866 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-05-12 10:37:58,532 INFO L231 Difference]: Finished difference. Result has 281 places, 364 transitions, 6147 flow [2024-05-12 10:37:58,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5862, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6147, PETRI_PLACES=281, PETRI_TRANSITIONS=364} [2024-05-12 10:37:58,532 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 231 predicate places. [2024-05-12 10:37:58,532 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 364 transitions, 6147 flow [2024-05-12 10:37:58,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 7 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:37:58,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:37:58,533 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:37:58,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-05-12 10:37:58,533 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:37:58,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:37:58,533 INFO L85 PathProgramCache]: Analyzing trace with hash -1576564133, now seen corresponding path program 7 times [2024-05-12 10:37:58,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:37:58,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630499450] [2024-05-12 10:37:58,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:37:58,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:37:58,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:37:58,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:37:58,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:37:58,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630499450] [2024-05-12 10:37:58,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630499450] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:37:58,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:37:58,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:37:58,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143603347] [2024-05-12 10:37:58,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:37:58,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:37:58,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:37:58,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:37:58,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:37:58,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:37:58,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 364 transitions, 6147 flow. Second operand has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:37:58,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:37:58,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:37:58,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:38:00,030 INFO L124 PetriNetUnfolderBase]: 4214/7041 cut-off events. [2024-05-12 10:38:00,030 INFO L125 PetriNetUnfolderBase]: For 246345/247048 co-relation queries the response was YES. [2024-05-12 10:38:00,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47768 conditions, 7041 events. 4214/7041 cut-off events. For 246345/247048 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 49013 event pairs, 1263 based on Foata normal form. 162/6866 useless extension candidates. Maximal degree in co-relation 47638. Up to 6011 conditions per place. [2024-05-12 10:38:00,103 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 304 selfloop transitions, 75 changer transitions 0/394 dead transitions. [2024-05-12 10:38:00,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 394 transitions, 7175 flow [2024-05-12 10:38:00,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 10:38:00,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 10:38:00,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 265 transitions. [2024-05-12 10:38:00,104 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5237154150197628 [2024-05-12 10:38:00,104 INFO L175 Difference]: Start difference. First operand has 281 places, 364 transitions, 6147 flow. Second operand 11 states and 265 transitions. [2024-05-12 10:38:00,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 394 transitions, 7175 flow [2024-05-12 10:38:01,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 394 transitions, 6891 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-05-12 10:38:01,042 INFO L231 Difference]: Finished difference. Result has 284 places, 367 transitions, 6085 flow [2024-05-12 10:38:01,043 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5865, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6085, PETRI_PLACES=284, PETRI_TRANSITIONS=367} [2024-05-12 10:38:01,043 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 234 predicate places. [2024-05-12 10:38:01,043 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 367 transitions, 6085 flow [2024-05-12 10:38:01,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:38:01,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:38:01,043 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:38:01,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-05-12 10:38:01,044 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:38:01,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:38:01,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1576552787, now seen corresponding path program 8 times [2024-05-12 10:38:01,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:38:01,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714285531] [2024-05-12 10:38:01,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:38:01,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:38:01,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:38:01,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:38:01,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:38:01,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714285531] [2024-05-12 10:38:01,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714285531] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:38:01,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:38:01,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:38:01,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697404557] [2024-05-12 10:38:01,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:38:01,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:38:01,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:38:01,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:38:01,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:38:01,396 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:38:01,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 367 transitions, 6085 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:38:01,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:38:01,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:38:01,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:38:02,485 INFO L124 PetriNetUnfolderBase]: 4211/7037 cut-off events. [2024-05-12 10:38:02,485 INFO L125 PetriNetUnfolderBase]: For 242981/243691 co-relation queries the response was YES. [2024-05-12 10:38:02,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47551 conditions, 7037 events. 4211/7037 cut-off events. For 242981/243691 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 48919 event pairs, 1263 based on Foata normal form. 133/6833 useless extension candidates. Maximal degree in co-relation 47420. Up to 6016 conditions per place. [2024-05-12 10:38:02,563 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 278 selfloop transitions, 87 changer transitions 0/380 dead transitions. [2024-05-12 10:38:02,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 380 transitions, 6853 flow [2024-05-12 10:38:02,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:38:02,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:38:02,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-05-12 10:38:02,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5496894409937888 [2024-05-12 10:38:02,564 INFO L175 Difference]: Start difference. First operand has 284 places, 367 transitions, 6085 flow. Second operand 7 states and 177 transitions. [2024-05-12 10:38:02,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 380 transitions, 6853 flow [2024-05-12 10:38:03,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 380 transitions, 6533 flow, removed 31 selfloop flow, removed 11 redundant places. [2024-05-12 10:38:03,573 INFO L231 Difference]: Finished difference. Result has 280 places, 367 transitions, 5956 flow [2024-05-12 10:38:03,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5765, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5956, PETRI_PLACES=280, PETRI_TRANSITIONS=367} [2024-05-12 10:38:03,574 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 230 predicate places. [2024-05-12 10:38:03,574 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 367 transitions, 5956 flow [2024-05-12 10:38:03,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:38:03,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:38:03,574 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:38:03,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-05-12 10:38:03,574 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:38:03,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:38:03,575 INFO L85 PathProgramCache]: Analyzing trace with hash -1576552973, now seen corresponding path program 8 times [2024-05-12 10:38:03,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:38:03,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122442425] [2024-05-12 10:38:03,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:38:03,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:38:03,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:38:03,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:38:03,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:38:03,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122442425] [2024-05-12 10:38:03,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122442425] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:38:03,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:38:03,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:38:03,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689835460] [2024-05-12 10:38:03,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:38:03,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:38:03,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:38:03,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:38:03,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:38:03,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:38:03,900 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 367 transitions, 5956 flow. Second operand has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:38:03,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:38:03,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:38:03,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:38:04,986 INFO L124 PetriNetUnfolderBase]: 4208/7033 cut-off events. [2024-05-12 10:38:04,986 INFO L125 PetriNetUnfolderBase]: For 244996/245691 co-relation queries the response was YES. [2024-05-12 10:38:05,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47389 conditions, 7033 events. 4208/7033 cut-off events. For 244996/245691 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 48866 event pairs, 1263 based on Foata normal form. 162/6858 useless extension candidates. Maximal degree in co-relation 47257. Up to 6004 conditions per place. [2024-05-12 10:38:05,066 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 299 selfloop transitions, 74 changer transitions 0/388 dead transitions. [2024-05-12 10:38:05,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 388 transitions, 6764 flow [2024-05-12 10:38:05,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 10:38:05,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 10:38:05,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 222 transitions. [2024-05-12 10:38:05,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5362318840579711 [2024-05-12 10:38:05,067 INFO L175 Difference]: Start difference. First operand has 280 places, 367 transitions, 5956 flow. Second operand 9 states and 222 transitions. [2024-05-12 10:38:05,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 388 transitions, 6764 flow [2024-05-12 10:38:06,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 388 transitions, 6571 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-05-12 10:38:06,025 INFO L231 Difference]: Finished difference. Result has 284 places, 367 transitions, 5917 flow [2024-05-12 10:38:06,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5763, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5917, PETRI_PLACES=284, PETRI_TRANSITIONS=367} [2024-05-12 10:38:06,026 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 234 predicate places. [2024-05-12 10:38:06,026 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 367 transitions, 5917 flow [2024-05-12 10:38:06,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:38:06,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:38:06,026 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:38:06,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-05-12 10:38:06,027 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:38:06,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:38:06,027 INFO L85 PathProgramCache]: Analyzing trace with hash -1568791007, now seen corresponding path program 9 times [2024-05-12 10:38:06,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:38:06,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392788900] [2024-05-12 10:38:06,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:38:06,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:38:06,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:38:06,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:38:06,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:38:06,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392788900] [2024-05-12 10:38:06,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392788900] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:38:06,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:38:06,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:38:06,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855596405] [2024-05-12 10:38:06,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:38:06,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:38:06,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:38:06,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:38:06,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:38:06,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:38:06,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 367 transitions, 5917 flow. Second operand has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 7 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:38:06,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:38:06,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:38:06,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:38:07,561 INFO L124 PetriNetUnfolderBase]: 4215/7042 cut-off events. [2024-05-12 10:38:07,561 INFO L125 PetriNetUnfolderBase]: For 244859/245611 co-relation queries the response was YES. [2024-05-12 10:38:07,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47458 conditions, 7042 events. 4215/7042 cut-off events. For 244859/245611 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 48995 event pairs, 1271 based on Foata normal form. 200/6903 useless extension candidates. Maximal degree in co-relation 47325. Up to 5966 conditions per place. [2024-05-12 10:38:07,629 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 257 selfloop transitions, 116 changer transitions 0/388 dead transitions. [2024-05-12 10:38:07,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 388 transitions, 6895 flow [2024-05-12 10:38:07,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:38:07,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:38:07,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 186 transitions. [2024-05-12 10:38:07,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.577639751552795 [2024-05-12 10:38:07,630 INFO L175 Difference]: Start difference. First operand has 284 places, 367 transitions, 5917 flow. Second operand 7 states and 186 transitions. [2024-05-12 10:38:07,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 388 transitions, 6895 flow [2024-05-12 10:38:08,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 388 transitions, 6747 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-05-12 10:38:08,613 INFO L231 Difference]: Finished difference. Result has 283 places, 370 transitions, 6057 flow [2024-05-12 10:38:08,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5769, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6057, PETRI_PLACES=283, PETRI_TRANSITIONS=370} [2024-05-12 10:38:08,614 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 233 predicate places. [2024-05-12 10:38:08,614 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 370 transitions, 6057 flow [2024-05-12 10:38:08,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 7 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:38:08,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:38:08,614 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:38:08,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-05-12 10:38:08,614 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:38:08,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:38:08,615 INFO L85 PathProgramCache]: Analyzing trace with hash -2094959199, now seen corresponding path program 10 times [2024-05-12 10:38:08,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:38:08,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039841188] [2024-05-12 10:38:08,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:38:08,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:38:08,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:38:08,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:38:08,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:38:08,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039841188] [2024-05-12 10:38:08,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039841188] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:38:08,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:38:08,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:38:08,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582069946] [2024-05-12 10:38:08,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:38:08,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:38:08,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:38:08,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:38:08,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:38:08,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:38:08,894 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 370 transitions, 6057 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:38:08,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:38:08,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:38:08,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:38:09,950 INFO L124 PetriNetUnfolderBase]: 4222/7051 cut-off events. [2024-05-12 10:38:09,951 INFO L125 PetriNetUnfolderBase]: For 250719/251410 co-relation queries the response was YES. [2024-05-12 10:38:10,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47762 conditions, 7051 events. 4222/7051 cut-off events. For 250719/251410 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 49007 event pairs, 1271 based on Foata normal form. 158/6868 useless extension candidates. Maximal degree in co-relation 47629. Up to 5886 conditions per place. [2024-05-12 10:38:10,029 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 221 selfloop transitions, 156 changer transitions 0/392 dead transitions. [2024-05-12 10:38:10,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 392 transitions, 7064 flow [2024-05-12 10:38:10,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:38:10,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:38:10,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 208 transitions. [2024-05-12 10:38:10,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5652173913043478 [2024-05-12 10:38:10,030 INFO L175 Difference]: Start difference. First operand has 283 places, 370 transitions, 6057 flow. Second operand 8 states and 208 transitions. [2024-05-12 10:38:10,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 392 transitions, 7064 flow [2024-05-12 10:38:10,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 392 transitions, 6830 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-05-12 10:38:10,979 INFO L231 Difference]: Finished difference. Result has 287 places, 373 transitions, 6208 flow [2024-05-12 10:38:10,979 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5823, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6208, PETRI_PLACES=287, PETRI_TRANSITIONS=373} [2024-05-12 10:38:10,980 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 237 predicate places. [2024-05-12 10:38:10,980 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 373 transitions, 6208 flow [2024-05-12 10:38:10,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:38:10,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:38:10,980 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:38:10,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-05-12 10:38:10,980 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:38:10,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:38:10,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1563659267, now seen corresponding path program 11 times [2024-05-12 10:38:10,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:38:10,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280212846] [2024-05-12 10:38:10,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:38:10,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:38:11,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:38:11,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:38:11,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:38:11,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280212846] [2024-05-12 10:38:11,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280212846] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:38:11,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:38:11,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:38:11,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042374827] [2024-05-12 10:38:11,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:38:11,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:38:11,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:38:11,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:38:11,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:38:11,284 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:38:11,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 373 transitions, 6208 flow. Second operand has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 7 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:38:11,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:38:11,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:38:11,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:38:12,525 INFO L124 PetriNetUnfolderBase]: 4229/7064 cut-off events. [2024-05-12 10:38:12,525 INFO L125 PetriNetUnfolderBase]: For 256923/257614 co-relation queries the response was YES. [2024-05-12 10:38:12,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48076 conditions, 7064 events. 4229/7064 cut-off events. For 256923/257614 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 49195 event pairs, 1262 based on Foata normal form. 142/6863 useless extension candidates. Maximal degree in co-relation 47942. Up to 5983 conditions per place. [2024-05-12 10:38:12,613 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 254 selfloop transitions, 123 changer transitions 0/392 dead transitions. [2024-05-12 10:38:12,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 392 transitions, 7196 flow [2024-05-12 10:38:12,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:38:12,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:38:12,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-05-12 10:38:12,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5516304347826086 [2024-05-12 10:38:12,615 INFO L175 Difference]: Start difference. First operand has 287 places, 373 transitions, 6208 flow. Second operand 8 states and 203 transitions. [2024-05-12 10:38:12,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 392 transitions, 7196 flow [2024-05-12 10:38:13,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 392 transitions, 6829 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-05-12 10:38:13,790 INFO L231 Difference]: Finished difference. Result has 289 places, 376 transitions, 6149 flow [2024-05-12 10:38:13,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5847, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6149, PETRI_PLACES=289, PETRI_TRANSITIONS=376} [2024-05-12 10:38:13,791 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 239 predicate places. [2024-05-12 10:38:13,791 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 376 transitions, 6149 flow [2024-05-12 10:38:13,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 7 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:38:13,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:38:13,791 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:38:13,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-05-12 10:38:13,791 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:38:13,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:38:13,792 INFO L85 PathProgramCache]: Analyzing trace with hash -1563665963, now seen corresponding path program 9 times [2024-05-12 10:38:13,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:38:13,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067751173] [2024-05-12 10:38:13,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:38:13,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:38:13,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:38:14,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:38:14,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:38:14,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067751173] [2024-05-12 10:38:14,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067751173] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:38:14,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:38:14,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:38:14,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675947045] [2024-05-12 10:38:14,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:38:14,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:38:14,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:38:14,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:38:14,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:38:14,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:38:14,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 376 transitions, 6149 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:38:14,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:38:14,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:38:14,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:38:15,178 INFO L124 PetriNetUnfolderBase]: 4268/7120 cut-off events. [2024-05-12 10:38:15,178 INFO L125 PetriNetUnfolderBase]: For 270253/270969 co-relation queries the response was YES. [2024-05-12 10:38:15,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48762 conditions, 7120 events. 4268/7120 cut-off events. For 270253/270969 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 49426 event pairs, 1271 based on Foata normal form. 171/6938 useless extension candidates. Maximal degree in co-relation 48627. Up to 5877 conditions per place. [2024-05-12 10:38:15,269 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 240 selfloop transitions, 153 changer transitions 0/408 dead transitions. [2024-05-12 10:38:15,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 408 transitions, 7569 flow [2024-05-12 10:38:15,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:38:15,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:38:15,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-05-12 10:38:15,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-05-12 10:38:15,271 INFO L175 Difference]: Start difference. First operand has 289 places, 376 transitions, 6149 flow. Second operand 8 states and 207 transitions. [2024-05-12 10:38:15,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 408 transitions, 7569 flow [2024-05-12 10:38:16,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 408 transitions, 7240 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-05-12 10:38:16,303 INFO L231 Difference]: Finished difference. Result has 291 places, 388 transitions, 6532 flow [2024-05-12 10:38:16,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=5820, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6532, PETRI_PLACES=291, PETRI_TRANSITIONS=388} [2024-05-12 10:38:16,304 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 241 predicate places. [2024-05-12 10:38:16,305 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 388 transitions, 6532 flow [2024-05-12 10:38:16,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:38:16,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:38:16,305 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:38:16,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-05-12 10:38:16,305 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:38:16,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:38:16,306 INFO L85 PathProgramCache]: Analyzing trace with hash -1563665777, now seen corresponding path program 12 times [2024-05-12 10:38:16,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:38:16,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835206843] [2024-05-12 10:38:16,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:38:16,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:38:16,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:38:16,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:38:16,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:38:16,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835206843] [2024-05-12 10:38:16,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835206843] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:38:16,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:38:16,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:38:16,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138637992] [2024-05-12 10:38:16,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:38:16,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:38:16,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:38:16,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:38:16,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:38:16,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:38:16,568 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 388 transitions, 6532 flow. Second operand has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 7 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:38:16,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:38:16,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:38:16,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:38:17,720 INFO L124 PetriNetUnfolderBase]: 4262/7112 cut-off events. [2024-05-12 10:38:17,721 INFO L125 PetriNetUnfolderBase]: For 275122/275884 co-relation queries the response was YES. [2024-05-12 10:38:17,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49167 conditions, 7112 events. 4262/7112 cut-off events. For 275122/275884 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 49392 event pairs, 1262 based on Foata normal form. 150/6909 useless extension candidates. Maximal degree in co-relation 49030. Up to 6027 conditions per place. [2024-05-12 10:38:17,807 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 268 selfloop transitions, 121 changer transitions 0/404 dead transitions. [2024-05-12 10:38:17,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 404 transitions, 7354 flow [2024-05-12 10:38:17,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 10:38:17,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 10:38:17,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 224 transitions. [2024-05-12 10:38:17,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5410628019323671 [2024-05-12 10:38:17,808 INFO L175 Difference]: Start difference. First operand has 291 places, 388 transitions, 6532 flow. Second operand 9 states and 224 transitions. [2024-05-12 10:38:17,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 404 transitions, 7354 flow [2024-05-12 10:38:19,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 404 transitions, 7192 flow, removed 51 selfloop flow, removed 3 redundant places. [2024-05-12 10:38:19,029 INFO L231 Difference]: Finished difference. Result has 297 places, 388 transitions, 6621 flow [2024-05-12 10:38:19,030 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6370, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6621, PETRI_PLACES=297, PETRI_TRANSITIONS=388} [2024-05-12 10:38:19,030 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 247 predicate places. [2024-05-12 10:38:19,030 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 388 transitions, 6621 flow [2024-05-12 10:38:19,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 7 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:38:19,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:38:19,031 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:38:19,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-05-12 10:38:19,031 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:38:19,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:38:19,031 INFO L85 PathProgramCache]: Analyzing trace with hash 1479067071, now seen corresponding path program 13 times [2024-05-12 10:38:19,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:38:19,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925812394] [2024-05-12 10:38:19,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:38:19,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:38:19,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:38:19,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:38:19,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:38:19,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925812394] [2024-05-12 10:38:19,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925812394] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:38:19,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:38:19,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 10:38:19,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985869084] [2024-05-12 10:38:19,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:38:19,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 10:38:19,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:38:19,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 10:38:19,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-05-12 10:38:19,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:38:19,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 388 transitions, 6621 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:38:19,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:38:19,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:38:19,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:38:20,474 INFO L124 PetriNetUnfolderBase]: 4269/7123 cut-off events. [2024-05-12 10:38:20,475 INFO L125 PetriNetUnfolderBase]: For 279011/279761 co-relation queries the response was YES. [2024-05-12 10:38:20,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49711 conditions, 7123 events. 