./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe027_pso.oepc_pso.opt_tso.oepc_tso.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/mutex-meet/safe027_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version bcb38a6f 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/safe027_pso.oepc_pso.opt_tso.oepc_tso.opt.i ./goblint.2024-05-21_14-57-05.files/mutex-meet/safe027_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-bcb38a6-m [2024-06-04 16:14:40,820 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-04 16:14:40,861 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-04 16:14:40,864 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-04 16:14:40,864 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-04 16:14:40,913 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-04 16:14:40,914 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-04 16:14:40,915 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-04 16:14:40,915 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-04 16:14:40,918 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-04 16:14:40,919 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-04 16:14:40,919 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-04 16:14:40,920 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-04 16:14:40,921 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-04 16:14:40,921 INFO L153 SettingsManager]: * Use SBE=true [2024-06-04 16:14:40,921 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-04 16:14:40,921 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-04 16:14:40,922 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-04 16:14:40,922 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-04 16:14:40,922 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-04 16:14:40,922 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-04 16:14:40,922 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-04 16:14:40,923 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-04 16:14:40,923 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-04 16:14:40,923 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-04 16:14:40,923 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-04 16:14:40,924 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-04 16:14:40,924 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-04 16:14:40,924 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-04 16:14:40,925 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-04 16:14:40,925 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-04 16:14:40,925 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-04 16:14:40,926 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-04 16:14:40,926 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-04 16:14:40,926 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-04 16:14:40,926 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-04 16:14:40,926 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-04 16:14:40,926 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-04 16:14:40,927 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-04 16:14:40,927 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-04 16:14:40,927 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-04 16:14:40,927 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-04 16:14:40,928 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-04 16:14:40,928 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-04 16:14:41,112 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-04 16:14:41,125 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-04 16:14:41,127 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-04 16:14:41,128 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-04 16:14:41,128 INFO L274 PluginConnector]: CDTParser initialized [2024-06-04 16:14:41,129 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe027_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-04 16:14:42,114 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-04 16:14:42,298 INFO L384 CDTParser]: Found 1 translation units. [2024-06-04 16:14:42,299 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe027_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-04 16:14:42,314 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d971d562c/afdf484d6a9040deb3eb94fc252dc9a0/FLAG87a8874a0 [2024-06-04 16:14:42,324 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d971d562c/afdf484d6a9040deb3eb94fc252dc9a0 [2024-06-04 16:14:42,326 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-04 16:14:42,326 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-04 16:14:42,327 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/mutex-meet/safe027_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml [2024-06-04 16:14:42,423 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-04 16:14:42,424 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-04 16:14:42,424 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-04 16:14:42,424 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-04 16:14:42,428 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-04 16:14:42,429 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.06 04:14:42" (1/2) ... [2024-06-04 16:14:42,429 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a9a33f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:14:42, skipping insertion in model container [2024-06-04 16:14:42,429 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.06 04:14:42" (1/2) ... [2024-06-04 16:14:42,430 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2916b79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:14:42, skipping insertion in model container [2024-06-04 16:14:42,431 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 04:14:42" (2/2) ... [2024-06-04 16:14:42,431 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a9a33f1 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 04:14:42, skipping insertion in model container [2024-06-04 16:14:42,431 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 04:14:42" (2/2) ... [2024-06-04 16:14:42,431 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-04 16:14:42,498 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-04 16:14:42,499 INFO L97 edCorrectnessWitness]: Location invariant before [L795-L795] ((((((((! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! 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 )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p0_EBX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$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 )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )x + (long long )y >= 0LL))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((((((((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p0_EBX) && 0 <= __unbuffered_p2_EAX) && 0 <= __unbuffered_p2_EBX) && 0 <= x) && 0 <= y) && __unbuffered_p0_EAX <= 1) && __unbuffered_p0_EBX <= 1) && __unbuffered_p2_EAX <= 1) && __unbuffered_p2_EBX <= 1) && x <= 1) && y <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1))) [2024-06-04 16:14:42,500 INFO L97 edCorrectnessWitness]: Location invariant before [L798-L798] ((((((((! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((((((((((((((((((((((((((((long long )__unbuffered_cnt + (long long )__unbuffered_p0_EAX >= 0LL && (long long )__unbuffered_cnt + (long long )__unbuffered_p0_EBX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$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 )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )main$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 )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EBX + (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)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((((((((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p0_EBX) && 0 <= __unbuffered_p2_EAX) && 0 <= __unbuffered_p2_EBX) && 0 <= x) && 0 <= y) && __unbuffered_p0_EAX <= 1) && __unbuffered_p0_EBX <= 1) && __unbuffered_p2_EAX <= 1) && __unbuffered_p2_EBX <= 1) && x <= 1) && y <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1))) [2024-06-04 16:14:42,500 INFO L97 edCorrectnessWitness]: Location invariant before [L797-L797] ((((((((! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! 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 )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p0_EBX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$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 )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )x + (long long )y >= 0LL))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((((((((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p0_EBX) && 0 <= __unbuffered_p2_EAX) && 0 <= __unbuffered_p2_EBX) && 0 <= x) && 0 <= y) && __unbuffered_p0_EAX <= 1) && __unbuffered_p0_EBX <= 1) && __unbuffered_p2_EAX <= 1) && __unbuffered_p2_EBX <= 1) && x <= 1) && y <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1))) [2024-06-04 16:14:42,500 INFO L97 edCorrectnessWitness]: Location invariant before [L793-L793] ((((((((! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((((((((((((((((((((((((((((long long )__unbuffered_cnt + (long long )__unbuffered_p0_EAX >= 0LL && (long long )__unbuffered_cnt + (long long )__unbuffered_p0_EBX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$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 )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )main$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 )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EBX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EBX + (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)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((((((((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p0_EBX) && 0 <= __unbuffered_p2_EAX) && 0 <= __unbuffered_p2_EBX) && 0 <= x) && 0 <= y) && __unbuffered_p0_EAX <= 1) && __unbuffered_p0_EBX <= 1) && __unbuffered_p2_EAX <= 1) && __unbuffered_p2_EBX <= 1) && x <= 1) && y <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1))) [2024-06-04 16:14:42,501 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-04 16:14:42,501 INFO L106 edCorrectnessWitness]: ghost_update [L791-L791] multithreaded = 1; [2024-06-04 16:14:42,539 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-04 16:14:42,801 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-04 16:14:42,818 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-04 16:14:42,996 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-04 16:14:43,054 INFO L206 MainTranslator]: Completed translation [2024-06-04 16:14:43,055 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 04:14:43 WrapperNode [2024-06-04 16:14:43,055 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-04 16:14:43,057 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-04 16:14:43,057 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-04 16:14:43,057 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-04 16:14:43,062 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 04.06 04:14:43" (1/1) ... [2024-06-04 16:14:43,076 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 04.06 04:14:43" (1/1) ... [2024-06-04 16:14:43,101 INFO L138 Inliner]: procedures = 176, calls = 47, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 75 [2024-06-04 16:14:43,101 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-04 16:14:43,102 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-04 16:14:43,102 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-04 16:14:43,102 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-04 16:14:43,110 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 04:14:43" (1/1) ... [2024-06-04 16:14:43,111 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 04:14:43" (1/1) ... [2024-06-04 16:14:43,113 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 04:14:43" (1/1) ... [2024-06-04 16:14:43,137 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-04 16:14:43,137 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 04:14:43" (1/1) ... [2024-06-04 16:14:43,137 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 04:14:43" (1/1) ... [2024-06-04 16:14:43,143 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 04:14:43" (1/1) ... [2024-06-04 16:14:43,144 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 04:14:43" (1/1) ... [2024-06-04 16:14:43,146 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 04:14:43" (1/1) ... [2024-06-04 16:14:43,147 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 04:14:43" (1/1) ... [2024-06-04 16:14:43,149 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-04 16:14:43,150 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-04 16:14:43,150 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-04 16:14:43,150 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-04 16:14:43,151 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 04:14:43" (1/1) ... [2024-06-04 16:14:43,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-04 16:14:43,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-04 16:14:43,170 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-04 16:14:43,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-04 16:14:43,199 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-04 16:14:43,199 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-04 16:14:43,200 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-04 16:14:43,200 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-04 16:14:43,200 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-04 16:14:43,200 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-04 16:14:43,200 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-04 16:14:43,200 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-04 16:14:43,200 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-04 16:14:43,200 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-04 16:14:43,201 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-04 16:14:43,201 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-04 16:14:43,201 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-04 16:14:43,201 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-04 16:14:43,202 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-04 16:14:43,281 INFO L244 CfgBuilder]: Building ICFG [2024-06-04 16:14:43,282 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-04 16:14:43,542 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-04 16:14:43,542 INFO L293 CfgBuilder]: Performing block encoding [2024-06-04 16:14:43,636 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-04 16:14:43,636 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-04 16:14:43,642 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.06 04:14:43 BoogieIcfgContainer [2024-06-04 16:14:43,642 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-04 16:14:43,645 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-04 16:14:43,645 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-04 16:14:43,647 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-04 16:14:43,648 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.06 04:14:42" (1/4) ... [2024-06-04 16:14:43,648 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@102329f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.06 04:14:43, skipping insertion in model container [2024-06-04 16:14:43,648 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 04:14:42" (2/4) ... [2024-06-04 16:14:43,648 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@102329f9 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 04.06 04:14:43, skipping insertion in model container [2024-06-04 16:14:43,649 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 04:14:43" (3/4) ... [2024-06-04 16:14:43,649 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@102329f9 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 04.06 04:14:43, skipping insertion in model container [2024-06-04 16:14:43,649 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.06 04:14:43" (4/4) ... [2024-06-04 16:14:43,650 INFO L112 eAbstractionObserver]: Analyzing ICFG safe027_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-04 16:14:43,664 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-04 16:14:43,664 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-04 16:14:43,664 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-04 16:14:43,724 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-04 16:14:43,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 63 places, 50 transitions, 116 flow [2024-06-04 16:14:43,803 INFO L124 PetriNetUnfolderBase]: 0/46 cut-off events. [2024-06-04 16:14:43,803 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-04 16:14:43,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59 conditions, 46 events. 0/46 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 81 event pairs, 0 based on Foata normal form. 0/42 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-04 16:14:43,805 INFO L82 GeneralOperation]: Start removeDead. Operand has 63 places, 50 transitions, 116 flow [2024-06-04 16:14:43,813 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 53 places, 40 transitions, 92 flow [2024-06-04 16:14:43,820 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-04 16:14:43,825 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;@3634b131, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-04 16:14:43,825 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-04 16:14:43,828 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-04 16:14:43,828 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-04 16:14:43,829 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-04 16:14:43,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:14:43,829 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-04 16:14:43,830 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 16:14:43,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:14:43,834 INFO L85 PathProgramCache]: Analyzing trace with hash -1398728841, now seen corresponding path program 1 times [2024-06-04 16:14:43,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:14:43,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658944184] [2024-06-04 16:14:43,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:14:43,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:14:43,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:14:44,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:14:44,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:14:44,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658944184] [2024-06-04 16:14:44,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658944184] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:14:44,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:14:44,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-04 16:14:44,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645034206] [2024-06-04 16:14:44,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:14:44,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-04 16:14:44,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:14:44,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-04 16:14:44,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-04 16:14:44,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 50 [2024-06-04 16:14:44,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 40 transitions, 92 flow. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:44,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:14:44,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 50 [2024-06-04 16:14:44,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:14:44,780 INFO L124 PetriNetUnfolderBase]: 1447/2146 cut-off events. [2024-06-04 16:14:44,780 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2024-06-04 16:14:44,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4338 conditions, 2146 events. 1447/2146 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 11653 event pairs, 968 based on Foata normal form. 1/2065 useless extension candidates. Maximal degree in co-relation 4322. Up to 2069 conditions per place. [2024-06-04 16:14:44,801 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 37 selfloop transitions, 5 changer transitions 0/54 dead transitions. [2024-06-04 16:14:44,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 54 transitions, 213 flow [2024-06-04 16:14:44,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-04 16:14:44,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-04 16:14:44,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 106 transitions. [2024-06-04 16:14:44,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7066666666666667 [2024-06-04 16:14:44,811 INFO L175 Difference]: Start difference. First operand has 53 places, 40 transitions, 92 flow. Second operand 3 states and 106 transitions. [2024-06-04 16:14:44,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 54 transitions, 213 flow [2024-06-04 16:14:44,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 54 transitions, 206 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-04 16:14:44,818 INFO L231 Difference]: Finished difference. Result has 52 places, 44 transitions, 127 flow [2024-06-04 16:14:44,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=127, PETRI_PLACES=52, PETRI_TRANSITIONS=44} [2024-06-04 16:14:44,823 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, -1 predicate places. [2024-06-04 16:14:44,823 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 44 transitions, 127 flow [2024-06-04 16:14:44,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:44,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:14:44,824 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:14:44,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-04 16:14:44,825 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 16:14:44,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:14:44,826 INFO L85 PathProgramCache]: Analyzing trace with hash 1098718867, now seen corresponding path program 1 times [2024-06-04 16:14:44,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:14:44,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038127280] [2024-06-04 16:14:44,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:14:44,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:14:44,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:14:45,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:14:45,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:14:45,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038127280] [2024-06-04 16:14:45,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038127280] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:14:45,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:14:45,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:14:45,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301791765] [2024-06-04 16:14:45,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:14:45,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:14:45,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:14:45,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:14:45,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:14:45,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 50 [2024-06-04 16:14:45,355 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 44 transitions, 127 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) [2024-06-04 16:14:45,355 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:14:45,355 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 50 [2024-06-04 16:14:45,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:14:45,701 INFO L124 PetriNetUnfolderBase]: 2467/3606 cut-off events. [2024-06-04 16:14:45,701 INFO L125 PetriNetUnfolderBase]: For 758/950 co-relation queries the response was YES. [2024-06-04 16:14:45,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8518 conditions, 3606 events. 2467/3606 cut-off events. For 758/950 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 19391 event pairs, 1331 based on Foata normal form. 35/3610 useless extension candidates. Maximal degree in co-relation 8503. Up to 3263 conditions per place. [2024-06-04 16:14:45,721 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 53 selfloop transitions, 7 changer transitions 0/70 dead transitions. [2024-06-04 16:14:45,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 70 transitions, 315 flow [2024-06-04 16:14:45,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-04 16:14:45,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-04 16:14:45,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 136 transitions. [2024-06-04 16:14:45,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.68 [2024-06-04 16:14:45,726 INFO L175 Difference]: Start difference. First operand has 52 places, 44 transitions, 127 flow. Second operand 4 states and 136 transitions. [2024-06-04 16:14:45,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 70 transitions, 315 flow [2024-06-04 16:14:45,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 70 transitions, 310 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-04 16:14:45,729 INFO L231 Difference]: Finished difference. Result has 54 places, 45 transitions, 154 flow [2024-06-04 16:14:45,729 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=154, PETRI_PLACES=54, PETRI_TRANSITIONS=45} [2024-06-04 16:14:45,730 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 1 predicate places. [2024-06-04 16:14:45,730 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 45 transitions, 154 flow [2024-06-04 16:14:45,732 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) [2024-06-04 16:14:45,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:14:45,732 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:14:45,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-04 16:14:45,733 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 16:14:45,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:14:45,739 INFO L85 PathProgramCache]: Analyzing trace with hash 721389010, now seen corresponding path program 1 times [2024-06-04 16:14:45,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:14:45,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133876487] [2024-06-04 16:14:45,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:14:45,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:14:45,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:14:46,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:14:46,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:14:46,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133876487] [2024-06-04 16:14:46,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133876487] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:14:46,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:14:46,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-04 16:14:46,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440972474] [2024-06-04 16:14:46,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:14:46,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-04 16:14:46,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:14:46,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-04 16:14:46,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-04 16:14:46,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 50 [2024-06-04 16:14:46,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 45 transitions, 154 flow. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:46,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:14:46,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 50 [2024-06-04 16:14:46,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:14:46,528 INFO L124 PetriNetUnfolderBase]: 2618/4065 cut-off events. [2024-06-04 16:14:46,528 INFO L125 PetriNetUnfolderBase]: For 1862/1910 co-relation queries the response was YES. [2024-06-04 16:14:46,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9970 conditions, 4065 events. 2618/4065 cut-off events. For 1862/1910 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 23317 event pairs, 1356 based on Foata normal form. 3/4041 useless extension candidates. Maximal degree in co-relation 9953. Up to 3654 conditions per place. [2024-06-04 16:14:46,551 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 51 selfloop transitions, 9 changer transitions 0/70 dead transitions. [2024-06-04 16:14:46,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 70 transitions, 346 flow [2024-06-04 16:14:46,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-04 16:14:46,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-04 16:14:46,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 129 transitions. [2024-06-04 16:14:46,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.645 [2024-06-04 16:14:46,553 INFO L175 Difference]: Start difference. First operand has 54 places, 45 transitions, 154 flow. Second operand 4 states and 129 transitions. [2024-06-04 16:14:46,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 70 transitions, 346 flow [2024-06-04 16:14:46,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 70 transitions, 332 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-04 16:14:46,556 INFO L231 Difference]: Finished difference. Result has 57 places, 53 transitions, 214 flow [2024-06-04 16:14:46,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=214, PETRI_PLACES=57, PETRI_TRANSITIONS=53} [2024-06-04 16:14:46,557 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 4 predicate places. [2024-06-04 16:14:46,557 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 53 transitions, 214 flow [2024-06-04 16:14:46,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:46,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:14:46,557 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:14:46,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-04 16:14:46,558 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 16:14:46,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:14:46,558 INFO L85 PathProgramCache]: Analyzing trace with hash 1765159729, now seen corresponding path program 1 times [2024-06-04 16:14:46,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:14:46,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157399245] [2024-06-04 16:14:46,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:14:46,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:14:46,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:14:46,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:14:46,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:14:46,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157399245] [2024-06-04 16:14:46,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157399245] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:14:46,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:14:46,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-04 16:14:46,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313429909] [2024-06-04 16:14:46,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:14:46,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-04 16:14:46,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:14:46,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-04 16:14:46,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-04 16:14:46,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 50 [2024-06-04 16:14:46,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 53 transitions, 214 flow. Second operand has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:46,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:14:46,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 50 [2024-06-04 16:14:46,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:14:47,366 INFO L124 PetriNetUnfolderBase]: 2603/4010 cut-off events. [2024-06-04 16:14:47,367 INFO L125 PetriNetUnfolderBase]: For 3311/3363 co-relation queries the response was YES. [2024-06-04 16:14:47,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11039 conditions, 4010 events. 2603/4010 cut-off events. For 3311/3363 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 22824 event pairs, 1272 based on Foata normal form. 6/3972 useless extension candidates. Maximal degree in co-relation 11020. Up to 3603 conditions per place. [2024-06-04 16:14:47,387 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 59 selfloop transitions, 12 changer transitions 0/81 dead transitions. [2024-06-04 16:14:47,387 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 81 transitions, 436 flow [2024-06-04 16:14:47,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:14:47,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:14:47,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 158 transitions. [2024-06-04 16:14:47,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.632 [2024-06-04 16:14:47,389 INFO L175 Difference]: Start difference. First operand has 57 places, 53 transitions, 214 flow. Second operand 5 states and 158 transitions. [2024-06-04 16:14:47,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 81 transitions, 436 flow [2024-06-04 16:14:47,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 81 transitions, 432 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-04 16:14:47,392 INFO L231 Difference]: Finished difference. Result has 62 places, 56 transitions, 266 flow [2024-06-04 16:14:47,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=266, PETRI_PLACES=62, PETRI_TRANSITIONS=56} [2024-06-04 16:14:47,393 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 9 predicate places. [2024-06-04 16:14:47,393 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 56 transitions, 266 flow [2024-06-04 16:14:47,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:47,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:14:47,394 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:14:47,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-04 16:14:47,394 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 16:14:47,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:14:47,394 INFO L85 PathProgramCache]: Analyzing trace with hash -187121951, now seen corresponding path program 1 times [2024-06-04 16:14:47,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:14:47,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997274822] [2024-06-04 16:14:47,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:14:47,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:14:47,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:14:47,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:14:47,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:14:47,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997274822] [2024-06-04 16:14:47,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997274822] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:14:47,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:14:47,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:14:47,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414788038] [2024-06-04 16:14:47,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:14:47,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:14:47,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:14:47,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:14:47,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:14:47,756 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-04 16:14:47,756 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 56 transitions, 266 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) [2024-06-04 16:14:47,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:14:47,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-04 16:14:47,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:14:48,192 INFO L124 PetriNetUnfolderBase]: 3372/5077 cut-off events. [2024-06-04 16:14:48,192 INFO L125 PetriNetUnfolderBase]: For 6315/6366 co-relation queries the response was YES. [2024-06-04 16:14:48,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15120 conditions, 5077 events. 3372/5077 cut-off events. For 6315/6366 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 28307 event pairs, 1298 based on Foata normal form. 16/5064 useless extension candidates. Maximal degree in co-relation 15098. Up to 4533 conditions per place. [2024-06-04 16:14:48,220 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 57 selfloop transitions, 17 changer transitions 0/83 dead transitions. [2024-06-04 16:14:48,220 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 83 transitions, 508 flow [2024-06-04 16:14:48,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-04 16:14:48,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-04 16:14:48,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 132 transitions. [2024-06-04 16:14:48,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.66 [2024-06-04 16:14:48,221 INFO L175 Difference]: Start difference. First operand has 62 places, 56 transitions, 266 flow. Second operand 4 states and 132 transitions. [2024-06-04 16:14:48,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 83 transitions, 508 flow [2024-06-04 16:14:48,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 83 transitions, 478 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-04 16:14:48,227 INFO L231 Difference]: Finished difference. Result has 63 places, 62 transitions, 334 flow [2024-06-04 16:14:48,228 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=334, PETRI_PLACES=63, PETRI_TRANSITIONS=62} [2024-06-04 16:14:48,228 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 10 predicate places. [2024-06-04 16:14:48,228 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 62 transitions, 334 flow [2024-06-04 16:14:48,229 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) [2024-06-04 16:14:48,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:14:48,229 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:14:48,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-04 16:14:48,229 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 16:14:48,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:14:48,230 INFO L85 PathProgramCache]: Analyzing trace with hash -167339921, now seen corresponding path program 2 times [2024-06-04 16:14:48,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:14:48,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571012437] [2024-06-04 16:14:48,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:14:48,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:14:48,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:14:48,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:14:48,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:14:48,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571012437] [2024-06-04 16:14:48,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571012437] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:14:48,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:14:48,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:14:48,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278719585] [2024-06-04 16:14:48,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:14:48,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:14:48,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:14:48,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:14:48,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:14:48,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-04 16:14:48,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 62 transitions, 334 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) [2024-06-04 16:14:48,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:14:48,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-04 16:14:48,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:14:49,078 INFO L124 PetriNetUnfolderBase]: 3363/5187 cut-off events. [2024-06-04 16:14:49,078 INFO L125 PetriNetUnfolderBase]: For 9840/10023 co-relation queries the response was YES. [2024-06-04 16:14:49,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17172 conditions, 5187 events. 3363/5187 cut-off events. For 9840/10023 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 29767 event pairs, 1431 based on Foata normal form. 18/5171 useless extension candidates. Maximal degree in co-relation 17149. Up to 4575 conditions per place. [2024-06-04 16:14:49,112 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 70 selfloop transitions, 20 changer transitions 0/99 dead transitions. [2024-06-04 16:14:49,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 99 transitions, 672 flow [2024-06-04 16:14:49,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:14:49,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:14:49,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 158 transitions. [2024-06-04 16:14:49,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.632 [2024-06-04 16:14:49,114 INFO L175 Difference]: Start difference. First operand has 63 places, 62 transitions, 334 flow. Second operand 5 states and 158 transitions. [2024-06-04 16:14:49,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 99 transitions, 672 flow [2024-06-04 16:14:49,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 99 transitions, 606 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-04 16:14:49,127 INFO L231 Difference]: Finished difference. Result has 68 places, 73 transitions, 449 flow [2024-06-04 16:14:49,128 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=449, PETRI_PLACES=68, PETRI_TRANSITIONS=73} [2024-06-04 16:14:49,130 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 15 predicate places. [2024-06-04 16:14:49,130 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 73 transitions, 449 flow [2024-06-04 16:14:49,130 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) [2024-06-04 16:14:49,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:14:49,131 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:14:49,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-04 16:14:49,131 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 16:14:49,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:14:49,131 INFO L85 PathProgramCache]: Analyzing trace with hash -1155763418, now seen corresponding path program 1 times [2024-06-04 16:14:49,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:14:49,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241178573] [2024-06-04 16:14:49,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:14:49,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:14:49,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:14:49,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:14:49,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:14:49,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241178573] [2024-06-04 16:14:49,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241178573] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:14:49,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:14:49,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:14:49,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197169510] [2024-06-04 16:14:49,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:14:49,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:14:49,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:14:49,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:14:49,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:14:49,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-04 16:14:49,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 73 transitions, 449 flow. Second operand has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:49,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:14:49,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-04 16:14:49,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:14:50,304 INFO L124 PetriNetUnfolderBase]: 4824/7274 cut-off events. [2024-06-04 16:14:50,304 INFO L125 PetriNetUnfolderBase]: For 18241/18455 co-relation queries the response was YES. [2024-06-04 16:14:50,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25586 conditions, 7274 events. 4824/7274 cut-off events. For 18241/18455 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 43869 event pairs, 1097 based on Foata normal form. 104/7312 useless extension candidates. Maximal degree in co-relation 25560. Up to 4682 conditions per place. [2024-06-04 16:14:50,347 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 89 selfloop transitions, 34 changer transitions 0/132 dead transitions. [2024-06-04 16:14:50,347 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 132 transitions, 951 flow [2024-06-04 16:14:50,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:14:50,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:14:50,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 204 transitions. [2024-06-04 16:14:50,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.68 [2024-06-04 16:14:50,349 INFO L175 Difference]: Start difference. First operand has 68 places, 73 transitions, 449 flow. Second operand 6 states and 204 transitions. [2024-06-04 16:14:50,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 132 transitions, 951 flow [2024-06-04 16:14:50,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 132 transitions, 919 flow, removed 16 selfloop flow, removed 0 redundant places. [2024-06-04 16:14:50,362 INFO L231 Difference]: Finished difference. Result has 75 places, 81 transitions, 596 flow [2024-06-04 16:14:50,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=417, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=596, PETRI_PLACES=75, PETRI_TRANSITIONS=81} [2024-06-04 16:14:50,363 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 22 predicate places. [2024-06-04 16:14:50,363 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 81 transitions, 596 flow [2024-06-04 16:14:50,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:50,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:14:50,363 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:14:50,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-04 16:14:50,363 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 16:14:50,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:14:50,364 INFO L85 PathProgramCache]: Analyzing trace with hash -546121448, now seen corresponding path program 2 times [2024-06-04 16:14:50,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:14:50,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110852808] [2024-06-04 16:14:50,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:14:50,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:14:50,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:14:50,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:14:50,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:14:50,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110852808] [2024-06-04 16:14:50,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110852808] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:14:50,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:14:50,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:14:50,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197609114] [2024-06-04 16:14:50,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:14:50,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:14:50,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:14:50,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:14:50,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:14:50,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-04 16:14:50,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 81 transitions, 596 flow. Second operand has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:50,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:14:50,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-04 16:14:50,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:14:51,446 INFO L124 PetriNetUnfolderBase]: 4554/6934 cut-off events. [2024-06-04 16:14:51,446 INFO L125 PetriNetUnfolderBase]: For 24495/24729 co-relation queries the response was YES. [2024-06-04 16:14:51,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26099 conditions, 6934 events. 4554/6934 cut-off events. For 24495/24729 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 41837 event pairs, 1415 based on Foata normal form. 122/6984 useless extension candidates. Maximal degree in co-relation 26069. Up to 5428 conditions per place. [2024-06-04 16:14:51,489 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 79 selfloop transitions, 29 changer transitions 0/117 dead transitions. [2024-06-04 16:14:51,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 117 transitions, 942 flow [2024-06-04 16:14:51,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:14:51,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:14:51,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 166 transitions. [2024-06-04 16:14:51,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.664 [2024-06-04 16:14:51,491 INFO L175 Difference]: Start difference. First operand has 75 places, 81 transitions, 596 flow. Second operand 5 states and 166 transitions. [2024-06-04 16:14:51,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 117 transitions, 942 flow [2024-06-04 16:14:51,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 117 transitions, 890 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-06-04 16:14:51,517 INFO L231 Difference]: Finished difference. Result has 78 places, 83 transitions, 648 flow [2024-06-04 16:14:51,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=550, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=648, PETRI_PLACES=78, PETRI_TRANSITIONS=83} [2024-06-04 16:14:51,519 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 25 predicate places. [2024-06-04 16:14:51,519 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 83 transitions, 648 flow [2024-06-04 16:14:51,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:51,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:14:51,520 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:14:51,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-04 16:14:51,520 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 16:14:51,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:14:51,521 INFO L85 PathProgramCache]: Analyzing trace with hash 679773506, now seen corresponding path program 3 times [2024-06-04 16:14:51,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:14:51,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027124353] [2024-06-04 16:14:51,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:14:51,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:14:51,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:14:51,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:14:51,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:14:51,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027124353] [2024-06-04 16:14:51,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027124353] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:14:51,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:14:51,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:14:51,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72945771] [2024-06-04 16:14:51,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:14:51,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:14:51,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:14:51,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:14:51,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:14:51,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-04 16:14:51,888 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 83 transitions, 648 flow. Second operand has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:51,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:14:51,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-04 16:14:51,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:14:52,726 INFO L124 PetriNetUnfolderBase]: 4631/7074 cut-off events. [2024-06-04 16:14:52,727 INFO L125 PetriNetUnfolderBase]: For 25173/25461 co-relation queries the response was YES. [2024-06-04 16:14:52,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27072 conditions, 7074 events. 4631/7074 cut-off events. For 25173/25461 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 42819 event pairs, 1615 based on Foata normal form. 34/7042 useless extension candidates. Maximal degree in co-relation 27040. Up to 6275 conditions per place. [2024-06-04 16:14:52,784 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 91 selfloop transitions, 22 changer transitions 0/122 dead transitions. [2024-06-04 16:14:52,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 122 transitions, 1002 flow [2024-06-04 16:14:52,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:14:52,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:14:52,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 188 transitions. [2024-06-04 16:14:52,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6266666666666667 [2024-06-04 16:14:52,786 INFO L175 Difference]: Start difference. First operand has 78 places, 83 transitions, 648 flow. Second operand 6 states and 188 transitions. [2024-06-04 16:14:52,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 122 transitions, 1002 flow [2024-06-04 16:14:52,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 122 transitions, 954 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-06-04 16:14:52,826 INFO L231 Difference]: Finished difference. Result has 81 places, 85 transitions, 684 flow [2024-06-04 16:14:52,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=600, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=684, PETRI_PLACES=81, PETRI_TRANSITIONS=85} [2024-06-04 16:14:52,827 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 28 predicate places. [2024-06-04 16:14:52,827 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 85 transitions, 684 flow [2024-06-04 16:14:52,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:52,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:14:52,827 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:14:52,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-04 16:14:52,828 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 16:14:52,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:14:52,828 INFO L85 PathProgramCache]: Analyzing trace with hash 679957956, now seen corresponding path program 1 times [2024-06-04 16:14:52,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:14:52,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534299441] [2024-06-04 16:14:52,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:14:52,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:14:52,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:14:53,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:14:53,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:14:53,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534299441] [2024-06-04 16:14:53,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534299441] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:14:53,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:14:53,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:14:53,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939497182] [2024-06-04 16:14:53,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:14:53,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:14:53,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:14:53,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:14:53,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:14:53,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-04 16:14:53,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 85 transitions, 684 flow. Second operand has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:53,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:14:53,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-04 16:14:53,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:14:53,945 INFO L124 PetriNetUnfolderBase]: 4592/7017 cut-off events. [2024-06-04 16:14:53,946 INFO L125 PetriNetUnfolderBase]: For 27468/27756 co-relation queries the response was YES. [2024-06-04 16:14:53,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27212 conditions, 7017 events. 4592/7017 cut-off events. For 27468/27756 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 42383 event pairs, 1399 based on Foata normal form. 28/6979 useless extension candidates. Maximal degree in co-relation 27179. Up to 5876 conditions per place. [2024-06-04 16:14:53,991 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 91 selfloop transitions, 28 changer transitions 0/128 dead transitions. [2024-06-04 16:14:53,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 128 transitions, 1065 flow [2024-06-04 16:14:53,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:14:53,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:14:53,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 190 transitions. [2024-06-04 16:14:53,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6333333333333333 [2024-06-04 16:14:53,993 INFO L175 Difference]: Start difference. First operand has 81 places, 85 transitions, 684 flow. Second operand 6 states and 190 transitions. [2024-06-04 16:14:53,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 128 transitions, 1065 flow [2024-06-04 16:14:54,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 128 transitions, 1011 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-04 16:14:54,028 INFO L231 Difference]: Finished difference. Result has 83 places, 87 transitions, 738 flow [2024-06-04 16:14:54,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=612, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=738, PETRI_PLACES=83, PETRI_TRANSITIONS=87} [2024-06-04 16:14:54,030 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 30 predicate places. [2024-06-04 16:14:54,032 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 87 transitions, 738 flow [2024-06-04 16:14:54,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.857142857142858) internal successors, (132), 7 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:54,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:14:54,032 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:14:54,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-04 16:14:54,033 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 16:14:54,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:14:54,033 INFO L85 PathProgramCache]: Analyzing trace with hash -1703392822, now seen corresponding path program 1 times [2024-06-04 16:14:54,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:14:54,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928440653] [2024-06-04 16:14:54,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:14:54,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:14:54,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:14:54,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:14:54,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:14:54,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928440653] [2024-06-04 16:14:54,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928440653] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:14:54,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:14:54,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-04 16:14:54,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30272728] [2024-06-04 16:14:54,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:14:54,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-04 16:14:54,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:14:54,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-04 16:14:54,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-04 16:14:54,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 50 [2024-06-04 16:14:54,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 87 transitions, 738 flow. Second operand has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:54,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:14:54,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 50 [2024-06-04 16:14:54,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:14:54,798 INFO L124 PetriNetUnfolderBase]: 3701/5679 cut-off events. [2024-06-04 16:14:54,798 INFO L125 PetriNetUnfolderBase]: For 26485/26706 co-relation queries the response was YES. [2024-06-04 16:14:54,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23361 conditions, 5679 events. 3701/5679 cut-off events. For 26485/26706 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 33961 event pairs, 1373 based on Foata normal form. 6/5626 useless extension candidates. Maximal degree in co-relation 23326. Up to 5213 conditions per place. [2024-06-04 16:14:54,832 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 89 selfloop transitions, 20 changer transitions 0/119 dead transitions. [2024-06-04 16:14:54,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 119 transitions, 1112 flow [2024-06-04 16:14:54,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:14:54,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:14:54,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 155 transitions. [2024-06-04 16:14:54,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.62 [2024-06-04 16:14:54,835 INFO L175 Difference]: Start difference. First operand has 83 places, 87 transitions, 738 flow. Second operand 5 states and 155 transitions. [2024-06-04 16:14:54,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 119 transitions, 1112 flow [2024-06-04 16:14:54,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 119 transitions, 1053 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-04 16:14:54,865 INFO L231 Difference]: Finished difference. Result has 87 places, 98 transitions, 868 flow [2024-06-04 16:14:54,865 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=679, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=868, PETRI_PLACES=87, PETRI_TRANSITIONS=98} [2024-06-04 16:14:54,866 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 34 predicate places. [2024-06-04 16:14:54,866 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 98 transitions, 868 flow [2024-06-04 16:14:54,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.8) internal successors, (104), 5 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:54,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:14:54,866 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:14:54,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-04 16:14:54,867 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 16:14:54,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:14:54,867 INFO L85 PathProgramCache]: Analyzing trace with hash 260177026, now seen corresponding path program 1 times [2024-06-04 16:14:54,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:14:54,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681169445] [2024-06-04 16:14:54,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:14:54,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:14:54,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:14:55,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:14:55,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:14:55,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681169445] [2024-06-04 16:14:55,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681169445] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:14:55,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:14:55,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-04 16:14:55,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245210914] [2024-06-04 16:14:55,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:14:55,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-04 16:14:55,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:14:55,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-04 16:14:55,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-04 16:14:55,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 50 [2024-06-04 16:14:55,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 98 transitions, 868 flow. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:55,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:14:55,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 50 [2024-06-04 16:14:55,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:14:55,809 INFO L124 PetriNetUnfolderBase]: 5235/7922 cut-off events. [2024-06-04 16:14:55,810 INFO L125 PetriNetUnfolderBase]: For 41689/41796 co-relation queries the response was YES. [2024-06-04 16:14:55,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31932 conditions, 7922 events. 5235/7922 cut-off events. For 41689/41796 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 48613 event pairs, 1984 based on Foata normal form. 13/7779 useless extension candidates. Maximal degree in co-relation 31894. Up to 7087 conditions per place. [2024-06-04 16:14:55,865 INFO L140 encePairwiseOnDemand]: 43/50 looper letters, 78 selfloop transitions, 11 changer transitions 0/119 dead transitions. [2024-06-04 16:14:55,865 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 119 transitions, 1144 flow [2024-06-04 16:14:55,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-04 16:14:55,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-04 16:14:55,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 120 transitions. [2024-06-04 16:14:55,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-04 16:14:55,870 INFO L175 Difference]: Start difference. First operand has 87 places, 98 transitions, 868 flow. Second operand 4 states and 120 transitions. [2024-06-04 16:14:55,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 119 transitions, 1144 flow [2024-06-04 16:14:55,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 119 transitions, 1102 flow, removed 21 selfloop flow, removed 0 redundant places. [2024-06-04 16:14:55,948 INFO L231 Difference]: Finished difference. Result has 92 places, 108 transitions, 949 flow [2024-06-04 16:14:55,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=826, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=949, PETRI_PLACES=92, PETRI_TRANSITIONS=108} [2024-06-04 16:14:55,949 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 39 predicate places. [2024-06-04 16:14:55,949 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 108 transitions, 949 flow [2024-06-04 16:14:55,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:55,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:14:55,950 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:14:55,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-04 16:14:55,950 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 16:14:55,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:14:55,950 INFO L85 PathProgramCache]: Analyzing trace with hash -580774871, now seen corresponding path program 1 times [2024-06-04 16:14:55,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:14:55,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578814026] [2024-06-04 16:14:55,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:14:55,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:14:55,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:14:56,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:14:56,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:14:56,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578814026] [2024-06-04 16:14:56,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578814026] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:14:56,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:14:56,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:14:56,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123165363] [2024-06-04 16:14:56,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:14:56,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:14:56,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:14:56,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:14:56,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:14:56,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 50 [2024-06-04 16:14:56,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 108 transitions, 949 flow. Second operand has 6 states, 6 states have (on average 20.5) internal successors, (123), 6 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:56,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:14:56,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 50 [2024-06-04 16:14:56,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:14:57,093 INFO L124 PetriNetUnfolderBase]: 4484/6959 cut-off events. [2024-06-04 16:14:57,093 INFO L125 PetriNetUnfolderBase]: For 42622/42940 co-relation queries the response was YES. [2024-06-04 16:14:57,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30874 conditions, 6959 events. 