4269/7123 cut-off events. For 279011/279761 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 49468 event pairs, 1271 based on Foata normal form. 202/6970 useless extension candidates. Maximal degree in co-relation 49572. Up to 5946 conditions per place. [2024-05-12 10:38:20,556 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 235 selfloop transitions, 161 changer transitions 0/411 dead transitions. [2024-05-12 10:38:20,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 411 transitions, 7676 flow [2024-05-12 10:38:20,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 10:38:20,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 10:38:20,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 232 transitions. [2024-05-12 10:38:20,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5603864734299517 [2024-05-12 10:38:20,557 INFO L175 Difference]: Start difference. First operand has 297 places, 388 transitions, 6621 flow. Second operand 9 states and 232 transitions. [2024-05-12 10:38:20,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 411 transitions, 7676 flow [2024-05-12 10:38:21,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 411 transitions, 7396 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-05-12 10:38:21,785 INFO L231 Difference]: Finished difference. Result has 297 places, 391 transitions, 6736 flow [2024-05-12 10:38:21,785 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6341, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6736, PETRI_PLACES=297, PETRI_TRANSITIONS=391} [2024-05-12 10:38:21,785 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 247 predicate places. [2024-05-12 10:38:21,785 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 391 transitions, 6736 flow [2024-05-12 10:38:21,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:38:21,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:38:21,786 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:38:21,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-05-12 10:38:21,786 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:38:21,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:38:21,787 INFO L85 PathProgramCache]: Analyzing trace with hash 1484192301, now seen corresponding path program 14 times [2024-05-12 10:38:21,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:38:21,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611109923] [2024-05-12 10:38:21,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:38:21,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:38:21,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:38:22,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:38:22,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:38:22,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611109923] [2024-05-12 10:38:22,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611109923] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:38:22,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:38:22,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:38:22,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998975435] [2024-05-12 10:38:22,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:38:22,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:38:22,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:38:22,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:38:22,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:38:22,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:38:22,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 391 transitions, 6736 flow. Second operand has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:38:22,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:38:22,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:38:22,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:38:23,273 INFO L124 PetriNetUnfolderBase]: 4276/7132 cut-off events. [2024-05-12 10:38:23,273 INFO L125 PetriNetUnfolderBase]: For 284937/285612 co-relation queries the response was YES. [2024-05-12 10:38:23,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50041 conditions, 7132 events. 4276/7132 cut-off events. For 284937/285612 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 49575 event pairs, 1271 based on Foata normal form. 188/6963 useless extension candidates. Maximal degree in co-relation 49901. Up to 5954 conditions per place. [2024-05-12 10:38:23,359 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 234 selfloop transitions, 168 changer transitions 0/417 dead transitions. [2024-05-12 10:38:23,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 417 transitions, 7817 flow [2024-05-12 10:38:23,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-05-12 10:38:23,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-05-12 10:38:23,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 292 transitions. [2024-05-12 10:38:23,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5289855072463768 [2024-05-12 10:38:23,361 INFO L175 Difference]: Start difference. First operand has 297 places, 391 transitions, 6736 flow. Second operand 12 states and 292 transitions. [2024-05-12 10:38:23,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 417 transitions, 7817 flow [2024-05-12 10:38:24,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 417 transitions, 7294 flow, removed 38 selfloop flow, removed 8 redundant places. [2024-05-12 10:38:24,696 INFO L231 Difference]: Finished difference. Result has 301 places, 394 transitions, 6628 flow [2024-05-12 10:38:24,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6235, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6628, PETRI_PLACES=301, PETRI_TRANSITIONS=394} [2024-05-12 10:38:24,696 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 251 predicate places. [2024-05-12 10:38:24,697 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 394 transitions, 6628 flow [2024-05-12 10:38:24,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:38:24,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:38:24,697 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] [2024-05-12 10:38:24,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-05-12 10:38:24,697 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:38:24,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:38:24,698 INFO L85 PathProgramCache]: Analyzing trace with hash 1484429451, now seen corresponding path program 15 times [2024-05-12 10:38:24,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:38:24,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122831193] [2024-05-12 10:38:24,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:38:24,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:38:24,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:38:24,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:38:24,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:38:24,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122831193] [2024-05-12 10:38:24,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122831193] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:38:24,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:38:24,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:38:24,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103565370] [2024-05-12 10:38:24,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:38:24,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:38:24,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:38:24,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:38:24,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:38:25,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:38:25,000 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 394 transitions, 6628 flow. Second operand has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:38:25,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:38:25,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:38:25,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:38:26,137 INFO L124 PetriNetUnfolderBase]: 4273/7128 cut-off events. [2024-05-12 10:38:26,137 INFO L125 PetriNetUnfolderBase]: For 285383/286070 co-relation queries the response was YES. [2024-05-12 10:38:26,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49676 conditions, 7128 events. 4273/7128 cut-off events. For 285383/286070 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 49493 event pairs, 1271 based on Foata normal form. 188/6959 useless extension candidates. Maximal degree in co-relation 49536. Up to 5951 conditions per place. [2024-05-12 10:38:26,219 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 234 selfloop transitions, 166 changer transitions 0/415 dead transitions. [2024-05-12 10:38:26,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 415 transitions, 7486 flow [2024-05-12 10:38:26,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 10:38:26,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 10:38:26,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 273 transitions. [2024-05-12 10:38:26,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5395256916996047 [2024-05-12 10:38:26,221 INFO L175 Difference]: Start difference. First operand has 301 places, 394 transitions, 6628 flow. Second operand 11 states and 273 transitions. [2024-05-12 10:38:26,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 415 transitions, 7486 flow [2024-05-12 10:38:27,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 415 transitions, 7106 flow, removed 28 selfloop flow, removed 9 redundant places. [2024-05-12 10:38:27,254 INFO L231 Difference]: Finished difference. Result has 303 places, 394 transitions, 6586 flow [2024-05-12 10:38:27,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6248, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=394, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6586, PETRI_PLACES=303, PETRI_TRANSITIONS=394} [2024-05-12 10:38:27,254 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 253 predicate places. [2024-05-12 10:38:27,254 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 394 transitions, 6586 flow [2024-05-12 10:38:27,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:38:27,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:38:27,255 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] [2024-05-12 10:38:27,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-05-12 10:38:27,255 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:38:27,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:38:27,255 INFO L85 PathProgramCache]: Analyzing trace with hash 1484192115, now seen corresponding path program 10 times [2024-05-12 10:38:27,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:38:27,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542581276] [2024-05-12 10:38:27,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:38:27,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:38:27,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:38:27,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:38:27,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:38:27,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542581276] [2024-05-12 10:38:27,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542581276] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:38:27,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:38:27,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:38:27,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493501830] [2024-05-12 10:38:27,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:38:27,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:38:27,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:38:27,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:38:27,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:38:27,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:38:27,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 394 transitions, 6586 flow. Second operand has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:38:27,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:38:27,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:38:27,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:38:28,701 INFO L124 PetriNetUnfolderBase]: 4270/7124 cut-off events. [2024-05-12 10:38:28,701 INFO L125 PetriNetUnfolderBase]: For 288038/288724 co-relation queries the response was YES. [2024-05-12 10:38:28,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49569 conditions, 7124 events. 4270/7124 cut-off events. For 288038/288724 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 49477 event pairs, 1271 based on Foata normal form. 142/6909 useless extension candidates. Maximal degree in co-relation 49428. Up to 5710 conditions per place. [2024-05-12 10:38:28,785 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 187 selfloop transitions, 216 changer transitions 0/418 dead transitions. [2024-05-12 10:38:28,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 418 transitions, 7832 flow [2024-05-12 10:38:28,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 10:38:28,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 10:38:28,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 229 transitions. [2024-05-12 10:38:28,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5531400966183575 [2024-05-12 10:38:28,787 INFO L175 Difference]: Start difference. First operand has 303 places, 394 transitions, 6586 flow. Second operand 9 states and 229 transitions. [2024-05-12 10:38:28,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 418 transitions, 7832 flow [2024-05-12 10:38:29,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 418 transitions, 7469 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-05-12 10:38:29,954 INFO L231 Difference]: Finished difference. Result has 301 places, 397 transitions, 6753 flow [2024-05-12 10:38:29,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6223, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=394, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=213, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6753, PETRI_PLACES=301, PETRI_TRANSITIONS=397} [2024-05-12 10:38:29,955 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 251 predicate places. [2024-05-12 10:38:29,955 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 397 transitions, 6753 flow [2024-05-12 10:38:29,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:38:29,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:38:29,955 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:38:29,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-05-12 10:38:29,956 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:38:29,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:38:29,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1206302391, now seen corresponding path program 11 times [2024-05-12 10:38:29,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:38:29,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257465935] [2024-05-12 10:38:29,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:38:29,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:38:29,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:38:30,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:38:30,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:38:30,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257465935] [2024-05-12 10:38:30,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257465935] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:38:30,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:38:30,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:38:30,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099521376] [2024-05-12 10:38:30,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:38:30,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:38:30,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:38:30,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:38:30,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:38:30,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:38:30,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 397 transitions, 6753 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:38:30,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:38:30,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:38:30,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:38:31,365 INFO L124 PetriNetUnfolderBase]: 4277/7135 cut-off events. [2024-05-12 10:38:31,366 INFO L125 PetriNetUnfolderBase]: For 297586/298309 co-relation queries the response was YES. [2024-05-12 10:38:31,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50080 conditions, 7135 events. 4277/7135 cut-off events. For 297586/298309 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 49558 event pairs, 1262 based on Foata normal form. 119/6895 useless extension candidates. Maximal degree in co-relation 49938. Up to 5888 conditions per place. [2024-05-12 10:38:31,453 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 248 selfloop transitions, 155 changer transitions 0/418 dead transitions. [2024-05-12 10:38:31,454 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 418 transitions, 7996 flow [2024-05-12 10:38:31,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 10:38:31,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 10:38:31,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 224 transitions. [2024-05-12 10:38:31,455 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5410628019323671 [2024-05-12 10:38:31,455 INFO L175 Difference]: Start difference. First operand has 301 places, 397 transitions, 6753 flow. Second operand 9 states and 224 transitions. [2024-05-12 10:38:31,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 418 transitions, 7996 flow [2024-05-12 10:38:32,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 418 transitions, 7445 flow, removed 42 selfloop flow, removed 7 redundant places. [2024-05-12 10:38:32,658 INFO L231 Difference]: Finished difference. Result has 303 places, 400 transitions, 6611 flow [2024-05-12 10:38:32,658 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6209, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6611, PETRI_PLACES=303, PETRI_TRANSITIONS=400} [2024-05-12 10:38:32,658 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 253 predicate places. [2024-05-12 10:38:32,659 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 400 transitions, 6611 flow [2024-05-12 10:38:32,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:38:32,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:38:32,659 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] [2024-05-12 10:38:32,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-05-12 10:38:32,659 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:38:32,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:38:32,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1029170871, now seen corresponding path program 12 times [2024-05-12 10:38:32,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:38:32,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678921178] [2024-05-12 10:38:32,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:38:32,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:38:32,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:38:32,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:38:32,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:38:32,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678921178] [2024-05-12 10:38:32,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678921178] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:38:32,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:38:32,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:38:32,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018051920] [2024-05-12 10:38:32,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:38:32,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:38:32,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:38:32,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:38:32,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:38:32,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:38:32,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 400 transitions, 6611 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:38:32,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:38:32,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:38:32,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:38:34,142 INFO L124 PetriNetUnfolderBase]: 4274/7131 cut-off events. [2024-05-12 10:38:34,142 INFO L125 PetriNetUnfolderBase]: For 296291/297008 co-relation queries the response was YES. [2024-05-12 10:38:34,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49787 conditions, 7131 events. 4274/7131 cut-off events. For 296291/297008 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 49474 event pairs, 1262 based on Foata normal form. 105/6877 useless extension candidates. Maximal degree in co-relation 49645. Up to 5886 conditions per place. [2024-05-12 10:38:34,226 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 251 selfloop transitions, 153 changer transitions 0/419 dead transitions. [2024-05-12 10:38:34,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 419 transitions, 7769 flow [2024-05-12 10:38:34,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 10:38:34,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 10:38:34,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 246 transitions. [2024-05-12 10:38:34,227 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5347826086956522 [2024-05-12 10:38:34,228 INFO L175 Difference]: Start difference. First operand has 303 places, 400 transitions, 6611 flow. Second operand 10 states and 246 transitions. [2024-05-12 10:38:34,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 419 transitions, 7769 flow [2024-05-12 10:38:35,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 419 transitions, 7391 flow, removed 59 selfloop flow, removed 6 redundant places. [2024-05-12 10:38:35,465 INFO L231 Difference]: Finished difference. Result has 307 places, 400 transitions, 6545 flow [2024-05-12 10:38:35,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6233, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6545, PETRI_PLACES=307, PETRI_TRANSITIONS=400} [2024-05-12 10:38:35,466 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 257 predicate places. [2024-05-12 10:38:35,466 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 400 transitions, 6545 flow [2024-05-12 10:38:35,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:38:35,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:38:35,466 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:38:35,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-05-12 10:38:35,467 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:38:35,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:38:35,467 INFO L85 PathProgramCache]: Analyzing trace with hash -1568929949, now seen corresponding path program 1 times [2024-05-12 10:38:35,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:38:35,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283479338] [2024-05-12 10:38:35,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:38:35,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:38:35,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:38:35,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:38:35,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:38:35,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283479338] [2024-05-12 10:38:35,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283479338] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:38:35,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:38:35,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:38:35,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730119878] [2024-05-12 10:38:35,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:38:35,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:38:35,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:38:35,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:38:35,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:38:35,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:38:35,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 400 transitions, 6545 flow. Second operand has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 7 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:38:35,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:38:35,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:38:35,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:38:36,959 INFO L124 PetriNetUnfolderBase]: 4397/7358 cut-off events. [2024-05-12 10:38:36,959 INFO L125 PetriNetUnfolderBase]: For 335075/335785 co-relation queries the response was YES. [2024-05-12 10:38:37,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51298 conditions, 7358 events. 4397/7358 cut-off events. For 335075/335785 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 51587 event pairs, 1289 based on Foata normal form. 49/7052 useless extension candidates. Maximal degree in co-relation 51155. Up to 6324 conditions per place. [2024-05-12 10:38:37,054 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 394 selfloop transitions, 29 changer transitions 0/438 dead transitions. [2024-05-12 10:38:37,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 438 transitions, 7772 flow [2024-05-12 10:38:37,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:38:37,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:38:37,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 190 transitions. [2024-05-12 10:38:37,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5900621118012422 [2024-05-12 10:38:37,055 INFO L175 Difference]: Start difference. First operand has 307 places, 400 transitions, 6545 flow. Second operand 7 states and 190 transitions. [2024-05-12 10:38:37,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 438 transitions, 7772 flow [2024-05-12 10:38:38,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 438 transitions, 7491 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-05-12 10:38:38,369 INFO L231 Difference]: Finished difference. Result has 308 places, 405 transitions, 6426 flow [2024-05-12 10:38:38,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6264, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6426, PETRI_PLACES=308, PETRI_TRANSITIONS=405} [2024-05-12 10:38:38,370 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 258 predicate places. [2024-05-12 10:38:38,370 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 405 transitions, 6426 flow [2024-05-12 10:38:38,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 7 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:38:38,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:38:38,370 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:38:38,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-05-12 10:38:38,370 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:38:38,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:38:38,371 INFO L85 PathProgramCache]: Analyzing trace with hash 2111303395, now seen corresponding path program 2 times [2024-05-12 10:38:38,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:38:38,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196775859] [2024-05-12 10:38:38,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:38:38,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:38:38,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:38:38,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:38:38,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:38:38,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196775859] [2024-05-12 10:38:38,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196775859] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:38:38,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:38:38,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:38:38,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041009142] [2024-05-12 10:38:38,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:38:38,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:38:38,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:38:38,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:38:38,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:38:38,679 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:38:38,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 405 transitions, 6426 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:38:38,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:38:38,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:38:38,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:38:39,908 INFO L124 PetriNetUnfolderBase]: 4516/7535 cut-off events. [2024-05-12 10:38:39,908 INFO L125 PetriNetUnfolderBase]: For 362787/363501 co-relation queries the response was YES. [2024-05-12 10:38:39,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52892 conditions, 7535 events. 4516/7535 cut-off events. For 362787/363501 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 53042 event pairs, 1368 based on Foata normal form. 49/7221 useless extension candidates. Maximal degree in co-relation 52747. Up to 6246 conditions per place. [2024-05-12 10:38:40,002 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 385 selfloop transitions, 48 changer transitions 0/448 dead transitions. [2024-05-12 10:38:40,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 448 transitions, 7709 flow [2024-05-12 10:38:40,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:38:40,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:38:40,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 212 transitions. [2024-05-12 10:38:40,003 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5760869565217391 [2024-05-12 10:38:40,003 INFO L175 Difference]: Start difference. First operand has 308 places, 405 transitions, 6426 flow. Second operand 8 states and 212 transitions. [2024-05-12 10:38:40,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 448 transitions, 7709 flow [2024-05-12 10:38:41,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 448 transitions, 7658 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-05-12 10:38:41,439 INFO L231 Difference]: Finished difference. Result has 314 places, 409 transitions, 6561 flow [2024-05-12 10:38:41,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6375, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6561, PETRI_PLACES=314, PETRI_TRANSITIONS=409} [2024-05-12 10:38:41,439 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 264 predicate places. [2024-05-12 10:38:41,439 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 409 transitions, 6561 flow [2024-05-12 10:38:41,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:38:41,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:38:41,440 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:38:41,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-05-12 10:38:41,440 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:38:41,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:38:41,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1568782079, now seen corresponding path program 3 times [2024-05-12 10:38:41,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:38:41,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757681968] [2024-05-12 10:38:41,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:38:41,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:38:41,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:38:41,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:38:41,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:38:41,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757681968] [2024-05-12 10:38:41,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757681968] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:38:41,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:38:41,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:38:41,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625127461] [2024-05-12 10:38:41,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:38:41,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:38:41,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:38:41,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:38:41,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:38:41,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:38:41,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 409 transitions, 6561 flow. Second operand has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 7 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:38:41,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:38:41,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:38:41,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:38:42,988 INFO L124 PetriNetUnfolderBase]: 4590/7672 cut-off events. [2024-05-12 10:38:42,988 INFO L125 PetriNetUnfolderBase]: For 379576/380296 co-relation queries the response was YES. [2024-05-12 10:38:43,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53978 conditions, 7672 events. 