4484/6959 cut-off events. For 42622/42940 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 43192 event pairs, 1425 based on Foata normal form. 52/6941 useless extension candidates. Maximal degree in co-relation 30832. Up to 5675 conditions per place. [2024-06-04 16:14:57,148 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 104 selfloop transitions, 32 changer transitions 0/150 dead transitions. [2024-06-04 16:14:57,148 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 150 transitions, 1456 flow [2024-06-04 16:14:57,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:14:57,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:14:57,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 190 transitions. [2024-06-04 16:14:57,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6333333333333333 [2024-06-04 16:14:57,150 INFO L175 Difference]: Start difference. First operand has 92 places, 108 transitions, 949 flow. Second operand 6 states and 190 transitions. [2024-06-04 16:14:57,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 150 transitions, 1456 flow [2024-06-04 16:14:57,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 150 transitions, 1452 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-04 16:14:57,224 INFO L231 Difference]: Finished difference. Result has 99 places, 113 transitions, 1119 flow [2024-06-04 16:14:57,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=945, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1119, PETRI_PLACES=99, PETRI_TRANSITIONS=113} [2024-06-04 16:14:57,224 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 46 predicate places. [2024-06-04 16:14:57,224 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 113 transitions, 1119 flow [2024-06-04 16:14:57,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.5) internal successors, (123), 6 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:57,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:14:57,225 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:14:57,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-04 16:14:57,225 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 16:14:57,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:14:57,226 INFO L85 PathProgramCache]: Analyzing trace with hash -580714421, now seen corresponding path program 2 times [2024-06-04 16:14:57,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:14:57,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029635175] [2024-06-04 16:14:57,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:14:57,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:14:57,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:14:57,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:14:57,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:14:57,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029635175] [2024-06-04 16:14:57,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029635175] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:14:57,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:14:57,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:14:57,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009712349] [2024-06-04 16:14:57,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:14:57,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:14:57,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:14:57,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:14:57,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:14:57,608 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 50 [2024-06-04 16:14:57,608 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 113 transitions, 1119 flow. Second operand has 6 states, 6 states have (on average 20.5) internal successors, (123), 6 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:57,608 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:14:57,609 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 50 [2024-06-04 16:14:57,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:14:58,402 INFO L124 PetriNetUnfolderBase]: 4412/6869 cut-off events. [2024-06-04 16:14:58,403 INFO L125 PetriNetUnfolderBase]: For 48146/48464 co-relation queries the response was YES. [2024-06-04 16:14:58,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31285 conditions, 6869 events. 4412/6869 cut-off events. For 48146/48464 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 42869 event pairs, 1542 based on Foata normal form. 60/6859 useless extension candidates. Maximal degree in co-relation 31239. Up to 6043 conditions per place. [2024-06-04 16:14:58,444 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 102 selfloop transitions, 26 changer transitions 0/142 dead transitions. [2024-06-04 16:14:58,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 142 transitions, 1459 flow [2024-06-04 16:14:58,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:14:58,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:14:58,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 183 transitions. [2024-06-04 16:14:58,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.61 [2024-06-04 16:14:58,446 INFO L175 Difference]: Start difference. First operand has 99 places, 113 transitions, 1119 flow. Second operand 6 states and 183 transitions. [2024-06-04 16:14:58,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 142 transitions, 1459 flow [2024-06-04 16:14:58,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 142 transitions, 1377 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-04 16:14:58,559 INFO L231 Difference]: Finished difference. Result has 102 places, 113 transitions, 1097 flow [2024-06-04 16:14:58,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1037, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1097, PETRI_PLACES=102, PETRI_TRANSITIONS=113} [2024-06-04 16:14:58,560 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 49 predicate places. [2024-06-04 16:14:58,560 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 113 transitions, 1097 flow [2024-06-04 16:14:58,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.5) internal successors, (123), 6 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:58,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:14:58,561 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:14:58,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-04 16:14:58,561 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 16:14:58,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:14:58,562 INFO L85 PathProgramCache]: Analyzing trace with hash -304391433, now seen corresponding path program 1 times [2024-06-04 16:14:58,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:14:58,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533667163] [2024-06-04 16:14:58,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:14:58,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:14:58,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:14:59,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:14:59,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:14:59,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533667163] [2024-06-04 16:14:59,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533667163] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:14:59,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:14:59,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:14:59,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571907175] [2024-06-04 16:14:59,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:14:59,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:14:59,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:14:59,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:14:59,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:14:59,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-04 16:14:59,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 113 transitions, 1097 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) [2024-06-04 16:14:59,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:14:59,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-04 16:14:59,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:14:59,786 INFO L124 PetriNetUnfolderBase]: 5417/8126 cut-off events. [2024-06-04 16:14:59,786 INFO L125 PetriNetUnfolderBase]: For 53881/54166 co-relation queries the response was YES. [2024-06-04 16:14:59,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36571 conditions, 8126 events. 5417/8126 cut-off events. For 53881/54166 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 49172 event pairs, 1736 based on Foata normal form. 36/8063 useless extension candidates. Maximal degree in co-relation 36524. Up to 7342 conditions per place. [2024-06-04 16:14:59,846 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 89 selfloop transitions, 41 changer transitions 0/141 dead transitions. [2024-06-04 16:14:59,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 141 transitions, 1469 flow [2024-06-04 16:14:59,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:14:59,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:14:59,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 157 transitions. [2024-06-04 16:14:59,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.628 [2024-06-04 16:14:59,848 INFO L175 Difference]: Start difference. First operand has 102 places, 113 transitions, 1097 flow. Second operand 5 states and 157 transitions. [2024-06-04 16:14:59,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 141 transitions, 1469 flow [2024-06-04 16:14:59,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 141 transitions, 1413 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-04 16:14:59,935 INFO L231 Difference]: Finished difference. Result has 103 places, 117 transitions, 1191 flow [2024-06-04 16:14:59,935 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1041, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1191, PETRI_PLACES=103, PETRI_TRANSITIONS=117} [2024-06-04 16:14:59,935 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 50 predicate places. [2024-06-04 16:14:59,936 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 117 transitions, 1191 flow [2024-06-04 16:14:59,936 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) [2024-06-04 16:14:59,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:14:59,936 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:14:59,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-04 16:14:59,936 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 16:14:59,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:14:59,937 INFO L85 PathProgramCache]: Analyzing trace with hash -189100263, now seen corresponding path program 2 times [2024-06-04 16:14:59,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:14:59,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139189075] [2024-06-04 16:14:59,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:14:59,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:14:59,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:00,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:00,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:00,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139189075] [2024-06-04 16:15:00,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139189075] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:00,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:00,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:15:00,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435094572] [2024-06-04 16:15:00,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:00,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:15:00,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:00,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:15:00,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:15:00,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-04 16:15:00,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 117 transitions, 1191 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) [2024-06-04 16:15:00,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:00,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-04 16:15:00,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:01,005 INFO L124 PetriNetUnfolderBase]: 5484/8231 cut-off events. [2024-06-04 16:15:01,005 INFO L125 PetriNetUnfolderBase]: For 62575/62990 co-relation queries the response was YES. [2024-06-04 16:15:01,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38995 conditions, 8231 events. 5484/8231 cut-off events. For 62575/62990 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 49827 event pairs, 1740 based on Foata normal form. 66/8200 useless extension candidates. Maximal degree in co-relation 38947. Up to 7386 conditions per place. [2024-06-04 16:15:01,065 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 95 selfloop transitions, 51 changer transitions 0/157 dead transitions. [2024-06-04 16:15:01,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 157 transitions, 1729 flow [2024-06-04 16:15:01,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:15:01,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:15:01,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 186 transitions. [2024-06-04 16:15:01,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.62 [2024-06-04 16:15:01,067 INFO L175 Difference]: Start difference. First operand has 103 places, 117 transitions, 1191 flow. Second operand 6 states and 186 transitions. [2024-06-04 16:15:01,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 157 transitions, 1729 flow [2024-06-04 16:15:01,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 157 transitions, 1627 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-04 16:15:01,172 INFO L231 Difference]: Finished difference. Result has 106 places, 125 transitions, 1316 flow [2024-06-04 16:15:01,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1089, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1316, PETRI_PLACES=106, PETRI_TRANSITIONS=125} [2024-06-04 16:15:01,173 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 53 predicate places. [2024-06-04 16:15:01,173 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 125 transitions, 1316 flow [2024-06-04 16:15:01,173 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) [2024-06-04 16:15:01,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:01,173 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:01,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-04 16:15:01,173 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 16:15:01,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:01,174 INFO L85 PathProgramCache]: Analyzing trace with hash -188831493, now seen corresponding path program 3 times [2024-06-04 16:15:01,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:01,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992720934] [2024-06-04 16:15:01,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:01,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:01,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:01,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:01,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:01,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992720934] [2024-06-04 16:15:01,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992720934] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:01,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:01,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:15:01,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678905990] [2024-06-04 16:15:01,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:01,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:15:01,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:01,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:15:01,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:15:01,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-04 16:15:01,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 125 transitions, 1316 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) [2024-06-04 16:15:01,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:01,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-04 16:15:01,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:02,280 INFO L124 PetriNetUnfolderBase]: 5500/8257 cut-off events. [2024-06-04 16:15:02,281 INFO L125 PetriNetUnfolderBase]: For 73048/73470 co-relation queries the response was YES. [2024-06-04 16:15:02,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41106 conditions, 8257 events. 5500/8257 cut-off events. For 73048/73470 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 50089 event pairs, 1740 based on Foata normal form. 79/8239 useless extension candidates. Maximal degree in co-relation 41057. Up to 7403 conditions per place. [2024-06-04 16:15:02,330 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 93 selfloop transitions, 55 changer transitions 0/159 dead transitions. [2024-06-04 16:15:02,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 159 transitions, 1812 flow [2024-06-04 16:15:02,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:15:02,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:15:02,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 184 transitions. [2024-06-04 16:15:02,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6133333333333333 [2024-06-04 16:15:02,332 INFO L175 Difference]: Start difference. First operand has 106 places, 125 transitions, 1316 flow. Second operand 6 states and 184 transitions. [2024-06-04 16:15:02,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 159 transitions, 1812 flow [2024-06-04 16:15:02,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 159 transitions, 1713 flow, removed 27 selfloop flow, removed 2 redundant places. [2024-06-04 16:15:02,446 INFO L231 Difference]: Finished difference. Result has 110 places, 129 transitions, 1398 flow [2024-06-04 16:15:02,446 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1221, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1398, PETRI_PLACES=110, PETRI_TRANSITIONS=129} [2024-06-04 16:15:02,446 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 57 predicate places. [2024-06-04 16:15:02,447 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 129 transitions, 1398 flow [2024-06-04 16:15:02,447 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) [2024-06-04 16:15:02,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:02,447 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:02,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-04 16:15:02,447 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 16:15:02,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:02,448 INFO L85 PathProgramCache]: Analyzing trace with hash 341305113, now seen corresponding path program 4 times [2024-06-04 16:15:02,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:02,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555791495] [2024-06-04 16:15:02,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:02,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:02,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:02,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:02,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:02,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555791495] [2024-06-04 16:15:02,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555791495] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:02,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:02,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:15:02,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176791605] [2024-06-04 16:15:02,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:02,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:15:02,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:02,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:15:02,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:15:02,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-04 16:15:02,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 129 transitions, 1398 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) [2024-06-04 16:15:02,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:02,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-04 16:15:02,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:03,503 INFO L124 PetriNetUnfolderBase]: 5458/8195 cut-off events. [2024-06-04 16:15:03,503 INFO L125 PetriNetUnfolderBase]: For 77086/77493 co-relation queries the response was YES. [2024-06-04 16:15:03,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41208 conditions, 8195 events. 5458/8195 cut-off events. For 77086/77493 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 49693 event pairs, 1736 based on Foata normal form. 26/8124 useless extension candidates. Maximal degree in co-relation 41157. Up to 7400 conditions per place. [2024-06-04 16:15:03,566 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 103 selfloop transitions, 41 changer transitions 0/155 dead transitions. [2024-06-04 16:15:03,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 155 transitions, 1756 flow [2024-06-04 16:15:03,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:15:03,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:15:03,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 159 transitions. [2024-06-04 16:15:03,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.636 [2024-06-04 16:15:03,568 INFO L175 Difference]: Start difference. First operand has 110 places, 129 transitions, 1398 flow. Second operand 5 states and 159 transitions. [2024-06-04 16:15:03,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 155 transitions, 1756 flow [2024-06-04 16:15:03,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 155 transitions, 1601 flow, removed 39 selfloop flow, removed 3 redundant places. [2024-06-04 16:15:03,722 INFO L231 Difference]: Finished difference. Result has 112 places, 129 transitions, 1339 flow [2024-06-04 16:15:03,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1243, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1339, PETRI_PLACES=112, PETRI_TRANSITIONS=129} [2024-06-04 16:15:03,722 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 59 predicate places. [2024-06-04 16:15:03,723 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 129 transitions, 1339 flow [2024-06-04 16:15:03,723 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) [2024-06-04 16:15:03,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:03,723 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:03,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-04 16:15:03,723 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 16:15:03,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:03,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1171899383, now seen corresponding path program 1 times [2024-06-04 16:15:03,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:03,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915099276] [2024-06-04 16:15:03,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:03,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:03,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:04,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:04,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:04,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915099276] [2024-06-04 16:15:04,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915099276] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:04,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:04,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-04 16:15:04,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816064981] [2024-06-04 16:15:04,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:04,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-04 16:15:04,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:04,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-04 16:15:04,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-04 16:15:04,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 50 [2024-06-04 16:15:04,056 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 129 transitions, 1339 flow. Second operand has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:04,056 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:04,056 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 50 [2024-06-04 16:15:04,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:04,766 INFO L124 PetriNetUnfolderBase]: 5402/8121 cut-off events. [2024-06-04 16:15:04,767 INFO L125 PetriNetUnfolderBase]: For 87867/87990 co-relation queries the response was YES. [2024-06-04 16:15:04,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39952 conditions, 8121 events. 5402/8121 cut-off events. For 87867/87990 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 49638 event pairs, 1832 based on Foata normal form. 19/7959 useless extension candidates. Maximal degree in co-relation 39900. Up to 7236 conditions per place. [2024-06-04 16:15:04,832 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 89 selfloop transitions, 27 changer transitions 0/148 dead transitions. [2024-06-04 16:15:04,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 148 transitions, 1651 flow [2024-06-04 16:15:04,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-04 16:15:04,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-04 16:15:04,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 124 transitions. [2024-06-04 16:15:04,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.62 [2024-06-04 16:15:04,834 INFO L175 Difference]: Start difference. First operand has 112 places, 129 transitions, 1339 flow. Second operand 4 states and 124 transitions. [2024-06-04 16:15:04,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 148 transitions, 1651 flow [2024-06-04 16:15:04,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 148 transitions, 1536 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-04 16:15:04,974 INFO L231 Difference]: Finished difference. Result has 111 places, 135 transitions, 1352 flow [2024-06-04 16:15:04,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1224, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1352, PETRI_PLACES=111, PETRI_TRANSITIONS=135} [2024-06-04 16:15:04,975 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 58 predicate places. [2024-06-04 16:15:04,975 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 135 transitions, 1352 flow [2024-06-04 16:15:04,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:04,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:04,975 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:04,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-04 16:15:04,975 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 16:15:04,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:04,976 INFO L85 PathProgramCache]: Analyzing trace with hash -2138120553, now seen corresponding path program 2 times [2024-06-04 16:15:04,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:04,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441917177] [2024-06-04 16:15:04,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:04,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:04,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:05,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:05,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:05,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441917177] [2024-06-04 16:15:05,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441917177] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:05,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:05,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:15:05,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842734664] [2024-06-04 16:15:05,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:05,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:15:05,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:05,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:15:05,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:15:05,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 50 [2024-06-04 16:15:05,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 135 transitions, 1352 flow. Second operand has 7 states, 7 states have (on average 20.428571428571427) internal successors, (143), 7 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:05,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:05,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 50 [2024-06-04 16:15:05,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:06,122 INFO L124 PetriNetUnfolderBase]: 5385/8157 cut-off events. [2024-06-04 16:15:06,123 INFO L125 PetriNetUnfolderBase]: For 94297/94415 co-relation queries the response was YES. [2024-06-04 16:15:06,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42233 conditions, 8157 events. 5385/8157 cut-off events. For 94297/94415 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 50339 event pairs, 1810 based on Foata normal form. 24/8017 useless extension candidates. Maximal degree in co-relation 42180. Up to 7255 conditions per place. [2024-06-04 16:15:06,188 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 109 selfloop transitions, 30 changer transitions 0/171 dead transitions. [2024-06-04 16:15:06,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 171 transitions, 1833 flow [2024-06-04 16:15:06,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:15:06,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:15:06,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 198 transitions. [2024-06-04 16:15:06,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5657142857142857 [2024-06-04 16:15:06,190 INFO L175 Difference]: Start difference. First operand has 111 places, 135 transitions, 1352 flow. Second operand 7 states and 198 transitions. [2024-06-04 16:15:06,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 171 transitions, 1833 flow [2024-06-04 16:15:06,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 171 transitions, 1742 flow, removed 21 selfloop flow, removed 2 redundant places. [2024-06-04 16:15:06,345 INFO L231 Difference]: Finished difference. Result has 118 places, 148 transitions, 1517 flow [2024-06-04 16:15:06,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1288, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1517, PETRI_PLACES=118, PETRI_TRANSITIONS=148} [2024-06-04 16:15:06,345 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 65 predicate places. [2024-06-04 16:15:06,345 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 148 transitions, 1517 flow [2024-06-04 16:15:06,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.428571428571427) internal successors, (143), 7 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:06,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:06,346 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:06,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-04 16:15:06,346 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 16:15:06,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:06,346 INFO L85 PathProgramCache]: Analyzing trace with hash -529124471, now seen corresponding path program 1 times [2024-06-04 16:15:06,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:06,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815260048] [2024-06-04 16:15:06,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:06,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:06,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:06,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:06,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:06,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815260048] [2024-06-04 16:15:06,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815260048] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:06,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:06,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-04 16:15:06,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043902599] [2024-06-04 16:15:06,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:06,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-04 16:15:06,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:06,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-04 16:15:06,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-04 16:15:06,648 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-04 16:15:06,648 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 148 transitions, 1517 flow. Second operand has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:06,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:06,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-04 16:15:06,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:07,705 INFO L124 PetriNetUnfolderBase]: 5943/8855 cut-off events. [2024-06-04 16:15:07,705 INFO L125 PetriNetUnfolderBase]: For 93149/93149 co-relation queries the response was YES. [2024-06-04 16:15:07,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46565 conditions, 8855 events. 