4590/7672 cut-off events. For 379576/380296 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 54267 event pairs, 1426 based on Foata normal form. 51/7350 useless extension candidates. Maximal degree in co-relation 53830. Up to 6750 conditions per place. [2024-05-12 10:38:43,082 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 393 selfloop transitions, 26 changer transitions 0/434 dead transitions. [2024-05-12 10:38:43,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 434 transitions, 7522 flow [2024-05-12 10:38:43,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:38:43,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:38:43,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-05-12 10:38:43,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.562111801242236 [2024-05-12 10:38:43,083 INFO L175 Difference]: Start difference. First operand has 314 places, 409 transitions, 6561 flow. Second operand 7 states and 181 transitions. [2024-05-12 10:38:43,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 434 transitions, 7522 flow [2024-05-12 10:38:44,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 434 transitions, 7425 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-05-12 10:38:44,821 INFO L231 Difference]: Finished difference. Result has 318 places, 410 transitions, 6544 flow [2024-05-12 10:38:44,821 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6464, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=409, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=383, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6544, PETRI_PLACES=318, PETRI_TRANSITIONS=410} [2024-05-12 10:38:44,821 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 268 predicate places. [2024-05-12 10:38:44,821 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 410 transitions, 6544 flow [2024-05-12 10:38:44,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 7 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:38:44,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:38:44,822 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:38:44,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-05-12 10:38:44,822 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:38:44,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:38:44,822 INFO L85 PathProgramCache]: Analyzing trace with hash -880900159, now seen corresponding path program 4 times [2024-05-12 10:38:44,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:38:44,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770555063] [2024-05-12 10:38:44,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:38:44,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:38:44,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:38:45,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:38:45,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:38:45,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770555063] [2024-05-12 10:38:45,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770555063] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:38:45,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:38:45,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:38:45,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197322658] [2024-05-12 10:38:45,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:38:45,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:38:45,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:38:45,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:38:45,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:38:45,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:38:45,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 410 transitions, 6544 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:38:45,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:38:45,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:38:45,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:38:46,429 INFO L124 PetriNetUnfolderBase]: 4735/7910 cut-off events. [2024-05-12 10:38:46,429 INFO L125 PetriNetUnfolderBase]: For 405974/406697 co-relation queries the response was YES. [2024-05-12 10:38:46,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55783 conditions, 7910 events. 4735/7910 cut-off events. For 405974/406697 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 56253 event pairs, 1449 based on Foata normal form. 49/7580 useless extension candidates. Maximal degree in co-relation 55633. Up to 6857 conditions per place. [2024-05-12 10:38:46,530 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 385 selfloop transitions, 44 changer transitions 0/444 dead transitions. [2024-05-12 10:38:46,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 444 transitions, 7751 flow [2024-05-12 10:38:46,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:38:46,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:38:46,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-05-12 10:38:46,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-05-12 10:38:46,531 INFO L175 Difference]: Start difference. First operand has 318 places, 410 transitions, 6544 flow. Second operand 8 states and 207 transitions. [2024-05-12 10:38:46,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 444 transitions, 7751 flow [2024-05-12 10:38:48,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 444 transitions, 7704 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-05-12 10:38:48,037 INFO L231 Difference]: Finished difference. Result has 323 places, 413 transitions, 6651 flow [2024-05-12 10:38:48,038 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6497, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6651, PETRI_PLACES=323, PETRI_TRANSITIONS=413} [2024-05-12 10:38:48,038 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 273 predicate places. [2024-05-12 10:38:48,038 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 413 transitions, 6651 flow [2024-05-12 10:38:48,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:38:48,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:38:48,039 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:38:48,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-05-12 10:38:48,039 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:38:48,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:38:48,039 INFO L85 PathProgramCache]: Analyzing trace with hash -2094950271, now seen corresponding path program 5 times [2024-05-12 10:38:48,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:38:48,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950717789] [2024-05-12 10:38:48,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:38:48,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:38:48,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:38:48,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:38:48,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:38:48,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950717789] [2024-05-12 10:38:48,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950717789] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:38:48,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:38:48,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:38:48,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330246407] [2024-05-12 10:38:48,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:38:48,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:38:48,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:38:48,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:38:48,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:38:48,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:38:48,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 413 transitions, 6651 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:38:48,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:38:48,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:38:48,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:38:49,682 INFO L124 PetriNetUnfolderBase]: 4717/7884 cut-off events. [2024-05-12 10:38:49,683 INFO L125 PetriNetUnfolderBase]: For 395850/396573 co-relation queries the response was YES. [2024-05-12 10:38:49,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55236 conditions, 7884 events. 4717/7884 cut-off events. For 395850/396573 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 56190 event pairs, 1468 based on Foata normal form. 51/7554 useless extension candidates. Maximal degree in co-relation 55084. Up to 6926 conditions per place. [2024-05-12 10:38:49,769 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 381 selfloop transitions, 43 changer transitions 0/439 dead transitions. [2024-05-12 10:38:49,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 439 transitions, 7626 flow [2024-05-12 10:38:49,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:38:49,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:38:49,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-05-12 10:38:49,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5461956521739131 [2024-05-12 10:38:49,784 INFO L175 Difference]: Start difference. First operand has 323 places, 413 transitions, 6651 flow. Second operand 8 states and 201 transitions. [2024-05-12 10:38:49,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 439 transitions, 7626 flow [2024-05-12 10:38:51,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 439 transitions, 7533 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-05-12 10:38:51,272 INFO L231 Difference]: Finished difference. Result has 327 places, 414 transitions, 6674 flow [2024-05-12 10:38:51,273 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6570, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=370, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6674, PETRI_PLACES=327, PETRI_TRANSITIONS=414} [2024-05-12 10:38:51,273 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 277 predicate places. [2024-05-12 10:38:51,273 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 414 transitions, 6674 flow [2024-05-12 10:38:51,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:38:51,273 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:38:51,273 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:38:51,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-05-12 10:38:51,274 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:38:51,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:38:51,274 INFO L85 PathProgramCache]: Analyzing trace with hash 1003578187, now seen corresponding path program 6 times [2024-05-12 10:38:51,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:38:51,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454069284] [2024-05-12 10:38:51,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:38:51,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:38:51,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:38:51,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:38:51,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:38:51,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454069284] [2024-05-12 10:38:51,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454069284] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:38:51,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:38:51,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:38:51,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877880931] [2024-05-12 10:38:51,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:38:51,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:38:51,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:38:51,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:38:51,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:38:51,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:38:51,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 414 transitions, 6674 flow. Second operand has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 7 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:38:51,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:38:51,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:38:51,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:38:52,846 INFO L124 PetriNetUnfolderBase]: 4699/7858 cut-off events. [2024-05-12 10:38:52,846 INFO L125 PetriNetUnfolderBase]: For 373878/374604 co-relation queries the response was YES. [2024-05-12 10:38:52,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54190 conditions, 7858 events. 4699/7858 cut-off events. For 373878/374604 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 55956 event pairs, 1459 based on Foata normal form. 51/7527 useless extension candidates. Maximal degree in co-relation 54036. Up to 6921 conditions per place. [2024-05-12 10:38:52,950 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 394 selfloop transitions, 27 changer transitions 0/436 dead transitions. [2024-05-12 10:38:52,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 436 transitions, 7610 flow [2024-05-12 10:38:52,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:38:52,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:38:52,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-05-12 10:38:52,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.532608695652174 [2024-05-12 10:38:52,952 INFO L175 Difference]: Start difference. First operand has 327 places, 414 transitions, 6674 flow. Second operand 8 states and 196 transitions. [2024-05-12 10:38:52,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 436 transitions, 7610 flow [2024-05-12 10:38:54,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 436 transitions, 7509 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-05-12 10:38:54,678 INFO L231 Difference]: Finished difference. Result has 329 places, 414 transitions, 6632 flow [2024-05-12 10:38:54,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6573, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6632, PETRI_PLACES=329, PETRI_TRANSITIONS=414} [2024-05-12 10:38:54,678 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 279 predicate places. [2024-05-12 10:38:54,678 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 414 transitions, 6632 flow [2024-05-12 10:38:54,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 7 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:38:54,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:38:54,679 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:38:54,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-05-12 10:38:54,679 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:38:54,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:38:54,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1478931849, now seen corresponding path program 7 times [2024-05-12 10:38:54,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:38:54,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62914043] [2024-05-12 10:38:54,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:38:54,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:38:54,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:38:54,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:38:54,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:38:54,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62914043] [2024-05-12 10:38:54,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62914043] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:38:54,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:38:54,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:38:54,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401205258] [2024-05-12 10:38:54,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:38:54,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:38:54,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:38:54,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:38:54,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:38:54,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:38:54,989 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 414 transitions, 6632 flow. Second operand has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:38:54,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:38:54,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:38:54,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:38:56,294 INFO L124 PetriNetUnfolderBase]: 4773/7987 cut-off events. [2024-05-12 10:38:56,294 INFO L125 PetriNetUnfolderBase]: For 381035/381758 co-relation queries the response was YES. [2024-05-12 10:38:56,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54786 conditions, 7987 events. 4773/7987 cut-off events. For 381035/381758 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 57079 event pairs, 1489 based on Foata normal form. 51/7652 useless extension candidates. Maximal degree in co-relation 54631. Up to 7014 conditions per place. [2024-05-12 10:38:56,399 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 383 selfloop transitions, 43 changer transitions 0/441 dead transitions. [2024-05-12 10:38:56,399 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 441 transitions, 7612 flow [2024-05-12 10:38:56,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 10:38:56,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 10:38:56,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 223 transitions. [2024-05-12 10:38:56,400 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.538647342995169 [2024-05-12 10:38:56,400 INFO L175 Difference]: Start difference. First operand has 329 places, 414 transitions, 6632 flow. Second operand 9 states and 223 transitions. [2024-05-12 10:38:56,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 441 transitions, 7612 flow [2024-05-12 10:38:58,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 441 transitions, 7559 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-05-12 10:38:58,385 INFO L231 Difference]: Finished difference. Result has 332 places, 415 transitions, 6694 flow [2024-05-12 10:38:58,400 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6579, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6694, PETRI_PLACES=332, PETRI_TRANSITIONS=415} [2024-05-12 10:38:58,400 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 282 predicate places. [2024-05-12 10:38:58,401 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 415 transitions, 6694 flow [2024-05-12 10:38:58,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:38:58,401 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:38:58,401 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:38:58,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-05-12 10:38:58,401 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:38:58,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:38:58,402 INFO L85 PathProgramCache]: Analyzing trace with hash -1872950367, now seen corresponding path program 8 times [2024-05-12 10:38:58,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:38:58,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017780318] [2024-05-12 10:38:58,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:38:58,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:38:58,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:38:58,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:38:58,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:38:58,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017780318] [2024-05-12 10:38:58,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017780318] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:38:58,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:38:58,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 10:38:58,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342059012] [2024-05-12 10:38:58,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:38:58,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 10:38:58,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:38:58,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 10:38:58,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-05-12 10:38:58,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:38:58,749 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 415 transitions, 6694 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:38:58,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:38:58,749 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:38:58,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:39:00,131 INFO L124 PetriNetUnfolderBase]: 4826/8075 cut-off events. [2024-05-12 10:39:00,132 INFO L125 PetriNetUnfolderBase]: For 384451/385177 co-relation queries the response was YES. [2024-05-12 10:39:00,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55580 conditions, 8075 events. 4826/8075 cut-off events. For 384451/385177 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 57850 event pairs, 1482 based on Foata normal form. 49/7736 useless extension candidates. Maximal degree in co-relation 55424. Up to 6922 conditions per place. [2024-05-12 10:39:00,236 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 389 selfloop transitions, 45 changer transitions 0/449 dead transitions. [2024-05-12 10:39:00,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 449 transitions, 7905 flow [2024-05-12 10:39:00,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 10:39:00,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 10:39:00,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 228 transitions. [2024-05-12 10:39:00,237 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5507246376811594 [2024-05-12 10:39:00,238 INFO L175 Difference]: Start difference. First operand has 332 places, 415 transitions, 6694 flow. Second operand 9 states and 228 transitions. [2024-05-12 10:39:00,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 449 transitions, 7905 flow [2024-05-12 10:39:02,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 449 transitions, 7808 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-05-12 10:39:02,386 INFO L231 Difference]: Finished difference. Result has 335 places, 417 transitions, 6738 flow [2024-05-12 10:39:02,386 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6597, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6738, PETRI_PLACES=335, PETRI_TRANSITIONS=417} [2024-05-12 10:39:02,386 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 285 predicate places. [2024-05-12 10:39:02,386 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 417 transitions, 6738 flow [2024-05-12 10:39:02,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:39:02,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:39:02,387 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:39:02,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-05-12 10:39:02,387 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:39:02,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:39:02,387 INFO L85 PathProgramCache]: Analyzing trace with hash 1484438379, now seen corresponding path program 9 times [2024-05-12 10:39:02,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:39:02,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072145127] [2024-05-12 10:39:02,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:39:02,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:39:02,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:39:02,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:39:02,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:39:02,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072145127] [2024-05-12 10:39:02,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072145127] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:39:02,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:39:02,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 10:39:02,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416660071] [2024-05-12 10:39:02,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:39:02,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 10:39:02,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:39:02,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 10:39:02,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-05-12 10:39:02,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:39:02,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 417 transitions, 6738 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:39:02,738 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:39:02,738 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:39:02,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:39:04,156 INFO L124 PetriNetUnfolderBase]: 4808/8049 cut-off events. [2024-05-12 10:39:04,157 INFO L125 PetriNetUnfolderBase]: For 369985/370714 co-relation queries the response was YES. [2024-05-12 10:39:04,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54817 conditions, 8049 events. 4808/8049 cut-off events. For 369985/370714 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 57631 event pairs, 1501 based on Foata normal form. 51/7709 useless extension candidates. Maximal degree in co-relation 54659. Up to 7071 conditions per place. [2024-05-12 10:39:04,264 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 387 selfloop transitions, 44 changer transitions 0/446 dead transitions. [2024-05-12 10:39:04,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 446 transitions, 7737 flow [2024-05-12 10:39:04,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 10:39:04,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 10:39:04,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 261 transitions. [2024-05-12 10:39:04,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5158102766798419 [2024-05-12 10:39:04,265 INFO L175 Difference]: Start difference. First operand has 335 places, 417 transitions, 6738 flow. Second operand 11 states and 261 transitions. [2024-05-12 10:39:04,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 446 transitions, 7737 flow [2024-05-12 10:39:06,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 446 transitions, 7527 flow, removed 26 selfloop flow, removed 9 redundant places. [2024-05-12 10:39:06,138 INFO L231 Difference]: Finished difference. Result has 337 places, 418 transitions, 6650 flow [2024-05-12 10:39:06,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6544, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6650, PETRI_PLACES=337, PETRI_TRANSITIONS=418} [2024-05-12 10:39:06,139 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 287 predicate places. [2024-05-12 10:39:06,139 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 418 transitions, 6650 flow [2024-05-12 10:39:06,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:39:06,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:39:06,139 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:39:06,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-05-12 10:39:06,140 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:39:06,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:39:06,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1563204497, now seen corresponding path program 1 times [2024-05-12 10:39:06,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:39:06,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89569230] [2024-05-12 10:39:06,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:39:06,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:39:06,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:39:06,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:39:06,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:39:06,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89569230] [2024-05-12 10:39:06,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89569230] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:39:06,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:39:06,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-05-12 10:39:06,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669498380] [2024-05-12 10:39:06,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:39:06,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-05-12 10:39:06,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:39:06,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-05-12 10:39:06,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-05-12 10:39:06,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:39:06,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 418 transitions, 6650 flow. Second operand has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 7 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:39:06,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:39:06,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:39:06,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:39:07,819 INFO L124 PetriNetUnfolderBase]: 4795/8058 cut-off events. [2024-05-12 10:39:07,820 INFO L125 PetriNetUnfolderBase]: For 341494/342220 co-relation queries the response was YES. [2024-05-12 10:39:07,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53252 conditions, 8058 events. 4795/8058 cut-off events. For 341494/342220 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 57908 event pairs, 1442 based on Foata normal form. 49/7723 useless extension candidates. Maximal degree in co-relation 53095. Up to 6847 conditions per place. [2024-05-12 10:39:07,921 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 396 selfloop transitions, 34 changer transitions 0/445 dead transitions. [2024-05-12 10:39:07,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 445 transitions, 7626 flow [2024-05-12 10:39:07,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:39:07,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:39:07,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-05-12 10:39:07,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5461956521739131 [2024-05-12 10:39:07,922 INFO L175 Difference]: Start difference. First operand has 337 places, 418 transitions, 6650 flow. Second operand 8 states and 201 transitions. [2024-05-12 10:39:07,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 445 transitions, 7626 flow [2024-05-12 10:39:09,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 445 transitions, 7537 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-05-12 10:39:09,247 INFO L231 Difference]: Finished difference. Result has 336 places, 418 transitions, 6635 flow [2024-05-12 10:39:09,250 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6561, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6635, PETRI_PLACES=336, PETRI_TRANSITIONS=418} [2024-05-12 10:39:09,250 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 286 predicate places. [2024-05-12 10:39:09,250 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 418 transitions, 6635 flow [2024-05-12 10:39:09,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 7 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:39:09,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:39:09,251 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:39:09,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-05-12 10:39:09,251 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:39:09,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:39:09,251 INFO L85 PathProgramCache]: Analyzing trace with hash 1484653581, now seen corresponding path program 2 times [2024-05-12 10:39:09,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:39:09,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048336311] [2024-05-12 10:39:09,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:39:09,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:39:09,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:39:09,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:39:09,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:39:09,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048336311] [2024-05-12 10:39:09,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048336311] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:39:09,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:39:09,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 10:39:09,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737798482] [2024-05-12 10:39:09,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:39:09,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 10:39:09,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:39:09,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 10:39:09,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-05-12 10:39:09,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:39:09,621 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 418 transitions, 6635 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:39:09,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:39:09,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:39:09,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:39:11,017 INFO L124 PetriNetUnfolderBase]: 4782/8011 cut-off events. [2024-05-12 10:39:11,017 INFO L125 PetriNetUnfolderBase]: For 325304/326030 co-relation queries the response was YES. [2024-05-12 10:39:11,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52722 conditions, 8011 events. 