5943/8855 cut-off events. For 93149/93149 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 52458 event pairs, 1941 based on Foata normal form. 1/8853 useless extension candidates. Maximal degree in co-relation 46509. Up to 8299 conditions per place. [2024-06-04 16:15:07,782 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 157 selfloop transitions, 19 changer transitions 0/184 dead transitions. [2024-06-04 16:15:07,782 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 184 transitions, 2148 flow [2024-06-04 16:15:07,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:15:07,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:15:07,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 144 transitions. [2024-06-04 16:15:07,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.576 [2024-06-04 16:15:07,784 INFO L175 Difference]: Start difference. First operand has 118 places, 148 transitions, 1517 flow. Second operand 5 states and 144 transitions. [2024-06-04 16:15:07,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 184 transitions, 2148 flow [2024-06-04 16:15:08,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 184 transitions, 2091 flow, removed 20 selfloop flow, removed 2 redundant places. [2024-06-04 16:15:08,035 INFO L231 Difference]: Finished difference. Result has 123 places, 165 transitions, 1741 flow [2024-06-04 16:15:08,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1464, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1741, PETRI_PLACES=123, PETRI_TRANSITIONS=165} [2024-06-04 16:15:08,036 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 70 predicate places. [2024-06-04 16:15:08,036 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 165 transitions, 1741 flow [2024-06-04 16:15:08,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:08,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:08,036 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:08,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-04 16:15:08,037 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 16:15:08,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:08,037 INFO L85 PathProgramCache]: Analyzing trace with hash 969411499, now seen corresponding path program 2 times [2024-06-04 16:15:08,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:08,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115821273] [2024-06-04 16:15:08,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:08,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:08,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:08,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:08,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:08,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115821273] [2024-06-04 16:15:08,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115821273] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:08,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:08,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-04 16:15:08,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331814616] [2024-06-04 16:15:08,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:08,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-04 16:15:08,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:08,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-04 16:15:08,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-04 16:15:08,419 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-04 16:15:08,419 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 165 transitions, 1741 flow. Second operand has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:08,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:08,420 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-04 16:15:08,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:09,470 INFO L124 PetriNetUnfolderBase]: 5939/8846 cut-off events. [2024-06-04 16:15:09,471 INFO L125 PetriNetUnfolderBase]: For 102968/102968 co-relation queries the response was YES. [2024-06-04 16:15:09,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48247 conditions, 8846 events. 5939/8846 cut-off events. For 102968/102968 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 52451 event pairs, 1947 based on Foata normal form. 1/8844 useless extension candidates. Maximal degree in co-relation 48187. Up to 8295 conditions per place. [2024-06-04 16:15:09,554 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 150 selfloop transitions, 20 changer transitions 0/178 dead transitions. [2024-06-04 16:15:09,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 178 transitions, 2120 flow [2024-06-04 16:15:09,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:15:09,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:15:09,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 137 transitions. [2024-06-04 16:15:09,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.548 [2024-06-04 16:15:09,556 INFO L175 Difference]: Start difference. First operand has 123 places, 165 transitions, 1741 flow. Second operand 5 states and 137 transitions. [2024-06-04 16:15:09,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 178 transitions, 2120 flow [2024-06-04 16:15:09,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 178 transitions, 2056 flow, removed 32 selfloop flow, removed 0 redundant places. [2024-06-04 16:15:09,888 INFO L231 Difference]: Finished difference. Result has 128 places, 166 transitions, 1733 flow [2024-06-04 16:15:09,889 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1681, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1733, PETRI_PLACES=128, PETRI_TRANSITIONS=166} [2024-06-04 16:15:09,889 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 75 predicate places. [2024-06-04 16:15:09,889 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 166 transitions, 1733 flow [2024-06-04 16:15:09,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:09,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:09,890 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:09,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-04 16:15:09,890 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 16:15:09,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:09,890 INFO L85 PathProgramCache]: Analyzing trace with hash 922056705, now seen corresponding path program 1 times [2024-06-04 16:15:09,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:09,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643657285] [2024-06-04 16:15:09,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:09,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:09,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:10,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:10,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:10,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643657285] [2024-06-04 16:15:10,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643657285] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:10,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:10,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-04 16:15:10,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805115823] [2024-06-04 16:15:10,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:10,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-04 16:15:10,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:10,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-04 16:15:10,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-04 16:15:10,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 50 [2024-06-04 16:15:10,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 166 transitions, 1733 flow. Second operand has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:10,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:10,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 50 [2024-06-04 16:15:10,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:11,080 INFO L124 PetriNetUnfolderBase]: 5419/8225 cut-off events. [2024-06-04 16:15:11,081 INFO L125 PetriNetUnfolderBase]: For 107735/107740 co-relation queries the response was YES. [2024-06-04 16:15:11,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44962 conditions, 8225 events. 5419/8225 cut-off events. For 107735/107740 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 50363 event pairs, 1875 based on Foata normal form. 9/8095 useless extension candidates. Maximal degree in co-relation 44899. Up to 7271 conditions per place. [2024-06-04 16:15:11,160 INFO L140 encePairwiseOnDemand]: 43/50 looper letters, 127 selfloop transitions, 18 changer transitions 0/182 dead transitions. [2024-06-04 16:15:11,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 182 transitions, 2081 flow [2024-06-04 16:15:11,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:15:11,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:15:11,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 143 transitions. [2024-06-04 16:15:11,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.572 [2024-06-04 16:15:11,162 INFO L175 Difference]: Start difference. First operand has 128 places, 166 transitions, 1733 flow. Second operand 5 states and 143 transitions. [2024-06-04 16:15:11,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 182 transitions, 2081 flow [2024-06-04 16:15:11,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 182 transitions, 2046 flow, removed 9 selfloop flow, removed 1 redundant places. [2024-06-04 16:15:11,442 INFO L231 Difference]: Finished difference. Result has 132 places, 169 transitions, 1773 flow [2024-06-04 16:15:11,442 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1698, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1773, PETRI_PLACES=132, PETRI_TRANSITIONS=169} [2024-06-04 16:15:11,443 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 79 predicate places. [2024-06-04 16:15:11,443 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 169 transitions, 1773 flow [2024-06-04 16:15:11,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:11,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:11,443 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:11,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-04 16:15:11,443 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 16:15:11,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:11,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1095477370, now seen corresponding path program 1 times [2024-06-04 16:15:11,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:11,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894711996] [2024-06-04 16:15:11,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:11,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:11,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:11,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:11,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:11,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894711996] [2024-06-04 16:15:11,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894711996] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:11,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:11,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:15:11,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278655944] [2024-06-04 16:15:11,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:11,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:15:11,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:11,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:15:11,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:15:11,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-04 16:15:11,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 169 transitions, 1773 flow. Second operand has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:11,844 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:11,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-04 16:15:11,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:12,684 INFO L124 PetriNetUnfolderBase]: 5639/8510 cut-off events. [2024-06-04 16:15:12,685 INFO L125 PetriNetUnfolderBase]: For 114538/114548 co-relation queries the response was YES. [2024-06-04 16:15:12,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47637 conditions, 8510 events. 5639/8510 cut-off events. For 114538/114548 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 51340 event pairs, 1938 based on Foata normal form. 11/8467 useless extension candidates. Maximal degree in co-relation 47572. Up to 7745 conditions per place. [2024-06-04 16:15:12,761 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 146 selfloop transitions, 26 changer transitions 0/192 dead transitions. [2024-06-04 16:15:12,762 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 192 transitions, 2268 flow [2024-06-04 16:15:12,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:15:12,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:15:12,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 143 transitions. [2024-06-04 16:15:12,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.572 [2024-06-04 16:15:12,763 INFO L175 Difference]: Start difference. First operand has 132 places, 169 transitions, 1773 flow. Second operand 5 states and 143 transitions. [2024-06-04 16:15:12,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 192 transitions, 2268 flow [2024-06-04 16:15:13,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 192 transitions, 2219 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-04 16:15:13,103 INFO L231 Difference]: Finished difference. Result has 136 places, 180 transitions, 1949 flow [2024-06-04 16:15:13,103 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1724, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1949, PETRI_PLACES=136, PETRI_TRANSITIONS=180} [2024-06-04 16:15:13,103 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 83 predicate places. [2024-06-04 16:15:13,104 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 180 transitions, 1949 flow [2024-06-04 16:15:13,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:13,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:13,104 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:13,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-04 16:15:13,104 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 16:15:13,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:13,105 INFO L85 PathProgramCache]: Analyzing trace with hash 1873269912, now seen corresponding path program 1 times [2024-06-04 16:15:13,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:13,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143344006] [2024-06-04 16:15:13,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:13,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:13,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:13,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:13,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:13,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143344006] [2024-06-04 16:15:13,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143344006] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:13,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:13,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:15:13,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820502955] [2024-06-04 16:15:13,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:13,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:15:13,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:13,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:15:13,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:15:13,544 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-04 16:15:13,544 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 180 transitions, 1949 flow. Second operand has 9 states, 9 states have (on average 18.88888888888889) internal successors, (170), 9 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:13,544 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:13,544 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-04 16:15:13,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:14,699 INFO L124 PetriNetUnfolderBase]: 6498/9984 cut-off events. [2024-06-04 16:15:14,699 INFO L125 PetriNetUnfolderBase]: For 173619/174242 co-relation queries the response was YES. [2024-06-04 16:15:14,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60165 conditions, 9984 events. 6498/9984 cut-off events. For 173619/174242 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 64470 event pairs, 1268 based on Foata normal form. 152/9951 useless extension candidates. Maximal degree in co-relation 60097. Up to 5151 conditions per place. [2024-06-04 16:15:14,799 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 159 selfloop transitions, 70 changer transitions 0/244 dead transitions. [2024-06-04 16:15:14,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 244 transitions, 2927 flow [2024-06-04 16:15:14,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:15:14,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:15:14,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 230 transitions. [2024-06-04 16:15:14,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6571428571428571 [2024-06-04 16:15:14,801 INFO L175 Difference]: Start difference. First operand has 136 places, 180 transitions, 1949 flow. Second operand 7 states and 230 transitions. [2024-06-04 16:15:14,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 244 transitions, 2927 flow [2024-06-04 16:15:15,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 244 transitions, 2869 flow, removed 29 selfloop flow, removed 0 redundant places. [2024-06-04 16:15:15,272 INFO L231 Difference]: Finished difference. Result has 144 places, 185 transitions, 2173 flow [2024-06-04 16:15:15,272 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1891, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2173, PETRI_PLACES=144, PETRI_TRANSITIONS=185} [2024-06-04 16:15:15,273 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 91 predicate places. [2024-06-04 16:15:15,273 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 185 transitions, 2173 flow [2024-06-04 16:15:15,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.88888888888889) internal successors, (170), 9 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:15,273 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:15,273 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, 1] [2024-06-04 16:15:15,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-04 16:15:15,274 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 16:15:15,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:15,274 INFO L85 PathProgramCache]: Analyzing trace with hash -1103375876, now seen corresponding path program 2 times [2024-06-04 16:15:15,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:15,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620700213] [2024-06-04 16:15:15,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:15,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:15,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:15,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:15,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:15,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620700213] [2024-06-04 16:15:15,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620700213] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:15,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:15,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:15:15,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025546183] [2024-06-04 16:15:15,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:15,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:15:15,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:15,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:15:15,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:15:15,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-04 16:15:15,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 185 transitions, 2173 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:15,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:15,675 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-04 16:15:15,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:16,922 INFO L124 PetriNetUnfolderBase]: 6392/9853 cut-off events. [2024-06-04 16:15:16,922 INFO L125 PetriNetUnfolderBase]: For 177865/178409 co-relation queries the response was YES. [2024-06-04 16:15:16,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60729 conditions, 9853 events. 6392/9853 cut-off events. For 177865/178409 co-relation queries the response was YES. Maximal size of possible extension queue 533. Compared 63452 event pairs, 1601 based on Foata normal form. 51/9715 useless extension candidates. Maximal degree in co-relation 60657. Up to 8191 conditions per place. [2024-06-04 16:15:17,003 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 175 selfloop transitions, 33 changer transitions 0/223 dead transitions. [2024-06-04 16:15:17,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 223 transitions, 2757 flow [2024-06-04 16:15:17,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:15:17,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:15:17,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 185 transitions. [2024-06-04 16:15:17,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6166666666666667 [2024-06-04 16:15:17,005 INFO L175 Difference]: Start difference. First operand has 144 places, 185 transitions, 2173 flow. Second operand 6 states and 185 transitions. [2024-06-04 16:15:17,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 223 transitions, 2757 flow [2024-06-04 16:15:17,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 223 transitions, 2677 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-04 16:15:17,481 INFO L231 Difference]: Finished difference. Result has 148 places, 185 transitions, 2165 flow [2024-06-04 16:15:17,481 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2093, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2165, PETRI_PLACES=148, PETRI_TRANSITIONS=185} [2024-06-04 16:15:17,481 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 95 predicate places. [2024-06-04 16:15:17,481 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 185 transitions, 2165 flow [2024-06-04 16:15:17,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:17,482 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:17,482 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:17,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-04 16:15:17,482 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 16:15:17,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:17,482 INFO L85 PathProgramCache]: Analyzing trace with hash 1220063222, now seen corresponding path program 3 times [2024-06-04 16:15:17,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:17,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647698859] [2024-06-04 16:15:17,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:17,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:17,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:17,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:17,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:17,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647698859] [2024-06-04 16:15:17,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647698859] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:17,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:17,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:15:17,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116703662] [2024-06-04 16:15:17,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:17,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:15:17,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:17,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:15:17,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:15:17,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-04 16:15:17,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 185 transitions, 2165 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:17,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:17,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-04 16:15:17,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:19,067 INFO L124 PetriNetUnfolderBase]: 6695/10254 cut-off events. [2024-06-04 16:15:19,067 INFO L125 PetriNetUnfolderBase]: For 200845/201427 co-relation queries the response was YES. [2024-06-04 16:15:19,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63751 conditions, 10254 events. 6695/10254 cut-off events. For 200845/201427 co-relation queries the response was YES. Maximal size of possible extension queue 576. Compared 66412 event pairs, 1958 based on Foata normal form. 151/10187 useless extension candidates. Maximal degree in co-relation 63677. Up to 6708 conditions per place. [2024-06-04 16:15:19,191 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 153 selfloop transitions, 63 changer transitions 0/231 dead transitions. [2024-06-04 16:15:19,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 231 transitions, 2926 flow [2024-06-04 16:15:19,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:15:19,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:15:19,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 196 transitions. [2024-06-04 16:15:19,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6533333333333333 [2024-06-04 16:15:19,194 INFO L175 Difference]: Start difference. First operand has 148 places, 185 transitions, 2165 flow. Second operand 6 states and 196 transitions. [2024-06-04 16:15:19,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 231 transitions, 2926 flow [2024-06-04 16:15:19,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 231 transitions, 2852 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-04 16:15:19,723 INFO L231 Difference]: Finished difference. Result has 150 places, 186 transitions, 2255 flow [2024-06-04 16:15:19,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2091, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2255, PETRI_PLACES=150, PETRI_TRANSITIONS=186} [2024-06-04 16:15:19,723 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 97 predicate places. [2024-06-04 16:15:19,724 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 186 transitions, 2255 flow [2024-06-04 16:15:19,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:19,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:19,724 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:19,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-04 16:15:19,724 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 16:15:19,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:19,725 INFO L85 PathProgramCache]: Analyzing trace with hash 1645019644, now seen corresponding path program 4 times [2024-06-04 16:15:19,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:19,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570444572] [2024-06-04 16:15:19,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:19,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:19,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:20,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:20,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:20,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570444572] [2024-06-04 16:15:20,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570444572] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:20,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:20,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:15:20,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147466734] [2024-06-04 16:15:20,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:20,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:15:20,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:20,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:15:20,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:15:20,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-04 16:15:20,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 186 transitions, 2255 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:20,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:20,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-04 16:15:20,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:21,386 INFO L124 PetriNetUnfolderBase]: 6500/10003 cut-off events. [2024-06-04 16:15:21,386 INFO L125 PetriNetUnfolderBase]: For 197734/198279 co-relation queries the response was YES. [2024-06-04 16:15:21,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61577 conditions, 10003 events. 6500/10003 cut-off events. For 197734/198279 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 64850 event pairs, 2177 based on Foata normal form. 154/9949 useless extension candidates. Maximal degree in co-relation 61502. Up to 8180 conditions per place. [2024-06-04 16:15:21,489 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 150 selfloop transitions, 55 changer transitions 0/220 dead transitions. [2024-06-04 16:15:21,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 220 transitions, 2817 flow [2024-06-04 16:15:21,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:15:21,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:15:21,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 187 transitions. [2024-06-04 16:15:21,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6233333333333333 [2024-06-04 16:15:21,491 INFO L175 Difference]: Start difference. First operand has 150 places, 186 transitions, 2255 flow. Second operand 6 states and 187 transitions. [2024-06-04 16:15:21,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 220 transitions, 2817 flow [2024-06-04 16:15:22,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 220 transitions, 2661 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-04 16:15:22,088 INFO L231 Difference]: Finished difference. Result has 151 places, 186 transitions, 2221 flow [2024-06-04 16:15:22,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2099, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2221, PETRI_PLACES=151, PETRI_TRANSITIONS=186} [2024-06-04 16:15:22,093 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 98 predicate places. [2024-06-04 16:15:22,093 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 186 transitions, 2221 flow [2024-06-04 16:15:22,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:22,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:22,094 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:22,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-04 16:15:22,094 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 16:15:22,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:22,094 INFO L85 PathProgramCache]: Analyzing trace with hash -1344305576, now seen corresponding path program 5 times [2024-06-04 16:15:22,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:22,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383147379] [2024-06-04 16:15:22,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:22,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:22,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:22,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:22,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:22,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383147379] [2024-06-04 16:15:22,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383147379] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:22,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:22,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:15:22,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840609834] [2024-06-04 16:15:22,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:22,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:15:22,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:22,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:15:22,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:15:22,508 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-04 16:15:22,508 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 186 transitions, 2221 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:22,508 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:22,508 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-04 16:15:22,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:23,961 INFO L124 PetriNetUnfolderBase]: 7249/11152 cut-off events. [2024-06-04 16:15:23,961 INFO L125 PetriNetUnfolderBase]: For 219342/219958 co-relation queries the response was YES. [2024-06-04 16:15:24,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68574 conditions, 11152 events. 7249/11152 cut-off events. For 219342/219958 co-relation queries the response was YES. Maximal size of possible extension queue 648. Compared 74155 event pairs, 2372 based on Foata normal form. 186/11121 useless extension candidates. Maximal degree in co-relation 68499. Up to 8680 conditions per place. [2024-06-04 16:15:24,061 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 155 selfloop transitions, 68 changer transitions 0/238 dead transitions. [2024-06-04 16:15:24,062 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 238 transitions, 3021 flow [2024-06-04 16:15:24,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:15:24,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:15:24,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 221 transitions. [2024-06-04 16:15:24,063 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6314285714285715 [2024-06-04 16:15:24,063 INFO L175 Difference]: Start difference. First operand has 151 places, 186 transitions, 2221 flow. Second operand 7 states and 221 transitions. [2024-06-04 16:15:24,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 238 transitions, 3021 flow [2024-06-04 16:15:24,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 238 transitions, 2878 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-04 16:15:24,550 INFO L231 Difference]: Finished difference. Result has 152 places, 188 transitions, 2282 flow [2024-06-04 16:15:24,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2082, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2282, PETRI_PLACES=152, PETRI_TRANSITIONS=188} [2024-06-04 16:15:24,552 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 99 predicate places. [2024-06-04 16:15:24,552 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 188 transitions, 2282 flow [2024-06-04 16:15:24,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:24,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:24,553 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:24,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-04 16:15:24,553 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 16:15:24,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:24,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1336687016, now seen corresponding path program 6 times [2024-06-04 16:15:24,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:24,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932814970] [2024-06-04 16:15:24,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:24,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:24,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:24,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:24,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:24,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932814970] [2024-06-04 16:15:24,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932814970] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:24,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:24,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:15:24,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598558774] [2024-06-04 16:15:24,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:24,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:15:24,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:24,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:15:24,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:15:24,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-04 16:15:24,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 188 transitions, 2282 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:24,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:24,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-04 16:15:24,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:26,335 INFO L124 PetriNetUnfolderBase]: 7642/11729 cut-off events. [2024-06-04 16:15:26,335 INFO L125 PetriNetUnfolderBase]: For 231841/232436 co-relation queries the response was YES. [2024-06-04 16:15:26,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72147 conditions, 11729 events. 7642/11729 cut-off events. For 231841/232436 co-relation queries the response was YES. Maximal size of possible extension queue 696. Compared 78654 event pairs, 2604 based on Foata normal form. 142/11634 useless extension candidates. Maximal degree in co-relation 72072. Up to 10002 conditions per place. [2024-06-04 16:15:26,458 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 147 selfloop transitions, 66 changer transitions 0/228 dead transitions. [2024-06-04 16:15:26,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 228 transitions, 2884 flow [2024-06-04 16:15:26,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:15:26,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:15:26,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 212 transitions. [2024-06-04 16:15:26,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6057142857142858 [2024-06-04 16:15:26,460 INFO L175 Difference]: Start difference. First operand has 152 places, 188 transitions, 2282 flow. Second operand 7 states and 212 transitions. [2024-06-04 16:15:26,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 228 transitions, 2884 flow [2024-06-04 16:15:27,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 228 transitions, 2782 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-04 16:15:27,069 INFO L231 Difference]: Finished difference. Result has 156 places, 189 transitions, 2352 flow [2024-06-04 16:15:27,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2186, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2352, PETRI_PLACES=156, PETRI_TRANSITIONS=189} [2024-06-04 16:15:27,070 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 103 predicate places. [2024-06-04 16:15:27,070 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 189 transitions, 2352 flow [2024-06-04 16:15:27,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:27,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:27,070 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:27,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-04 16:15:27,070 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 16:15:27,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:27,071 INFO L85 PathProgramCache]: Analyzing trace with hash -1078399046, now seen corresponding path program 7 times [2024-06-04 16:15:27,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:27,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115558030] [2024-06-04 16:15:27,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:27,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:27,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:27,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:27,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:27,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115558030] [2024-06-04 16:15:27,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115558030] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:27,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:27,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:15:27,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284869783] [2024-06-04 16:15:27,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:27,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:15:27,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:27,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:15:27,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:15:27,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-04 16:15:27,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 189 transitions, 2352 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:27,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:27,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-04 16:15:27,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:28,834 INFO L124 PetriNetUnfolderBase]: 7925/12154 cut-off events. [2024-06-04 16:15:28,834 INFO L125 PetriNetUnfolderBase]: For 240016/240587 co-relation queries the response was YES. [2024-06-04 16:15:28,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74455 conditions, 12154 events. 7925/12154 cut-off events. For 240016/240587 co-relation queries the response was YES. Maximal size of possible extension queue 729. Compared 82008 event pairs, 2704 based on Foata normal form. 142/12069 useless extension candidates. Maximal degree in co-relation 74378. Up to 10435 conditions per place. [2024-06-04 16:15:28,975 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 145 selfloop transitions, 67 changer transitions 0/227 dead transitions. [2024-06-04 16:15:28,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 227 transitions, 2952 flow [2024-06-04 16:15:28,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:15:28,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:15:28,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 210 transitions. [2024-06-04 16:15:28,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-04 16:15:28,977 INFO L175 Difference]: Start difference. First operand has 156 places, 189 transitions, 2352 flow. Second operand 7 states and 210 transitions. [2024-06-04 16:15:28,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 227 transitions, 2952 flow [2024-06-04 16:15:29,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 227 transitions, 2816 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-04 16:15:29,650 INFO L231 Difference]: Finished difference. Result has 158 places, 190 transitions, 2386 flow [2024-06-04 16:15:29,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2216, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2386, PETRI_PLACES=158, PETRI_TRANSITIONS=190} [2024-06-04 16:15:29,651 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 105 predicate places. [2024-06-04 16:15:29,651 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 190 transitions, 2386 flow [2024-06-04 16:15:29,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:29,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:29,651 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] [2024-06-04 16:15:29,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-04 16:15:29,652 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 16:15:29,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:29,652 INFO L85 PathProgramCache]: Analyzing trace with hash 1576738392, now seen corresponding path program 8 times [2024-06-04 16:15:29,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:29,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561109832] [2024-06-04 16:15:29,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:29,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:29,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:29,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:29,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:29,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561109832] [2024-06-04 16:15:29,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561109832] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:29,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:29,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:15:29,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496296335] [2024-06-04 16:15:29,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:29,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:15:29,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:29,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:15:29,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:15:30,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-04 16:15:30,014 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 190 transitions, 2386 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:30,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:30,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-04 16:15:30,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:31,416 INFO L124 PetriNetUnfolderBase]: 7788/11909 cut-off events. [2024-06-04 16:15:31,416 INFO L125 PetriNetUnfolderBase]: For 234293/234865 co-relation queries the response was YES. [2024-06-04 16:15:31,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71946 conditions, 11909 events. 7788/11909 cut-off events. For 234293/234865 co-relation queries the response was YES. Maximal size of possible extension queue 715. Compared 79905 event pairs, 2571 based on Foata normal form. 78/11745 useless extension candidates. Maximal degree in co-relation 71868. Up to 10092 conditions per place. [2024-06-04 16:15:31,534 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 158 selfloop transitions, 55 changer transitions 0/228 dead transitions. [2024-06-04 16:15:31,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 228 transitions, 2956 flow [2024-06-04 16:15:31,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:15:31,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:15:31,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 191 transitions. [2024-06-04 16:15:31,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6366666666666667 [2024-06-04 16:15:31,536 INFO L175 Difference]: Start difference. First operand has 158 places, 190 transitions, 2386 flow. Second operand 6 states and 191 transitions. [2024-06-04 16:15:31,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 228 transitions, 2956 flow [2024-06-04 16:15:32,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 228 transitions, 2810 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-04 16:15:32,095 INFO L231 Difference]: Finished difference. Result has 159 places, 190 transitions, 2362 flow [2024-06-04 16:15:32,095 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2240, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2362, PETRI_PLACES=159, PETRI_TRANSITIONS=190} [2024-06-04 16:15:32,096 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 106 predicate places. [2024-06-04 16:15:32,096 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 190 transitions, 2362 flow [2024-06-04 16:15:32,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:32,096 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:32,096 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:32,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-04 16:15:32,097 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 16:15:32,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:32,097 INFO L85 PathProgramCache]: Analyzing trace with hash -1219620960, now seen corresponding path program 1 times [2024-06-04 16:15:32,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:32,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996160012] [2024-06-04 16:15:32,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:32,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:32,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:32,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:32,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:32,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996160012] [2024-06-04 16:15:32,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996160012] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:32,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:32,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:15:32,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864497211] [2024-06-04 16:15:32,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:32,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:15:32,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:32,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:15:32,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:15:32,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-04 16:15:32,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 190 transitions, 2362 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:32,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:32,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-04 16:15:32,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:34,066 INFO L124 PetriNetUnfolderBase]: 8279/12754 cut-off events. [2024-06-04 16:15:34,066 INFO L125 PetriNetUnfolderBase]: For 254500/255080 co-relation queries the response was YES. [2024-06-04 16:15:34,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77212 conditions, 12754 events. 8279/12754 cut-off events. For 254500/255080 co-relation queries the response was YES. Maximal size of possible extension queue 774. Compared 86982 event pairs, 2393 based on Foata normal form. 107/12608 useless extension candidates. Maximal degree in co-relation 77133. Up to 6224 conditions per place. [2024-06-04 16:15:34,185 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 151 selfloop transitions, 82 changer transitions 0/248 dead transitions. [2024-06-04 16:15:34,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 248 transitions, 3248 flow [2024-06-04 16:15:34,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:15:34,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:15:34,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 225 transitions. [2024-06-04 16:15:34,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2024-06-04 16:15:34,187 INFO L175 Difference]: Start difference. First operand has 159 places, 190 transitions, 2362 flow. Second operand 7 states and 225 transitions. [2024-06-04 16:15:34,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 248 transitions, 3248 flow [2024-06-04 16:15:34,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 248 transitions, 3126 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-04 16:15:34,846 INFO L231 Difference]: Finished difference. Result has 161 places, 192 transitions, 2472 flow [2024-06-04 16:15:34,846 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2240, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2472, PETRI_PLACES=161, PETRI_TRANSITIONS=192} [2024-06-04 16:15:34,846 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 108 predicate places. [2024-06-04 16:15:34,847 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 192 transitions, 2472 flow [2024-06-04 16:15:34,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:34,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:34,847 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:34,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-04 16:15:34,847 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 16:15:34,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:34,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1219352190, now seen corresponding path program 2 times [2024-06-04 16:15:34,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:34,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984513519] [2024-06-04 16:15:34,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:34,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:34,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:35,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:35,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:35,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984513519] [2024-06-04 16:15:35,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984513519] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:35,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:35,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:15:35,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185018189] [2024-06-04 16:15:35,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:35,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:15:35,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:35,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:15:35,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:15:35,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-04 16:15:35,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 192 transitions, 2472 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:35,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:35,207 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-04 16:15:35,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:36,756 INFO L124 PetriNetUnfolderBase]: 8448/13021 cut-off events. [2024-06-04 16:15:36,756 INFO L125 PetriNetUnfolderBase]: For 274194/274888 co-relation queries the response was YES. [2024-06-04 16:15:36,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79799 conditions, 13021 events. 8448/13021 cut-off events. For 274194/274888 co-relation queries the response was YES. Maximal size of possible extension queue 806. Compared 89347 event pairs, 2371 based on Foata normal form. 128/12878 useless extension candidates. Maximal degree in co-relation 79719. Up to 6246 conditions per place. [2024-06-04 16:15:37,127 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 149 selfloop transitions, 83 changer transitions 0/247 dead transitions. [2024-06-04 16:15:37,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 247 transitions, 3336 flow [2024-06-04 16:15:37,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:15:37,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:15:37,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 223 transitions. [2024-06-04 16:15:37,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6371428571428571 [2024-06-04 16:15:37,143 INFO L175 Difference]: Start difference. First operand has 161 places, 192 transitions, 2472 flow. Second operand 7 states and 223 transitions. [2024-06-04 16:15:37,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 247 transitions, 3336 flow [2024-06-04 16:15:37,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 247 transitions, 3144 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-04 16:15:37,939 INFO L231 Difference]: Finished difference. Result has 164 places, 193 transitions, 2484 flow [2024-06-04 16:15:37,939 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2288, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2484, PETRI_PLACES=164, PETRI_TRANSITIONS=193} [2024-06-04 16:15:37,940 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 111 predicate places. [2024-06-04 16:15:37,940 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 193 transitions, 2484 flow [2024-06-04 16:15:37,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:37,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:37,940 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:37,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-04 16:15:37,940 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 16:15:37,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:37,941 INFO L85 PathProgramCache]: Analyzing trace with hash -1078214596, now seen corresponding path program 3 times [2024-06-04 16:15:37,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:37,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228126928] [2024-06-04 16:15:37,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:37,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:37,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:38,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:38,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:38,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228126928] [2024-06-04 16:15:38,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228126928] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:38,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:38,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:15:38,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919107449] [2024-06-04 16:15:38,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:38,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:15:38,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:38,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:15:38,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:15:38,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-04 16:15:38,334 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 193 transitions, 2484 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:38,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:38,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-04 16:15:38,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:40,217 INFO L124 PetriNetUnfolderBase]: 8642/13457 cut-off events. [2024-06-04 16:15:40,218 INFO L125 PetriNetUnfolderBase]: For 288188/288690 co-relation queries the response was YES. [2024-06-04 16:15:40,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81813 conditions, 13457 events. 8642/13457 cut-off events. For 288188/288690 co-relation queries the response was YES. Maximal size of possible extension queue 823. Compared 94548 event pairs, 3008 based on Foata normal form. 119/13283 useless extension candidates. Maximal degree in co-relation 81732. Up to 10079 conditions per place. [2024-06-04 16:15:40,388 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 152 selfloop transitions, 71 changer transitions 0/238 dead transitions. [2024-06-04 16:15:40,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 238 transitions, 3170 flow [2024-06-04 16:15:40,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:15:40,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:15:40,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 215 transitions. [2024-06-04 16:15:40,397 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6142857142857143 [2024-06-04 16:15:40,397 INFO L175 Difference]: Start difference. First operand has 164 places, 193 transitions, 2484 flow. Second operand 7 states and 215 transitions. [2024-06-04 16:15:40,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 238 transitions, 3170 flow [2024-06-04 16:15:41,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 238 transitions, 3038 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-04 16:15:41,335 INFO L231 Difference]: Finished difference. Result has 167 places, 194 transitions, 2528 flow [2024-06-04 16:15:41,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2353, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2528, PETRI_PLACES=167, PETRI_TRANSITIONS=194} [2024-06-04 16:15:41,336 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 114 predicate places. [2024-06-04 16:15:41,336 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 194 transitions, 2528 flow [2024-06-04 16:15:41,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:41,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:41,337 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:41,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-04 16:15:41,337 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 16:15:41,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:41,339 INFO L85 PathProgramCache]: Analyzing trace with hash 1576922842, now seen corresponding path program 4 times [2024-06-04 16:15:41,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:41,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641491110] [2024-06-04 16:15:41,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:41,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:41,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:41,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:41,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:41,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641491110] [2024-06-04 16:15:41,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641491110] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:41,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:41,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:15:41,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43375664] [2024-06-04 16:15:41,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:41,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:15:41,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:41,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:15:41,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:15:41,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-04 16:15:41,732 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 194 transitions, 2528 flow. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:41,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:41,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-04 16:15:41,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:43,336 INFO L124 PetriNetUnfolderBase]: 8597/13254 cut-off events. [2024-06-04 16:15:43,337 INFO L125 PetriNetUnfolderBase]: For 282436/283108 co-relation queries the response was YES. [2024-06-04 16:15:43,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79554 conditions, 13254 events. 8597/13254 cut-off events. For 282436/283108 co-relation queries the response was YES. Maximal size of possible extension queue 827. Compared 91343 event pairs, 2427 based on Foata normal form. 89/13014 useless extension candidates. Maximal degree in co-relation 79472. Up to 9807 conditions per place. [2024-06-04 16:15:43,465 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 160 selfloop transitions, 64 changer transitions 0/239 dead transitions. [2024-06-04 16:15:43,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 239 transitions, 3184 flow [2024-06-04 16:15:43,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:15:43,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:15:43,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 196 transitions. [2024-06-04 16:15:43,467 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6533333333333333 [2024-06-04 16:15:43,467 INFO L175 Difference]: Start difference. First operand has 167 places, 194 transitions, 2528 flow. Second operand 6 states and 196 transitions. [2024-06-04 16:15:43,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 239 transitions, 3184 flow [2024-06-04 16:15:44,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 239 transitions, 3030 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-04 16:15:44,258 INFO L231 Difference]: Finished difference. Result has 168 places, 194 transitions, 2511 flow [2024-06-04 16:15:44,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2374, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2511, PETRI_PLACES=168, PETRI_TRANSITIONS=194} [2024-06-04 16:15:44,258 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 115 predicate places. [2024-06-04 16:15:44,258 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 194 transitions, 2511 flow [2024-06-04 16:15:44,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:44,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:44,259 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:44,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-04 16:15:44,259 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 16:15:44,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:44,259 INFO L85 PathProgramCache]: Analyzing trace with hash -924326040, now seen corresponding path program 1 times [2024-06-04 16:15:44,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:44,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636550569] [2024-06-04 16:15:44,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:44,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:44,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:44,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:44,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:44,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636550569] [2024-06-04 16:15:44,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636550569] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:44,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:44,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:15:44,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751658672] [2024-06-04 16:15:44,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:44,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:15:44,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:44,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:15:44,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:15:44,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-04 16:15:44,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 194 transitions, 2511 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) [2024-06-04 16:15:44,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:44,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-04 16:15:44,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:46,286 INFO L124 PetriNetUnfolderBase]: 9585/14478 cut-off events. [2024-06-04 16:15:46,287 INFO L125 PetriNetUnfolderBase]: For 256923/256930 co-relation queries the response was YES. [2024-06-04 16:15:46,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84172 conditions, 14478 events. 9585/14478 cut-off events. For 256923/256930 co-relation queries the response was YES. Maximal size of possible extension queue 810. Compared 96953 event pairs, 3627 based on Foata normal form. 7/14482 useless extension candidates. Maximal degree in co-relation 84089. Up to 13575 conditions per place. [2024-06-04 16:15:46,442 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 180 selfloop transitions, 39 changer transitions 0/227 dead transitions. [2024-06-04 16:15:46,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 227 transitions, 3223 flow [2024-06-04 16:15:46,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:15:46,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:15:46,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 189 transitions. [2024-06-04 16:15:46,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.54 [2024-06-04 16:15:46,443 INFO L175 Difference]: Start difference. First operand has 168 places, 194 transitions, 2511 flow. Second operand 7 states and 189 transitions. [2024-06-04 16:15:46,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 227 transitions, 3223 flow [2024-06-04 16:15:47,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 227 transitions, 3047 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-04 16:15:47,293 INFO L231 Difference]: Finished difference. Result has 170 places, 206 transitions, 2605 flow [2024-06-04 16:15:47,293 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2335, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2605, PETRI_PLACES=170, PETRI_TRANSITIONS=206} [2024-06-04 16:15:47,294 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 117 predicate places. [2024-06-04 16:15:47,294 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 206 transitions, 2605 flow [2024-06-04 16:15:47,294 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) [2024-06-04 16:15:47,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:47,294 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:47,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-04 16:15:47,294 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 16:15:47,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:47,295 INFO L85 PathProgramCache]: Analyzing trace with hash -913850520, now seen corresponding path program 2 times [2024-06-04 16:15:47,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:47,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108511441] [2024-06-04 16:15:47,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:47,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:47,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:47,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:47,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:47,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108511441] [2024-06-04 16:15:47,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108511441] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:47,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:47,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:15:47,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36248478] [2024-06-04 16:15:47,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:47,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:15:47,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:47,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:15:47,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:15:47,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-04 16:15:47,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 206 transitions, 2605 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) [2024-06-04 16:15:47,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:47,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-04 16:15:47,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:49,243 INFO L124 PetriNetUnfolderBase]: 9581/14453 cut-off events. [2024-06-04 16:15:49,243 INFO L125 PetriNetUnfolderBase]: For 264763/264780 co-relation queries the response was YES. [2024-06-04 16:15:49,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84940 conditions, 14453 events. 