4782/8011 cut-off events. For 325304/326030 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 57385 event pairs, 1460 based on Foata normal form. 49/7672 useless extension candidates. Maximal degree in co-relation 52564. Up to 6876 conditions per place. [2024-05-12 10:39:11,131 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 388 selfloop transitions, 48 changer transitions 0/451 dead transitions. [2024-05-12 10:39:11,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 451 transitions, 7639 flow [2024-05-12 10:39:11,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 10:39:11,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 10:39:11,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 265 transitions. [2024-05-12 10:39:11,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5237154150197628 [2024-05-12 10:39:11,132 INFO L175 Difference]: Start difference. First operand has 336 places, 418 transitions, 6635 flow. Second operand 11 states and 265 transitions. [2024-05-12 10:39:11,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 451 transitions, 7639 flow [2024-05-12 10:39:12,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 451 transitions, 7548 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-05-12 10:39:13,000 INFO L231 Difference]: Finished difference. Result has 340 places, 418 transitions, 6644 flow [2024-05-12 10:39:13,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6544, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=370, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6644, PETRI_PLACES=340, PETRI_TRANSITIONS=418} [2024-05-12 10:39:13,000 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 290 predicate places. [2024-05-12 10:39:13,001 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 418 transitions, 6644 flow [2024-05-12 10:39:13,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:39:13,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:39:13,001 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] [2024-05-12 10:39:13,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-05-12 10:39:13,001 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:39:13,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:39:13,002 INFO L85 PathProgramCache]: Analyzing trace with hash 1639666190, now seen corresponding path program 1 times [2024-05-12 10:39:13,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:39:13,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390102003] [2024-05-12 10:39:13,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:39:13,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:39:13,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:39:13,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:39:13,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:39:13,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390102003] [2024-05-12 10:39:13,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390102003] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:39:13,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:39:13,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:39:13,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733115982] [2024-05-12 10:39:13,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:39:13,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:39:13,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:39:13,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:39:13,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:39:13,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:39:13,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 418 transitions, 6644 flow. Second operand has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:39:13,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:39:13,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:39:13,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:39:14,819 INFO L124 PetriNetUnfolderBase]: 4922/8286 cut-off events. [2024-05-12 10:39:14,819 INFO L125 PetriNetUnfolderBase]: For 362186/362901 co-relation queries the response was YES. [2024-05-12 10:39:14,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55666 conditions, 8286 events. 4922/8286 cut-off events. For 362186/362901 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 59728 event pairs, 955 based on Foata normal form. 95/8001 useless extension candidates. Maximal degree in co-relation 55507. Up to 5646 conditions per place. [2024-05-12 10:39:14,929 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 367 selfloop transitions, 76 changer transitions 0/458 dead transitions. [2024-05-12 10:39:14,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 458 transitions, 8208 flow [2024-05-12 10:39:14,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:39:14,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:39:14,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 213 transitions. [2024-05-12 10:39:14,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5788043478260869 [2024-05-12 10:39:14,930 INFO L175 Difference]: Start difference. First operand has 340 places, 418 transitions, 6644 flow. Second operand 8 states and 213 transitions. [2024-05-12 10:39:14,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 458 transitions, 8208 flow [2024-05-12 10:39:16,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 458 transitions, 8013 flow, removed 10 selfloop flow, removed 12 redundant places. [2024-05-12 10:39:16,667 INFO L231 Difference]: Finished difference. Result has 337 places, 423 transitions, 6785 flow [2024-05-12 10:39:16,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6449, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6785, PETRI_PLACES=337, PETRI_TRANSITIONS=423} [2024-05-12 10:39:16,667 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 287 predicate places. [2024-05-12 10:39:16,667 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 423 transitions, 6785 flow [2024-05-12 10:39:16,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:39:16,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:39:16,668 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:39:16,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-05-12 10:39:16,668 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:39:16,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:39:16,668 INFO L85 PathProgramCache]: Analyzing trace with hash 14852812, now seen corresponding path program 2 times [2024-05-12 10:39:16,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:39:16,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811692966] [2024-05-12 10:39:16,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:39:16,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:39:16,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:39:16,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:39:16,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:39:16,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811692966] [2024-05-12 10:39:16,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811692966] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:39:16,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:39:16,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:39:16,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266238068] [2024-05-12 10:39:16,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:39:16,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:39:16,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:39:16,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:39:16,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:39:17,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:39:17,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 423 transitions, 6785 flow. Second operand has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:39:17,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:39:17,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:39:17,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:39:18,541 INFO L124 PetriNetUnfolderBase]: 4996/8456 cut-off events. [2024-05-12 10:39:18,541 INFO L125 PetriNetUnfolderBase]: For 390515/391230 co-relation queries the response was YES. [2024-05-12 10:39:18,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56981 conditions, 8456 events. 4996/8456 cut-off events. For 390515/391230 co-relation queries the response was YES. Maximal size of possible extension queue 506. Compared 61582 event pairs, 1279 based on Foata normal form. 45/8105 useless extension candidates. Maximal degree in co-relation 56822. Up to 7155 conditions per place. [2024-05-12 10:39:18,629 INFO L140 encePairwiseOnDemand]: 38/46 looper letters, 413 selfloop transitions, 25 changer transitions 0/453 dead transitions. [2024-05-12 10:39:18,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 453 transitions, 7961 flow [2024-05-12 10:39:18,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:39:18,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:39:18,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-05-12 10:39:18,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5380434782608695 [2024-05-12 10:39:18,630 INFO L175 Difference]: Start difference. First operand has 337 places, 423 transitions, 6785 flow. Second operand 8 states and 198 transitions. [2024-05-12 10:39:18,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 453 transitions, 7961 flow [2024-05-12 10:39:20,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 453 transitions, 7779 flow, removed 65 selfloop flow, removed 3 redundant places. [2024-05-12 10:39:20,456 INFO L231 Difference]: Finished difference. Result has 343 places, 424 transitions, 6695 flow [2024-05-12 10:39:20,456 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6605, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=423, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6695, PETRI_PLACES=343, PETRI_TRANSITIONS=424} [2024-05-12 10:39:20,456 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 293 predicate places. [2024-05-12 10:39:20,456 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 424 transitions, 6695 flow [2024-05-12 10:39:20,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:39:20,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:39:20,457 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:39:20,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-05-12 10:39:20,457 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:39:20,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:39:20,457 INFO L85 PathProgramCache]: Analyzing trace with hash -901871062, now seen corresponding path program 3 times [2024-05-12 10:39:20,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:39:20,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998596816] [2024-05-12 10:39:20,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:39:20,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:39:20,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:39:20,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:39:20,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:39:20,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998596816] [2024-05-12 10:39:20,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998596816] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:39:20,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:39:20,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:39:20,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669380495] [2024-05-12 10:39:20,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:39:20,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:39:20,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:39:20,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:39:20,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:39:20,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:39:20,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 424 transitions, 6695 flow. Second operand has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:39:20,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:39:20,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:39:20,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:39:22,234 INFO L124 PetriNetUnfolderBase]: 5017/8390 cut-off events. [2024-05-12 10:39:22,234 INFO L125 PetriNetUnfolderBase]: For 389330/390045 co-relation queries the response was YES. [2024-05-12 10:39:22,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56884 conditions, 8390 events. 5017/8390 cut-off events. For 389330/390045 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 60500 event pairs, 1580 based on Foata normal form. 151/8142 useless extension candidates. Maximal degree in co-relation 56722. Up to 7213 conditions per place. [2024-05-12 10:39:22,342 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 381 selfloop transitions, 59 changer transitions 0/455 dead transitions. [2024-05-12 10:39:22,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 455 transitions, 7985 flow [2024-05-12 10:39:22,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:39:22,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:39:22,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-05-12 10:39:22,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5570652173913043 [2024-05-12 10:39:22,343 INFO L175 Difference]: Start difference. First operand has 343 places, 424 transitions, 6695 flow. Second operand 8 states and 205 transitions. [2024-05-12 10:39:22,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 455 transitions, 7985 flow [2024-05-12 10:39:24,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 455 transitions, 7831 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-05-12 10:39:24,825 INFO L231 Difference]: Finished difference. Result has 343 places, 428 transitions, 6820 flow [2024-05-12 10:39:24,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6541, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6820, PETRI_PLACES=343, PETRI_TRANSITIONS=428} [2024-05-12 10:39:24,826 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 293 predicate places. [2024-05-12 10:39:24,826 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 428 transitions, 6820 flow [2024-05-12 10:39:24,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:39:24,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:39:24,826 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] [2024-05-12 10:39:24,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-05-12 10:39:24,827 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:39:24,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:39:24,828 INFO L85 PathProgramCache]: Analyzing trace with hash -25835610, now seen corresponding path program 4 times [2024-05-12 10:39:24,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:39:24,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353831430] [2024-05-12 10:39:24,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:39:24,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:39:24,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:39:25,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:39:25,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:39:25,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353831430] [2024-05-12 10:39:25,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353831430] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:39:25,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:39:25,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:39:25,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335264269] [2024-05-12 10:39:25,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:39:25,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:39:25,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:39:25,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:39:25,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:39:25,174 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:39:25,175 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 428 transitions, 6820 flow. Second operand has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:39:25,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:39:25,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:39:25,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:39:26,564 INFO L124 PetriNetUnfolderBase]: 5012/8375 cut-off events. [2024-05-12 10:39:26,565 INFO L125 PetriNetUnfolderBase]: For 384565/385280 co-relation queries the response was YES. [2024-05-12 10:39:26,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55954 conditions, 8375 events. 5012/8375 cut-off events. For 384565/385280 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 60272 event pairs, 1588 based on Foata normal form. 172/8146 useless extension candidates. Maximal degree in co-relation 55792. Up to 7270 conditions per place. [2024-05-12 10:39:26,670 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 376 selfloop transitions, 57 changer transitions 0/448 dead transitions. [2024-05-12 10:39:26,670 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 448 transitions, 7746 flow [2024-05-12 10:39:26,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:39:26,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:39:26,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-05-12 10:39:26,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5434782608695652 [2024-05-12 10:39:26,671 INFO L175 Difference]: Start difference. First operand has 343 places, 428 transitions, 6820 flow. Second operand 8 states and 200 transitions. [2024-05-12 10:39:26,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 448 transitions, 7746 flow [2024-05-12 10:39:29,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 448 transitions, 7548 flow, removed 68 selfloop flow, removed 4 redundant places. [2024-05-12 10:39:29,063 INFO L231 Difference]: Finished difference. Result has 347 places, 428 transitions, 6741 flow [2024-05-12 10:39:29,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6622, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=428, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6741, PETRI_PLACES=347, PETRI_TRANSITIONS=428} [2024-05-12 10:39:29,064 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 297 predicate places. [2024-05-12 10:39:29,064 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 428 transitions, 6741 flow [2024-05-12 10:39:29,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:39:29,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:39:29,065 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] [2024-05-12 10:39:29,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-05-12 10:39:29,065 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:39:29,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:39:29,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1149385032, now seen corresponding path program 5 times [2024-05-12 10:39:29,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:39:29,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579471094] [2024-05-12 10:39:29,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:39:29,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:39:29,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:39:29,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:39:29,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:39:29,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579471094] [2024-05-12 10:39:29,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579471094] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:39:29,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:39:29,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:39:29,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537855391] [2024-05-12 10:39:29,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:39:29,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:39:29,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:39:29,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:39:29,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:39:29,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:39:29,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 428 transitions, 6741 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:39:29,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:39:29,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:39:29,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:39:30,949 INFO L124 PetriNetUnfolderBase]: 5033/8460 cut-off events. [2024-05-12 10:39:30,950 INFO L125 PetriNetUnfolderBase]: For 390106/390366 co-relation queries the response was YES. [2024-05-12 10:39:31,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56146 conditions, 8460 events. 5033/8460 cut-off events. For 390106/390366 co-relation queries the response was YES. Maximal size of possible extension queue 512. Compared 61420 event pairs, 1626 based on Foata normal form. 108/8203 useless extension candidates. Maximal degree in co-relation 55982. Up to 7109 conditions per place. [2024-05-12 10:39:31,040 INFO L140 encePairwiseOnDemand]: 37/46 looper letters, 346 selfloop transitions, 98 changer transitions 0/459 dead transitions. [2024-05-12 10:39:31,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 459 transitions, 8039 flow [2024-05-12 10:39:31,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-05-12 10:39:31,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-05-12 10:39:31,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 188 transitions. [2024-05-12 10:39:31,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5838509316770186 [2024-05-12 10:39:31,042 INFO L175 Difference]: Start difference. First operand has 347 places, 428 transitions, 6741 flow. Second operand 7 states and 188 transitions. [2024-05-12 10:39:31,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 459 transitions, 8039 flow [2024-05-12 10:39:33,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 459 transitions, 7917 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-05-12 10:39:33,520 INFO L231 Difference]: Finished difference. Result has 347 places, 432 transitions, 6972 flow [2024-05-12 10:39:33,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6619, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=428, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6972, PETRI_PLACES=347, PETRI_TRANSITIONS=432} [2024-05-12 10:39:33,521 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 297 predicate places. [2024-05-12 10:39:33,521 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 432 transitions, 6972 flow [2024-05-12 10:39:33,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:39:33,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:39:33,521 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, 1] [2024-05-12 10:39:33,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-05-12 10:39:33,522 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:39:33,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:39:33,522 INFO L85 PathProgramCache]: Analyzing trace with hash 386412580, now seen corresponding path program 6 times [2024-05-12 10:39:33,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:39:33,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353065544] [2024-05-12 10:39:33,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:39:33,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:39:33,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:39:33,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:39:33,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:39:33,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353065544] [2024-05-12 10:39:33,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353065544] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:39:33,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:39:33,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 10:39:33,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751793885] [2024-05-12 10:39:33,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:39:33,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 10:39:33,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:39:33,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 10:39:33,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-05-12 10:39:33,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:39:33,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 432 transitions, 6972 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:39:33,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:39:33,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:39:33,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:39:35,314 INFO L124 PetriNetUnfolderBase]: 5054/8447 cut-off events. [2024-05-12 10:39:35,315 INFO L125 PetriNetUnfolderBase]: For 401328/402085 co-relation queries the response was YES. [2024-05-12 10:39:35,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56885 conditions, 8447 events. 5054/8447 cut-off events. For 401328/402085 co-relation queries the response was YES. Maximal size of possible extension queue 515. Compared 60974 event pairs, 1592 based on Foata normal form. 174/8216 useless extension candidates. Maximal degree in co-relation 56721. Up to 7216 conditions per place. [2024-05-12 10:39:35,424 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 347 selfloop transitions, 96 changer transitions 0/458 dead transitions. [2024-05-12 10:39:35,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 458 transitions, 8008 flow [2024-05-12 10:39:35,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 10:39:35,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 10:39:35,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 222 transitions. [2024-05-12 10:39:35,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5362318840579711 [2024-05-12 10:39:35,426 INFO L175 Difference]: Start difference. First operand has 347 places, 432 transitions, 6972 flow. Second operand 9 states and 222 transitions. [2024-05-12 10:39:35,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 458 transitions, 8008 flow [2024-05-12 10:39:37,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 458 transitions, 7775 flow, removed 63 selfloop flow, removed 3 redundant places. [2024-05-12 10:39:37,745 INFO L231 Difference]: Finished difference. Result has 353 places, 434 transitions, 7018 flow [2024-05-12 10:39:37,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6767, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7018, PETRI_PLACES=353, PETRI_TRANSITIONS=434} [2024-05-12 10:39:37,746 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 303 predicate places. [2024-05-12 10:39:37,746 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 434 transitions, 7018 flow [2024-05-12 10:39:37,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:39:37,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:39:37,746 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] [2024-05-12 10:39:37,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-05-12 10:39:37,747 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:39:37,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:39:37,747 INFO L85 PathProgramCache]: Analyzing trace with hash 673299910, now seen corresponding path program 7 times [2024-05-12 10:39:37,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:39:37,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207455654] [2024-05-12 10:39:37,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:39:37,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:39:37,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:39:38,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:39:38,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:39:38,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207455654] [2024-05-12 10:39:38,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207455654] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:39:38,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:39:38,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 10:39:38,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444057039] [2024-05-12 10:39:38,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:39:38,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 10:39:38,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:39:38,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 10:39:38,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-05-12 10:39:38,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:39:38,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 434 transitions, 7018 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:39:38,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:39:38,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:39:38,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:39:39,529 INFO L124 PetriNetUnfolderBase]: 5049/8440 cut-off events. [2024-05-12 10:39:39,529 INFO L125 PetriNetUnfolderBase]: For 392462/393189 co-relation queries the response was YES. [2024-05-12 10:39:39,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56471 conditions, 8440 events. 5049/8440 cut-off events. For 392462/393189 co-relation queries the response was YES. Maximal size of possible extension queue 515. Compared 60883 event pairs, 1591 based on Foata normal form. 157/8192 useless extension candidates. Maximal degree in co-relation 56304. Up to 7209 conditions per place. [2024-05-12 10:39:39,640 INFO L140 encePairwiseOnDemand]: 36/46 looper letters, 343 selfloop transitions, 97 changer transitions 0/455 dead transitions. [2024-05-12 10:39:39,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 455 transitions, 7960 flow [2024-05-12 10:39:39,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 10:39:39,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 10:39:39,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 220 transitions. [2024-05-12 10:39:39,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5314009661835749 [2024-05-12 10:39:39,641 INFO L175 Difference]: Start difference. First operand has 353 places, 434 transitions, 7018 flow. Second operand 9 states and 220 transitions. [2024-05-12 10:39:39,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 455 transitions, 7960 flow [2024-05-12 10:39:41,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 455 transitions, 7691 flow, removed 40 selfloop flow, removed 7 redundant places. [2024-05-12 10:39:41,750 INFO L231 Difference]: Finished difference. Result has 355 places, 434 transitions, 6948 flow [2024-05-12 10:39:41,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6749, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=434, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6948, PETRI_PLACES=355, PETRI_TRANSITIONS=434} [2024-05-12 10:39:41,750 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 305 predicate places. [2024-05-12 10:39:41,750 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 434 transitions, 6948 flow [2024-05-12 10:39:41,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:39:41,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:39:41,751 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] [2024-05-12 10:39:41,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-05-12 10:39:41,751 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:39:41,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:39:41,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1129349331, now seen corresponding path program 1 times [2024-05-12 10:39:41,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:39:41,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619042957] [2024-05-12 10:39:41,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:39:41,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:39:41,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:39:42,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:39:42,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:39:42,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619042957] [2024-05-12 10:39:42,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619042957] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:39:42,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:39:42,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:39:42,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057826193] [2024-05-12 10:39:42,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:39:42,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:39:42,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:39:42,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:39:42,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:39:42,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:39:42,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 434 transitions, 6948 flow. Second operand has 9 states, 9 states have (on average 18.0) internal successors, (162), 9 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:39:42,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:39:42,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:39:42,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:39:43,722 INFO L124 PetriNetUnfolderBase]: 5068/8468 cut-off events. [2024-05-12 10:39:43,722 INFO L125 PetriNetUnfolderBase]: For 397324/398073 co-relation queries the response was YES. [2024-05-12 10:39:43,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56569 conditions, 8468 events. 