9581/14453 cut-off events. For 264763/264780 co-relation queries the response was YES. Maximal size of possible extension queue 808. Compared 96752 event pairs, 3556 based on Foata normal form. 17/14465 useless extension candidates. Maximal degree in co-relation 84855. Up to 13571 conditions per place. [2024-06-04 16:15:49,382 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 173 selfloop transitions, 37 changer transitions 0/218 dead transitions. [2024-06-04 16:15:49,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 218 transitions, 3055 flow [2024-06-04 16:15:49,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:15:49,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:15:49,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 140 transitions. [2024-06-04 16:15:49,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.56 [2024-06-04 16:15:49,383 INFO L175 Difference]: Start difference. First operand has 170 places, 206 transitions, 2605 flow. Second operand 5 states and 140 transitions. [2024-06-04 16:15:49,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 218 transitions, 3055 flow [2024-06-04 16:15:50,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 218 transitions, 2930 flow, removed 56 selfloop flow, removed 2 redundant places. [2024-06-04 16:15:50,174 INFO L231 Difference]: Finished difference. Result has 173 places, 206 transitions, 2566 flow [2024-06-04 16:15:50,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2480, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2566, PETRI_PLACES=173, PETRI_TRANSITIONS=206} [2024-06-04 16:15:50,175 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 120 predicate places. [2024-06-04 16:15:50,175 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 206 transitions, 2566 flow [2024-06-04 16:15:50,175 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) [2024-06-04 16:15:50,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:50,175 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:50,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-04 16:15:50,176 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 16:15:50,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:50,176 INFO L85 PathProgramCache]: Analyzing trace with hash 526855136, now seen corresponding path program 1 times [2024-06-04 16:15:50,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:50,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169703283] [2024-06-04 16:15:50,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:50,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:50,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:50,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:50,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:50,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169703283] [2024-06-04 16:15:50,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169703283] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:50,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:50,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:15:50,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863357719] [2024-06-04 16:15:50,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:50,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:15:50,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:50,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:15:50,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:15:50,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 50 [2024-06-04 16:15:50,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 206 transitions, 2566 flow. Second operand has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:50,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:50,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 50 [2024-06-04 16:15:50,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:52,119 INFO L124 PetriNetUnfolderBase]: 9249/13932 cut-off events. [2024-06-04 16:15:52,119 INFO L125 PetriNetUnfolderBase]: For 310762/310890 co-relation queries the response was YES. [2024-06-04 16:15:52,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83472 conditions, 13932 events. 9249/13932 cut-off events. For 310762/310890 co-relation queries the response was YES. Maximal size of possible extension queue 833. Compared 94052 event pairs, 3350 based on Foata normal form. 85/13554 useless extension candidates. Maximal degree in co-relation 83386. Up to 12410 conditions per place. [2024-06-04 16:15:52,287 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 132 selfloop transitions, 52 changer transitions 0/227 dead transitions. [2024-06-04 16:15:52,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 227 transitions, 3050 flow [2024-06-04 16:15:52,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:15:52,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:15:52,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 152 transitions. [2024-06-04 16:15:52,288 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.608 [2024-06-04 16:15:52,288 INFO L175 Difference]: Start difference. First operand has 173 places, 206 transitions, 2566 flow. Second operand 5 states and 152 transitions. [2024-06-04 16:15:52,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 227 transitions, 3050 flow [2024-06-04 16:15:52,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 227 transitions, 2969 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-04 16:15:53,002 INFO L231 Difference]: Finished difference. Result has 173 places, 209 transitions, 2649 flow [2024-06-04 16:15:53,002 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2485, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2649, PETRI_PLACES=173, PETRI_TRANSITIONS=209} [2024-06-04 16:15:53,003 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 120 predicate places. [2024-06-04 16:15:53,003 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 209 transitions, 2649 flow [2024-06-04 16:15:53,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:53,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:53,003 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:53,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-04 16:15:53,003 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 16:15:53,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:53,004 INFO L85 PathProgramCache]: Analyzing trace with hash 643523272, now seen corresponding path program 3 times [2024-06-04 16:15:53,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:53,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143895922] [2024-06-04 16:15:53,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:53,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:53,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:53,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:53,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:53,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143895922] [2024-06-04 16:15:53,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143895922] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:53,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:53,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:15:53,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006274401] [2024-06-04 16:15:53,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:53,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:15:53,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:53,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:15:53,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:15:53,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-04 16:15:53,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 209 transitions, 2649 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) [2024-06-04 16:15:53,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:53,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-04 16:15:53,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:55,051 INFO L124 PetriNetUnfolderBase]: 9916/14956 cut-off events. [2024-06-04 16:15:55,051 INFO L125 PetriNetUnfolderBase]: For 276140/276140 co-relation queries the response was YES. [2024-06-04 16:15:55,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89471 conditions, 14956 events. 9916/14956 cut-off events. For 276140/276140 co-relation queries the response was YES. Maximal size of possible extension queue 845. Compared 100554 event pairs, 3599 based on Foata normal form. 1/14954 useless extension candidates. Maximal degree in co-relation 89385. Up to 14020 conditions per place. [2024-06-04 16:15:55,234 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 200 selfloop transitions, 51 changer transitions 0/259 dead transitions. [2024-06-04 16:15:55,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 259 transitions, 3487 flow [2024-06-04 16:15:55,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:15:55,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:15:55,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 245 transitions. [2024-06-04 16:15:55,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5444444444444444 [2024-06-04 16:15:55,236 INFO L175 Difference]: Start difference. First operand has 173 places, 209 transitions, 2649 flow. Second operand 9 states and 245 transitions. [2024-06-04 16:15:55,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 259 transitions, 3487 flow [2024-06-04 16:15:56,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 259 transitions, 3379 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-04 16:15:56,149 INFO L231 Difference]: Finished difference. Result has 180 places, 221 transitions, 2851 flow [2024-06-04 16:15:56,150 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2543, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2851, PETRI_PLACES=180, PETRI_TRANSITIONS=221} [2024-06-04 16:15:56,150 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 127 predicate places. [2024-06-04 16:15:56,150 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 221 transitions, 2851 flow [2024-06-04 16:15:56,150 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) [2024-06-04 16:15:56,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:56,150 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:56,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-04 16:15:56,151 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 16:15:56,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:56,151 INFO L85 PathProgramCache]: Analyzing trace with hash 732497176, now seen corresponding path program 4 times [2024-06-04 16:15:56,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:56,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219532029] [2024-06-04 16:15:56,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:56,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:56,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:56,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:56,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:56,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219532029] [2024-06-04 16:15:56,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219532029] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:56,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:56,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:15:56,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051027656] [2024-06-04 16:15:56,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:56,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:15:56,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:56,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:15:56,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:15:56,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-04 16:15:56,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 221 transitions, 2851 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) [2024-06-04 16:15:56,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:56,512 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-04 16:15:56,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:58,458 INFO L124 PetriNetUnfolderBase]: 9923/14943 cut-off events. [2024-06-04 16:15:58,459 INFO L125 PetriNetUnfolderBase]: For 278961/278961 co-relation queries the response was YES. [2024-06-04 16:15:58,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89487 conditions, 14943 events. 9923/14943 cut-off events. For 278961/278961 co-relation queries the response was YES. Maximal size of possible extension queue 843. Compared 100073 event pairs, 3605 based on Foata normal form. 1/14941 useless extension candidates. Maximal degree in co-relation 89399. Up to 14028 conditions per place. [2024-06-04 16:15:58,615 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 188 selfloop transitions, 55 changer transitions 0/251 dead transitions. [2024-06-04 16:15:58,615 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 251 transitions, 3539 flow [2024-06-04 16:15:58,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:15:58,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:15:58,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 233 transitions. [2024-06-04 16:15:58,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5177777777777778 [2024-06-04 16:15:58,616 INFO L175 Difference]: Start difference. First operand has 180 places, 221 transitions, 2851 flow. Second operand 9 states and 233 transitions. [2024-06-04 16:15:58,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 251 transitions, 3539 flow [2024-06-04 16:15:59,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 251 transitions, 3386 flow, removed 60 selfloop flow, removed 4 redundant places. [2024-06-04 16:15:59,318 INFO L231 Difference]: Finished difference. Result has 185 places, 225 transitions, 2887 flow [2024-06-04 16:15:59,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2706, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2887, PETRI_PLACES=185, PETRI_TRANSITIONS=225} [2024-06-04 16:15:59,318 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 132 predicate places. [2024-06-04 16:15:59,318 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 225 transitions, 2887 flow [2024-06-04 16:15:59,319 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) [2024-06-04 16:15:59,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:59,319 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:59,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-04 16:15:59,319 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 16:15:59,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:59,319 INFO L85 PathProgramCache]: Analyzing trace with hash -211130456, now seen corresponding path program 5 times [2024-06-04 16:15:59,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:59,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931210288] [2024-06-04 16:15:59,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:59,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:59,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:59,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:59,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:59,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931210288] [2024-06-04 16:15:59,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931210288] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:59,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:59,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:15:59,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819471949] [2024-06-04 16:15:59,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:59,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:15:59,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:59,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:15:59,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:15:59,682 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-04 16:15:59,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 225 transitions, 2887 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) [2024-06-04 16:15:59,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:59,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-04 16:15:59,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:16:01,424 INFO L124 PetriNetUnfolderBase]: 9919/14934 cut-off events. [2024-06-04 16:16:01,425 INFO L125 PetriNetUnfolderBase]: For 278810/278810 co-relation queries the response was YES. [2024-06-04 16:16:01,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88141 conditions, 14934 events. 9919/14934 cut-off events. For 278810/278810 co-relation queries the response was YES. Maximal size of possible extension queue 843. Compared 100177 event pairs, 3601 based on Foata normal form. 1/14932 useless extension candidates. Maximal degree in co-relation 88052. Up to 14024 conditions per place. [2024-06-04 16:16:01,580 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 188 selfloop transitions, 53 changer transitions 0/249 dead transitions. [2024-06-04 16:16:01,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 249 transitions, 3429 flow [2024-06-04 16:16:01,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:16:01,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:16:01,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 212 transitions. [2024-06-04 16:16:01,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.53 [2024-06-04 16:16:01,588 INFO L175 Difference]: Start difference. First operand has 185 places, 225 transitions, 2887 flow. Second operand 8 states and 212 transitions. [2024-06-04 16:16:01,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 249 transitions, 3429 flow [2024-06-04 16:16:02,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 249 transitions, 3273 flow, removed 49 selfloop flow, removed 3 redundant places. [2024-06-04 16:16:02,592 INFO L231 Difference]: Finished difference. Result has 190 places, 225 transitions, 2844 flow [2024-06-04 16:16:02,595 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2731, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2844, PETRI_PLACES=190, PETRI_TRANSITIONS=225} [2024-06-04 16:16:02,595 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 137 predicate places. [2024-06-04 16:16:02,596 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 225 transitions, 2844 flow [2024-06-04 16:16:02,596 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) [2024-06-04 16:16:02,596 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:16:02,596 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:16:02,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-04 16:16:02,596 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 16:16:02,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:16:02,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1315155488, now seen corresponding path program 2 times [2024-06-04 16:16:02,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:16:02,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713111598] [2024-06-04 16:16:02,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:16:02,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:16:02,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:16:02,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:16:02,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:16:02,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713111598] [2024-06-04 16:16:02,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713111598] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:16:02,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:16:02,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:16:02,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369960120] [2024-06-04 16:16:02,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:16:02,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:16:02,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:16:02,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:16:02,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:16:02,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 50 [2024-06-04 16:16:02,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 225 transitions, 2844 flow. Second operand has 8 states, 8 states have (on average 20.25) internal successors, (162), 8 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) [2024-06-04 16:16:02,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:16:02,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 50 [2024-06-04 16:16:02,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:16:04,677 INFO L124 PetriNetUnfolderBase]: 9350/14115 cut-off events. [2024-06-04 16:16:04,677 INFO L125 PetriNetUnfolderBase]: For 311263/311366 co-relation queries the response was YES. [2024-06-04 16:16:04,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85127 conditions, 14115 events. 9350/14115 cut-off events. For 311263/311366 co-relation queries the response was YES. Maximal size of possible extension queue 843. Compared 95673 event pairs, 3345 based on Foata normal form. 39/13708 useless extension candidates. Maximal degree in co-relation 85036. Up to 12780 conditions per place. [2024-06-04 16:16:04,849 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 164 selfloop transitions, 40 changer transitions 0/255 dead transitions. [2024-06-04 16:16:04,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 255 transitions, 3368 flow [2024-06-04 16:16:04,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:16:04,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:16:04,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 223 transitions. [2024-06-04 16:16:04,851 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5575 [2024-06-04 16:16:04,851 INFO L175 Difference]: Start difference. First operand has 190 places, 225 transitions, 2844 flow. Second operand 8 states and 223 transitions. [2024-06-04 16:16:04,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 255 transitions, 3368 flow [2024-06-04 16:16:05,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 255 transitions, 3252 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-04 16:16:05,579 INFO L231 Difference]: Finished difference. Result has 193 places, 227 transitions, 2843 flow [2024-06-04 16:16:05,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2728, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2843, PETRI_PLACES=193, PETRI_TRANSITIONS=227} [2024-06-04 16:16:05,580 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 140 predicate places. [2024-06-04 16:16:05,580 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 227 transitions, 2843 flow [2024-06-04 16:16:05,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.25) internal successors, (162), 8 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) [2024-06-04 16:16:05,580 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:16:05,581 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:16:05,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-04 16:16:05,581 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 16:16:05,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:16:05,581 INFO L85 PathProgramCache]: Analyzing trace with hash -193023480, now seen corresponding path program 3 times [2024-06-04 16:16:05,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:16:05,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261398188] [2024-06-04 16:16:05,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:16:05,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:16:05,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:16:05,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:16:05,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:16:05,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261398188] [2024-06-04 16:16:05,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261398188] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:16:05,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:16:05,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:16:05,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535239534] [2024-06-04 16:16:05,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:16:05,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:16:05,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:16:05,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:16:05,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:16:06,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 50 [2024-06-04 16:16:06,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 227 transitions, 2843 flow. Second operand has 8 states, 8 states have (on average 20.25) internal successors, (162), 8 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) [2024-06-04 16:16:06,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:16:06,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 50 [2024-06-04 16:16:06,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:16:07,718 INFO L124 PetriNetUnfolderBase]: 9358/14161 cut-off events. [2024-06-04 16:16:07,718 INFO L125 PetriNetUnfolderBase]: For 318455/318574 co-relation queries the response was YES. [2024-06-04 16:16:07,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86157 conditions, 14161 events. 9358/14161 cut-off events. For 318455/318574 co-relation queries the response was YES. Maximal size of possible extension queue 850. Compared 96218 event pairs, 3327 based on Foata normal form. 41/13751 useless extension candidates. Maximal degree in co-relation 86066. Up to 12664 conditions per place. [2024-06-04 16:16:07,874 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 163 selfloop transitions, 47 changer transitions 0/261 dead transitions. [2024-06-04 16:16:07,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 261 transitions, 3417 flow [2024-06-04 16:16:07,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:16:07,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:16:07,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 225 transitions. [2024-06-04 16:16:07,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-06-04 16:16:07,876 INFO L175 Difference]: Start difference. First operand has 193 places, 227 transitions, 2843 flow. Second operand 8 states and 225 transitions. [2024-06-04 16:16:07,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 261 transitions, 3417 flow [2024-06-04 16:16:08,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 261 transitions, 3332 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-04 16:16:08,958 INFO L231 Difference]: Finished difference. Result has 196 places, 230 transitions, 2920 flow [2024-06-04 16:16:08,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2758, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2920, PETRI_PLACES=196, PETRI_TRANSITIONS=230} [2024-06-04 16:16:08,958 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 143 predicate places. [2024-06-04 16:16:08,958 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 230 transitions, 2920 flow [2024-06-04 16:16:08,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.25) internal successors, (162), 8 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) [2024-06-04 16:16:08,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:16:08,959 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:16:08,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-04 16:16:08,963 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 16:16:08,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:16:08,963 INFO L85 PathProgramCache]: Analyzing trace with hash 634960328, now seen corresponding path program 1 times [2024-06-04 16:16:08,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:16:08,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782204750] [2024-06-04 16:16:08,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:16:08,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:16:08,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:16:09,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:16:09,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:16:09,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782204750] [2024-06-04 16:16:09,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782204750] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:16:09,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:16:09,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:16:09,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006918137] [2024-06-04 16:16:09,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:16:09,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:16:09,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:16:09,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:16:09,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:16:09,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-04 16:16:09,306 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 230 transitions, 2920 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) [2024-06-04 16:16:09,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:16:09,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-04 16:16:09,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:16:11,093 INFO L124 PetriNetUnfolderBase]: 10126/15279 cut-off events. [2024-06-04 16:16:11,094 INFO L125 PetriNetUnfolderBase]: For 325421/325421 co-relation queries the response was YES. [2024-06-04 16:16:11,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92948 conditions, 15279 events. 10126/15279 cut-off events. For 325421/325421 co-relation queries the response was YES. Maximal size of possible extension queue 866. Compared 102995 event pairs, 3665 based on Foata normal form. 6/15282 useless extension candidates. Maximal degree in co-relation 92855. Up to 14266 conditions per place. [2024-06-04 16:16:11,282 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 236 selfloop transitions, 25 changer transitions 0/269 dead transitions. [2024-06-04 16:16:11,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 269 transitions, 3727 flow [2024-06-04 16:16:11,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:16:11,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:16:11,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 175 transitions. [2024-06-04 16:16:11,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-04 16:16:11,284 INFO L175 Difference]: Start difference. First operand has 196 places, 230 transitions, 2920 flow. Second operand 6 states and 175 transitions. [2024-06-04 16:16:11,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 269 transitions, 3727 flow [2024-06-04 16:16:12,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 269 transitions, 3635 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-04 16:16:12,560 INFO L231 Difference]: Finished difference. Result has 198 places, 236 transitions, 2997 flow [2024-06-04 16:16:12,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2828, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2997, PETRI_PLACES=198, PETRI_TRANSITIONS=236} [2024-06-04 16:16:12,561 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 145 predicate places. [2024-06-04 16:16:12,561 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 236 transitions, 2997 flow [2024-06-04 16:16:12,561 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) [2024-06-04 16:16:12,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:16:12,562 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:16:12,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-04 16:16:12,562 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 16:16:12,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:16:12,562 INFO L85 PathProgramCache]: Analyzing trace with hash -1682448728, now seen corresponding path program 2 times [2024-06-04 16:16:12,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:16:12,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258490396] [2024-06-04 16:16:12,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:16:12,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:16:12,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:16:12,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:16:12,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:16:12,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258490396] [2024-06-04 16:16:12,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258490396] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:16:12,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:16:12,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:16:12,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136259831] [2024-06-04 16:16:12,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:16:12,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:16:12,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:16:12,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:16:12,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:16:12,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-04 16:16:12,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 236 transitions, 2997 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) [2024-06-04 16:16:12,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:16:12,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-04 16:16:12,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:16:14,750 INFO L124 PetriNetUnfolderBase]: 10170/15319 cut-off events. [2024-06-04 16:16:14,750 INFO L125 PetriNetUnfolderBase]: For 342514/342514 co-relation queries the response was YES. [2024-06-04 16:16:14,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94027 conditions, 15319 events. 