5068/8468 cut-off events. For 397324/398073 co-relation queries the response was YES. Maximal size of possible extension queue 515. Compared 61079 event pairs, 1591 based on Foata normal form. 168/8225 useless extension candidates. Maximal degree in co-relation 56401. Up to 7281 conditions per place. [2024-05-12 10:39:43,821 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 341 selfloop transitions, 107 changer transitions 0/463 dead transitions. [2024-05-12 10:39:43,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 463 transitions, 8452 flow [2024-05-12 10:39:43,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 10:39:43,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 10:39:43,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 227 transitions. [2024-05-12 10:39:43,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5483091787439613 [2024-05-12 10:39:43,822 INFO L175 Difference]: Start difference. First operand has 355 places, 434 transitions, 6948 flow. Second operand 9 states and 227 transitions. [2024-05-12 10:39:43,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 463 transitions, 8452 flow [2024-05-12 10:39:45,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 463 transitions, 8242 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-05-12 10:39:45,915 INFO L231 Difference]: Finished difference. Result has 356 places, 440 transitions, 7128 flow [2024-05-12 10:39:45,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6738, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=434, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7128, PETRI_PLACES=356, PETRI_TRANSITIONS=440} [2024-05-12 10:39:45,915 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 306 predicate places. [2024-05-12 10:39:45,916 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 440 transitions, 7128 flow [2024-05-12 10:39:45,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.0) internal successors, (162), 9 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:39:45,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:39:45,916 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] [2024-05-12 10:39:45,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-05-12 10:39:45,916 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:39:45,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:39:45,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1900719683, now seen corresponding path program 2 times [2024-05-12 10:39:45,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:39:45,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772207075] [2024-05-12 10:39:45,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:39:45,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:39:45,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:39:46,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:39:46,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:39:46,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772207075] [2024-05-12 10:39:46,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772207075] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:39:46,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:39:46,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 10:39:46,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353383166] [2024-05-12 10:39:46,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:39:46,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 10:39:46,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:39:46,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 10:39:46,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-05-12 10:39:46,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:39:46,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 440 transitions, 7128 flow. Second operand has 10 states, 10 states have (on average 17.8) internal successors, (178), 10 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:39:46,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:39:46,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:39:46,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:39:47,860 INFO L124 PetriNetUnfolderBase]: 5076/8480 cut-off events. [2024-05-12 10:39:47,861 INFO L125 PetriNetUnfolderBase]: For 404530/405325 co-relation queries the response was YES. [2024-05-12 10:39:47,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56742 conditions, 8480 events. 5076/8480 cut-off events. For 404530/405325 co-relation queries the response was YES. Maximal size of possible extension queue 515. Compared 61189 event pairs, 1591 based on Foata normal form. 220/8286 useless extension candidates. Maximal degree in co-relation 56573. Up to 7290 conditions per place. [2024-05-12 10:39:47,978 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 345 selfloop transitions, 110 changer transitions 0/470 dead transitions. [2024-05-12 10:39:47,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 470 transitions, 8583 flow [2024-05-12 10:39:47,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 10:39:47,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 10:39:47,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 252 transitions. [2024-05-12 10:39:47,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5478260869565217 [2024-05-12 10:39:47,979 INFO L175 Difference]: Start difference. First operand has 356 places, 440 transitions, 7128 flow. Second operand 10 states and 252 transitions. [2024-05-12 10:39:47,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 470 transitions, 8583 flow [2024-05-12 10:39:50,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 470 transitions, 8323 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-05-12 10:39:50,531 INFO L231 Difference]: Finished difference. Result has 360 places, 443 transitions, 7185 flow [2024-05-12 10:39:50,531 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6874, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=440, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7185, PETRI_PLACES=360, PETRI_TRANSITIONS=443} [2024-05-12 10:39:50,531 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 310 predicate places. [2024-05-12 10:39:50,531 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 443 transitions, 7185 flow [2024-05-12 10:39:50,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.8) internal successors, (178), 10 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:39:50,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:39:50,532 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] [2024-05-12 10:39:50,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-05-12 10:39:50,532 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:39:50,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:39:50,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1129360491, now seen corresponding path program 3 times [2024-05-12 10:39:50,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:39:50,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697550073] [2024-05-12 10:39:50,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:39:50,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:39:50,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:39:50,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:39:50,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:39:50,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697550073] [2024-05-12 10:39:50,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697550073] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:39:50,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:39:50,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:39:50,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110320905] [2024-05-12 10:39:50,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:39:50,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:39:50,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:39:50,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:39:50,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:39:50,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:39:50,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 443 transitions, 7185 flow. Second operand has 8 states, 8 states have (on average 18.25) internal successors, (146), 8 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:39:50,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:39:50,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:39:50,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:39:52,329 INFO L124 PetriNetUnfolderBase]: 5084/8492 cut-off events. [2024-05-12 10:39:52,329 INFO L125 PetriNetUnfolderBase]: For 410999/411761 co-relation queries the response was YES. [2024-05-12 10:39:52,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56868 conditions, 8492 events. 5084/8492 cut-off events. For 410999/411761 co-relation queries the response was YES. Maximal size of possible extension queue 515. Compared 61325 event pairs, 1591 based on Foata normal form. 166/8241 useless extension candidates. Maximal degree in co-relation 56698. Up to 7299 conditions per place. [2024-05-12 10:39:52,448 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 337 selfloop transitions, 113 changer transitions 0/465 dead transitions. [2024-05-12 10:39:52,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 465 transitions, 8400 flow [2024-05-12 10:39:52,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:39:52,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:39:52,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-05-12 10:39:52,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-05-12 10:39:52,450 INFO L175 Difference]: Start difference. First operand has 360 places, 443 transitions, 7185 flow. Second operand 8 states and 207 transitions. [2024-05-12 10:39:52,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 465 transitions, 8400 flow [2024-05-12 10:39:55,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 465 transitions, 8097 flow, removed 24 selfloop flow, removed 8 redundant places. [2024-05-12 10:39:55,052 INFO L231 Difference]: Finished difference. Result has 360 places, 446 transitions, 7185 flow [2024-05-12 10:39:55,052 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6888, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7185, PETRI_PLACES=360, PETRI_TRANSITIONS=446} [2024-05-12 10:39:55,053 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 310 predicate places. [2024-05-12 10:39:55,053 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 446 transitions, 7185 flow [2024-05-12 10:39:55,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.25) internal successors, (146), 8 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:39:55,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:39:55,053 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] [2024-05-12 10:39:55,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-05-12 10:39:55,053 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:39:55,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:39:55,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1129181931, now seen corresponding path program 4 times [2024-05-12 10:39:55,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:39:55,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160208212] [2024-05-12 10:39:55,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:39:55,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:39:55,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:39:55,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:39:55,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:39:55,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160208212] [2024-05-12 10:39:55,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160208212] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:39:55,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:39:55,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:39:55,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737762422] [2024-05-12 10:39:55,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:39:55,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:39:55,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:39:55,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:39:55,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:39:55,396 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:39:55,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 446 transitions, 7185 flow. Second operand has 9 states, 9 states have (on average 18.0) internal successors, (162), 9 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:39:55,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:39:55,397 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:39:55,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:39:57,018 INFO L124 PetriNetUnfolderBase]: 5092/8504 cut-off events. [2024-05-12 10:39:57,018 INFO L125 PetriNetUnfolderBase]: For 416417/417215 co-relation queries the response was YES. [2024-05-12 10:39:57,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56946 conditions, 8504 events. 5092/8504 cut-off events. For 416417/417215 co-relation queries the response was YES. Maximal size of possible extension queue 515. Compared 61346 event pairs, 1591 based on Foata normal form. 241/8325 useless extension candidates. Maximal degree in co-relation 56776. Up to 7308 conditions per place. [2024-05-12 10:39:57,119 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 347 selfloop transitions, 116 changer transitions 0/478 dead transitions. [2024-05-12 10:39:57,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 478 transitions, 8648 flow [2024-05-12 10:39:57,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 10:39:57,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 10:39:57,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 276 transitions. [2024-05-12 10:39:57,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5454545454545454 [2024-05-12 10:39:57,120 INFO L175 Difference]: Start difference. First operand has 360 places, 446 transitions, 7185 flow. Second operand 11 states and 276 transitions. [2024-05-12 10:39:57,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 478 transitions, 8648 flow [2024-05-12 10:39:59,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 478 transitions, 8457 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-05-12 10:39:59,383 INFO L231 Difference]: Finished difference. Result has 366 places, 449 transitions, 7303 flow [2024-05-12 10:39:59,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6997, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=446, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7303, PETRI_PLACES=366, PETRI_TRANSITIONS=449} [2024-05-12 10:39:59,384 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 316 predicate places. [2024-05-12 10:39:59,384 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 449 transitions, 7303 flow [2024-05-12 10:39:59,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.0) internal successors, (162), 9 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:39:59,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:39:59,385 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] [2024-05-12 10:39:59,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-05-12 10:39:59,385 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:39:59,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:39:59,385 INFO L85 PathProgramCache]: Analyzing trace with hash 382698625, now seen corresponding path program 5 times [2024-05-12 10:39:59,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:39:59,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116251319] [2024-05-12 10:39:59,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:39:59,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:39:59,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:39:59,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:39:59,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:39:59,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116251319] [2024-05-12 10:39:59,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116251319] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:39:59,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:39:59,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 10:39:59,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692392790] [2024-05-12 10:39:59,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:39:59,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 10:39:59,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:39:59,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 10:39:59,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-05-12 10:39:59,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:39:59,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 449 transitions, 7303 flow. Second operand has 11 states, 11 states have (on average 17.636363636363637) internal successors, (194), 11 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:39:59,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:39:59,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:39:59,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:40:01,278 INFO L124 PetriNetUnfolderBase]: 5122/8548 cut-off events. [2024-05-12 10:40:01,278 INFO L125 PetriNetUnfolderBase]: For 435256/436056 co-relation queries the response was YES. [2024-05-12 10:40:01,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57700 conditions, 8548 events. 5122/8548 cut-off events. For 435256/436056 co-relation queries the response was YES. Maximal size of possible extension queue 515. Compared 61529 event pairs, 1591 based on Foata normal form. 292/8411 useless extension candidates. Maximal degree in co-relation 57529. Up to 7079 conditions per place. [2024-05-12 10:40:01,387 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 236 selfloop transitions, 238 changer transitions 0/489 dead transitions. [2024-05-12 10:40:01,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 489 transitions, 8940 flow [2024-05-12 10:40:01,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-05-12 10:40:01,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-05-12 10:40:01,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 331 transitions. [2024-05-12 10:40:01,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5139751552795031 [2024-05-12 10:40:01,389 INFO L175 Difference]: Start difference. First operand has 366 places, 449 transitions, 7303 flow. Second operand 14 states and 331 transitions. [2024-05-12 10:40:01,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 489 transitions, 8940 flow [2024-05-12 10:40:04,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 489 transitions, 8700 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-05-12 10:40:04,014 INFO L231 Difference]: Finished difference. Result has 371 places, 458 transitions, 7760 flow [2024-05-12 10:40:04,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7063, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=449, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=229, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=7760, PETRI_PLACES=371, PETRI_TRANSITIONS=458} [2024-05-12 10:40:04,015 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 321 predicate places. [2024-05-12 10:40:04,015 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 458 transitions, 7760 flow [2024-05-12 10:40:04,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 17.636363636363637) internal successors, (194), 11 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:04,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:40:04,016 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] [2024-05-12 10:40:04,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-05-12 10:40:04,016 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:40:04,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:40:04,016 INFO L85 PathProgramCache]: Analyzing trace with hash 525048775, now seen corresponding path program 6 times [2024-05-12 10:40:04,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:40:04,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568335932] [2024-05-12 10:40:04,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:40:04,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:40:04,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:40:04,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:40:04,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:40:04,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568335932] [2024-05-12 10:40:04,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568335932] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:40:04,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:40:04,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 10:40:04,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500984749] [2024-05-12 10:40:04,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:40:04,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 10:40:04,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:40:04,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 10:40:04,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-05-12 10:40:04,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:40:04,418 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 458 transitions, 7760 flow. Second operand has 10 states, 10 states have (on average 17.8) internal successors, (178), 10 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:04,418 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:40:04,418 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:40:04,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:40:06,004 INFO L124 PetriNetUnfolderBase]: 5130/8560 cut-off events. [2024-05-12 10:40:06,004 INFO L125 PetriNetUnfolderBase]: For 444289/445035 co-relation queries the response was YES. [2024-05-12 10:40:06,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58325 conditions, 8560 events. 5130/8560 cut-off events. For 444289/445035 co-relation queries the response was YES. Maximal size of possible extension queue 515. Compared 61622 event pairs, 1591 based on Foata normal form. 211/8339 useless extension candidates. Maximal degree in co-relation 58152. Up to 7088 conditions per place. [2024-05-12 10:40:06,116 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 231 selfloop transitions, 241 changer transitions 0/487 dead transitions. [2024-05-12 10:40:06,116 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 487 transitions, 9242 flow [2024-05-12 10:40:06,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-05-12 10:40:06,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-05-12 10:40:06,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 287 transitions. [2024-05-12 10:40:06,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.519927536231884 [2024-05-12 10:40:06,117 INFO L175 Difference]: Start difference. First operand has 371 places, 458 transitions, 7760 flow. Second operand 12 states and 287 transitions. [2024-05-12 10:40:06,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 487 transitions, 9242 flow [2024-05-12 10:40:09,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 487 transitions, 8547 flow, removed 39 selfloop flow, removed 12 redundant places. [2024-05-12 10:40:09,057 INFO L231 Difference]: Finished difference. Result has 371 places, 461 transitions, 7627 flow [2024-05-12 10:40:09,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7074, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=458, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=238, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7627, PETRI_PLACES=371, PETRI_TRANSITIONS=461} [2024-05-12 10:40:09,058 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 321 predicate places. [2024-05-12 10:40:09,058 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 461 transitions, 7627 flow [2024-05-12 10:40:09,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.8) internal successors, (178), 10 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:09,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:40:09,058 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] [2024-05-12 10:40:09,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-05-12 10:40:09,059 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:40:09,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:40:09,059 INFO L85 PathProgramCache]: Analyzing trace with hash 353602345, now seen corresponding path program 7 times [2024-05-12 10:40:09,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:40:09,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986288043] [2024-05-12 10:40:09,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:40:09,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:40:09,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:40:09,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:40:09,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:40:09,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986288043] [2024-05-12 10:40:09,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986288043] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:40:09,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:40:09,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 10:40:09,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843046054] [2024-05-12 10:40:09,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:40:09,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 10:40:09,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:40:09,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 10:40:09,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-05-12 10:40:09,382 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:40:09,382 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 461 transitions, 7627 flow. Second operand has 11 states, 11 states have (on average 17.636363636363637) internal successors, (194), 11 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:09,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:40:09,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:40:09,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:40:11,003 INFO L124 PetriNetUnfolderBase]: 5149/8588 cut-off events. [2024-05-12 10:40:11,004 INFO L125 PetriNetUnfolderBase]: For 453630/454294 co-relation queries the response was YES. [2024-05-12 10:40:11,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58487 conditions, 8588 events. 5149/8588 cut-off events. For 453630/454294 co-relation queries the response was YES. Maximal size of possible extension queue 515. Compared 61836 event pairs, 1591 based on Foata normal form. 204/8354 useless extension candidates. Maximal degree in co-relation 58313. Up to 7109 conditions per place. [2024-05-12 10:40:11,123 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 234 selfloop transitions, 247 changer transitions 0/496 dead transitions. [2024-05-12 10:40:11,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 496 transitions, 9165 flow [2024-05-12 10:40:11,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-05-12 10:40:11,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-05-12 10:40:11,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 347 transitions. [2024-05-12 10:40:11,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5028985507246376 [2024-05-12 10:40:11,124 INFO L175 Difference]: Start difference. First operand has 371 places, 461 transitions, 7627 flow. Second operand 15 states and 347 transitions. [2024-05-12 10:40:11,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 496 transitions, 9165 flow [2024-05-12 10:40:13,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 496 transitions, 8521 flow, removed 39 selfloop flow, removed 10 redundant places. [2024-05-12 10:40:13,846 INFO L231 Difference]: Finished difference. Result has 376 places, 467 transitions, 7585 flow [2024-05-12 10:40:13,846 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=6995, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=241, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=7585, PETRI_PLACES=376, PETRI_TRANSITIONS=467} [2024-05-12 10:40:13,846 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 326 predicate places. [2024-05-12 10:40:13,846 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 467 transitions, 7585 flow [2024-05-12 10:40:13,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 17.636363636363637) internal successors, (194), 11 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:13,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:40:13,847 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] [2024-05-12 10:40:13,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-05-12 10:40:13,847 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:40:13,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:40:13,847 INFO L85 PathProgramCache]: Analyzing trace with hash -1120668379, now seen corresponding path program 8 times [2024-05-12 10:40:13,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:40:13,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210634871] [2024-05-12 10:40:13,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:40:13,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:40:13,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:40:14,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:40:14,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:40:14,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210634871] [2024-05-12 10:40:14,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210634871] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:40:14,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:40:14,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 10:40:14,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009353901] [2024-05-12 10:40:14,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:40:14,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 10:40:14,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:40:14,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 10:40:14,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-05-12 10:40:14,184 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:40:14,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 467 transitions, 7585 flow. Second operand has 11 states, 11 states have (on average 17.636363636363637) internal successors, (194), 11 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:14,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:40:14,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:40:14,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:40:15,903 INFO L124 PetriNetUnfolderBase]: 5146/8584 cut-off events. [2024-05-12 10:40:15,903 INFO L125 PetriNetUnfolderBase]: For 454066/454792 co-relation queries the response was YES. [2024-05-12 10:40:15,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58261 conditions, 8584 events. 5146/8584 cut-off events. For 454066/454792 co-relation queries the response was YES. Maximal size of possible extension queue 515. Compared 61879 event pairs, 1591 based on Foata normal form. 204/8350 useless extension candidates. Maximal degree in co-relation 58086. Up to 7106 conditions per place. [2024-05-12 10:40:15,996 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 233 selfloop transitions, 247 changer transitions 0/495 dead transitions. [2024-05-12 10:40:15,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 495 transitions, 8821 flow [2024-05-12 10:40:15,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-05-12 10:40:15,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-05-12 10:40:15,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 346 transitions. [2024-05-12 10:40:15,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5014492753623189 [2024-05-12 10:40:15,998 INFO L175 Difference]: Start difference. First operand has 376 places, 467 transitions, 7585 flow. Second operand 15 states and 346 transitions. [2024-05-12 10:40:15,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 495 transitions, 8821 flow [2024-05-12 10:40:18,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 495 transitions, 8432 flow, removed 18 selfloop flow, removed 11 redundant places. [2024-05-12 10:40:18,836 INFO L231 Difference]: Finished difference. Result has 380 places, 467 transitions, 7696 flow [2024-05-12 10:40:18,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7196, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=247, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=7696, PETRI_PLACES=380, PETRI_TRANSITIONS=467} [2024-05-12 10:40:18,836 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 330 predicate places. [2024-05-12 10:40:18,837 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 467 transitions, 7696 flow [2024-05-12 10:40:18,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 17.636363636363637) internal successors, (194), 11 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:18,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:40:18,837 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] [2024-05-12 10:40:18,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-05-12 10:40:18,837 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:40:18,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:40:18,838 INFO L85 PathProgramCache]: Analyzing trace with hash 558186835, now seen corresponding path program 9 times [2024-05-12 10:40:18,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:40:18,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619523628] [2024-05-12 10:40:18,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:40:18,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:40:18,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:40:19,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:40:19,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:40:19,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619523628] [2024-05-12 10:40:19,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619523628] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:40:19,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:40:19,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 10:40:19,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293027405] [2024-05-12 10:40:19,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:40:19,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 10:40:19,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:40:19,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 10:40:19,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-05-12 10:40:19,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:40:19,190 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 467 transitions, 7696 flow. Second operand has 10 states, 10 states have (on average 17.8) internal successors, (178), 10 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:19,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:40:19,190 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:40:19,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:40:20,760 INFO L124 PetriNetUnfolderBase]: 5165/8612 cut-off events. [2024-05-12 10:40:20,760 INFO L125 PetriNetUnfolderBase]: For 468327/468990 co-relation queries the response was YES. [2024-05-12 10:40:20,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58708 conditions, 8612 events. 5165/8612 cut-off events. For 468327/468990 co-relation queries the response was YES. Maximal size of possible extension queue 515. Compared 62084 event pairs, 1591 based on Foata normal form. 145/8313 useless extension candidates. Maximal degree in co-relation 58532. Up to 7127 conditions per place. [2024-05-12 10:40:20,875 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 234 selfloop transitions, 248 changer transitions 0/497 dead transitions. [2024-05-12 10:40:20,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 497 transitions, 9236 flow [2024-05-12 10:40:20,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-05-12 10:40:20,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-05-12 10:40:20,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 307 transitions. [2024-05-12 10:40:20,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5133779264214047 [2024-05-12 10:40:20,876 INFO L175 Difference]: Start difference. First operand has 380 places, 467 transitions, 7696 flow. Second operand 13 states and 307 transitions. [2024-05-12 10:40:20,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 497 transitions, 9236 flow [2024-05-12 10:40:23,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 497 transitions, 8730 flow, removed 0 selfloop flow, removed 14 redundant places. [2024-05-12 10:40:23,517 INFO L231 Difference]: Finished difference. Result has 379 places, 473 transitions, 7800 flow [2024-05-12 10:40:23,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7202, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=242, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=7800, PETRI_PLACES=379, PETRI_TRANSITIONS=473} [2024-05-12 10:40:23,517 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 329 predicate places. [2024-05-12 10:40:23,517 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 473 transitions, 7800 flow [2024-05-12 10:40:23,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.8) internal successors, (178), 10 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:23,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:40:23,518 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] [2024-05-12 10:40:23,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-05-12 10:40:23,518 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:40:23,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:40:23,518 INFO L85 PathProgramCache]: Analyzing trace with hash 525377065, now seen corresponding path program 10 times [2024-05-12 10:40:23,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:40:23,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68271762] [2024-05-12 10:40:23,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:40:23,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:40:23,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:40:23,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:40:23,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:40:23,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68271762] [2024-05-12 10:40:23,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68271762] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:40:23,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:40:23,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 10:40:23,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770008751] [2024-05-12 10:40:23,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:40:23,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 10:40:23,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:40:23,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 10:40:23,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-05-12 10:40:23,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:40:23,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 473 transitions, 7800 flow. Second operand has 10 states, 10 states have (on average 17.8) internal successors, (178), 10 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:23,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:40:23,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:40:23,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:40:25,415 INFO L124 PetriNetUnfolderBase]: 5162/8608 cut-off events. [2024-05-12 10:40:25,416 INFO L125 PetriNetUnfolderBase]: For 470718/471389 co-relation queries the response was YES. [2024-05-12 10:40:25,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58630 conditions, 8608 events. 5162/8608 cut-off events. For 470718/471389 co-relation queries the response was YES. Maximal size of possible extension queue 515. Compared 62042 event pairs, 1591 based on Foata normal form. 145/8309 useless extension candidates. Maximal degree in co-relation 58453. Up to 7124 conditions per place. [2024-05-12 10:40:25,534 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 233 selfloop transitions, 246 changer transitions 0/494 dead transitions. [2024-05-12 10:40:25,534 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 494 transitions, 9020 flow [2024-05-12 10:40:25,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 10:40:25,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 10:40:25,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 250 transitions. [2024-05-12 10:40:25,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5434782608695652 [2024-05-12 10:40:25,535 INFO L175 Difference]: Start difference. First operand has 379 places, 473 transitions, 7800 flow. Second operand 10 states and 250 transitions. [2024-05-12 10:40:25,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 494 transitions, 9020 flow [2024-05-12 10:40:28,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 494 transitions, 8595 flow, removed 18 selfloop flow, removed 9 redundant places. [2024-05-12 10:40:28,921 INFO L231 Difference]: Finished difference. Result has 380 places, 473 transitions, 7873 flow [2024-05-12 10:40:28,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7375, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=246, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7873, PETRI_PLACES=380, PETRI_TRANSITIONS=473} [2024-05-12 10:40:28,922 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 330 predicate places. [2024-05-12 10:40:28,922 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 473 transitions, 7873 flow [2024-05-12 10:40:28,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.8) internal successors, (178), 10 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:28,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:40:28,922 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] [2024-05-12 10:40:28,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-05-12 10:40:28,922 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:40:28,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:40:28,923 INFO L85 PathProgramCache]: Analyzing trace with hash 1125378110, now seen corresponding path program 1 times [2024-05-12 10:40:28,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:40:28,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398541603] [2024-05-12 10:40:28,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:40:28,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:40:28,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:40:29,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:40:29,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:40:29,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398541603] [2024-05-12 10:40:29,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398541603] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:40:29,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:40:29,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:40:29,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085929345] [2024-05-12 10:40:29,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:40:29,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:40:29,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:40:29,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:40:29,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:40:29,302 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:40:29,302 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 473 transitions, 7873 flow. Second operand has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:29,302 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:40:29,302 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:40:29,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:40:30,959 INFO L124 PetriNetUnfolderBase]: 5257/8785 cut-off events. [2024-05-12 10:40:30,960 INFO L125 PetriNetUnfolderBase]: For 541074/541765 co-relation queries the response was YES. [2024-05-12 10:40:31,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60514 conditions, 8785 events. 5257/8785 cut-off events. For 541074/541765 co-relation queries the response was YES. Maximal size of possible extension queue 529. Compared 63603 event pairs, 1608 based on Foata normal form. 172/8509 useless extension candidates. Maximal degree in co-relation 60337. Up to 7500 conditions per place. [2024-05-12 10:40:31,078 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 396 selfloop transitions, 88 changer transitions 0/499 dead transitions. [2024-05-12 10:40:31,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 499 transitions, 9017 flow [2024-05-12 10:40:31,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 10:40:31,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 10:40:31,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 228 transitions. [2024-05-12 10:40:31,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5507246376811594 [2024-05-12 10:40:31,079 INFO L175 Difference]: Start difference. First operand has 380 places, 473 transitions, 7873 flow. Second operand 9 states and 228 transitions. [2024-05-12 10:40:31,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 499 transitions, 9017 flow [2024-05-12 10:40:34,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 499 transitions, 8525 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-05-12 10:40:34,114 INFO L231 Difference]: Finished difference. Result has 380 places, 475 transitions, 7642 flow [2024-05-12 10:40:34,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7381, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=385, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7642, PETRI_PLACES=380, PETRI_TRANSITIONS=475} [2024-05-12 10:40:34,114 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 330 predicate places. [2024-05-12 10:40:34,114 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 475 transitions, 7642 flow [2024-05-12 10:40:34,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:34,115 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:40:34,115 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] [2024-05-12 10:40:34,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-05-12 10:40:34,115 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:40:34,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:40:34,115 INFO L85 PathProgramCache]: Analyzing trace with hash 1129527891, now seen corresponding path program 11 times [2024-05-12 10:40:34,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:40:34,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809183093] [2024-05-12 10:40:34,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:40:34,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:40:34,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:40:34,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:40:34,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:40:34,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809183093] [2024-05-12 10:40:34,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809183093] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:40:34,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:40:34,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:40:34,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319230997] [2024-05-12 10:40:34,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:40:34,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:40:34,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:40:34,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:40:34,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:40:34,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:40:34,455 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 475 transitions, 7642 flow. Second operand has 9 states, 9 states have (on average 18.0) internal successors, (162), 9 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:34,455 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:40:34,456 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:40:34,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:40:36,289 INFO L124 PetriNetUnfolderBase]: 5265/8780 cut-off events. [2024-05-12 10:40:36,290 INFO L125 PetriNetUnfolderBase]: For 501625/502266 co-relation queries the response was YES. [2024-05-12 10:40:36,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60442 conditions, 8780 events. 5265/8780 cut-off events. For 501625/502266 co-relation queries the response was YES. Maximal size of possible extension queue 529. Compared 63528 event pairs, 1615 based on Foata normal form. 138/8463 useless extension candidates. Maximal degree in co-relation 60263. Up to 7550 conditions per place. [2024-05-12 10:40:36,392 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 365 selfloop transitions, 118 changer transitions 0/498 dead transitions. [2024-05-12 10:40:36,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 498 transitions, 8943 flow [2024-05-12 10:40:36,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 10:40:36,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 10:40:36,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 227 transitions. [2024-05-12 10:40:36,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5483091787439613 [2024-05-12 10:40:36,393 INFO L175 Difference]: Start difference. First operand has 380 places, 475 transitions, 7642 flow. Second operand 9 states and 227 transitions. [2024-05-12 10:40:36,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 498 transitions, 8943 flow [2024-05-12 10:40:39,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 498 transitions, 8718 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-05-12 10:40:39,483 INFO L231 Difference]: Finished difference. Result has 382 places, 478 transitions, 7732 flow [2024-05-12 10:40:39,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7419, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=475, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7732, PETRI_PLACES=382, PETRI_TRANSITIONS=478} [2024-05-12 10:40:39,483 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 332 predicate places. [2024-05-12 10:40:39,484 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 478 transitions, 7732 flow [2024-05-12 10:40:39,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.0) internal successors, (162), 9 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:39,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:40:39,484 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] [2024-05-12 10:40:39,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-05-12 10:40:39,484 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:40:39,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:40:39,485 INFO L85 PathProgramCache]: Analyzing trace with hash 1896914281, now seen corresponding path program 12 times [2024-05-12 10:40:39,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:40:39,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481609660] [2024-05-12 10:40:39,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:40:39,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:40:39,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:40:39,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:40:39,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:40:39,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481609660] [2024-05-12 10:40:39,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481609660] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:40:39,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:40:39,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:40:39,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372004958] [2024-05-12 10:40:39,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:40:39,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:40:39,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:40:39,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:40:39,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:40:39,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:40:39,801 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 478 transitions, 7732 flow. Second operand has 9 states, 9 states have (on average 18.0) internal successors, (162), 9 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:39,801 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:40:39,801 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:40:39,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:40:41,456 INFO L124 PetriNetUnfolderBase]: 5262/8776 cut-off events. [2024-05-12 10:40:41,456 INFO L125 PetriNetUnfolderBase]: For 482846/483509 co-relation queries the response was YES. [2024-05-12 10:40:41,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59373 conditions, 8776 events. 5262/8776 cut-off events. For 482846/483509 co-relation queries the response was YES. Maximal size of possible extension queue 529. Compared 63550 event pairs, 1615 based on Foata normal form. 89/8410 useless extension candidates. Maximal degree in co-relation 59194. Up to 7547 conditions per place. [2024-05-12 10:40:41,583 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 359 selfloop transitions, 120 changer transitions 0/494 dead transitions. [2024-05-12 10:40:41,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 494 transitions, 8942 flow [2024-05-12 10:40:41,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 10:40:41,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 10:40:41,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 219 transitions. [2024-05-12 10:40:41,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5289855072463768 [2024-05-12 10:40:41,585 INFO L175 Difference]: Start difference. First operand has 382 places, 478 transitions, 7732 flow. Second operand 9 states and 219 transitions. [2024-05-12 10:40:41,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 494 transitions, 8942 flow [2024-05-12 10:40:44,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 494 transitions, 8749 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-05-12 10:40:44,848 INFO L231 Difference]: Finished difference. Result has 385 places, 478 transitions, 7785 flow [2024-05-12 10:40:44,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7539, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=478, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7785, PETRI_PLACES=385, PETRI_TRANSITIONS=478} [2024-05-12 10:40:44,849 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 335 predicate places. [2024-05-12 10:40:44,849 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 478 transitions, 7785 flow [2024-05-12 10:40:44,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.0) internal successors, (162), 9 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:44,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:40:44,849 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] [2024-05-12 10:40:44,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-05-12 10:40:44,850 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:40:44,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:40:44,850 INFO L85 PathProgramCache]: Analyzing trace with hash 1445212638, now seen corresponding path program 2 times [2024-05-12 10:40:44,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:40:44,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452602324] [2024-05-12 10:40:44,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:40:44,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:40:44,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:40:45,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:40:45,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:40:45,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452602324] [2024-05-12 10:40:45,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452602324] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:40:45,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:40:45,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 10:40:45,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795487234] [2024-05-12 10:40:45,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:40:45,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 10:40:45,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:40:45,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 10:40:45,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-05-12 10:40:45,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:40:45,224 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 478 transitions, 7785 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:45,224 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:40:45,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:40:45,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:40:46,893 INFO L124 PetriNetUnfolderBase]: 5357/8953 cut-off events. [2024-05-12 10:40:46,893 INFO L125 PetriNetUnfolderBase]: For 555684/556372 co-relation queries the response was YES. [2024-05-12 10:40:46,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61256 conditions, 8953 events. 5357/8953 cut-off events. For 555684/556372 co-relation queries the response was YES. Maximal size of possible extension queue 543. Compared 65177 event pairs, 1632 based on Foata normal form. 209/8703 useless extension candidates. Maximal degree in co-relation 61075. Up to 7548 conditions per place. [2024-05-12 10:40:47,013 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 351 selfloop transitions, 140 changer transitions 0/506 dead transitions. [2024-05-12 10:40:47,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 506 transitions, 8949 flow [2024-05-12 10:40:47,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 10:40:47,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 10:40:47,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 271 transitions. [2024-05-12 10:40:47,014 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5355731225296443 [2024-05-12 10:40:47,014 INFO L175 Difference]: Start difference. First operand has 385 places, 478 transitions, 7785 flow. Second operand 11 states and 271 transitions. [2024-05-12 10:40:47,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 506 transitions, 8949 flow [2024-05-12 10:40:50,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 506 transitions, 8685 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-05-12 10:40:50,548 INFO L231 Difference]: Finished difference. Result has 389 places, 480 transitions, 7888 flow [2024-05-12 10:40:50,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7521, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=478, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7888, PETRI_PLACES=389, PETRI_TRANSITIONS=480} [2024-05-12 10:40:50,549 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 339 predicate places. [2024-05-12 10:40:50,549 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 480 transitions, 7888 flow [2024-05-12 10:40:50,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:50,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:40:50,549 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] [2024-05-12 10:40:50,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-05-12 10:40:50,549 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:40:50,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:40:50,550 INFO L85 PathProgramCache]: Analyzing trace with hash 1445021337, now seen corresponding path program 13 times [2024-05-12 10:40:50,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:40:50,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483160233] [2024-05-12 10:40:50,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:40:50,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:40:50,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:40:50,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:40:50,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:40:50,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483160233] [2024-05-12 10:40:50,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483160233] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:40:50,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:40:50,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 10:40:50,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319269113] [2024-05-12 10:40:50,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:40:50,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 10:40:50,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:40:50,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 10:40:50,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-05-12 10:40:50,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:40:50,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 480 transitions, 7888 flow. Second operand has 11 states, 11 states have (on average 17.636363636363637) internal successors, (194), 11 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:50,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:40:50,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:40:50,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:40:52,700 INFO L124 PetriNetUnfolderBase]: 5365/8948 cut-off events. [2024-05-12 10:40:52,700 INFO L125 PetriNetUnfolderBase]: For 516272/516889 co-relation queries the response was YES. [2024-05-12 10:40:52,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61806 conditions, 8948 events. 5365/8948 cut-off events. For 516272/516889 co-relation queries the response was YES. Maximal size of possible extension queue 543. Compared 64960 event pairs, 1639 based on Foata normal form. 166/8648 useless extension candidates. Maximal degree in co-relation 61624. Up to 7429 conditions per place. [2024-05-12 10:40:52,828 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 237 selfloop transitions, 258 changer transitions 0/510 dead transitions. [2024-05-12 10:40:52,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 510 transitions, 9635 flow [2024-05-12 10:40:52,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-05-12 10:40:52,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-05-12 10:40:52,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 352 transitions. [2024-05-12 10:40:52,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5101449275362319 [2024-05-12 10:40:52,829 INFO L175 Difference]: Start difference. First operand has 389 places, 480 transitions, 7888 flow. Second operand 15 states and 352 transitions. [2024-05-12 10:40:52,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 510 transitions, 9635 flow [2024-05-12 10:40:55,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 510 transitions, 9300 flow, removed 31 selfloop flow, removed 9 redundant places. [2024-05-12 10:40:55,866 INFO L231 Difference]: Finished difference. Result has 395 places, 483 transitions, 8132 flow [2024-05-12 10:40:55,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7559, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=255, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=8132, PETRI_PLACES=395, PETRI_TRANSITIONS=483} [2024-05-12 10:40:55,867 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 345 predicate places. [2024-05-12 10:40:55,867 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 483 transitions, 8132 flow [2024-05-12 10:40:55,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 17.636363636363637) internal successors, (194), 11 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:55,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:40:55,867 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] [2024-05-12 10:40:55,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-05-12 10:40:55,868 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:40:55,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:40:55,868 INFO L85 PathProgramCache]: Analyzing trace with hash 123796621, now seen corresponding path program 14 times [2024-05-12 10:40:55,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:40:55,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056262205] [2024-05-12 10:40:55,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:40:55,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:40:55,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:40:56,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:40:56,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:40:56,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056262205] [2024-05-12 10:40:56,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056262205] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:40:56,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:40:56,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 10:40:56,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879240996] [2024-05-12 10:40:56,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:40:56,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 10:40:56,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:40:56,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 10:40:56,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-05-12 10:40:56,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:40:56,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 483 transitions, 8132 flow. Second operand has 11 states, 11 states have (on average 17.636363636363637) internal successors, (194), 11 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:40:56,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:40:56,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:40:56,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:40:58,105 INFO L124 PetriNetUnfolderBase]: 5384/8976 cut-off events. [2024-05-12 10:40:58,105 INFO L125 PetriNetUnfolderBase]: For 510098/510750 co-relation queries the response was YES. [2024-05-12 10:40:58,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61485 conditions, 8976 events. 5384/8976 cut-off events. For 510098/510750 co-relation queries the response was YES. Maximal size of possible extension queue 543. Compared 65152 event pairs, 1639 based on Foata normal form. 166/8670 useless extension candidates. Maximal degree in co-relation 61302. Up to 7450 conditions per place. [2024-05-12 10:40:58,207 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 238 selfloop transitions, 262 changer transitions 0/515 dead transitions. [2024-05-12 10:40:58,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 515 transitions, 9950 flow [2024-05-12 10:40:58,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-05-12 10:40:58,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-05-12 10:40:58,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 334 transitions. [2024-05-12 10:40:58,208 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5186335403726708 [2024-05-12 10:40:58,208 INFO L175 Difference]: Start difference. First operand has 395 places, 483 transitions, 8132 flow. Second operand 14 states and 334 transitions. [2024-05-12 10:40:58,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 515 transitions, 9950 flow [2024-05-12 10:41:01,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 515 transitions, 9527 flow, removed 29 selfloop flow, removed 10 redundant places. [2024-05-12 10:41:01,814 INFO L231 Difference]: Finished difference. Result has 399 places, 489 transitions, 8353 flow [2024-05-12 10:41:01,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7735, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=483, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=256, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=8353, PETRI_PLACES=399, PETRI_TRANSITIONS=489} [2024-05-12 10:41:01,814 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 349 predicate places. [2024-05-12 10:41:01,815 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 489 transitions, 8353 flow [2024-05-12 10:41:01,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 17.636363636363637) internal successors, (194), 11 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:01,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:41:01,815 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] [2024-05-12 10:41:01,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-05-12 10:41:01,815 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:41:01,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:41:01,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1444853937, now seen corresponding path program 15 times [2024-05-12 10:41:01,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:41:01,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264166614] [2024-05-12 10:41:01,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:41:01,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:41:01,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:41:02,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:41:02,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:41:02,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264166614] [2024-05-12 10:41:02,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264166614] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:41:02,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:41:02,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 10:41:02,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473739203] [2024-05-12 10:41:02,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:41:02,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 10:41:02,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:41:02,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 10:41:02,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-05-12 10:41:02,192 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:41:02,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 489 transitions, 8353 flow. Second operand has 11 states, 11 states have (on average 17.636363636363637) internal successors, (194), 11 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:02,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:41:02,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:41:02,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:41:03,994 INFO L124 PetriNetUnfolderBase]: 5392/8988 cut-off events. [2024-05-12 10:41:03,995 INFO L125 PetriNetUnfolderBase]: For 519524/520184 co-relation queries the response was YES. [2024-05-12 10:41:04,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61642 conditions, 8988 events. 