10170/15319 cut-off events. For 342514/342514 co-relation queries the response was YES. Maximal size of possible extension queue 865. Compared 103161 event pairs, 3636 based on Foata normal form. 8/15324 useless extension candidates. Maximal degree in co-relation 93932. Up to 14402 conditions per place. [2024-06-04 16:16:14,922 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 231 selfloop transitions, 22 changer transitions 0/261 dead transitions. [2024-06-04 16:16:14,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 261 transitions, 3621 flow [2024-06-04 16:16:14,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:16:14,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:16:14,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 166 transitions. [2024-06-04 16:16:14,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5533333333333333 [2024-06-04 16:16:14,924 INFO L175 Difference]: Start difference. First operand has 198 places, 236 transitions, 2997 flow. Second operand 6 states and 166 transitions. [2024-06-04 16:16:14,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 261 transitions, 3621 flow [2024-06-04 16:16:15,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 261 transitions, 3564 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-04 16:16:15,873 INFO L231 Difference]: Finished difference. Result has 202 places, 238 transitions, 3032 flow [2024-06-04 16:16:15,874 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2948, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3032, PETRI_PLACES=202, PETRI_TRANSITIONS=238} [2024-06-04 16:16:15,874 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 149 predicate places. [2024-06-04 16:16:15,874 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 238 transitions, 3032 flow [2024-06-04 16:16:15,874 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) [2024-06-04 16:16:15,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:16:15,874 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:16:15,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-04 16:16:15,875 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 16:16:15,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:16:15,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1688159672, now seen corresponding path program 1 times [2024-06-04 16:16:15,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:16:15,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233451547] [2024-06-04 16:16:15,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:16:15,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:16:15,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:16:16,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:16:16,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:16:16,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233451547] [2024-06-04 16:16:16,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233451547] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:16:16,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:16:16,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:16:16,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617347535] [2024-06-04 16:16:16,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:16:16,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:16:16,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:16:16,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:16:16,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:16:16,197 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-04 16:16:16,197 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 238 transitions, 3032 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) [2024-06-04 16:16:16,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:16:16,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-04 16:16:16,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:16:18,026 INFO L124 PetriNetUnfolderBase]: 10188/15374 cut-off events. [2024-06-04 16:16:18,026 INFO L125 PetriNetUnfolderBase]: For 348873/348875 co-relation queries the response was YES. [2024-06-04 16:16:18,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94446 conditions, 15374 events. 10188/15374 cut-off events. For 348873/348875 co-relation queries the response was YES. Maximal size of possible extension queue 868. Compared 103938 event pairs, 3626 based on Foata normal form. 3/15373 useless extension candidates. Maximal degree in co-relation 94349. Up to 14410 conditions per place. [2024-06-04 16:16:18,207 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 231 selfloop transitions, 39 changer transitions 0/278 dead transitions. [2024-06-04 16:16:18,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 278 transitions, 4008 flow [2024-06-04 16:16:18,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:16:18,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:16:18,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 172 transitions. [2024-06-04 16:16:18,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5733333333333334 [2024-06-04 16:16:18,209 INFO L175 Difference]: Start difference. First operand has 202 places, 238 transitions, 3032 flow. Second operand 6 states and 172 transitions. [2024-06-04 16:16:18,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 278 transitions, 4008 flow [2024-06-04 16:16:19,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 278 transitions, 3948 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-04 16:16:19,769 INFO L231 Difference]: Finished difference. Result has 205 places, 253 transitions, 3307 flow [2024-06-04 16:16:19,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2972, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3307, PETRI_PLACES=205, PETRI_TRANSITIONS=253} [2024-06-04 16:16:19,770 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 152 predicate places. [2024-06-04 16:16:19,770 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 253 transitions, 3307 flow [2024-06-04 16:16:19,770 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) [2024-06-04 16:16:19,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:16:19,770 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:16:19,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-04 16:16:19,773 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 16:16:19,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:16:19,773 INFO L85 PathProgramCache]: Analyzing trace with hash -1682445752, now seen corresponding path program 2 times [2024-06-04 16:16:19,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:16:19,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690171741] [2024-06-04 16:16:19,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:16:19,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:16:19,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:16:20,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:16:20,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:16:20,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690171741] [2024-06-04 16:16:20,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690171741] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:16:20,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:16:20,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:16:20,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964777586] [2024-06-04 16:16:20,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:16:20,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:16:20,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:16:20,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:16:20,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:16:20,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-04 16:16:20,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 253 transitions, 3307 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) [2024-06-04 16:16:20,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:16:20,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-04 16:16:20,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:16:22,302 INFO L124 PetriNetUnfolderBase]: 10206/15389 cut-off events. [2024-06-04 16:16:22,303 INFO L125 PetriNetUnfolderBase]: For 374077/374079 co-relation queries the response was YES. [2024-06-04 16:16:22,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97394 conditions, 15389 events. 10206/15389 cut-off events. For 374077/374079 co-relation queries the response was YES. Maximal size of possible extension queue 868. Compared 103780 event pairs, 3621 based on Foata normal form. 3/15388 useless extension candidates. Maximal degree in co-relation 97294. Up to 14430 conditions per place. [2024-06-04 16:16:22,483 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 228 selfloop transitions, 47 changer transitions 0/283 dead transitions. [2024-06-04 16:16:22,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 283 transitions, 4218 flow [2024-06-04 16:16:22,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:16:22,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:16:22,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 169 transitions. [2024-06-04 16:16:22,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5633333333333334 [2024-06-04 16:16:22,485 INFO L175 Difference]: Start difference. First operand has 205 places, 253 transitions, 3307 flow. Second operand 6 states and 169 transitions. [2024-06-04 16:16:22,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 283 transitions, 4218 flow [2024-06-04 16:16:23,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 283 transitions, 4101 flow, removed 52 selfloop flow, removed 1 redundant places. [2024-06-04 16:16:23,905 INFO L231 Difference]: Finished difference. Result has 211 places, 262 transitions, 3464 flow [2024-06-04 16:16:23,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3218, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3464, PETRI_PLACES=211, PETRI_TRANSITIONS=262} [2024-06-04 16:16:23,906 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 158 predicate places. [2024-06-04 16:16:23,906 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 262 transitions, 3464 flow [2024-06-04 16:16:23,906 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) [2024-06-04 16:16:23,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:16:23,906 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:16:23,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-04 16:16:23,906 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 16:16:23,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:16:23,907 INFO L85 PathProgramCache]: Analyzing trace with hash -403425718, now seen corresponding path program 3 times [2024-06-04 16:16:23,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:16:23,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89687985] [2024-06-04 16:16:23,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:16:23,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:16:23,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:16:24,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:16:24,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:16:24,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89687985] [2024-06-04 16:16:24,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89687985] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:16:24,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:16:24,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:16:24,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165061147] [2024-06-04 16:16:24,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:16:24,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:16:24,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:16:24,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:16:24,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:16:24,245 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-04 16:16:24,246 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 262 transitions, 3464 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) [2024-06-04 16:16:24,246 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:16:24,246 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-04 16:16:24,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:16:26,139 INFO L124 PetriNetUnfolderBase]: 10180/15361 cut-off events. [2024-06-04 16:16:26,140 INFO L125 PetriNetUnfolderBase]: For 385329/385329 co-relation queries the response was YES. [2024-06-04 16:16:26,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97246 conditions, 15361 events. 10180/15361 cut-off events. For 385329/385329 co-relation queries the response was YES. Maximal size of possible extension queue 866. Compared 103685 event pairs, 3619 based on Foata normal form. 8/15366 useless extension candidates. Maximal degree in co-relation 97143. Up to 14414 conditions per place. [2024-06-04 16:16:26,357 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 250 selfloop transitions, 22 changer transitions 0/280 dead transitions. [2024-06-04 16:16:26,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 280 transitions, 4089 flow [2024-06-04 16:16:26,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:16:26,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:16:26,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 160 transitions. [2024-06-04 16:16:26,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2024-06-04 16:16:26,358 INFO L175 Difference]: Start difference. First operand has 211 places, 262 transitions, 3464 flow. Second operand 6 states and 160 transitions. [2024-06-04 16:16:26,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 280 transitions, 4089 flow [2024-06-04 16:16:27,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 280 transitions, 3999 flow, removed 19 selfloop flow, removed 2 redundant places. [2024-06-04 16:16:27,992 INFO L231 Difference]: Finished difference. Result has 215 places, 263 transitions, 3439 flow [2024-06-04 16:16:27,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3376, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3439, PETRI_PLACES=215, PETRI_TRANSITIONS=263} [2024-06-04 16:16:27,992 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 162 predicate places. [2024-06-04 16:16:27,992 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 263 transitions, 3439 flow [2024-06-04 16:16:27,993 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) [2024-06-04 16:16:27,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:16:27,993 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:16:27,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-04 16:16:27,993 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 16:16:27,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:16:27,993 INFO L85 PathProgramCache]: Analyzing trace with hash 1370735312, now seen corresponding path program 3 times [2024-06-04 16:16:27,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:16:27,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100489597] [2024-06-04 16:16:27,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:16:27,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:16:28,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:16:28,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:16:28,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:16:28,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100489597] [2024-06-04 16:16:28,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100489597] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:16:28,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:16:28,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:16:28,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940920111] [2024-06-04 16:16:28,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:16:28,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:16:28,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:16:28,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:16:28,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:16:28,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-04 16:16:28,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 263 transitions, 3439 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) [2024-06-04 16:16:28,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:16:28,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-04 16:16:28,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:16:30,469 INFO L124 PetriNetUnfolderBase]: 10176/15360 cut-off events. [2024-06-04 16:16:30,470 INFO L125 PetriNetUnfolderBase]: For 390245/390247 co-relation queries the response was YES. [2024-06-04 16:16:30,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97378 conditions, 15360 events. 10176/15360 cut-off events. For 390245/390247 co-relation queries the response was YES. Maximal size of possible extension queue 866. Compared 103813 event pairs, 3618 based on Foata normal form. 3/15359 useless extension candidates. Maximal degree in co-relation 97274. Up to 14411 conditions per place. [2024-06-04 16:16:30,633 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 239 selfloop transitions, 35 changer transitions 0/282 dead transitions. [2024-06-04 16:16:30,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 282 transitions, 4119 flow [2024-06-04 16:16:30,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:16:30,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:16:30,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 147 transitions. [2024-06-04 16:16:30,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.588 [2024-06-04 16:16:30,635 INFO L175 Difference]: Start difference. First operand has 215 places, 263 transitions, 3439 flow. Second operand 5 states and 147 transitions. [2024-06-04 16:16:30,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 282 transitions, 4119 flow [2024-06-04 16:16:32,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 282 transitions, 4037 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-04 16:16:32,378 INFO L231 Difference]: Finished difference. Result has 215 places, 263 transitions, 3439 flow [2024-06-04 16:16:32,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3357, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3439, PETRI_PLACES=215, PETRI_TRANSITIONS=263} [2024-06-04 16:16:32,379 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 162 predicate places. [2024-06-04 16:16:32,379 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 263 transitions, 3439 flow [2024-06-04 16:16:32,379 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) [2024-06-04 16:16:32,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:16:32,379 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:16:32,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-04 16:16:32,379 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 16:16:32,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:16:32,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1422679574, now seen corresponding path program 4 times [2024-06-04 16:16:32,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:16:32,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943504635] [2024-06-04 16:16:32,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:16:32,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:16:32,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:16:32,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:16:32,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:16:32,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943504635] [2024-06-04 16:16:32,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943504635] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:16:32,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:16:32,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:16:32,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684109749] [2024-06-04 16:16:32,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:16:32,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:16:32,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:16:32,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:16:32,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:16:32,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-04 16:16:32,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 263 transitions, 3439 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) [2024-06-04 16:16:32,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:16:32,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-04 16:16:32,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:16:34,696 INFO L124 PetriNetUnfolderBase]: 10172/15357 cut-off events. [2024-06-04 16:16:34,696 INFO L125 PetriNetUnfolderBase]: For 400693/400695 co-relation queries the response was YES. [2024-06-04 16:16:34,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97544 conditions, 15357 events. 10172/15357 cut-off events. For 400693/400695 co-relation queries the response was YES. Maximal size of possible extension queue 866. Compared 103661 event pairs, 3616 based on Foata normal form. 3/15358 useless extension candidates. Maximal degree in co-relation 97440. Up to 14407 conditions per place. [2024-06-04 16:16:34,905 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 238 selfloop transitions, 39 changer transitions 0/285 dead transitions. [2024-06-04 16:16:34,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 285 transitions, 4077 flow [2024-06-04 16:16:34,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:16:34,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:16:34,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 188 transitions. [2024-06-04 16:16:34,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5371428571428571 [2024-06-04 16:16:34,907 INFO L175 Difference]: Start difference. First operand has 215 places, 263 transitions, 3439 flow. Second operand 7 states and 188 transitions. [2024-06-04 16:16:34,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 285 transitions, 4077 flow [2024-06-04 16:16:36,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 285 transitions, 3956 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-04 16:16:36,842 INFO L231 Difference]: Finished difference. Result has 218 places, 265 transitions, 3442 flow [2024-06-04 16:16:36,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3334, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3442, PETRI_PLACES=218, PETRI_TRANSITIONS=265} [2024-06-04 16:16:36,843 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 165 predicate places. [2024-06-04 16:16:36,843 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 265 transitions, 3442 flow [2024-06-04 16:16:36,843 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) [2024-06-04 16:16:36,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:16:36,843 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:16:36,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-04 16:16:36,843 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 16:16:36,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:16:36,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1320867424, now seen corresponding path program 5 times [2024-06-04 16:16:36,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:16:36,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333811374] [2024-06-04 16:16:36,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:16:36,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:16:36,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:16:37,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:16:37,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:16:37,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333811374] [2024-06-04 16:16:37,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333811374] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:16:37,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:16:37,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:16:37,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601054863] [2024-06-04 16:16:37,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:16:37,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:16:37,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:16:37,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:16:37,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:16:37,152 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-04 16:16:37,152 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 265 transitions, 3442 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) [2024-06-04 16:16:37,152 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:16:37,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-04 16:16:37,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:16:39,113 INFO L124 PetriNetUnfolderBase]: 10168/15347 cut-off events. [2024-06-04 16:16:39,113 INFO L125 PetriNetUnfolderBase]: For 412659/412661 co-relation queries the response was YES. [2024-06-04 16:16:39,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97719 conditions, 15347 events. 10168/15347 cut-off events. For 412659/412661 co-relation queries the response was YES. Maximal size of possible extension queue 866. Compared 103682 event pairs, 3631 based on Foata normal form. 3/15347 useless extension candidates. Maximal degree in co-relation 97614. Up to 14384 conditions per place. [2024-06-04 16:16:39,350 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 221 selfloop transitions, 51 changer transitions 0/280 dead transitions. [2024-06-04 16:16:39,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 280 transitions, 4044 flow [2024-06-04 16:16:39,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:16:39,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:16:39,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 161 transitions. [2024-06-04 16:16:39,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5366666666666666 [2024-06-04 16:16:39,352 INFO L175 Difference]: Start difference. First operand has 218 places, 265 transitions, 3442 flow. Second operand 6 states and 161 transitions. [2024-06-04 16:16:39,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 280 transitions, 4044 flow [2024-06-04 16:16:41,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 280 transitions, 3936 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-04 16:16:41,645 INFO L231 Difference]: Finished difference. Result has 220 places, 267 transitions, 3469 flow [2024-06-04 16:16:41,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3346, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3469, PETRI_PLACES=220, PETRI_TRANSITIONS=267} [2024-06-04 16:16:41,646 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 167 predicate places. [2024-06-04 16:16:41,646 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 267 transitions, 3469 flow [2024-06-04 16:16:41,646 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) [2024-06-04 16:16:41,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:16:41,646 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:16:41,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-04 16:16:41,646 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 16:16:41,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:16:41,647 INFO L85 PathProgramCache]: Analyzing trace with hash 1333255520, now seen corresponding path program 1 times [2024-06-04 16:16:41,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:16:41,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383642227] [2024-06-04 16:16:41,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:16:41,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:16:41,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:16:41,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:16:41,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:16:41,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383642227] [2024-06-04 16:16:41,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383642227] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:16:41,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:16:41,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:16:41,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524211032] [2024-06-04 16:16:41,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:16:41,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:16:41,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:16:41,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:16:41,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:16:41,965 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-04 16:16:41,966 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 267 transitions, 3469 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) [2024-06-04 16:16:41,966 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:16:41,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-04 16:16:41,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:16:44,026 INFO L124 PetriNetUnfolderBase]: 10149/15307 cut-off events. [2024-06-04 16:16:44,027 INFO L125 PetriNetUnfolderBase]: For 424006/424006 co-relation queries the response was YES. [2024-06-04 16:16:44,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97535 conditions, 15307 events. 10149/15307 cut-off events. For 424006/424006 co-relation queries the response was YES. Maximal size of possible extension queue 863. Compared 103195 event pairs, 3593 based on Foata normal form. 6/15310 useless extension candidates. Maximal degree in co-relation 97428. Up to 14312 conditions per place. [2024-06-04 16:16:44,235 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 256 selfloop transitions, 28 changer transitions 0/292 dead transitions. [2024-06-04 16:16:44,235 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 292 transitions, 4207 flow [2024-06-04 16:16:44,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:16:44,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:16:44,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 162 transitions. [2024-06-04 16:16:44,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.54 [2024-06-04 16:16:44,236 INFO L175 Difference]: Start difference. First operand has 220 places, 267 transitions, 3469 flow. Second operand 6 states and 162 transitions. [2024-06-04 16:16:44,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 292 transitions, 4207 flow [2024-06-04 16:16:46,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 292 transitions, 4121 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-04 16:16:46,197 INFO L231 Difference]: Finished difference. Result has 224 places, 272 transitions, 3544 flow [2024-06-04 16:16:46,197 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3383, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3544, PETRI_PLACES=224, PETRI_TRANSITIONS=272} [2024-06-04 16:16:46,198 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 171 predicate places. [2024-06-04 16:16:46,198 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 272 transitions, 3544 flow [2024-06-04 16:16:46,198 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) [2024-06-04 16:16:46,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:16:46,198 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, 1] [2024-06-04 16:16:46,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-04 16:16:46,198 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 16:16:46,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:16:46,199 INFO L85 PathProgramCache]: Analyzing trace with hash 341141604, now seen corresponding path program 1 times [2024-06-04 16:16:46,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:16:46,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641740801] [2024-06-04 16:16:46,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:16:46,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:16:46,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:16:46,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:16:46,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:16:46,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641740801] [2024-06-04 16:16:46,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641740801] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:16:46,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:16:46,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:16:46,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805595749] [2024-06-04 16:16:46,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:16:46,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:16:46,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:16:46,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:16:46,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:16:46,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-04 16:16:46,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 272 transitions, 3544 flow. Second operand has 9 states, 9 states have (on average 18.11111111111111) internal successors, (163), 9 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:16:46,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:16:46,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-04 16:16:46,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:16:48,732 INFO L124 PetriNetUnfolderBase]: 10350/15618 cut-off events. [2024-06-04 16:16:48,732 INFO L125 PetriNetUnfolderBase]: For 452284/452287 co-relation queries the response was YES. [2024-06-04 16:16:48,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100934 conditions, 15618 events. 