5392/8988 cut-off events. For 519524/520184 co-relation queries the response was YES. Maximal size of possible extension queue 543. Compared 65195 event pairs, 1639 based on Foata normal form. 166/8679 useless extension candidates. Maximal degree in co-relation 61458. Up to 7459 conditions per place. [2024-05-12 10:41:04,118 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 240 selfloop transitions, 266 changer transitions 0/521 dead transitions. [2024-05-12 10:41:04,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 521 transitions, 10131 flow [2024-05-12 10:41:04,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-05-12 10:41:04,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-05-12 10:41:04,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 388 transitions. [2024-05-12 10:41:04,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4961636828644501 [2024-05-12 10:41:04,120 INFO L175 Difference]: Start difference. First operand has 399 places, 489 transitions, 8353 flow. Second operand 17 states and 388 transitions. [2024-05-12 10:41:04,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 521 transitions, 10131 flow [2024-05-12 10:41:07,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 521 transitions, 9641 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-05-12 10:41:07,895 INFO L231 Difference]: Finished difference. Result has 406 places, 492 transitions, 8451 flow [2024-05-12 10:41:07,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7866, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=263, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=8451, PETRI_PLACES=406, PETRI_TRANSITIONS=492} [2024-05-12 10:41:07,896 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 356 predicate places. [2024-05-12 10:41:07,896 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 492 transitions, 8451 flow [2024-05-12 10:41:07,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 17.636363636363637) internal successors, (194), 11 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:07,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:41:07,896 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] [2024-05-12 10:41:07,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-05-12 10:41:07,896 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:41:07,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:41:07,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1445199897, now seen corresponding path program 16 times [2024-05-12 10:41:07,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:41:07,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247349039] [2024-05-12 10:41:07,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:41:07,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:41:07,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:41:08,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:41:08,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:41:08,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247349039] [2024-05-12 10:41:08,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247349039] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:41:08,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:41:08,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 10:41:08,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467318443] [2024-05-12 10:41:08,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:41:08,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 10:41:08,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:41:08,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 10:41:08,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-05-12 10:41:08,245 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:41:08,246 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 492 transitions, 8451 flow. Second operand has 11 states, 11 states have (on average 17.636363636363637) internal successors, (194), 11 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:08,246 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:41:08,246 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:41:08,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:41:10,079 INFO L124 PetriNetUnfolderBase]: 5389/8984 cut-off events. [2024-05-12 10:41:10,079 INFO L125 PetriNetUnfolderBase]: For 521722/522346 co-relation queries the response was YES. [2024-05-12 10:41:10,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61605 conditions, 8984 events. 5389/8984 cut-off events. For 521722/522346 co-relation queries the response was YES. Maximal size of possible extension queue 543. Compared 65144 event pairs, 1639 based on Foata normal form. 166/8675 useless extension candidates. Maximal degree in co-relation 61420. Up to 7456 conditions per place. [2024-05-12 10:41:10,185 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 234 selfloop transitions, 265 changer transitions 0/514 dead transitions. [2024-05-12 10:41:10,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 514 transitions, 9725 flow [2024-05-12 10:41:10,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-05-12 10:41:10,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-05-12 10:41:10,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 286 transitions. [2024-05-12 10:41:10,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5181159420289855 [2024-05-12 10:41:10,187 INFO L175 Difference]: Start difference. First operand has 406 places, 492 transitions, 8451 flow. Second operand 12 states and 286 transitions. [2024-05-12 10:41:10,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 514 transitions, 9725 flow [2024-05-12 10:41:14,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 514 transitions, 8976 flow, removed 8 selfloop flow, removed 16 redundant places. [2024-05-12 10:41:14,063 INFO L231 Difference]: Finished difference. Result has 402 places, 492 transitions, 8238 flow [2024-05-12 10:41:14,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7702, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=265, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8238, PETRI_PLACES=402, PETRI_TRANSITIONS=492} [2024-05-12 10:41:14,064 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 352 predicate places. [2024-05-12 10:41:14,064 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 492 transitions, 8238 flow [2024-05-12 10:41:14,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 17.636363636363637) internal successors, (194), 11 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:14,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:41:14,065 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] [2024-05-12 10:41:14,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-05-12 10:41:14,065 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:41:14,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:41:14,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1444848357, now seen corresponding path program 17 times [2024-05-12 10:41:14,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:41:14,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256290400] [2024-05-12 10:41:14,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:41:14,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:41:14,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:41:14,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:41:14,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:41:14,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256290400] [2024-05-12 10:41:14,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256290400] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:41:14,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:41:14,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 10:41:14,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356819083] [2024-05-12 10:41:14,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:41:14,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 10:41:14,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:41:14,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 10:41:14,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-05-12 10:41:14,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:41:14,412 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 492 transitions, 8238 flow. Second operand has 11 states, 11 states have (on average 17.636363636363637) internal successors, (194), 11 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:14,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:41:14,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:41:14,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:41:16,735 INFO L124 PetriNetUnfolderBase]: 5386/8980 cut-off events. [2024-05-12 10:41:16,736 INFO L125 PetriNetUnfolderBase]: For 521110/521732 co-relation queries the response was YES. [2024-05-12 10:41:16,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61402 conditions, 8980 events. 5386/8980 cut-off events. For 521110/521732 co-relation queries the response was YES. Maximal size of possible extension queue 543. Compared 65201 event pairs, 1639 based on Foata normal form. 166/8671 useless extension candidates. Maximal degree in co-relation 61216. Up to 7453 conditions per place. [2024-05-12 10:41:16,844 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 236 selfloop transitions, 266 changer transitions 0/517 dead transitions. [2024-05-12 10:41:16,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 517 transitions, 9526 flow [2024-05-12 10:41:16,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-05-12 10:41:16,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-05-12 10:41:16,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 346 transitions. [2024-05-12 10:41:16,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5014492753623189 [2024-05-12 10:41:16,845 INFO L175 Difference]: Start difference. First operand has 402 places, 492 transitions, 8238 flow. Second operand 15 states and 346 transitions. [2024-05-12 10:41:16,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 517 transitions, 9526 flow [2024-05-12 10:41:20,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 517 transitions, 8988 flow, removed 4 selfloop flow, removed 11 redundant places. [2024-05-12 10:41:20,427 INFO L231 Difference]: Finished difference. Result has 406 places, 492 transitions, 8238 flow [2024-05-12 10:41:20,428 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7700, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=266, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=8238, PETRI_PLACES=406, PETRI_TRANSITIONS=492} [2024-05-12 10:41:20,428 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 356 predicate places. [2024-05-12 10:41:20,428 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 492 transitions, 8238 flow [2024-05-12 10:41:20,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 17.636363636363637) internal successors, (194), 11 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:20,428 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:41:20,428 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-05-12 10:41:20,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-05-12 10:41:20,429 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:41:20,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:41:20,429 INFO L85 PathProgramCache]: Analyzing trace with hash 1848760311, now seen corresponding path program 18 times [2024-05-12 10:41:20,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:41:20,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445696085] [2024-05-12 10:41:20,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:41:20,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:41:20,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:41:20,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:41:20,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:41:20,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445696085] [2024-05-12 10:41:20,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445696085] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:41:20,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:41:20,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-05-12 10:41:20,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410728392] [2024-05-12 10:41:20,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:41:20,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-05-12 10:41:20,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:41:20,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-05-12 10:41:20,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-05-12 10:41:20,764 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:41:20,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 492 transitions, 8238 flow. Second operand has 11 states, 11 states have (on average 17.636363636363637) internal successors, (194), 11 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:20,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:41:20,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:41:20,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:41:22,902 INFO L124 PetriNetUnfolderBase]: 5383/8976 cut-off events. [2024-05-12 10:41:22,903 INFO L125 PetriNetUnfolderBase]: For 522834/523534 co-relation queries the response was YES. [2024-05-12 10:41:22,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61335 conditions, 8976 events. 5383/8976 cut-off events. For 522834/523534 co-relation queries the response was YES. Maximal size of possible extension queue 543. Compared 65154 event pairs, 1639 based on Foata normal form. 166/8667 useless extension candidates. Maximal degree in co-relation 61148. Up to 7450 conditions per place. [2024-05-12 10:41:23,012 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 236 selfloop transitions, 265 changer transitions 0/516 dead transitions. [2024-05-12 10:41:23,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 516 transitions, 9524 flow [2024-05-12 10:41:23,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-05-12 10:41:23,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-05-12 10:41:23,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 332 transitions. [2024-05-12 10:41:23,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.515527950310559 [2024-05-12 10:41:23,016 INFO L175 Difference]: Start difference. First operand has 406 places, 492 transitions, 8238 flow. Second operand 14 states and 332 transitions. [2024-05-12 10:41:23,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 516 transitions, 9524 flow [2024-05-12 10:41:26,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 516 transitions, 8984 flow, removed 4 selfloop flow, removed 14 redundant places. [2024-05-12 10:41:26,107 INFO L231 Difference]: Finished difference. Result has 406 places, 492 transitions, 8234 flow [2024-05-12 10:41:26,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7698, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=265, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=8234, PETRI_PLACES=406, PETRI_TRANSITIONS=492} [2024-05-12 10:41:26,108 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 356 predicate places. [2024-05-12 10:41:26,108 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 492 transitions, 8234 flow [2024-05-12 10:41:26,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 17.636363636363637) internal successors, (194), 11 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:26,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:41:26,109 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] [2024-05-12 10:41:26,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-05-12 10:41:26,109 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:41:26,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:41:26,109 INFO L85 PathProgramCache]: Analyzing trace with hash 1357441782, now seen corresponding path program 3 times [2024-05-12 10:41:26,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:41:26,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599754785] [2024-05-12 10:41:26,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:41:26,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:41:26,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:41:26,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:41:26,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:41:26,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599754785] [2024-05-12 10:41:26,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599754785] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:41:26,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:41:26,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:41:26,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976628888] [2024-05-12 10:41:26,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:41:26,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:41:26,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:41:26,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:41:26,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:41:26,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:41:26,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 492 transitions, 8234 flow. Second operand has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:26,512 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:41:26,512 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:41:26,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:41:28,656 INFO L124 PetriNetUnfolderBase]: 5478/9126 cut-off events. [2024-05-12 10:41:28,657 INFO L125 PetriNetUnfolderBase]: For 597830/598466 co-relation queries the response was YES. [2024-05-12 10:41:28,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63176 conditions, 9126 events. 5478/9126 cut-off events. For 597830/598466 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 66358 event pairs, 1677 based on Foata normal form. 123/8766 useless extension candidates. Maximal degree in co-relation 62988. Up to 7822 conditions per place. [2024-05-12 10:41:28,764 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 414 selfloop transitions, 86 changer transitions 0/515 dead transitions. [2024-05-12 10:41:28,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 515 transitions, 9404 flow [2024-05-12 10:41:28,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 10:41:28,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 10:41:28,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 224 transitions. [2024-05-12 10:41:28,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5410628019323671 [2024-05-12 10:41:28,766 INFO L175 Difference]: Start difference. First operand has 406 places, 492 transitions, 8234 flow. Second operand 9 states and 224 transitions. [2024-05-12 10:41:28,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 515 transitions, 9404 flow [2024-05-12 10:41:32,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 515 transitions, 8847 flow, removed 0 selfloop flow, removed 14 redundant places. [2024-05-12 10:41:32,764 INFO L231 Difference]: Finished difference. Result has 401 places, 494 transitions, 7940 flow [2024-05-12 10:41:32,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7677, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7940, PETRI_PLACES=401, PETRI_TRANSITIONS=494} [2024-05-12 10:41:32,765 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 351 predicate places. [2024-05-12 10:41:32,765 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 494 transitions, 7940 flow [2024-05-12 10:41:32,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:32,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:41:32,766 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] [2024-05-12 10:41:32,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-05-12 10:41:32,766 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:41:32,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:41:32,766 INFO L85 PathProgramCache]: Analyzing trace with hash 1366012662, now seen corresponding path program 4 times [2024-05-12 10:41:32,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:41:32,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794369639] [2024-05-12 10:41:32,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:41:32,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:41:32,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:41:33,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:41:33,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:41:33,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794369639] [2024-05-12 10:41:33,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794369639] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:41:33,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:41:33,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:41:33,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959201363] [2024-05-12 10:41:33,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:41:33,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:41:33,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:41:33,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:41:33,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:41:33,180 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:41:33,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 494 transitions, 7940 flow. Second operand has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:33,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:41:33,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:41:33,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:41:35,565 INFO L124 PetriNetUnfolderBase]: 6096/10224 cut-off events. [2024-05-12 10:41:35,566 INFO L125 PetriNetUnfolderBase]: For 847968/848587 co-relation queries the response was YES. [2024-05-12 10:41:35,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73422 conditions, 10224 events. 6096/10224 cut-off events. For 847968/848587 co-relation queries the response was YES. Maximal size of possible extension queue 637. Compared 76466 event pairs, 1872 based on Foata normal form. 117/9851 useless extension candidates. Maximal degree in co-relation 73233. Up to 7175 conditions per place. [2024-05-12 10:41:35,689 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 419 selfloop transitions, 95 changer transitions 0/529 dead transitions. [2024-05-12 10:41:35,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 529 transitions, 9493 flow [2024-05-12 10:41:35,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 10:41:35,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 10:41:35,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 232 transitions. [2024-05-12 10:41:35,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5603864734299517 [2024-05-12 10:41:35,690 INFO L175 Difference]: Start difference. First operand has 401 places, 494 transitions, 7940 flow. Second operand 9 states and 232 transitions. [2024-05-12 10:41:35,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 529 transitions, 9493 flow [2024-05-12 10:41:40,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 529 transitions, 9285 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-05-12 10:41:40,763 INFO L231 Difference]: Finished difference. Result has 405 places, 499 transitions, 8130 flow [2024-05-12 10:41:40,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7736, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8130, PETRI_PLACES=405, PETRI_TRANSITIONS=499} [2024-05-12 10:41:40,764 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 355 predicate places. [2024-05-12 10:41:40,764 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 499 transitions, 8130 flow [2024-05-12 10:41:40,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:40,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:41:40,764 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] [2024-05-12 10:41:40,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-05-12 10:41:40,764 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:41:40,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:41:40,765 INFO L85 PathProgramCache]: Analyzing trace with hash 1357429041, now seen corresponding path program 19 times [2024-05-12 10:41:40,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:41:40,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323177409] [2024-05-12 10:41:40,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:41:40,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:41:40,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:41:41,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:41:41,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:41:41,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323177409] [2024-05-12 10:41:41,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323177409] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:41:41,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:41:41,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 10:41:41,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777611874] [2024-05-12 10:41:41,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:41:41,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 10:41:41,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:41:41,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 10:41:41,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-05-12 10:41:41,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:41:41,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 499 transitions, 8130 flow. Second operand has 10 states, 10 states have (on average 17.8) internal successors, (178), 10 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:41,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:41:41,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:41:41,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:41:43,389 INFO L124 PetriNetUnfolderBase]: 6093/10161 cut-off events. [2024-05-12 10:41:43,389 INFO L125 PetriNetUnfolderBase]: For 780741/781381 co-relation queries the response was YES. [2024-05-12 10:41:43,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73202 conditions, 10161 events. 6093/10161 cut-off events. For 780741/781381 co-relation queries the response was YES. Maximal size of possible extension queue 637. Compared 75874 event pairs, 2028 based on Foata normal form. 95/9744 useless extension candidates. Maximal degree in co-relation 73011. Up to 8836 conditions per place. [2024-05-12 10:41:43,535 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 384 selfloop transitions, 116 changer transitions 0/515 dead transitions. [2024-05-12 10:41:43,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 515 transitions, 9174 flow [2024-05-12 10:41:43,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-05-12 10:41:43,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-05-12 10:41:43,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 238 transitions. [2024-05-12 10:41:43,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5173913043478261 [2024-05-12 10:41:43,536 INFO L175 Difference]: Start difference. First operand has 405 places, 499 transitions, 8130 flow. Second operand 10 states and 238 transitions. [2024-05-12 10:41:43,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 515 transitions, 9174 flow [2024-05-12 10:41:48,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 515 transitions, 9023 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-05-12 10:41:48,748 INFO L231 Difference]: Finished difference. Result has 411 places, 499 transitions, 8217 flow [2024-05-12 10:41:48,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7979, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=383, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8217, PETRI_PLACES=411, PETRI_TRANSITIONS=499} [2024-05-12 10:41:48,748 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 361 predicate places. [2024-05-12 10:41:48,748 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 499 transitions, 8217 flow [2024-05-12 10:41:48,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.8) internal successors, (178), 10 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:48,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:41:48,749 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] [2024-05-12 10:41:48,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-05-12 10:41:48,749 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:41:48,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:41:48,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1400778383, now seen corresponding path program 20 times [2024-05-12 10:41:48,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:41:48,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243263645] [2024-05-12 10:41:48,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:41:48,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:41:48,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:41:49,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:41:49,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:41:49,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243263645] [2024-05-12 10:41:49,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243263645] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:41:49,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:41:49,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:41:49,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263512830] [2024-05-12 10:41:49,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:41:49,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:41:49,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:41:49,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:41:49,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:41:49,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:41:49,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 499 transitions, 8217 flow. Second operand has 9 states, 9 states have (on average 18.0) internal successors, (162), 9 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:49,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:41:49,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:41:49,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:41:51,356 INFO L124 PetriNetUnfolderBase]: 6112/10189 cut-off events. [2024-05-12 10:41:51,357 INFO L125 PetriNetUnfolderBase]: For 771374/772008 co-relation queries the response was YES. [2024-05-12 10:41:51,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72646 conditions, 10189 events. 6112/10189 cut-off events. For 771374/772008 co-relation queries the response was YES. Maximal size of possible extension queue 637. Compared 75987 event pairs, 2028 based on Foata normal form. 132/9803 useless extension candidates. Maximal degree in co-relation 72453. Up to 8889 conditions per place. [2024-05-12 10:41:51,493 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 442 selfloop transitions, 75 changer transitions 0/532 dead transitions. [2024-05-12 10:41:51,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 532 transitions, 9677 flow [2024-05-12 10:41:51,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 10:41:51,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 10:41:51,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 265 transitions. [2024-05-12 10:41:51,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5237154150197628 [2024-05-12 10:41:51,495 INFO L175 Difference]: Start difference. First operand has 411 places, 499 transitions, 8217 flow. Second operand 11 states and 265 transitions. [2024-05-12 10:41:51,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 532 transitions, 9677 flow [2024-05-12 10:41:56,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 532 transitions, 9412 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-05-12 10:41:56,650 INFO L231 Difference]: Finished difference. Result has 412 places, 505 transitions, 8238 flow [2024-05-12 10:41:56,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=7952, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8238, PETRI_PLACES=412, PETRI_TRANSITIONS=505} [2024-05-12 10:41:56,650 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 362 predicate places. [2024-05-12 10:41:56,650 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 505 transitions, 8238 flow [2024-05-12 10:41:56,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.0) internal successors, (162), 9 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:56,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:41:56,651 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] [2024-05-12 10:41:56,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-05-12 10:41:56,651 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:41:56,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:41:56,655 INFO L85 PathProgramCache]: Analyzing trace with hash -1400767223, now seen corresponding path program 21 times [2024-05-12 10:41:56,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:41:56,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764605101] [2024-05-12 10:41:56,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:41:56,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:41:56,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:41:56,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:41:56,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:41:56,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764605101] [2024-05-12 10:41:56,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764605101] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:41:56,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:41:56,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:41:56,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507449625] [2024-05-12 10:41:56,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:41:56,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:41:56,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:41:56,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:41:56,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:41:57,048 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:41:57,048 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 505 transitions, 8238 flow. Second operand has 9 states, 9 states have (on average 18.0) internal successors, (162), 9 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:41:57,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:41:57,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:41:57,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:41:59,362 INFO L124 PetriNetUnfolderBase]: 6109/10185 cut-off events. [2024-05-12 10:41:59,362 INFO L125 PetriNetUnfolderBase]: For 775208/775839 co-relation queries the response was YES. [2024-05-12 10:41:59,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72513 conditions, 10185 events. 6109/10185 cut-off events. For 775208/775839 co-relation queries the response was YES. Maximal size of possible extension queue 637. Compared 75979 event pairs, 2028 based on Foata normal form. 132/9799 useless extension candidates. Maximal degree in co-relation 72319. Up to 8886 conditions per place. [2024-05-12 10:41:59,488 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 437 selfloop transitions, 74 changer transitions 0/526 dead transitions. [2024-05-12 10:41:59,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 526 transitions, 9322 flow [2024-05-12 10:41:59,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 10:41:59,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 10:41:59,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 222 transitions. [2024-05-12 10:41:59,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5362318840579711 [2024-05-12 10:41:59,489 INFO L175 Difference]: Start difference. First operand has 412 places, 505 transitions, 8238 flow. Second operand 9 states and 222 transitions. [2024-05-12 10:41:59,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 526 transitions, 9322 flow [2024-05-12 10:42:04,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 526 transitions, 9216 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-05-12 10:42:04,103 INFO L231 Difference]: Finished difference. Result has 415 places, 505 transitions, 8286 flow [2024-05-12 10:42:04,103 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=8132, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=505, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8286, PETRI_PLACES=415, PETRI_TRANSITIONS=505} [2024-05-12 10:42:04,104 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 365 predicate places. [2024-05-12 10:42:04,104 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 505 transitions, 8286 flow [2024-05-12 10:42:04,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.0) internal successors, (162), 9 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:42:04,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:42:04,105 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] [2024-05-12 10:42:04,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-05-12 10:42:04,105 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:42:04,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:42:04,105 INFO L85 PathProgramCache]: Analyzing trace with hash -1387880213, now seen corresponding path program 22 times [2024-05-12 10:42:04,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:42:04,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567682392] [2024-05-12 10:42:04,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:42:04,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:42:04,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:42:04,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:42:04,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:42:04,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567682392] [2024-05-12 10:42:04,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567682392] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:42:04,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:42:04,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:42:04,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255737127] [2024-05-12 10:42:04,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:42:04,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:42:04,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:42:04,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:42:04,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:42:04,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:42:04,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 505 transitions, 8286 flow. Second operand has 8 states, 8 states have (on average 18.25) internal successors, (146), 8 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:42:04,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:42:04,420 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:42:04,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:42:06,663 INFO L124 PetriNetUnfolderBase]: 6139/10229 cut-off events. [2024-05-12 10:42:06,664 INFO L125 PetriNetUnfolderBase]: For 800892/801525 co-relation queries the response was YES. [2024-05-12 10:42:06,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73464 conditions, 10229 events. 6139/10229 cut-off events. For 800892/801525 co-relation queries the response was YES. Maximal size of possible extension queue 637. Compared 76366 event pairs, 2037 based on Foata normal form. 138/9840 useless extension candidates. Maximal degree in co-relation 73268. Up to 8708 conditions per place. [2024-05-12 10:42:06,985 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 323 selfloop transitions, 196 changer transitions 0/534 dead transitions. [2024-05-12 10:42:06,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 534 transitions, 10015 flow [2024-05-12 10:42:06,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:42:06,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:42:06,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-05-12 10:42:06,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-05-12 10:42:06,986 INFO L175 Difference]: Start difference. First operand has 415 places, 505 transitions, 8286 flow. Second operand 8 states and 207 transitions. [2024-05-12 10:42:06,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 534 transitions, 10015 flow [2024-05-12 10:42:11,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 534 transitions, 9867 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-05-12 10:42:11,845 INFO L231 Difference]: Finished difference. Result has 415 places, 514 transitions, 8715 flow [2024-05-12 10:42:11,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=8138, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=505, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=187, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8715, PETRI_PLACES=415, PETRI_TRANSITIONS=514} [2024-05-12 10:42:11,845 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 365 predicate places. [2024-05-12 10:42:11,846 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 514 transitions, 8715 flow [2024-05-12 10:42:11,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.25) internal successors, (146), 8 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:42:11,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:42:11,846 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] [2024-05-12 10:42:11,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-05-12 10:42:11,846 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:42:11,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:42:11,847 INFO L85 PathProgramCache]: Analyzing trace with hash -1628852513, now seen corresponding path program 23 times [2024-05-12 10:42:11,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:42:11,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465047957] [2024-05-12 10:42:11,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:42:11,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:42:11,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:42:12,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:42:12,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:42:12,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465047957] [2024-05-12 10:42:12,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465047957] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:42:12,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:42:12,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 10:42:12,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090337722] [2024-05-12 10:42:12,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:42:12,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 10:42:12,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:42:12,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 10:42:12,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-05-12 10:42:12,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:42:12,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 514 transitions, 8715 flow. Second operand has 10 states, 10 states have (on average 17.8) internal successors, (178), 10 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:42:12,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:42:12,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:42:12,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:42:14,662 INFO L124 PetriNetUnfolderBase]: 6136/10225 cut-off events. [2024-05-12 10:42:14,662 INFO L125 PetriNetUnfolderBase]: For 808882/809539 co-relation queries the response was YES. [2024-05-12 10:42:14,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73840 conditions, 10225 events. 6136/10225 cut-off events. For 808882/809539 co-relation queries the response was YES. Maximal size of possible extension queue 637. Compared 76366 event pairs, 2028 based on Foata normal form. 132/9830 useless extension candidates. Maximal degree in co-relation 73644. Up to 8911 conditions per place. [2024-05-12 10:42:14,800 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 450 selfloop transitions, 81 changer transitions 0/546 dead transitions. [2024-05-12 10:42:14,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 546 transitions, 10099 flow [2024-05-12 10:42:14,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-05-12 10:42:14,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-05-12 10:42:14,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 309 transitions. [2024-05-12 10:42:14,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5167224080267558 [2024-05-12 10:42:14,801 INFO L175 Difference]: Start difference. First operand has 415 places, 514 transitions, 8715 flow. Second operand 13 states and 309 transitions. [2024-05-12 10:42:14,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 546 transitions, 10099 flow [2024-05-12 10:42:22,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 546 transitions, 9709 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-05-12 10:42:22,082 INFO L231 Difference]: Finished difference. Result has 423 places, 514 transitions, 8493 flow [2024-05-12 10:42:22,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=8325, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=433, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=8493, PETRI_PLACES=423, PETRI_TRANSITIONS=514} [2024-05-12 10:42:22,083 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 373 predicate places. [2024-05-12 10:42:22,083 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 514 transitions, 8493 flow [2024-05-12 10:42:22,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.8) internal successors, (178), 10 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:42:22,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:42:22,083 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] [2024-05-12 10:42:22,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-05-12 10:42:22,084 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:42:22,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:42:22,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1334063279, now seen corresponding path program 24 times [2024-05-12 10:42:22,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:42:22,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877959] [2024-05-12 10:42:22,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:42:22,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:42:22,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:42:22,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:42:22,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:42:22,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877959] [2024-05-12 10:42:22,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877959] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:42:22,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:42:22,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-05-12 10:42:22,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319303286] [2024-05-12 10:42:22,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:42:22,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-05-12 10:42:22,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:42:22,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-05-12 10:42:22,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-05-12 10:42:22,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:42:22,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 514 transitions, 8493 flow. Second operand has 10 states, 10 states have (on average 17.8) internal successors, (178), 10 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:42:22,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:42:22,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:42:22,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:42:24,899 INFO L124 PetriNetUnfolderBase]: 6144/10237 cut-off events. [2024-05-12 10:42:24,899 INFO L125 PetriNetUnfolderBase]: For 818329/818914 co-relation queries the response was YES. [2024-05-12 10:42:24,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73672 conditions, 10237 events. 6144/10237 cut-off events. For 818329/818914 co-relation queries the response was YES. Maximal size of possible extension queue 637. Compared 76414 event pairs, 2028 based on Foata normal form. 120/9827 useless extension candidates. Maximal degree in co-relation 73474. Up to 8920 conditions per place. [2024-05-12 10:42:25,036 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 452 selfloop transitions, 84 changer transitions 0/551 dead transitions. [2024-05-12 10:42:25,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 551 transitions, 9961 flow [2024-05-12 10:42:25,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-05-12 10:42:25,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-05-12 10:42:25,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 349 transitions. [2024-05-12 10:42:25,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5057971014492754 [2024-05-12 10:42:25,037 INFO L175 Difference]: Start difference. First operand has 423 places, 514 transitions, 8493 flow. Second operand 15 states and 349 transitions. [2024-05-12 10:42:25,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 551 transitions, 9961 flow [2024-05-12 10:42:30,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 551 transitions, 9761 flow, removed 17 selfloop flow, removed 9 redundant places. [2024-05-12 10:42:30,197 INFO L231 Difference]: Finished difference. Result has 429 places, 517 transitions, 8535 flow [2024-05-12 10:42:30,197 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=8305, PETRI_DIFFERENCE_MINUEND_PLACES=414, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=433, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=8535, PETRI_PLACES=429, PETRI_TRANSITIONS=517} [2024-05-12 10:42:30,198 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 379 predicate places. [2024-05-12 10:42:30,198 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 517 transitions, 8535 flow [2024-05-12 10:42:30,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.8) internal successors, (178), 10 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:42:30,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:42:30,198 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] [2024-05-12 10:42:30,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-05-12 10:42:30,198 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:42:30,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:42:30,199 INFO L85 PathProgramCache]: Analyzing trace with hash -1628679533, now seen corresponding path program 25 times [2024-05-12 10:42:30,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:42:30,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902907351] [2024-05-12 10:42:30,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:42:30,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:42:30,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:42:30,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:42:30,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:42:30,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902907351] [2024-05-12 10:42:30,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902907351] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:42:30,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:42:30,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:42:30,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028389673] [2024-05-12 10:42:30,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:42:30,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:42:30,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:42:30,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:42:30,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:42:30,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:42:30,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 517 transitions, 8535 flow. Second operand has 9 states, 9 states have (on average 18.0) internal successors, (162), 9 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:42:30,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:42:30,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:42:30,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:42:32,911 INFO L124 PetriNetUnfolderBase]: 6152/10249 cut-off events. [2024-05-12 10:42:32,912 INFO L125 PetriNetUnfolderBase]: For 831555/832138 co-relation queries the response was YES. [2024-05-12 10:42:33,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73851 conditions, 10249 events. 6152/10249 cut-off events. For 831555/832138 co-relation queries the response was YES. Maximal size of possible extension queue 637. Compared 76443 event pairs, 2028 based on Foata normal form. 182/9898 useless extension candidates. Maximal degree in co-relation 73652. Up to 8781 conditions per place. [2024-05-12 10:42:33,042 INFO L140 encePairwiseOnDemand]: 34/46 looper letters, 346 selfloop transitions, 184 changer transitions 0/545 dead transitions. [2024-05-12 10:42:33,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 545 transitions, 10201 flow [2024-05-12 10:42:33,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-05-12 10:42:33,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-05-12 10:42:33,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 267 transitions. [2024-05-12 10:42:33,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5276679841897233 [2024-05-12 10:42:33,043 INFO L175 Difference]: Start difference. First operand has 429 places, 517 transitions, 8535 flow. Second operand 11 states and 267 transitions. [2024-05-12 10:42:33,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 545 transitions, 10201 flow [2024-05-12 10:42:39,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 545 transitions, 10025 flow, removed 4 selfloop flow, removed 13 redundant places. [2024-05-12 10:42:39,898 INFO L231 Difference]: Finished difference. Result has 427 places, 520 transitions, 8809 flow [2024-05-12 10:42:39,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=8359, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=517, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8809, PETRI_PLACES=427, PETRI_TRANSITIONS=520} [2024-05-12 10:42:39,899 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 377 predicate places. [2024-05-12 10:42:39,899 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 520 transitions, 8809 flow [2024-05-12 10:42:39,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.0) internal successors, (162), 9 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:42:39,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:42:39,900 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] [2024-05-12 10:42:39,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-05-12 10:42:39,900 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:42:39,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:42:39,900 INFO L85 PathProgramCache]: Analyzing trace with hash -519224981, now seen corresponding path program 26 times [2024-05-12 10:42:39,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:42:39,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530851488] [2024-05-12 10:42:39,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:42:39,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:42:39,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:42:40,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:42:40,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:42:40,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530851488] [2024-05-12 10:42:40,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530851488] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:42:40,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:42:40,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-05-12 10:42:40,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858249394] [2024-05-12 10:42:40,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:42:40,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-05-12 10:42:40,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:42:40,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-05-12 10:42:40,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-05-12 10:42:40,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:42:40,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 520 transitions, 8809 flow. Second operand has 9 states, 9 states have (on average 18.0) internal successors, (162), 9 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:42:40,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:42:40,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:42:40,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:42:42,583 INFO L124 PetriNetUnfolderBase]: 6160/10261 cut-off events. [2024-05-12 10:42:42,583 INFO L125 PetriNetUnfolderBase]: For 845814/846400 co-relation queries the response was YES. [2024-05-12 10:42:42,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74414 conditions, 10261 events. 6160/10261 cut-off events. For 845814/846400 co-relation queries the response was YES. Maximal size of possible extension queue 637. Compared 76578 event pairs, 2037 based on Foata normal form. 81/9806 useless extension candidates. Maximal degree in co-relation 74214. Up to 8550 conditions per place. [2024-05-12 10:42:42,733 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 226 selfloop transitions, 302 changer transitions 0/543 dead transitions. [2024-05-12 10:42:42,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 543 transitions, 10225 flow [2024-05-12 10:42:42,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 10:42:42,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 10:42:42,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 228 transitions. [2024-05-12 10:42:42,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5507246376811594 [2024-05-12 10:42:42,734 INFO L175 Difference]: Start difference. First operand has 427 places, 520 transitions, 8809 flow. Second operand 9 states and 228 transitions. [2024-05-12 10:42:42,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 543 transitions, 10225 flow [2024-05-12 10:42:48,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 543 transitions, 9439 flow, removed 8 selfloop flow, removed 14 redundant places. [2024-05-12 10:42:48,627 INFO L231 Difference]: Finished difference. Result has 422 places, 523 transitions, 8705 flow [2024-05-12 10:42:48,627 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=8027, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=520, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=299, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8705, PETRI_PLACES=422, PETRI_TRANSITIONS=523} [2024-05-12 10:42:48,627 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 372 predicate places. [2024-05-12 10:42:48,628 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 523 transitions, 8705 flow [2024-05-12 10:42:48,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.0) internal successors, (162), 9 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:42:48,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:42:48,628 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] [2024-05-12 10:42:48,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-05-12 10:42:48,628 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:42:48,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:42:48,629 INFO L85 PathProgramCache]: Analyzing trace with hash -1628668373, now seen corresponding path program 27 times [2024-05-12 10:42:48,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:42:48,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862056099] [2024-05-12 10:42:48,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:42:48,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:42:48,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:42:48,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:42:48,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:42:48,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862056099] [2024-05-12 10:42:48,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862056099] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:42:48,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:42:48,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:42:48,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915907465] [2024-05-12 10:42:48,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:42:48,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:42:48,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:42:48,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:42:48,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:42:48,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:42:48,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 523 transitions, 8705 flow. Second operand has 8 states, 8 states have (on average 18.25) internal successors, (146), 8 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:42:48,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:42:48,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:42:48,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:42:51,299 INFO L124 PetriNetUnfolderBase]: 6157/10257 cut-off events. [2024-05-12 10:42:51,299 INFO L125 PetriNetUnfolderBase]: For 824011/824576 co-relation queries the response was YES. [2024-05-12 10:42:51,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74319 conditions, 10257 events. 6157/10257 cut-off events. For 824011/824576 co-relation queries the response was YES. Maximal size of possible extension queue 637. Compared 76530 event pairs, 2028 based on Foata normal form. 152/9873 useless extension candidates. Maximal degree in co-relation 74121. Up to 8788 conditions per place. [2024-05-12 10:42:51,445 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 350 selfloop transitions, 178 changer transitions 0/543 dead transitions. [2024-05-12 10:42:51,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 543 transitions, 10051 flow [2024-05-12 10:42:51,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-05-12 10:42:51,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-05-12 10:42:51,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 228 transitions. [2024-05-12 10:42:51,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5507246376811594 [2024-05-12 10:42:51,447 INFO L175 Difference]: Start difference. First operand has 422 places, 523 transitions, 8705 flow. Second operand 9 states and 228 transitions. [2024-05-12 10:42:51,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 543 transitions, 10051 flow [2024-05-12 10:42:56,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 543 transitions, 9367 flow, removed 29 selfloop flow, removed 8 redundant places. [2024-05-12 10:42:56,635 INFO L231 Difference]: Finished difference. Result has 423 places, 523 transitions, 8391 flow [2024-05-12 10:42:56,636 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=46, PETRI_DIFFERENCE_MINUEND_FLOW=8021, PETRI_DIFFERENCE_MINUEND_PLACES=414, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=523, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=178, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8391, PETRI_PLACES=423, PETRI_TRANSITIONS=523} [2024-05-12 10:42:56,636 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 373 predicate places. [2024-05-12 10:42:56,636 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 523 transitions, 8391 flow [2024-05-12 10:42:56,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.25) internal successors, (146), 8 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:42:56,636 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-05-12 10:42:56,636 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] [2024-05-12 10:42:56,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-05-12 10:42:56,637 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 4 more)] === [2024-05-12 10:42:56,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-05-12 10:42:56,637 INFO L85 PathProgramCache]: Analyzing trace with hash -1628488232, now seen corresponding path program 5 times [2024-05-12 10:42:56,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-05-12 10:42:56,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649615258] [2024-05-12 10:42:56,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-05-12 10:42:56,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-05-12 10:42:56,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-05-12 10:42:56,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-05-12 10:42:56,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-05-12 10:42:56,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649615258] [2024-05-12 10:42:56,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649615258] provided 1 perfect and 0 imperfect interpolant sequences [2024-05-12 10:42:56,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-05-12 10:42:56,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-05-12 10:42:56,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167170763] [2024-05-12 10:42:56,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-05-12 10:42:56,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-05-12 10:42:56,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-05-12 10:42:56,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-05-12 10:42:56,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-05-12 10:42:56,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 46 [2024-05-12 10:42:56,971 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 523 transitions, 8391 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-05-12 10:42:56,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-05-12 10:42:56,971 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 46 [2024-05-12 10:42:56,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-05-12 10:42:59,432 INFO L124 PetriNetUnfolderBase]: 6178/10293 cut-off events. [2024-05-12 10:42:59,432 INFO L125 PetriNetUnfolderBase]: For 844482/845060 co-relation queries the response was YES. [2024-05-12 10:42:59,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74393 conditions, 10293 events. 6178/10293 cut-off events. For 844482/845060 co-relation queries the response was YES. Maximal size of possible extension queue 640. Compared 76954 event pairs, 2030 based on Foata normal form. 121/9876 useless extension candidates. Maximal degree in co-relation 74194. Up to 9053 conditions per place. [2024-05-12 10:42:59,567 INFO L140 encePairwiseOnDemand]: 35/46 looper letters, 488 selfloop transitions, 46 changer transitions 0/549 dead transitions. [2024-05-12 10:42:59,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 549 transitions, 9611 flow [2024-05-12 10:42:59,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-05-12 10:42:59,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-05-12 10:42:59,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-05-12 10:42:59,569 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5597826086956522 [2024-05-12 10:42:59,569 INFO L175 Difference]: Start difference. First operand has 423 places, 523 transitions, 8391 flow. Second operand 8 states and 206 transitions. [2024-05-12 10:42:59,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 549 transitions, 9611 flow