10350/15618 cut-off events. For 452284/452287 co-relation queries the response was YES. Maximal size of possible extension queue 872. Compared 105594 event pairs, 3643 based on Foata normal form. 6/15619 useless extension candidates. Maximal degree in co-relation 100824. Up to 14377 conditions per place. [2024-06-04 16:16:48,955 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 208 selfloop transitions, 110 changer transitions 0/326 dead transitions. [2024-06-04 16:16:48,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 326 transitions, 4871 flow [2024-06-04 16:16:48,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:16:48,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:16:48,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 180 transitions. [2024-06-04 16:16:48,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-04 16:16:48,957 INFO L175 Difference]: Start difference. First operand has 224 places, 272 transitions, 3544 flow. Second operand 6 states and 180 transitions. [2024-06-04 16:16:48,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 326 transitions, 4871 flow [2024-06-04 16:16:51,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 326 transitions, 4814 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-04 16:16:51,594 INFO L231 Difference]: Finished difference. Result has 229 places, 304 transitions, 4355 flow [2024-06-04 16:16:51,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3487, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4355, PETRI_PLACES=229, PETRI_TRANSITIONS=304} [2024-06-04 16:16:51,594 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 176 predicate places. [2024-06-04 16:16:51,595 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 304 transitions, 4355 flow [2024-06-04 16:16:51,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.11111111111111) internal successors, (163), 9 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:16:51,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:16:51,595 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:16:51,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-04 16:16:51,596 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 16:16:51,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:16:51,596 INFO L85 PathProgramCache]: Analyzing trace with hash 1061213204, now seen corresponding path program 2 times [2024-06-04 16:16:51,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:16:51,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638498997] [2024-06-04 16:16:51,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:16:51,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:16:51,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:16:51,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:16:51,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:16:51,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638498997] [2024-06-04 16:16:51,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638498997] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:16:51,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:16:51,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:16:51,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739890145] [2024-06-04 16:16:51,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:16:51,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:16:51,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:16:51,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:16:51,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:16:52,009 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-04 16:16:52,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 304 transitions, 4355 flow. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:16:52,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:16:52,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-04 16:16:52,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:16:55,065 INFO L124 PetriNetUnfolderBase]: 10326/15588 cut-off events. [2024-06-04 16:16:55,065 INFO L125 PetriNetUnfolderBase]: For 488787/488790 co-relation queries the response was YES. [2024-06-04 16:16:55,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106107 conditions, 15588 events. 10326/15588 cut-off events. For 488787/488790 co-relation queries the response was YES. Maximal size of possible extension queue 870. Compared 105363 event pairs, 3643 based on Foata normal form. 6/15589 useless extension candidates. Maximal degree in co-relation 105994. Up to 14353 conditions per place. [2024-06-04 16:16:55,245 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 208 selfloop transitions, 112 changer transitions 0/328 dead transitions. [2024-06-04 16:16:55,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 328 transitions, 5133 flow [2024-06-04 16:16:55,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:16:55,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:16:55,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 203 transitions. [2024-06-04 16:16:55,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.58 [2024-06-04 16:16:55,246 INFO L175 Difference]: Start difference. First operand has 229 places, 304 transitions, 4355 flow. Second operand 7 states and 203 transitions. [2024-06-04 16:16:55,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 328 transitions, 5133 flow [2024-06-04 16:16:58,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 328 transitions, 4882 flow, removed 93 selfloop flow, removed 3 redundant places. [2024-06-04 16:16:58,036 INFO L231 Difference]: Finished difference. Result has 233 places, 306 transitions, 4396 flow [2024-06-04 16:16:58,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=4126, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4396, PETRI_PLACES=233, PETRI_TRANSITIONS=306} [2024-06-04 16:16:58,037 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 180 predicate places. [2024-06-04 16:16:58,037 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 306 transitions, 4396 flow [2024-06-04 16:16:58,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:16:58,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:16:58,037 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:16:58,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-04 16:16:58,037 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 16:16:58,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:16:58,038 INFO L85 PathProgramCache]: Analyzing trace with hash -392815012, now seen corresponding path program 1 times [2024-06-04 16:16:58,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:16:58,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550180814] [2024-06-04 16:16:58,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:16:58,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:16:58,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:16:58,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:16:58,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:16:58,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550180814] [2024-06-04 16:16:58,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550180814] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:16:58,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:16:58,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:16:58,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179917233] [2024-06-04 16:16:58,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:16:58,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:16:58,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:16:58,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:16:58,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:16:58,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-04 16:16:58,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 306 transitions, 4396 flow. Second operand has 7 states, 7 states have (on average 19.714285714285715) internal successors, (138), 7 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:16:58,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:16:58,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-04 16:16:58,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:17:01,199 INFO L124 PetriNetUnfolderBase]: 10331/15604 cut-off events. [2024-06-04 16:17:01,199 INFO L125 PetriNetUnfolderBase]: For 514591/514599 co-relation queries the response was YES. [2024-06-04 16:17:01,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104848 conditions, 15604 events. 10331/15604 cut-off events. For 514591/514599 co-relation queries the response was YES. Maximal size of possible extension queue 875. Compared 105866 event pairs, 2858 based on Foata normal form. 53/15451 useless extension candidates. Maximal degree in co-relation 104734. Up to 13471 conditions per place. [2024-06-04 16:17:01,380 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 244 selfloop transitions, 66 changer transitions 0/352 dead transitions. [2024-06-04 16:17:01,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 352 transitions, 5398 flow [2024-06-04 16:17:01,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:17:01,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:17:01,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 186 transitions. [2024-06-04 16:17:01,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.62 [2024-06-04 16:17:01,381 INFO L175 Difference]: Start difference. First operand has 233 places, 306 transitions, 4396 flow. Second operand 6 states and 186 transitions. [2024-06-04 16:17:01,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 352 transitions, 5398 flow [2024-06-04 16:17:03,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 352 transitions, 5124 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-04 16:17:03,417 INFO L231 Difference]: Finished difference. Result has 233 places, 317 transitions, 4458 flow [2024-06-04 16:17:03,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=4122, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4458, PETRI_PLACES=233, PETRI_TRANSITIONS=317} [2024-06-04 16:17:03,418 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 180 predicate places. [2024-06-04 16:17:03,418 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 317 transitions, 4458 flow [2024-06-04 16:17:03,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.714285714285715) internal successors, (138), 7 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:17:03,418 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:17:03,418 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:17:03,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-04 16:17:03,419 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 16:17:03,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:17:03,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1562792538, now seen corresponding path program 3 times [2024-06-04 16:17:03,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:17:03,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267350744] [2024-06-04 16:17:03,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:17:03,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:17:03,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:17:03,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:17:03,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:17:03,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267350744] [2024-06-04 16:17:03,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267350744] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:17:03,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:17:03,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:17:03,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61393977] [2024-06-04 16:17:03,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:17:03,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:17:03,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:17:03,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:17:03,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:17:03,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-04 16:17:03,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 317 transitions, 4458 flow. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:17:03,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:17:03,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-04 16:17:03,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:17:06,857 INFO L124 PetriNetUnfolderBase]: 10655/16078 cut-off events. [2024-06-04 16:17:06,857 INFO L125 PetriNetUnfolderBase]: For 466078/466081 co-relation queries the response was YES. [2024-06-04 16:17:07,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108888 conditions, 16078 events. 10655/16078 cut-off events. For 466078/466081 co-relation queries the response was YES. Maximal size of possible extension queue 890. Compared 108906 event pairs, 3658 based on Foata normal form. 1/16075 useless extension candidates. Maximal degree in co-relation 108774. Up to 14957 conditions per place. [2024-06-04 16:17:07,083 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 279 selfloop transitions, 77 changer transitions 0/364 dead transitions. [2024-06-04 16:17:07,083 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 364 transitions, 5631 flow [2024-06-04 16:17:07,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:17:07,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:17:07,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 240 transitions. [2024-06-04 16:17:07,084 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2024-06-04 16:17:07,084 INFO L175 Difference]: Start difference. First operand has 233 places, 317 transitions, 4458 flow. Second operand 9 states and 240 transitions. [2024-06-04 16:17:07,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 364 transitions, 5631 flow [2024-06-04 16:17:09,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 364 transitions, 5541 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-06-04 16:17:09,669 INFO L231 Difference]: Finished difference. Result has 242 places, 335 transitions, 4901 flow [2024-06-04 16:17:09,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=4371, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4901, PETRI_PLACES=242, PETRI_TRANSITIONS=335} [2024-06-04 16:17:09,670 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 189 predicate places. [2024-06-04 16:17:09,670 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 335 transitions, 4901 flow [2024-06-04 16:17:09,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:17:09,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:17:09,670 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:17:09,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-04 16:17:09,670 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 16:17:09,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:17:09,671 INFO L85 PathProgramCache]: Analyzing trace with hash 1410664488, now seen corresponding path program 4 times [2024-06-04 16:17:09,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:17:09,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808653869] [2024-06-04 16:17:09,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:17:09,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:17:09,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:17:10,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:17:10,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:17:10,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808653869] [2024-06-04 16:17:10,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808653869] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:17:10,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:17:10,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:17:10,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175334910] [2024-06-04 16:17:10,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:17:10,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:17:10,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:17:10,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:17:10,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:17:10,052 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-04 16:17:10,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 335 transitions, 4901 flow. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:17:10,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:17:10,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-04 16:17:10,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:17:13,014 INFO L124 PetriNetUnfolderBase]: 10662/16089 cut-off events. [2024-06-04 16:17:13,015 INFO L125 PetriNetUnfolderBase]: For 493325/493328 co-relation queries the response was YES. [2024-06-04 16:17:13,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111387 conditions, 16089 events. 10662/16089 cut-off events. For 493325/493328 co-relation queries the response was YES. Maximal size of possible extension queue 890. Compared 109063 event pairs, 3658 based on Foata normal form. 1/16086 useless extension candidates. Maximal degree in co-relation 111269. Up to 14965 conditions per place. [2024-06-04 16:17:13,196 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 275 selfloop transitions, 78 changer transitions 0/361 dead transitions. [2024-06-04 16:17:13,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 361 transitions, 5845 flow [2024-06-04 16:17:13,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:17:13,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:17:13,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 215 transitions. [2024-06-04 16:17:13,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5375 [2024-06-04 16:17:13,197 INFO L175 Difference]: Start difference. First operand has 242 places, 335 transitions, 4901 flow. Second operand 8 states and 215 transitions. [2024-06-04 16:17:13,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 361 transitions, 5845 flow [2024-06-04 16:17:15,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 361 transitions, 5609 flow, removed 88 selfloop flow, removed 4 redundant places. [2024-06-04 16:17:15,561 INFO L231 Difference]: Finished difference. Result has 246 places, 339 transitions, 4919 flow [2024-06-04 16:17:15,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=4703, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4919, PETRI_PLACES=246, PETRI_TRANSITIONS=339} [2024-06-04 16:17:15,562 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 193 predicate places. [2024-06-04 16:17:15,562 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 339 transitions, 4919 flow [2024-06-04 16:17:15,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:17:15,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:17:15,562 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:17:15,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-04 16:17:15,563 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 16:17:15,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:17:15,563 INFO L85 PathProgramCache]: Analyzing trace with hash -1844455105, now seen corresponding path program 1 times [2024-06-04 16:17:15,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:17:15,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272253801] [2024-06-04 16:17:15,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:17:15,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:17:15,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:17:15,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:17:15,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:17:15,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272253801] [2024-06-04 16:17:15,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272253801] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:17:15,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:17:15,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:17:15,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995856457] [2024-06-04 16:17:15,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:17:15,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:17:15,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:17:15,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:17:15,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:17:16,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-04 16:17:16,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 339 transitions, 4919 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) [2024-06-04 16:17:16,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:17:16,026 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-04 16:17:16,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:17:18,858 INFO L124 PetriNetUnfolderBase]: 10845/16389 cut-off events. [2024-06-04 16:17:18,859 INFO L125 PetriNetUnfolderBase]: For 529966/529969 co-relation queries the response was YES. [2024-06-04 16:17:18,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113072 conditions, 16389 events. 10845/16389 cut-off events. For 529966/529969 co-relation queries the response was YES. Maximal size of possible extension queue 906. Compared 110549 event pairs, 2020 based on Foata normal form. 36/16420 useless extension candidates. Maximal degree in co-relation 112953. Up to 10890 conditions per place. [2024-06-04 16:17:19,049 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 299 selfloop transitions, 90 changer transitions 0/397 dead transitions. [2024-06-04 16:17:19,050 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 397 transitions, 6214 flow [2024-06-04 16:17:19,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:17:19,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:17:19,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 222 transitions. [2024-06-04 16:17:19,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6342857142857142 [2024-06-04 16:17:19,051 INFO L175 Difference]: Start difference. First operand has 246 places, 339 transitions, 4919 flow. Second operand 7 states and 222 transitions. [2024-06-04 16:17:19,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 397 transitions, 6214 flow [2024-06-04 16:17:21,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 397 transitions, 6071 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-04 16:17:21,796 INFO L231 Difference]: Finished difference. Result has 249 places, 340 transitions, 4992 flow [2024-06-04 16:17:21,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=4776, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4992, PETRI_PLACES=249, PETRI_TRANSITIONS=340} [2024-06-04 16:17:21,797 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 196 predicate places. [2024-06-04 16:17:21,797 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 340 transitions, 4992 flow [2024-06-04 16:17:21,797 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) [2024-06-04 16:17:21,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:17:21,797 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:17:21,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-04 16:17:21,797 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 16:17:21,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:17:21,798 INFO L85 PathProgramCache]: Analyzing trace with hash -530775617, now seen corresponding path program 2 times [2024-06-04 16:17:21,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:17:21,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183370928] [2024-06-04 16:17:21,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:17:21,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:17:21,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:17:22,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:17:22,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:17:22,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183370928] [2024-06-04 16:17:22,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183370928] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:17:22,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:17:22,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:17:22,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344272732] [2024-06-04 16:17:22,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:17:22,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:17:22,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:17:22,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:17:22,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:17:22,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-04 16:17:22,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 340 transitions, 4992 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) [2024-06-04 16:17:22,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:17:22,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-04 16:17:22,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:17:25,136 INFO L124 PetriNetUnfolderBase]: 10761/16324 cut-off events. [2024-06-04 16:17:25,136 INFO L125 PetriNetUnfolderBase]: For 524935/524938 co-relation queries the response was YES. [2024-06-04 16:17:25,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112361 conditions, 16324 events. 10761/16324 cut-off events. For 524935/524938 co-relation queries the response was YES. Maximal size of possible extension queue 905. Compared 111168 event pairs, 3038 based on Foata normal form. 36/16355 useless extension candidates. Maximal degree in co-relation 112241. Up to 14364 conditions per place. [2024-06-04 16:17:25,347 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 329 selfloop transitions, 39 changer transitions 0/376 dead transitions. [2024-06-04 16:17:25,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 376 transitions, 5850 flow [2024-06-04 16:17:25,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:17:25,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:17:25,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 181 transitions. [2024-06-04 16:17:25,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6033333333333334 [2024-06-04 16:17:25,349 INFO L175 Difference]: Start difference. First operand has 249 places, 340 transitions, 4992 flow. Second operand 6 states and 181 transitions. [2024-06-04 16:17:25,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 376 transitions, 5850 flow [2024-06-04 16:17:28,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 376 transitions, 5601 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-04 16:17:28,175 INFO L231 Difference]: Finished difference. Result has 249 places, 339 transitions, 4770 flow [2024-06-04 16:17:28,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=4687, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4770, PETRI_PLACES=249, PETRI_TRANSITIONS=339} [2024-06-04 16:17:28,176 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 196 predicate places. [2024-06-04 16:17:28,176 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 339 transitions, 4770 flow [2024-06-04 16:17:28,176 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) [2024-06-04 16:17:28,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:17:28,176 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:17:28,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-04 16:17:28,177 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 16:17:28,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:17:28,177 INFO L85 PathProgramCache]: Analyzing trace with hash -847759088, now seen corresponding path program 5 times [2024-06-04 16:17:28,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:17:28,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400486985] [2024-06-04 16:17:28,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:17:28,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:17:28,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:17:28,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:17:28,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:17:28,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400486985] [2024-06-04 16:17:28,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400486985] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:17:28,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:17:28,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:17:28,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082949489] [2024-06-04 16:17:28,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:17:28,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:17:28,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:17:28,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:17:28,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:17:28,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-04 16:17:28,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 339 transitions, 4770 flow. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:17:28,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:17:28,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-04 16:17:28,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:17:31,222 INFO L124 PetriNetUnfolderBase]: 10757/16283 cut-off events. [2024-06-04 16:17:31,222 INFO L125 PetriNetUnfolderBase]: For 507607/507610 co-relation queries the response was YES. [2024-06-04 16:17:31,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110515 conditions, 16283 events. 10757/16283 cut-off events. For 507607/507610 co-relation queries the response was YES. Maximal size of possible extension queue 909. Compared 111136 event pairs, 3772 based on Foata normal form. 1/16278 useless extension candidates. Maximal degree in co-relation 110395. Up to 15114 conditions per place. [2024-06-04 16:17:31,405 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 270 selfloop transitions, 74 changer transitions 0/352 dead transitions. [2024-06-04 16:17:31,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 352 transitions, 5490 flow [2024-06-04 16:17:31,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:17:31,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:17:31,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 163 transitions. [2024-06-04 16:17:31,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5433333333333333 [2024-06-04 16:17:31,407 INFO L175 Difference]: Start difference. First operand has 249 places, 339 transitions, 4770 flow. Second operand 6 states and 163 transitions. [2024-06-04 16:17:31,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 352 transitions, 5490 flow [2024-06-04 16:17:33,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 352 transitions, 5272 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-04 16:17:33,633 INFO L231 Difference]: Finished difference. Result has 250 places, 339 transitions, 4707 flow [2024-06-04 16:17:33,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=4552, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4707, PETRI_PLACES=250, PETRI_TRANSITIONS=339} [2024-06-04 16:17:33,634 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 197 predicate places. [2024-06-04 16:17:33,634 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 339 transitions, 4707 flow [2024-06-04 16:17:33,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:17:33,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:17:33,634 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:17:33,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-04 16:17:33,634 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-04 16:17:33,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:17:33,635 INFO L85 PathProgramCache]: Analyzing trace with hash 1558428189, now seen corresponding path program 1 times [2024-06-04 16:17:33,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:17:33,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808827294] [2024-06-04 16:17:33,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:17:33,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:17:33,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:17:34,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:17:34,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:17:34,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808827294] [2024-06-04 16:17:34,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808827294] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:17:34,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:17:34,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:17:34,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793832797] [2024-06-04 16:17:34,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:17:34,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:17:34,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:17:34,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:17:34,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:17:34,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-04 16:17:34,065 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 339 transitions, 4707 flow. Second operand has 7 states, 7 states have (on average 19.714285714285715) internal successors, (138), 7 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:17:34,065 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:17:34,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-04 16:17:34,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand