./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe016_pso.oepc_pso.opt_tso.oepc_tso.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/mutex-meet/safe016_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 76401ed0 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe016_pso.oepc_pso.opt_tso.oepc_tso.opt.i ./goblint.2024-05-21_14-57-05.files/mutex-meet/safe016_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-76401ed-m [2024-06-20 17:57:18,917 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-20 17:57:18,982 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-20 17:57:18,986 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-20 17:57:18,987 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-20 17:57:19,014 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-20 17:57:19,014 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-20 17:57:19,015 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-20 17:57:19,015 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-20 17:57:19,018 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-20 17:57:19,019 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-20 17:57:19,019 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-20 17:57:19,020 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-20 17:57:19,021 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-20 17:57:19,021 INFO L153 SettingsManager]: * Use SBE=true [2024-06-20 17:57:19,021 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-20 17:57:19,021 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-20 17:57:19,022 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-20 17:57:19,022 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-20 17:57:19,022 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-20 17:57:19,022 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-20 17:57:19,023 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-20 17:57:19,023 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-20 17:57:19,023 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-20 17:57:19,023 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-20 17:57:19,023 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-20 17:57:19,024 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-20 17:57:19,024 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-20 17:57:19,024 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-20 17:57:19,025 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-20 17:57:19,025 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-20 17:57:19,025 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-20 17:57:19,026 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 17:57:19,026 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-20 17:57:19,026 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-20 17:57:19,026 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-20 17:57:19,026 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-20 17:57:19,027 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-20 17:57:19,027 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-20 17:57:19,027 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-20 17:57:19,027 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-20 17:57:19,027 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-20 17:57:19,028 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-20 17:57:19,028 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-20 17:57:19,234 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-20 17:57:19,257 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-20 17:57:19,260 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-20 17:57:19,261 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-20 17:57:19,261 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-20 17:57:19,262 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/mutex-meet/safe016_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml [2024-06-20 17:57:19,392 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-20 17:57:19,392 INFO L274 PluginConnector]: CDTParser initialized [2024-06-20 17:57:19,392 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe016_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-20 17:57:20,361 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-20 17:57:20,612 INFO L384 CDTParser]: Found 1 translation units. [2024-06-20 17:57:20,613 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe016_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-20 17:57:20,626 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c324d8840/8d4be4ba288847a0a04ed092d82eaf0c/FLAG2fb0ec54a [2024-06-20 17:57:20,948 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c324d8840/8d4be4ba288847a0a04ed092d82eaf0c [2024-06-20 17:57:20,948 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-20 17:57:20,949 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-20 17:57:20,950 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-20 17:57:20,950 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-20 17:57:20,957 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-20 17:57:20,958 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 05:57:19" (1/2) ... [2024-06-20 17:57:20,959 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b2052fb and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:57:20, skipping insertion in model container [2024-06-20 17:57:20,959 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 05:57:19" (1/2) ... [2024-06-20 17:57:20,960 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@64361118 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:57:20, skipping insertion in model container [2024-06-20 17:57:20,961 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 05:57:20" (2/2) ... [2024-06-20 17:57:20,961 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b2052fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:57:20, skipping insertion in model container [2024-06-20 17:57:20,961 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 05:57:20" (2/2) ... [2024-06-20 17:57:20,962 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-20 17:57:21,048 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-20 17:57:21,049 INFO L97 edCorrectnessWitness]: Location invariant before [L791-L791] ((((((! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2))) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || (0 <= __unbuffered_p0_EAX && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || (((((((((((((((long long )__unbuffered_cnt + (long long )__unbuffered_p0_EAX >= 0LL && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )x + (long long )y >= 0LL))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || (((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p2_EAX) && 0 <= x) && 0 <= y) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((x == 0 || x == 1) || x == 2)) && ((y == 0 || y == 1) || y == 2))) [2024-06-20 17:57:21,050 INFO L97 edCorrectnessWitness]: Location invariant before [L789-L789] ((((((! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2))) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || (0 <= __unbuffered_p0_EAX && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || (((((((((((((((long long )__unbuffered_cnt + (long long )__unbuffered_p0_EAX >= 0LL && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )x + (long long )y >= 0LL))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || (((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p2_EAX) && 0 <= x) && 0 <= y) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((x == 0 || x == 1) || x == 2)) && ((y == 0 || y == 1) || y == 2))) [2024-06-20 17:57:21,050 INFO L97 edCorrectnessWitness]: Location invariant before [L794-L794] ((((((! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2))) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || (0 <= __unbuffered_p0_EAX && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || (((((((((((((((long long )__unbuffered_cnt + (long long )__unbuffered_p0_EAX >= 0LL && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )x + (long long )y >= 0LL))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || (((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p2_EAX) && 0 <= x) && 0 <= y) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((x == 0 || x == 1) || x == 2)) && ((y == 0 || y == 1) || y == 2))) [2024-06-20 17:57:21,050 INFO L97 edCorrectnessWitness]: Location invariant before [L793-L793] ((((((! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2))) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || (0 <= __unbuffered_p0_EAX && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || (((((((((((((((long long )__unbuffered_cnt + (long long )__unbuffered_p0_EAX >= 0LL && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )x + (long long )y >= 0LL))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || (((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p2_EAX) && 0 <= x) && 0 <= y) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((x == 0 || x == 1) || x == 2)) && ((y == 0 || y == 1) || y == 2))) [2024-06-20 17:57:21,050 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-20 17:57:21,051 INFO L106 edCorrectnessWitness]: ghost_update [L787-L787] multithreaded = 1; [2024-06-20 17:57:21,089 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-20 17:57:21,369 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 17:57:21,378 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-20 17:57:21,525 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 17:57:21,562 INFO L206 MainTranslator]: Completed translation [2024-06-20 17:57:21,562 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:57:21 WrapperNode [2024-06-20 17:57:21,563 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-20 17:57:21,564 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-20 17:57:21,564 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-20 17:57:21,564 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-20 17:57:21,569 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:57:21" (1/1) ... [2024-06-20 17:57:21,604 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:57:21" (1/1) ... [2024-06-20 17:57:21,639 INFO L138 Inliner]: procedures = 176, calls = 47, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 73 [2024-06-20 17:57:21,640 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-20 17:57:21,640 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-20 17:57:21,641 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-20 17:57:21,641 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-20 17:57:21,650 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:57:21" (1/1) ... [2024-06-20 17:57:21,650 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:57:21" (1/1) ... [2024-06-20 17:57:21,661 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:57:21" (1/1) ... [2024-06-20 17:57:21,682 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]. [2024-06-20 17:57:21,682 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:57:21" (1/1) ... [2024-06-20 17:57:21,682 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:57:21" (1/1) ... [2024-06-20 17:57:21,698 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:57:21" (1/1) ... [2024-06-20 17:57:21,699 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:57:21" (1/1) ... [2024-06-20 17:57:21,701 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:57:21" (1/1) ... [2024-06-20 17:57:21,715 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:57:21" (1/1) ... [2024-06-20 17:57:21,719 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-20 17:57:21,732 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-20 17:57:21,733 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-20 17:57:21,733 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-20 17:57:21,745 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:57:21" (1/1) ... [2024-06-20 17:57:21,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 17:57:21,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-20 17:57:21,785 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) [2024-06-20 17:57:21,815 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 [2024-06-20 17:57:21,831 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-20 17:57:21,831 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-20 17:57:21,831 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-20 17:57:21,832 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-20 17:57:21,832 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-20 17:57:21,832 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-20 17:57:21,832 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-20 17:57:21,832 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-20 17:57:21,832 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-20 17:57:21,833 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-20 17:57:21,833 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-20 17:57:21,833 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-20 17:57:21,833 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-20 17:57:21,833 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-20 17:57:21,834 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-20 17:57:21,945 INFO L244 CfgBuilder]: Building ICFG [2024-06-20 17:57:21,947 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-20 17:57:22,171 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-20 17:57:22,171 INFO L293 CfgBuilder]: Performing block encoding [2024-06-20 17:57:22,249 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-20 17:57:22,250 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-20 17:57:22,250 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 05:57:22 BoogieIcfgContainer [2024-06-20 17:57:22,250 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-20 17:57:22,252 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-20 17:57:22,252 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-20 17:57:22,255 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-20 17:57:22,255 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 05:57:19" (1/4) ... [2024-06-20 17:57:22,256 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3604cd6a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 05:57:22, skipping insertion in model container [2024-06-20 17:57:22,256 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.06 05:57:20" (2/4) ... [2024-06-20 17:57:22,256 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3604cd6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.06 05:57:22, skipping insertion in model container [2024-06-20 17:57:22,256 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:57:21" (3/4) ... [2024-06-20 17:57:22,256 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3604cd6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.06 05:57:22, skipping insertion in model container [2024-06-20 17:57:22,257 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 05:57:22" (4/4) ... [2024-06-20 17:57:22,258 INFO L112 eAbstractionObserver]: Analyzing ICFG safe016_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-20 17:57:22,273 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-20 17:57:22,274 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-20 17:57:22,274 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-20 17:57:22,317 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-20 17:57:22,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 62 places, 49 transitions, 114 flow [2024-06-20 17:57:22,385 INFO L124 PetriNetUnfolderBase]: 0/45 cut-off events. [2024-06-20 17:57:22,385 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 17:57:22,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58 conditions, 45 events. 0/45 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 81 event pairs, 0 based on Foata normal form. 0/41 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-20 17:57:22,387 INFO L82 GeneralOperation]: Start removeDead. Operand has 62 places, 49 transitions, 114 flow [2024-06-20 17:57:22,392 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 52 places, 39 transitions, 90 flow [2024-06-20 17:57:22,403 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-20 17:57:22,410 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;@38c2ba44, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-20 17:57:22,411 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-20 17:57:22,415 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-20 17:57:22,416 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-20 17:57:22,416 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 17:57:22,416 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:57:22,417 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-20 17:57:22,417 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)] === [2024-06-20 17:57:22,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:57:22,424 INFO L85 PathProgramCache]: Analyzing trace with hash 225172065, now seen corresponding path program 1 times [2024-06-20 17:57:22,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:57:22,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025218243] [2024-06-20 17:57:22,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:57:22,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:57:22,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:57:23,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:57:23,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:57:23,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025218243] [2024-06-20 17:57:23,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025218243] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:57:23,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:57:23,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-20 17:57:23,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641658190] [2024-06-20 17:57:23,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:57:23,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-20 17:57:23,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:57:23,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-20 17:57:23,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-20 17:57:23,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-06-20 17:57:23,112 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 39 transitions, 90 flow. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:57:23,113 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:57:23,113 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-06-20 17:57:23,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:57:23,551 INFO L124 PetriNetUnfolderBase]: 2723/4049 cut-off events. [2024-06-20 17:57:23,551 INFO L125 PetriNetUnfolderBase]: For 82/82 co-relation queries the response was YES. [2024-06-20 17:57:23,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8049 conditions, 4049 events. 2723/4049 cut-off events. For 82/82 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 22395 event pairs, 1898 based on Foata normal form. 1/3918 useless extension candidates. Maximal degree in co-relation 8036. Up to 3813 conditions per place. [2024-06-20 17:57:23,580 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 37 selfloop transitions, 5 changer transitions 0/53 dead transitions. [2024-06-20 17:57:23,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 53 transitions, 211 flow [2024-06-20 17:57:23,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-20 17:57:23,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-20 17:57:23,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 103 transitions. [2024-06-20 17:57:23,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7006802721088435 [2024-06-20 17:57:23,592 INFO L175 Difference]: Start difference. First operand has 52 places, 39 transitions, 90 flow. Second operand 3 states and 103 transitions. [2024-06-20 17:57:23,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 53 transitions, 211 flow [2024-06-20 17:57:23,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 53 transitions, 204 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-20 17:57:23,599 INFO L231 Difference]: Finished difference. Result has 51 places, 43 transitions, 125 flow [2024-06-20 17:57:23,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=125, PETRI_PLACES=51, PETRI_TRANSITIONS=43} [2024-06-20 17:57:23,604 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -1 predicate places. [2024-06-20 17:57:23,604 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 43 transitions, 125 flow [2024-06-20 17:57:23,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:57:23,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:57:23,605 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:57:23,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-20 17:57:23,605 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)] === [2024-06-20 17:57:23,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:57:23,606 INFO L85 PathProgramCache]: Analyzing trace with hash -623443094, now seen corresponding path program 1 times [2024-06-20 17:57:23,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:57:23,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192419097] [2024-06-20 17:57:23,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:57:23,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:57:23,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:57:23,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:57:23,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:57:23,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192419097] [2024-06-20 17:57:23,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192419097] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:57:23,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:57:23,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 17:57:23,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837609057] [2024-06-20 17:57:23,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:57:23,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 17:57:23,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:57:23,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 17:57:23,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-20 17:57:23,934 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-20 17:57:23,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 43 transitions, 125 flow. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:57:23,935 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:57:23,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-20 17:57:23,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:57:24,494 INFO L124 PetriNetUnfolderBase]: 4385/6499 cut-off events. [2024-06-20 17:57:24,494 INFO L125 PetriNetUnfolderBase]: For 1123/1132 co-relation queries the response was YES. [2024-06-20 17:57:24,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14765 conditions, 6499 events. 4385/6499 cut-off events. For 1123/1132 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 36112 event pairs, 1932 based on Foata normal form. 11/6499 useless extension candidates. Maximal degree in co-relation 14753. Up to 5945 conditions per place. [2024-06-20 17:57:24,528 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 58 selfloop transitions, 13 changer transitions 0/80 dead transitions. [2024-06-20 17:57:24,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 80 transitions, 376 flow [2024-06-20 17:57:24,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 17:57:24,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 17:57:24,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 137 transitions. [2024-06-20 17:57:24,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6989795918367347 [2024-06-20 17:57:24,531 INFO L175 Difference]: Start difference. First operand has 51 places, 43 transitions, 125 flow. Second operand 4 states and 137 transitions. [2024-06-20 17:57:24,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 80 transitions, 376 flow [2024-06-20 17:57:24,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 80 transitions, 368 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-20 17:57:24,535 INFO L231 Difference]: Finished difference. Result has 55 places, 55 transitions, 222 flow [2024-06-20 17:57:24,535 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=222, PETRI_PLACES=55, PETRI_TRANSITIONS=55} [2024-06-20 17:57:24,536 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 3 predicate places. [2024-06-20 17:57:24,536 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 55 transitions, 222 flow [2024-06-20 17:57:24,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:57:24,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:57:24,537 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:57:24,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-20 17:57:24,537 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 17:57:24,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:57:24,538 INFO L85 PathProgramCache]: Analyzing trace with hash -2128306583, now seen corresponding path program 1 times [2024-06-20 17:57:24,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:57:24,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807637433] [2024-06-20 17:57:24,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:57:24,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:57:24,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:57:24,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:57:24,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:57:24,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807637433] [2024-06-20 17:57:24,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807637433] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:57:24,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:57:24,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 17:57:24,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605497713] [2024-06-20 17:57:24,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:57:24,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 17:57:24,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:57:24,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 17:57:24,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 17:57:24,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-20 17:57:24,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 55 transitions, 222 flow. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:57:24,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:57:24,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-20 17:57:24,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:57:25,354 INFO L124 PetriNetUnfolderBase]: 4527/6713 cut-off events. [2024-06-20 17:57:25,354 INFO L125 PetriNetUnfolderBase]: For 4346/4370 co-relation queries the response was YES. [2024-06-20 17:57:25,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18077 conditions, 6713 events. 4527/6713 cut-off events. For 4346/4370 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 37507 event pairs, 1443 based on Foata normal form. 46/6748 useless extension candidates. Maximal degree in co-relation 18062. Up to 5937 conditions per place. [2024-06-20 17:57:25,392 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 68 selfloop transitions, 16 changer transitions 0/93 dead transitions. [2024-06-20 17:57:25,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 93 transitions, 506 flow [2024-06-20 17:57:25,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 17:57:25,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 17:57:25,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 167 transitions. [2024-06-20 17:57:25,395 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6816326530612244 [2024-06-20 17:57:25,395 INFO L175 Difference]: Start difference. First operand has 55 places, 55 transitions, 222 flow. Second operand 5 states and 167 transitions. [2024-06-20 17:57:25,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 93 transitions, 506 flow [2024-06-20 17:57:25,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 93 transitions, 502 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-20 17:57:25,398 INFO L231 Difference]: Finished difference. Result has 59 places, 57 transitions, 277 flow [2024-06-20 17:57:25,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=277, PETRI_PLACES=59, PETRI_TRANSITIONS=57} [2024-06-20 17:57:25,399 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 7 predicate places. [2024-06-20 17:57:25,399 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 57 transitions, 277 flow [2024-06-20 17:57:25,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:57:25,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:57:25,400 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:57:25,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-20 17:57:25,400 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)] === [2024-06-20 17:57:25,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:57:25,401 INFO L85 PathProgramCache]: Analyzing trace with hash 1404815442, now seen corresponding path program 1 times [2024-06-20 17:57:25,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:57:25,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918727563] [2024-06-20 17:57:25,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:57:25,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:57:25,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:57:25,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:57:25,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:57:25,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918727563] [2024-06-20 17:57:25,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918727563] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:57:25,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:57:25,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-20 17:57:25,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323017130] [2024-06-20 17:57:25,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:57:25,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-20 17:57:25,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:57:25,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-20 17:57:25,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-20 17:57:25,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-20 17:57:25,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 57 transitions, 277 flow. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:57:25,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:57:25,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-20 17:57:25,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:57:26,070 INFO L124 PetriNetUnfolderBase]: 3542/5228 cut-off events. [2024-06-20 17:57:26,071 INFO L125 PetriNetUnfolderBase]: For 5883/5883 co-relation queries the response was YES. [2024-06-20 17:57:26,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15769 conditions, 5228 events. 3542/5228 cut-off events. For 5883/5883 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 29056 event pairs, 1668 based on Foata normal form. 6/5225 useless extension candidates. Maximal degree in co-relation 15751. Up to 4874 conditions per place. [2024-06-20 17:57:26,098 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 52 selfloop transitions, 14 changer transitions 0/76 dead transitions. [2024-06-20 17:57:26,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 76 transitions, 464 flow [2024-06-20 17:57:26,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 17:57:26,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 17:57:26,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 131 transitions. [2024-06-20 17:57:26,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6683673469387755 [2024-06-20 17:57:26,100 INFO L175 Difference]: Start difference. First operand has 59 places, 57 transitions, 277 flow. Second operand 4 states and 131 transitions. [2024-06-20 17:57:26,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 76 transitions, 464 flow [2024-06-20 17:57:26,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 76 transitions, 429 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-20 17:57:26,104 INFO L231 Difference]: Finished difference. Result has 61 places, 59 transitions, 306 flow [2024-06-20 17:57:26,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=306, PETRI_PLACES=61, PETRI_TRANSITIONS=59} [2024-06-20 17:57:26,104 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 9 predicate places. [2024-06-20 17:57:26,105 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 59 transitions, 306 flow [2024-06-20 17:57:26,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:57:26,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:57:26,105 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:57:26,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-20 17:57:26,105 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)] === [2024-06-20 17:57:26,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:57:26,106 INFO L85 PathProgramCache]: Analyzing trace with hash 1006660495, now seen corresponding path program 1 times [2024-06-20 17:57:26,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:57:26,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165172491] [2024-06-20 17:57:26,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:57:26,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:57:26,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:57:26,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:57:26,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:57:26,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165172491] [2024-06-20 17:57:26,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165172491] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:57:26,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:57:26,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 17:57:26,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689688944] [2024-06-20 17:57:26,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:57:26,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 17:57:26,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:57:26,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 17:57:26,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-20 17:57:26,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-20 17:57:26,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 59 transitions, 306 flow. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:57:26,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:57:26,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-20 17:57:26,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:57:26,800 INFO L124 PetriNetUnfolderBase]: 3655/5429 cut-off events. [2024-06-20 17:57:26,800 INFO L125 PetriNetUnfolderBase]: For 7448/7448 co-relation queries the response was YES. [2024-06-20 17:57:26,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16682 conditions, 5429 events. 3655/5429 cut-off events. For 7448/7448 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 30247 event pairs, 1490 based on Foata normal form. 30/5450 useless extension candidates. Maximal degree in co-relation 16662. Up to 4863 conditions per place. [2024-06-20 17:57:26,947 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 63 selfloop transitions, 17 changer transitions 0/90 dead transitions. [2024-06-20 17:57:26,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 90 transitions, 560 flow [2024-06-20 17:57:26,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 17:57:26,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 17:57:26,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 163 transitions. [2024-06-20 17:57:26,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6653061224489796 [2024-06-20 17:57:26,952 INFO L175 Difference]: Start difference. First operand has 61 places, 59 transitions, 306 flow. Second operand 5 states and 163 transitions. [2024-06-20 17:57:26,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 90 transitions, 560 flow [2024-06-20 17:57:26,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 90 transitions, 545 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-06-20 17:57:26,959 INFO L231 Difference]: Finished difference. Result has 65 places, 62 transitions, 362 flow [2024-06-20 17:57:26,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=291, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=362, PETRI_PLACES=65, PETRI_TRANSITIONS=62} [2024-06-20 17:57:26,963 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 13 predicate places. [2024-06-20 17:57:26,964 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 62 transitions, 362 flow [2024-06-20 17:57:26,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:57:26,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:57:26,964 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:57:26,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-20 17:57:26,964 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 17:57:26,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:57:26,965 INFO L85 PathProgramCache]: Analyzing trace with hash -957714512, now seen corresponding path program 1 times [2024-06-20 17:57:26,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:57:26,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095707987] [2024-06-20 17:57:26,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:57:26,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:57:26,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:57:27,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:57:27,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:57:27,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095707987] [2024-06-20 17:57:27,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095707987] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:57:27,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:57:27,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 17:57:27,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389320618] [2024-06-20 17:57:27,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:57:27,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 17:57:27,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:57:27,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 17:57:27,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-20 17:57:27,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-20 17:57:27,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 62 transitions, 362 flow. Second operand has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:57:27,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:57:27,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-20 17:57:27,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:57:27,875 INFO L124 PetriNetUnfolderBase]: 4565/6735 cut-off events. [2024-06-20 17:57:27,876 INFO L125 PetriNetUnfolderBase]: For 12227/12230 co-relation queries the response was YES. [2024-06-20 17:57:27,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21804 conditions, 6735 events. 4565/6735 cut-off events. For 12227/12230 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 37212 event pairs, 1849 based on Foata normal form. 5/6733 useless extension candidates. Maximal degree in co-relation 21782. Up to 6310 conditions per place. [2024-06-20 17:57:27,924 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 71 selfloop transitions, 14 changer transitions 0/94 dead transitions. [2024-06-20 17:57:27,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 94 transitions, 676 flow [2024-06-20 17:57:27,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 17:57:27,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 17:57:27,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 126 transitions. [2024-06-20 17:57:27,926 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2024-06-20 17:57:27,926 INFO L175 Difference]: Start difference. First operand has 65 places, 62 transitions, 362 flow. Second operand 4 states and 126 transitions. [2024-06-20 17:57:27,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 94 transitions, 676 flow [2024-06-20 17:57:27,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 94 transitions, 631 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-20 17:57:27,940 INFO L231 Difference]: Finished difference. Result has 67 places, 75 transitions, 450 flow [2024-06-20 17:57:27,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=323, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=450, PETRI_PLACES=67, PETRI_TRANSITIONS=75} [2024-06-20 17:57:27,942 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 15 predicate places. [2024-06-20 17:57:27,943 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 75 transitions, 450 flow [2024-06-20 17:57:27,943 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) [2024-06-20 17:57:27,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:57:27,943 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:57:27,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-20 17:57:27,943 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)] === [2024-06-20 17:57:27,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:57:27,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1112143450, now seen corresponding path program 1 times [2024-06-20 17:57:27,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:57:27,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078871713] [2024-06-20 17:57:27,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:57:27,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:57:27,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:57:28,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:57:28,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:57:28,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078871713] [2024-06-20 17:57:28,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078871713] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:57:28,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:57:28,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 17:57:28,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793055016] [2024-06-20 17:57:28,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:57:28,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 17:57:28,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:57:28,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 17:57:28,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-20 17:57:28,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-20 17:57:28,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 75 transitions, 450 flow. Second operand has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:57:28,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:57:28,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-20 17:57:28,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:57:28,841 INFO L124 PetriNetUnfolderBase]: 4606/6794 cut-off events. [2024-06-20 17:57:28,841 INFO L125 PetriNetUnfolderBase]: For 18135/18141 co-relation queries the response was YES. [2024-06-20 17:57:28,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24105 conditions, 6794 events. 4606/6794 cut-off events. For 18135/18141 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 37884 event pairs, 1275 based on Foata normal form. 19/6800 useless extension candidates. Maximal degree in co-relation 24081. Up to 5615 conditions per place. [2024-06-20 17:57:28,882 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 83 selfloop transitions, 20 changer transitions 0/112 dead transitions. [2024-06-20 17:57:28,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 112 transitions, 811 flow [2024-06-20 17:57:28,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 17:57:28,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 17:57:28,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 161 transitions. [2024-06-20 17:57:28,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6571428571428571 [2024-06-20 17:57:28,884 INFO L175 Difference]: Start difference. First operand has 67 places, 75 transitions, 450 flow. Second operand 5 states and 161 transitions. [2024-06-20 17:57:28,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 112 transitions, 811 flow [2024-06-20 17:57:28,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 112 transitions, 797 flow, removed 7 selfloop flow, removed 0 redundant places. [2024-06-20 17:57:28,897 INFO L231 Difference]: Finished difference. Result has 72 places, 79 transitions, 529 flow [2024-06-20 17:57:28,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=436, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=529, PETRI_PLACES=72, PETRI_TRANSITIONS=79} [2024-06-20 17:57:28,899 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 20 predicate places. [2024-06-20 17:57:28,899 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 79 transitions, 529 flow [2024-06-20 17:57:28,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:57:28,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:57:28,899 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:57:28,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-20 17:57:28,900 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)] === [2024-06-20 17:57:28,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:57:28,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1638247816, now seen corresponding path program 1 times [2024-06-20 17:57:28,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:57:28,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504972513] [2024-06-20 17:57:28,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:57:28,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:57:28,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:57:29,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:57:29,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:57:29,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504972513] [2024-06-20 17:57:29,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504972513] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:57:29,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:57:29,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 17:57:29,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821596137] [2024-06-20 17:57:29,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:57:29,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 17:57:29,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:57:29,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 17:57:29,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-20 17:57:29,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-20 17:57:29,158 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 79 transitions, 529 flow. Second operand has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:57:29,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:57:29,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-20 17:57:29,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:57:29,751 INFO L124 PetriNetUnfolderBase]: 4567/6763 cut-off events. [2024-06-20 17:57:29,754 INFO L125 PetriNetUnfolderBase]: For 22468/22474 co-relation queries the response was YES. [2024-06-20 17:57:29,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25083 conditions, 6763 events. 4567/6763 cut-off events. For 22468/22474 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 37733 event pairs, 990 based on Foata normal form. 19/6769 useless extension candidates. Maximal degree in co-relation 25056. Up to 5597 conditions per place. [2024-06-20 17:57:29,796 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 80 selfloop transitions, 20 changer transitions 0/109 dead transitions. [2024-06-20 17:57:29,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 109 transitions, 802 flow [2024-06-20 17:57:29,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 17:57:29,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 17:57:29,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 158 transitions. [2024-06-20 17:57:29,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6448979591836734 [2024-06-20 17:57:29,799 INFO L175 Difference]: Start difference. First operand has 72 places, 79 transitions, 529 flow. Second operand 5 states and 158 transitions. [2024-06-20 17:57:29,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 109 transitions, 802 flow [2024-06-20 17:57:29,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 109 transitions, 775 flow, removed 8 selfloop flow, removed 1 redundant places. [2024-06-20 17:57:29,825 INFO L231 Difference]: Finished difference. Result has 75 places, 78 transitions, 535 flow [2024-06-20 17:57:29,825 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=488, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=535, PETRI_PLACES=75, PETRI_TRANSITIONS=78} [2024-06-20 17:57:29,827 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 23 predicate places. [2024-06-20 17:57:29,827 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 78 transitions, 535 flow [2024-06-20 17:57:29,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:57:29,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:57:29,828 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:57:29,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-20 17:57:29,828 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 17:57:29,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:57:29,829 INFO L85 PathProgramCache]: Analyzing trace with hash -1368154938, now seen corresponding path program 1 times [2024-06-20 17:57:29,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:57:29,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508485168] [2024-06-20 17:57:29,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:57:29,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:57:29,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:57:30,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:57:30,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:57:30,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508485168] [2024-06-20 17:57:30,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508485168] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:57:30,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:57:30,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 17:57:30,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173356944] [2024-06-20 17:57:30,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:57:30,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 17:57:30,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:57:30,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 17:57:30,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-20 17:57:30,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-20 17:57:30,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 78 transitions, 535 flow. Second operand has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:57:30,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:57:30,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-20 17:57:30,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:57:30,569 INFO L124 PetriNetUnfolderBase]: 4397/6624 cut-off events. [2024-06-20 17:57:30,569 INFO L125 PetriNetUnfolderBase]: For 25979/25988 co-relation queries the response was YES. [2024-06-20 17:57:30,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25249 conditions, 6624 events. 4397/6624 cut-off events. For 25979/25988 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 38108 event pairs, 1748 based on Foata normal form. 10/6621 useless extension candidates. Maximal degree in co-relation 25220. Up to 5898 conditions per place. [2024-06-20 17:57:30,668 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 73 selfloop transitions, 33 changer transitions 0/118 dead transitions. [2024-06-20 17:57:30,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 118 transitions, 983 flow [2024-06-20 17:57:30,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 17:57:30,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 17:57:30,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 162 transitions. [2024-06-20 17:57:30,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6612244897959184 [2024-06-20 17:57:30,670 INFO L175 Difference]: Start difference. First operand has 75 places, 78 transitions, 535 flow. Second operand 5 states and 162 transitions. [2024-06-20 17:57:30,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 118 transitions, 983 flow [2024-06-20 17:57:30,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 118 transitions, 927 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-20 17:57:30,696 INFO L231 Difference]: Finished difference. Result has 77 places, 93 transitions, 698 flow [2024-06-20 17:57:30,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=479, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=698, PETRI_PLACES=77, PETRI_TRANSITIONS=93} [2024-06-20 17:57:30,697 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 25 predicate places. [2024-06-20 17:57:30,697 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 93 transitions, 698 flow [2024-06-20 17:57:30,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:57:30,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:57:30,698 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:57:30,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-20 17:57:30,698 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 17:57:30,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:57:30,698 INFO L85 PathProgramCache]: Analyzing trace with hash 1034294440, now seen corresponding path program 2 times [2024-06-20 17:57:30,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:57:30,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385700568] [2024-06-20 17:57:30,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:57:30,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:57:30,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:57:30,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:57:30,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:57:30,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385700568] [2024-06-20 17:57:30,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385700568] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:57:30,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:57:30,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 17:57:30,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474599242] [2024-06-20 17:57:30,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:57:30,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 17:57:30,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:57:30,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 17:57:30,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-20 17:57:30,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-20 17:57:30,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 93 transitions, 698 flow. Second operand has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:57:30,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:57:30,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-20 17:57:30,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:57:31,424 INFO L124 PetriNetUnfolderBase]: 4452/6723 cut-off events. [2024-06-20 17:57:31,424 INFO L125 PetriNetUnfolderBase]: For 33232/33244 co-relation queries the response was YES. [2024-06-20 17:57:31,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27927 conditions, 6723 events. 4452/6723 cut-off events. For 33232/33244 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 38647 event pairs, 1730 based on Foata normal form. 12/6729 useless extension candidates. Maximal degree in co-relation 27896. Up to 6020 conditions per place. [2024-06-20 17:57:31,472 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 88 selfloop transitions, 31 changer transitions 0/131 dead transitions. [2024-06-20 17:57:31,473 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 131 transitions, 1135 flow [2024-06-20 17:57:31,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 17:57:31,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 17:57:31,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 165 transitions. [2024-06-20 17:57:31,474 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.673469387755102 [2024-06-20 17:57:31,474 INFO L175 Difference]: Start difference. First operand has 77 places, 93 transitions, 698 flow. Second operand 5 states and 165 transitions. [2024-06-20 17:57:31,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 131 transitions, 1135 flow [2024-06-20 17:57:31,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 131 transitions, 1103 flow, removed 16 selfloop flow, removed 0 redundant places. [2024-06-20 17:57:31,526 INFO L231 Difference]: Finished difference. Result has 83 places, 102 transitions, 869 flow [2024-06-20 17:57:31,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=668, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=869, PETRI_PLACES=83, PETRI_TRANSITIONS=102} [2024-06-20 17:57:31,526 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 31 predicate places. [2024-06-20 17:57:31,526 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 102 transitions, 869 flow [2024-06-20 17:57:31,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:57:31,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:57:31,527 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:57:31,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-20 17:57:31,527 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)] === [2024-06-20 17:57:31,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:57:31,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1566017158, now seen corresponding path program 1 times [2024-06-20 17:57:31,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:57:31,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206108597] [2024-06-20 17:57:31,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:57:31,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:57:31,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:57:31,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:57:31,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:57:31,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206108597] [2024-06-20 17:57:31,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206108597] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:57:31,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:57:31,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 17:57:31,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133835390] [2024-06-20 17:57:31,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:57:31,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 17:57:31,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:57:31,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 17:57:31,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 17:57:31,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-20 17:57:31,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 102 transitions, 869 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:57:31,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:57:31,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-20 17:57:31,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:57:32,433 INFO L124 PetriNetUnfolderBase]: 4700/6991 cut-off events. [2024-06-20 17:57:32,433 INFO L125 PetriNetUnfolderBase]: For 38876/38905 co-relation queries the response was YES. [2024-06-20 17:57:32,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29533 conditions, 6991 events. 4700/6991 cut-off events. For 38876/38905 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 39520 event pairs, 1793 based on Foata normal form. 24/6997 useless extension candidates. Maximal degree in co-relation 29498. Up to 6271 conditions per place. [2024-06-20 17:57:32,489 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 83 selfloop transitions, 44 changer transitions 0/136 dead transitions. [2024-06-20 17:57:32,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 136 transitions, 1330 flow [2024-06-20 17:57:32,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 17:57:32,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 17:57:32,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 162 transitions. [2024-06-20 17:57:32,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6612244897959184 [2024-06-20 17:57:32,491 INFO L175 Difference]: Start difference. First operand has 83 places, 102 transitions, 869 flow. Second operand 5 states and 162 transitions. [2024-06-20 17:57:32,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 136 transitions, 1330 flow [2024-06-20 17:57:32,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 136 transitions, 1260 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-20 17:57:32,563 INFO L231 Difference]: Finished difference. Result has 85 places, 106 transitions, 953 flow [2024-06-20 17:57:32,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=807, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=953, PETRI_PLACES=85, PETRI_TRANSITIONS=106} [2024-06-20 17:57:32,564 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 33 predicate places. [2024-06-20 17:57:32,564 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 106 transitions, 953 flow [2024-06-20 17:57:32,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:57:32,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:57:32,564 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:57:32,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-20 17:57:32,565 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 17:57:32,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:57:32,565 INFO L85 PathProgramCache]: Analyzing trace with hash 2040553880, now seen corresponding path program 2 times [2024-06-20 17:57:32,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:57:32,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116252548] [2024-06-20 17:57:32,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:57:32,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:57:32,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:57:32,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:57:32,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:57:32,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116252548] [2024-06-20 17:57:32,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116252548] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:57:32,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:57:32,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 17:57:32,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614316579] [2024-06-20 17:57:32,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:57:32,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 17:57:32,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:57:32,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 17:57:32,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-20 17:57:32,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-20 17:57:32,862 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 106 transitions, 953 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:57:32,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:57:32,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-20 17:57:32,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:57:33,507 INFO L124 PetriNetUnfolderBase]: 4681/6980 cut-off events. [2024-06-20 17:57:33,508 INFO L125 PetriNetUnfolderBase]: For 37988/38008 co-relation queries the response was YES. [2024-06-20 17:57:33,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29398 conditions, 6980 events. 4681/6980 cut-off events. For 37988/38008 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 39556 event pairs, 1744 based on Foata normal form. 18/6991 useless extension candidates. Maximal degree in co-relation 29363. Up to 6324 conditions per place. [2024-06-20 17:57:33,556 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 95 selfloop transitions, 31 changer transitions 0/135 dead transitions. [2024-06-20 17:57:33,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 135 transitions, 1284 flow [2024-06-20 17:57:33,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 17:57:33,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 17:57:33,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 161 transitions. [2024-06-20 17:57:33,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6571428571428571 [2024-06-20 17:57:33,580 INFO L175 Difference]: Start difference. First operand has 85 places, 106 transitions, 953 flow. Second operand 5 states and 161 transitions. [2024-06-20 17:57:33,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 135 transitions, 1284 flow [2024-06-20 17:57:33,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 135 transitions, 1137 flow, removed 27 selfloop flow, removed 3 redundant places. [2024-06-20 17:57:33,756 INFO L231 Difference]: Finished difference. Result has 87 places, 106 transitions, 886 flow [2024-06-20 17:57:33,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=806, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=886, PETRI_PLACES=87, PETRI_TRANSITIONS=106} [2024-06-20 17:57:33,757 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 35 predicate places. [2024-06-20 17:57:33,757 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 106 transitions, 886 flow [2024-06-20 17:57:33,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:57:33,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:57:33,758 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:57:33,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-20 17:57:33,758 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)] === [2024-06-20 17:57:33,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:57:33,758 INFO L85 PathProgramCache]: Analyzing trace with hash 2040554221, now seen corresponding path program 1 times [2024-06-20 17:57:33,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:57:33,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778112623] [2024-06-20 17:57:33,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:57:33,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:57:33,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:57:33,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:57:33,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:57:33,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778112623] [2024-06-20 17:57:33,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778112623] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:57:33,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:57:33,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 17:57:33,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988324168] [2024-06-20 17:57:33,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:57:33,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 17:57:33,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:57:33,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 17:57:33,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 17:57:33,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-20 17:57:33,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 106 transitions, 886 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:57:33,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:57:33,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-20 17:57:33,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:57:34,508 INFO L124 PetriNetUnfolderBase]: 4740/7036 cut-off events. [2024-06-20 17:57:34,508 INFO L125 PetriNetUnfolderBase]: For 41737/41757 co-relation queries the response was YES. [2024-06-20 17:57:34,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30075 conditions, 7036 events. 4740/7036 cut-off events. For 41737/41757 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 39474 event pairs, 1735 based on Foata normal form. 17/7046 useless extension candidates. Maximal degree in co-relation 30040. Up to 6483 conditions per place. [2024-06-20 17:57:34,554 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 94 selfloop transitions, 31 changer transitions 0/134 dead transitions. [2024-06-20 17:57:34,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 134 transitions, 1293 flow [2024-06-20 17:57:34,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 17:57:34,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 17:57:34,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 150 transitions. [2024-06-20 17:57:34,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6122448979591837 [2024-06-20 17:57:34,556 INFO L175 Difference]: Start difference. First operand has 87 places, 106 transitions, 886 flow. Second operand 5 states and 150 transitions. [2024-06-20 17:57:34,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 134 transitions, 1293 flow [2024-06-20 17:57:34,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 134 transitions, 1231 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-20 17:57:34,614 INFO L231 Difference]: Finished difference. Result has 89 places, 117 transitions, 1017 flow [2024-06-20 17:57:34,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=824, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1017, PETRI_PLACES=89, PETRI_TRANSITIONS=117} [2024-06-20 17:57:34,614 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 37 predicate places. [2024-06-20 17:57:34,615 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 117 transitions, 1017 flow [2024-06-20 17:57:34,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:57:34,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:57:34,615 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:57:34,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-20 17:57:34,615 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)] === [2024-06-20 17:57:34,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:57:34,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1998559149, now seen corresponding path program 2 times [2024-06-20 17:57:34,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:57:34,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335434405] [2024-06-20 17:57:34,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:57:34,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:57:34,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:57:34,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:57:34,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:57:34,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335434405] [2024-06-20 17:57:34,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335434405] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:57:34,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:57:34,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 17:57:34,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473431576] [2024-06-20 17:57:34,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:57:34,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 17:57:34,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:57:34,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 17:57:34,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 17:57:34,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-20 17:57:34,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 117 transitions, 1017 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:57:34,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:57:34,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-20 17:57:34,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:57:35,360 INFO L124 PetriNetUnfolderBase]: 4754/7037 cut-off events. [2024-06-20 17:57:35,360 INFO L125 PetriNetUnfolderBase]: For 50596/50619 co-relation queries the response was YES. [2024-06-20 17:57:35,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32364 conditions, 7037 events. 4754/7037 cut-off events. For 50596/50619 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 39284 event pairs, 1749 based on Foata normal form. 19/7043 useless extension candidates. Maximal degree in co-relation 32327. Up to 6463 conditions per place. [2024-06-20 17:57:35,409 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 101 selfloop transitions, 42 changer transitions 0/152 dead transitions. [2024-06-20 17:57:35,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 152 transitions, 1547 flow [2024-06-20 17:57:35,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 17:57:35,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 17:57:35,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 154 transitions. [2024-06-20 17:57:35,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6285714285714286 [2024-06-20 17:57:35,412 INFO L175 Difference]: Start difference. First operand has 89 places, 117 transitions, 1017 flow. Second operand 5 states and 154 transitions. [2024-06-20 17:57:35,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 152 transitions, 1547 flow [2024-06-20 17:57:35,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 152 transitions, 1504 flow, removed 16 selfloop flow, removed 1 redundant places. [2024-06-20 17:57:35,486 INFO L231 Difference]: Finished difference. Result has 94 places, 131 transitions, 1242 flow [2024-06-20 17:57:35,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=974, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1242, PETRI_PLACES=94, PETRI_TRANSITIONS=131} [2024-06-20 17:57:35,488 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 42 predicate places. [2024-06-20 17:57:35,488 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 131 transitions, 1242 flow [2024-06-20 17:57:35,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:57:35,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:57:35,488 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:57:35,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-20 17:57:35,488 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)] === [2024-06-20 17:57:35,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:57:35,489 INFO L85 PathProgramCache]: Analyzing trace with hash 1825918293, now seen corresponding path program 1 times [2024-06-20 17:57:35,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:57:35,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424833637] [2024-06-20 17:57:35,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:57:35,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:57:35,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:57:35,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:57:35,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:57:35,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424833637] [2024-06-20 17:57:35,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424833637] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:57:35,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:57:35,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 17:57:35,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567450162] [2024-06-20 17:57:35,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:57:35,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 17:57:35,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:57:35,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 17:57:35,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 17:57:35,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-20 17:57:35,685 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 131 transitions, 1242 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:57:35,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:57:35,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-20 17:57:35,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:57:36,361 INFO L124 PetriNetUnfolderBase]: 4802/7181 cut-off events. [2024-06-20 17:57:36,362 INFO L125 PetriNetUnfolderBase]: For 61748/61748 co-relation queries the response was YES. [2024-06-20 17:57:36,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35155 conditions, 7181 events. 4802/7181 cut-off events. For 61748/61748 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 40606 event pairs, 1719 based on Foata normal form. 3/7175 useless extension candidates. Maximal degree in co-relation 35115. Up to 6525 conditions per place. [2024-06-20 17:57:36,413 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 149 selfloop transitions, 32 changer transitions 0/190 dead transitions. [2024-06-20 17:57:36,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 190 transitions, 2048 flow [2024-06-20 17:57:36,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:57:36,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:57:36,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 186 transitions. [2024-06-20 17:57:36,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6326530612244898 [2024-06-20 17:57:36,415 INFO L175 Difference]: Start difference. First operand has 94 places, 131 transitions, 1242 flow. Second operand 6 states and 186 transitions. [2024-06-20 17:57:36,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 190 transitions, 2048 flow [2024-06-20 17:57:36,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 190 transitions, 1968 flow, removed 40 selfloop flow, removed 0 redundant places. [2024-06-20 17:57:36,508 INFO L231 Difference]: Finished difference. Result has 102 places, 151 transitions, 1449 flow [2024-06-20 17:57:36,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1182, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1449, PETRI_PLACES=102, PETRI_TRANSITIONS=151} [2024-06-20 17:57:36,509 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 50 predicate places. [2024-06-20 17:57:36,509 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 151 transitions, 1449 flow [2024-06-20 17:57:36,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:57:36,510 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:57:36,510 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:57:36,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-20 17:57:36,510 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)] === [2024-06-20 17:57:36,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:57:36,511 INFO L85 PathProgramCache]: Analyzing trace with hash 1998565101, now seen corresponding path program 2 times [2024-06-20 17:57:36,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:57:36,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464417187] [2024-06-20 17:57:36,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:57:36,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:57:36,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:57:36,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:57:36,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:57:36,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464417187] [2024-06-20 17:57:36,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464417187] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:57:36,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:57:36,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 17:57:36,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682332582] [2024-06-20 17:57:36,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:57:36,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 17:57:36,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:57:36,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 17:57:36,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 17:57:36,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-20 17:57:36,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 151 transitions, 1449 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:57:36,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:57:36,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-20 17:57:36,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:57:37,440 INFO L124 PetriNetUnfolderBase]: 4839/7240 cut-off events. [2024-06-20 17:57:37,440 INFO L125 PetriNetUnfolderBase]: For 67912/67921 co-relation queries the response was YES. [2024-06-20 17:57:37,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36369 conditions, 7240 events. 4839/7240 cut-off events. For 67912/67921 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 41079 event pairs, 1715 based on Foata normal form. 9/7242 useless extension candidates. Maximal degree in co-relation 36324. Up to 6597 conditions per place. [2024-06-20 17:57:37,494 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 158 selfloop transitions, 35 changer transitions 0/202 dead transitions. [2024-06-20 17:57:37,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 202 transitions, 2222 flow [2024-06-20 17:57:37,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:57:37,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:57:37,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 211 transitions. [2024-06-20 17:57:37,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6151603498542274 [2024-06-20 17:57:37,496 INFO L175 Difference]: Start difference. First operand has 102 places, 151 transitions, 1449 flow. Second operand 7 states and 211 transitions. [2024-06-20 17:57:37,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 202 transitions, 2222 flow [2024-06-20 17:57:37,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 202 transitions, 2134 flow, removed 38 selfloop flow, removed 1 redundant places. [2024-06-20 17:57:37,587 INFO L231 Difference]: Finished difference. Result has 109 places, 163 transitions, 1590 flow [2024-06-20 17:57:37,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1381, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1590, PETRI_PLACES=109, PETRI_TRANSITIONS=163} [2024-06-20 17:57:37,587 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 57 predicate places. [2024-06-20 17:57:37,588 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 163 transitions, 1590 flow [2024-06-20 17:57:37,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:57:37,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:57:37,588 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:57:37,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-20 17:57:37,588 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)] === [2024-06-20 17:57:37,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:57:37,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1998357711, now seen corresponding path program 3 times [2024-06-20 17:57:37,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:57:37,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994593280] [2024-06-20 17:57:37,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:57:37,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:57:37,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:57:37,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:57:37,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:57:37,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994593280] [2024-06-20 17:57:37,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994593280] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:57:37,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:57:37,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 17:57:37,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776467231] [2024-06-20 17:57:37,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:57:37,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 17:57:37,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:57:37,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 17:57:37,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 17:57:37,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-20 17:57:37,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 163 transitions, 1590 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:57:37,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:57:37,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-20 17:57:37,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:57:38,552 INFO L124 PetriNetUnfolderBase]: 4831/7229 cut-off events. [2024-06-20 17:57:38,553 INFO L125 PetriNetUnfolderBase]: For 76855/76855 co-relation queries the response was YES. [2024-06-20 17:57:38,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37340 conditions, 7229 events. 4831/7229 cut-off events. For 76855/76855 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 40938 event pairs, 1720 based on Foata normal form. 3/7223 useless extension candidates. Maximal degree in co-relation 37292. Up to 6591 conditions per place. [2024-06-20 17:57:38,600 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 152 selfloop transitions, 31 changer transitions 0/192 dead transitions. [2024-06-20 17:57:38,601 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 192 transitions, 2139 flow [2024-06-20 17:57:38,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 17:57:38,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 17:57:38,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 157 transitions. [2024-06-20 17:57:38,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6408163265306123 [2024-06-20 17:57:38,602 INFO L175 Difference]: Start difference. First operand has 109 places, 163 transitions, 1590 flow. Second operand 5 states and 157 transitions. [2024-06-20 17:57:38,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 192 transitions, 2139 flow [2024-06-20 17:57:38,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 192 transitions, 2049 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-20 17:57:38,720 INFO L231 Difference]: Finished difference. Result has 111 places, 163 transitions, 1573 flow [2024-06-20 17:57:38,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1500, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1573, PETRI_PLACES=111, PETRI_TRANSITIONS=163} [2024-06-20 17:57:38,721 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 59 predicate places. [2024-06-20 17:57:38,721 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 163 transitions, 1573 flow [2024-06-20 17:57:38,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:57:38,721 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:57:38,722 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:57:38,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-20 17:57:38,722 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)] === [2024-06-20 17:57:38,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:57:38,722 INFO L85 PathProgramCache]: Analyzing trace with hash 1998573037, now seen corresponding path program 1 times [2024-06-20 17:57:38,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:57:38,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128624200] [2024-06-20 17:57:38,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:57:38,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:57:38,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:57:38,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:57:38,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:57:38,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128624200] [2024-06-20 17:57:38,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128624200] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:57:38,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:57:38,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 17:57:38,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109376914] [2024-06-20 17:57:38,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:57:38,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 17:57:38,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:57:38,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 17:57:38,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 17:57:38,965 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-20 17:57:38,966 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 163 transitions, 1573 flow. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:57:38,966 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:57:38,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-20 17:57:38,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:57:39,612 INFO L124 PetriNetUnfolderBase]: 4881/7298 cut-off events. [2024-06-20 17:57:39,612 INFO L125 PetriNetUnfolderBase]: For 84365/84371 co-relation queries the response was YES. [2024-06-20 17:57:39,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38168 conditions, 7298 events. 4881/7298 cut-off events. For 84365/84371 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 41356 event pairs, 1709 based on Foata normal form. 16/7307 useless extension candidates. Maximal degree in co-relation 38118. Up to 6672 conditions per place. [2024-06-20 17:57:39,673 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 166 selfloop transitions, 18 changer transitions 0/193 dead transitions. [2024-06-20 17:57:39,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 193 transitions, 2129 flow [2024-06-20 17:57:39,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 17:57:39,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 17:57:39,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 153 transitions. [2024-06-20 17:57:39,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6244897959183674 [2024-06-20 17:57:39,675 INFO L175 Difference]: Start difference. First operand has 111 places, 163 transitions, 1573 flow. Second operand 5 states and 153 transitions. [2024-06-20 17:57:39,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 193 transitions, 2129 flow [2024-06-20 17:57:39,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 193 transitions, 2067 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-20 17:57:39,817 INFO L231 Difference]: Finished difference. Result has 112 places, 166 transitions, 1606 flow [2024-06-20 17:57:39,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1511, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1606, PETRI_PLACES=112, PETRI_TRANSITIONS=166} [2024-06-20 17:57:39,817 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 60 predicate places. [2024-06-20 17:57:39,818 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 166 transitions, 1606 flow [2024-06-20 17:57:39,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:57:39,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:57:39,818 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:57:39,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-20 17:57:39,818 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)] === [2024-06-20 17:57:39,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:57:39,819 INFO L85 PathProgramCache]: Analyzing trace with hash -1997772327, now seen corresponding path program 1 times [2024-06-20 17:57:39,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:57:39,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379396237] [2024-06-20 17:57:39,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:57:39,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:57:39,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:57:39,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:57:39,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:57:39,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379396237] [2024-06-20 17:57:39,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379396237] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:57:39,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:57:39,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-20 17:57:39,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811531853] [2024-06-20 17:57:39,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:57:39,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-20 17:57:39,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:57:39,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-20 17:57:39,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-20 17:57:40,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-20 17:57:40,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 166 transitions, 1606 flow. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:57:40,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:57:40,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-20 17:57:40,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:57:40,629 INFO L124 PetriNetUnfolderBase]: 4603/6896 cut-off events. [2024-06-20 17:57:40,630 INFO L125 PetriNetUnfolderBase]: For 99668/99700 co-relation queries the response was YES. [2024-06-20 17:57:40,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37950 conditions, 6896 events. 4603/6896 cut-off events. For 99668/99700 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 39683 event pairs, 1625 based on Foata normal form. 8/6769 useless extension candidates. Maximal degree in co-relation 37899. Up to 6211 conditions per place. [2024-06-20 17:57:40,682 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 144 selfloop transitions, 16 changer transitions 0/179 dead transitions. [2024-06-20 17:57:40,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 179 transitions, 1978 flow [2024-06-20 17:57:40,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 17:57:40,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 17:57:40,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 122 transitions. [2024-06-20 17:57:40,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6224489795918368 [2024-06-20 17:57:40,684 INFO L175 Difference]: Start difference. First operand has 112 places, 166 transitions, 1606 flow. Second operand 4 states and 122 transitions. [2024-06-20 17:57:40,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 179 transitions, 1978 flow [2024-06-20 17:57:40,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 179 transitions, 1915 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-20 17:57:40,825 INFO L231 Difference]: Finished difference. Result has 114 places, 168 transitions, 1625 flow [2024-06-20 17:57:40,825 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1543, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1625, PETRI_PLACES=114, PETRI_TRANSITIONS=168} [2024-06-20 17:57:40,826 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 62 predicate places. [2024-06-20 17:57:40,826 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 168 transitions, 1625 flow [2024-06-20 17:57:40,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:57:40,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:57:40,826 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:57:40,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-20 17:57:40,826 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 17:57:40,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:57:40,827 INFO L85 PathProgramCache]: Analyzing trace with hash -1301890499, now seen corresponding path program 1 times [2024-06-20 17:57:40,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:57:40,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200064839] [2024-06-20 17:57:40,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:57:40,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:57:40,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:57:40,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:57:40,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:57:40,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200064839] [2024-06-20 17:57:40,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200064839] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:57:40,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:57:40,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:57:40,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194428742] [2024-06-20 17:57:40,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:57:40,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:57:40,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:57:40,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:57:40,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:57:41,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-20 17:57:41,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 168 transitions, 1625 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:57:41,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:57:41,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-20 17:57:41,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:57:41,781 INFO L124 PetriNetUnfolderBase]: 5162/7712 cut-off events. [2024-06-20 17:57:41,781 INFO L125 PetriNetUnfolderBase]: For 104655/104678 co-relation queries the response was YES. [2024-06-20 17:57:41,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41852 conditions, 7712 events. 5162/7712 cut-off events. For 104655/104678 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 44271 event pairs, 1717 based on Foata normal form. 22/7716 useless extension candidates. Maximal degree in co-relation 41799. Up to 6479 conditions per place. [2024-06-20 17:57:41,844 INFO L140 encePairwiseOnDemand]: 36/49 looper letters, 129 selfloop transitions, 106 changer transitions 0/244 dead transitions. [2024-06-20 17:57:41,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 244 transitions, 2851 flow [2024-06-20 17:57:41,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:57:41,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:57:41,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 278 transitions. [2024-06-20 17:57:41,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6303854875283447 [2024-06-20 17:57:41,846 INFO L175 Difference]: Start difference. First operand has 114 places, 168 transitions, 1625 flow. Second operand 9 states and 278 transitions. [2024-06-20 17:57:41,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 244 transitions, 2851 flow [2024-06-20 17:57:42,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 244 transitions, 2833 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-06-20 17:57:42,012 INFO L231 Difference]: Finished difference. Result has 125 places, 193 transitions, 2171 flow [2024-06-20 17:57:42,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1607, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2171, PETRI_PLACES=125, PETRI_TRANSITIONS=193} [2024-06-20 17:57:42,015 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 73 predicate places. [2024-06-20 17:57:42,015 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 193 transitions, 2171 flow [2024-06-20 17:57:42,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:57:42,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:57:42,016 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:57:42,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-20 17:57:42,016 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 17:57:42,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:57:42,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1167338017, now seen corresponding path program 2 times [2024-06-20 17:57:42,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:57:42,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245432971] [2024-06-20 17:57:42,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:57:42,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:57:42,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:57:42,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:57:42,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:57:42,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245432971] [2024-06-20 17:57:42,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245432971] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:57:42,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:57:42,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:57:42,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787262824] [2024-06-20 17:57:42,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:57:42,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:57:42,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:57:42,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:57:42,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:57:42,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-20 17:57:42,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 193 transitions, 2171 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:57:42,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:57:42,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-20 17:57:42,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:57:43,175 INFO L124 PetriNetUnfolderBase]: 5447/8161 cut-off events. [2024-06-20 17:57:43,175 INFO L125 PetriNetUnfolderBase]: For 128557/128577 co-relation queries the response was YES. [2024-06-20 17:57:43,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49027 conditions, 8161 events. 5447/8161 cut-off events. For 128557/128577 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 47199 event pairs, 1724 based on Foata normal form. 20/8174 useless extension candidates. Maximal degree in co-relation 48969. Up to 7040 conditions per place. [2024-06-20 17:57:43,252 INFO L140 encePairwiseOnDemand]: 36/49 looper letters, 182 selfloop transitions, 80 changer transitions 0/271 dead transitions. [2024-06-20 17:57:43,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 271 transitions, 3527 flow [2024-06-20 17:57:43,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:57:43,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:57:43,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 226 transitions. [2024-06-20 17:57:43,254 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6588921282798834 [2024-06-20 17:57:43,254 INFO L175 Difference]: Start difference. First operand has 125 places, 193 transitions, 2171 flow. Second operand 7 states and 226 transitions. [2024-06-20 17:57:43,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 271 transitions, 3527 flow [2024-06-20 17:57:43,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 271 transitions, 3295 flow, removed 77 selfloop flow, removed 3 redundant places. [2024-06-20 17:57:43,534 INFO L231 Difference]: Finished difference. Result has 131 places, 222 transitions, 2621 flow [2024-06-20 17:57:43,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=1993, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2621, PETRI_PLACES=131, PETRI_TRANSITIONS=222} [2024-06-20 17:57:43,535 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 79 predicate places. [2024-06-20 17:57:43,535 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 222 transitions, 2621 flow [2024-06-20 17:57:43,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:57:43,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:57:43,535 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:57:43,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-20 17:57:43,535 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 17:57:43,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:57:43,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1167327787, now seen corresponding path program 3 times [2024-06-20 17:57:43,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:57:43,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346139620] [2024-06-20 17:57:43,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:57:43,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:57:43,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:57:43,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:57:43,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:57:43,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346139620] [2024-06-20 17:57:43,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346139620] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:57:43,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:57:43,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:57:43,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731971408] [2024-06-20 17:57:43,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:57:43,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:57:43,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:57:43,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:57:43,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:57:43,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-20 17:57:43,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 222 transitions, 2621 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:57:43,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:57:43,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-20 17:57:43,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:57:44,748 INFO L124 PetriNetUnfolderBase]: 5480/8215 cut-off events. [2024-06-20 17:57:44,748 INFO L125 PetriNetUnfolderBase]: For 141917/141939 co-relation queries the response was YES. [2024-06-20 17:57:44,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51145 conditions, 8215 events. 5480/8215 cut-off events. For 141917/141939 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 47640 event pairs, 1722 based on Foata normal form. 22/8230 useless extension candidates. Maximal degree in co-relation 51083. Up to 7078 conditions per place. [2024-06-20 17:57:44,824 INFO L140 encePairwiseOnDemand]: 36/49 looper letters, 174 selfloop transitions, 95 changer transitions 0/278 dead transitions. [2024-06-20 17:57:44,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 278 transitions, 3696 flow [2024-06-20 17:57:44,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:57:44,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:57:44,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 246 transitions. [2024-06-20 17:57:44,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6275510204081632 [2024-06-20 17:57:44,826 INFO L175 Difference]: Start difference. First operand has 131 places, 222 transitions, 2621 flow. Second operand 8 states and 246 transitions. [2024-06-20 17:57:44,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 278 transitions, 3696 flow [2024-06-20 17:57:45,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 278 transitions, 3579 flow, removed 41 selfloop flow, removed 2 redundant places. [2024-06-20 17:57:45,167 INFO L231 Difference]: Finished difference. Result has 139 places, 236 transitions, 3013 flow [2024-06-20 17:57:45,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2516, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3013, PETRI_PLACES=139, PETRI_TRANSITIONS=236} [2024-06-20 17:57:45,168 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 87 predicate places. [2024-06-20 17:57:45,168 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 236 transitions, 3013 flow [2024-06-20 17:57:45,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:57:45,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:57:45,168 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:57:45,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-20 17:57:45,169 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 17:57:45,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:57:45,169 INFO L85 PathProgramCache]: Analyzing trace with hash 1894796869, now seen corresponding path program 4 times [2024-06-20 17:57:45,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:57:45,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668585514] [2024-06-20 17:57:45,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:57:45,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:57:45,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:57:45,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:57:45,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:57:45,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668585514] [2024-06-20 17:57:45,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668585514] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:57:45,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:57:45,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:57:45,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979123049] [2024-06-20 17:57:45,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:57:45,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:57:45,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:57:45,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:57:45,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:57:45,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-20 17:57:45,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 236 transitions, 3013 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:57:45,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:57:45,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-20 17:57:45,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:57:46,384 INFO L124 PetriNetUnfolderBase]: 5790/8677 cut-off events. [2024-06-20 17:57:46,384 INFO L125 PetriNetUnfolderBase]: For 164305/164327 co-relation queries the response was YES. [2024-06-20 17:57:46,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56001 conditions, 8677 events. 5790/8677 cut-off events. For 164305/164327 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 50698 event pairs, 1726 based on Foata normal form. 22/8686 useless extension candidates. Maximal degree in co-relation 55935. Up to 7145 conditions per place. [2024-06-20 17:57:46,468 INFO L140 encePairwiseOnDemand]: 36/49 looper letters, 170 selfloop transitions, 148 changer transitions 0/327 dead transitions. [2024-06-20 17:57:46,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 327 transitions, 4621 flow [2024-06-20 17:57:46,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:57:46,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:57:46,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 279 transitions. [2024-06-20 17:57:46,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6326530612244898 [2024-06-20 17:57:46,469 INFO L175 Difference]: Start difference. First operand has 139 places, 236 transitions, 3013 flow. Second operand 9 states and 279 transitions. [2024-06-20 17:57:46,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 327 transitions, 4621 flow [2024-06-20 17:57:46,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 327 transitions, 4498 flow, removed 40 selfloop flow, removed 3 redundant places. [2024-06-20 17:57:46,825 INFO L231 Difference]: Finished difference. Result has 147 places, 273 transitions, 3776 flow [2024-06-20 17:57:46,825 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2898, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3776, PETRI_PLACES=147, PETRI_TRANSITIONS=273} [2024-06-20 17:57:46,826 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 95 predicate places. [2024-06-20 17:57:46,826 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 273 transitions, 3776 flow [2024-06-20 17:57:46,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:57:46,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:57:46,826 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:57:46,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-20 17:57:46,827 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 17:57:46,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:57:46,827 INFO L85 PathProgramCache]: Analyzing trace with hash 766031489, now seen corresponding path program 1 times [2024-06-20 17:57:46,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:57:46,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385327668] [2024-06-20 17:57:46,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:57:46,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:57:46,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:57:47,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:57:47,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:57:47,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385327668] [2024-06-20 17:57:47,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385327668] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:57:47,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:57:47,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 17:57:47,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765362413] [2024-06-20 17:57:47,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:57:47,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 17:57:47,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:57:47,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 17:57:47,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-20 17:57:47,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-20 17:57:47,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 273 transitions, 3776 flow. Second operand has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:57:47,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:57:47,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-20 17:57:47,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:57:48,111 INFO L124 PetriNetUnfolderBase]: 5928/8844 cut-off events. [2024-06-20 17:57:48,111 INFO L125 PetriNetUnfolderBase]: For 204726/204754 co-relation queries the response was YES. [2024-06-20 17:57:48,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62099 conditions, 8844 events. 5928/8844 cut-off events. For 204726/204754 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 52071 event pairs, 1488 based on Foata normal form. 29/8840 useless extension candidates. Maximal degree in co-relation 62029. Up to 7108 conditions per place. [2024-06-20 17:57:48,208 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 229 selfloop transitions, 71 changer transitions 0/321 dead transitions. [2024-06-20 17:57:48,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 321 transitions, 4898 flow [2024-06-20 17:57:48,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:57:48,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:57:48,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 199 transitions. [2024-06-20 17:57:48,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6768707482993197 [2024-06-20 17:57:48,211 INFO L175 Difference]: Start difference. First operand has 147 places, 273 transitions, 3776 flow. Second operand 6 states and 199 transitions. [2024-06-20 17:57:48,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 321 transitions, 4898 flow [2024-06-20 17:57:48,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 321 transitions, 4689 flow, removed 79 selfloop flow, removed 3 redundant places. [2024-06-20 17:57:48,639 INFO L231 Difference]: Finished difference. Result has 150 places, 279 transitions, 3851 flow [2024-06-20 17:57:48,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3575, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3851, PETRI_PLACES=150, PETRI_TRANSITIONS=279} [2024-06-20 17:57:48,640 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 98 predicate places. [2024-06-20 17:57:48,640 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 279 transitions, 3851 flow [2024-06-20 17:57:48,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:57:48,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:57:48,640 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:57:48,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-20 17:57:48,640 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)] === [2024-06-20 17:57:48,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:57:48,641 INFO L85 PathProgramCache]: Analyzing trace with hash -91723291, now seen corresponding path program 2 times [2024-06-20 17:57:48,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:57:48,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306835543] [2024-06-20 17:57:48,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:57:48,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:57:48,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:57:48,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:57:48,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:57:48,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306835543] [2024-06-20 17:57:48,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306835543] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:57:48,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:57:48,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 17:57:48,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847536557] [2024-06-20 17:57:48,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:57:48,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 17:57:48,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:57:48,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 17:57:48,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 17:57:48,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-20 17:57:48,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 279 transitions, 3851 flow. Second operand has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:57:48,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:57:48,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-20 17:57:48,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:57:49,980 INFO L124 PetriNetUnfolderBase]: 6071/9042 cut-off events. [2024-06-20 17:57:49,980 INFO L125 PetriNetUnfolderBase]: For 220392/220420 co-relation queries the response was YES. [2024-06-20 17:57:50,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64188 conditions, 9042 events. 6071/9042 cut-off events. For 220392/220420 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 53310 event pairs, 1770 based on Foata normal form. 29/9038 useless extension candidates. Maximal degree in co-relation 64116. Up to 7781 conditions per place. [2024-06-20 17:57:50,099 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 226 selfloop transitions, 68 changer transitions 0/315 dead transitions. [2024-06-20 17:57:50,100 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 315 transitions, 4783 flow [2024-06-20 17:57:50,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:57:50,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:57:50,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 191 transitions. [2024-06-20 17:57:50,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6496598639455783 [2024-06-20 17:57:50,101 INFO L175 Difference]: Start difference. First operand has 150 places, 279 transitions, 3851 flow. Second operand 6 states and 191 transitions. [2024-06-20 17:57:50,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 315 transitions, 4783 flow [2024-06-20 17:57:50,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 315 transitions, 4635 flow, removed 37 selfloop flow, removed 2 redundant places. [2024-06-20 17:57:50,554 INFO L231 Difference]: Finished difference. Result has 154 places, 282 transitions, 3921 flow [2024-06-20 17:57:50,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3719, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3921, PETRI_PLACES=154, PETRI_TRANSITIONS=282} [2024-06-20 17:57:50,555 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 102 predicate places. [2024-06-20 17:57:50,555 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 282 transitions, 3921 flow [2024-06-20 17:57:50,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:57:50,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:57:50,555 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:57:50,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-20 17:57:50,555 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)] === [2024-06-20 17:57:50,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:57:50,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1819543111, now seen corresponding path program 3 times [2024-06-20 17:57:50,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:57:50,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821593262] [2024-06-20 17:57:50,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:57:50,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:57:50,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:57:50,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:57:50,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:57:50,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821593262] [2024-06-20 17:57:50,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821593262] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:57:50,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:57:50,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 17:57:50,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146523484] [2024-06-20 17:57:50,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:57:50,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 17:57:50,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:57:50,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 17:57:50,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-20 17:57:50,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-20 17:57:50,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 282 transitions, 3921 flow. Second operand has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:57:50,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:57:50,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-20 17:57:50,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:57:51,884 INFO L124 PetriNetUnfolderBase]: 6145/9170 cut-off events. [2024-06-20 17:57:51,885 INFO L125 PetriNetUnfolderBase]: For 226356/226384 co-relation queries the response was YES. [2024-06-20 17:57:51,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64383 conditions, 9170 events. 6145/9170 cut-off events. For 226356/226384 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 54289 event pairs, 1461 based on Foata normal form. 29/9179 useless extension candidates. Maximal degree in co-relation 64309. Up to 7743 conditions per place. [2024-06-20 17:57:51,997 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 246 selfloop transitions, 55 changer transitions 0/322 dead transitions. [2024-06-20 17:57:51,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 322 transitions, 4681 flow [2024-06-20 17:57:51,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:57:51,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:57:51,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 196 transitions. [2024-06-20 17:57:51,999 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-20 17:57:51,999 INFO L175 Difference]: Start difference. First operand has 154 places, 282 transitions, 3921 flow. Second operand 6 states and 196 transitions. [2024-06-20 17:57:51,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 322 transitions, 4681 flow [2024-06-20 17:57:52,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 322 transitions, 4525 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-20 17:57:52,497 INFO L231 Difference]: Finished difference. Result has 156 places, 284 transitions, 3941 flow [2024-06-20 17:57:52,497 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3765, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3941, PETRI_PLACES=156, PETRI_TRANSITIONS=284} [2024-06-20 17:57:52,497 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 104 predicate places. [2024-06-20 17:57:52,497 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 284 transitions, 3941 flow [2024-06-20 17:57:52,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:57:52,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:57:52,498 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:57:52,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-20 17:57:52,498 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)] === [2024-06-20 17:57:52,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:57:52,499 INFO L85 PathProgramCache]: Analyzing trace with hash -1703905575, now seen corresponding path program 1 times [2024-06-20 17:57:52,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:57:52,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367860329] [2024-06-20 17:57:52,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:57:52,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:57:52,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:57:52,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:57:52,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:57:52,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367860329] [2024-06-20 17:57:52,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367860329] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:57:52,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:57:52,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:57:52,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122677675] [2024-06-20 17:57:52,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:57:52,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:57:52,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:57:52,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:57:52,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:57:52,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-20 17:57:52,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 284 transitions, 3941 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:57:52,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:57:52,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-20 17:57:52,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:57:53,784 INFO L124 PetriNetUnfolderBase]: 6303/9333 cut-off events. [2024-06-20 17:57:53,784 INFO L125 PetriNetUnfolderBase]: For 233579/233607 co-relation queries the response was YES. [2024-06-20 17:57:53,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65871 conditions, 9333 events. 6303/9333 cut-off events. For 233579/233607 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 54700 event pairs, 1800 based on Foata normal form. 22/9336 useless extension candidates. Maximal degree in co-relation 65796. Up to 8365 conditions per place. [2024-06-20 17:57:53,893 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 243 selfloop transitions, 62 changer transitions 0/314 dead transitions. [2024-06-20 17:57:53,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 314 transitions, 4725 flow [2024-06-20 17:57:53,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:57:53,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:57:53,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 185 transitions. [2024-06-20 17:57:53,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6292517006802721 [2024-06-20 17:57:53,895 INFO L175 Difference]: Start difference. First operand has 156 places, 284 transitions, 3941 flow. Second operand 6 states and 185 transitions. [2024-06-20 17:57:53,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 314 transitions, 4725 flow [2024-06-20 17:57:54,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 314 transitions, 4593 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-20 17:57:54,363 INFO L231 Difference]: Finished difference. Result has 158 places, 284 transitions, 3942 flow [2024-06-20 17:57:54,364 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3809, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3942, PETRI_PLACES=158, PETRI_TRANSITIONS=284} [2024-06-20 17:57:54,364 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 106 predicate places. [2024-06-20 17:57:54,364 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 284 transitions, 3942 flow [2024-06-20 17:57:54,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:57:54,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:57:54,365 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:57:54,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-20 17:57:54,365 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)] === [2024-06-20 17:57:54,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:57:54,365 INFO L85 PathProgramCache]: Analyzing trace with hash -1037868265, now seen corresponding path program 1 times [2024-06-20 17:57:54,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:57:54,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956096886] [2024-06-20 17:57:54,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:57:54,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:57:54,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:57:54,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:57:54,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:57:54,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956096886] [2024-06-20 17:57:54,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956096886] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:57:54,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:57:54,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:57:54,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368641851] [2024-06-20 17:57:54,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:57:54,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:57:54,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:57:54,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:57:54,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:57:54,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-20 17:57:54,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 284 transitions, 3942 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:57:54,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:57:54,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-20 17:57:54,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:57:55,885 INFO L124 PetriNetUnfolderBase]: 6570/9743 cut-off events. [2024-06-20 17:57:55,885 INFO L125 PetriNetUnfolderBase]: For 262301/262329 co-relation queries the response was YES. [2024-06-20 17:57:55,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69017 conditions, 9743 events. 6570/9743 cut-off events. For 262301/262329 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 57608 event pairs, 1497 based on Foata normal form. 40/9763 useless extension candidates. Maximal degree in co-relation 68941. Up to 8192 conditions per place. [2024-06-20 17:57:56,010 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 255 selfloop transitions, 69 changer transitions 0/333 dead transitions. [2024-06-20 17:57:56,011 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 333 transitions, 5074 flow [2024-06-20 17:57:56,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:57:56,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:57:56,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 196 transitions. [2024-06-20 17:57:56,012 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-20 17:57:56,012 INFO L175 Difference]: Start difference. First operand has 158 places, 284 transitions, 3942 flow. Second operand 6 states and 196 transitions. [2024-06-20 17:57:56,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 333 transitions, 5074 flow [2024-06-20 17:57:56,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 333 transitions, 4908 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-20 17:57:56,464 INFO L231 Difference]: Finished difference. Result has 159 places, 290 transitions, 4068 flow [2024-06-20 17:57:56,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3776, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4068, PETRI_PLACES=159, PETRI_TRANSITIONS=290} [2024-06-20 17:57:56,465 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 107 predicate places. [2024-06-20 17:57:56,465 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 290 transitions, 4068 flow [2024-06-20 17:57:56,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:57:56,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:57:56,466 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:57:56,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-20 17:57:56,466 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)] === [2024-06-20 17:57:56,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:57:56,466 INFO L85 PathProgramCache]: Analyzing trace with hash -1030249705, now seen corresponding path program 2 times [2024-06-20 17:57:56,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:57:56,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040177978] [2024-06-20 17:57:56,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:57:56,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:57:56,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:57:56,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:57:56,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:57:56,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040177978] [2024-06-20 17:57:56,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040177978] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:57:56,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:57:56,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:57:56,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012282696] [2024-06-20 17:57:56,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:57:56,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:57:56,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:57:56,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:57:56,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:57:56,694 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-20 17:57:56,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 290 transitions, 4068 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:57:56,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:57:56,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-20 17:57:56,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:57:57,909 INFO L124 PetriNetUnfolderBase]: 6695/9918 cut-off events. [2024-06-20 17:57:57,910 INFO L125 PetriNetUnfolderBase]: For 286866/286894 co-relation queries the response was YES. [2024-06-20 17:57:57,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71866 conditions, 9918 events. 6695/9918 cut-off events. For 286866/286894 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 58755 event pairs, 1861 based on Foata normal form. 40/9938 useless extension candidates. Maximal degree in co-relation 71789. Up to 8803 conditions per place. [2024-06-20 17:57:58,021 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 253 selfloop transitions, 65 changer transitions 0/327 dead transitions. [2024-06-20 17:57:58,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 327 transitions, 4988 flow [2024-06-20 17:57:58,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:57:58,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:57:58,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 188 transitions. [2024-06-20 17:57:58,023 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6394557823129252 [2024-06-20 17:57:58,023 INFO L175 Difference]: Start difference. First operand has 159 places, 290 transitions, 4068 flow. Second operand 6 states and 188 transitions. [2024-06-20 17:57:58,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 327 transitions, 4988 flow [2024-06-20 17:57:58,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 327 transitions, 4824 flow, removed 47 selfloop flow, removed 2 redundant places. [2024-06-20 17:57:58,592 INFO L231 Difference]: Finished difference. Result has 163 places, 293 transitions, 4125 flow [2024-06-20 17:57:58,593 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3924, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4125, PETRI_PLACES=163, PETRI_TRANSITIONS=293} [2024-06-20 17:57:58,593 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 111 predicate places. [2024-06-20 17:57:58,593 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 293 transitions, 4125 flow [2024-06-20 17:57:58,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:57:58,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:57:58,594 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:57:58,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-20 17:57:58,594 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)] === [2024-06-20 17:57:58,594 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:57:58,594 INFO L85 PathProgramCache]: Analyzing trace with hash 1027102702, now seen corresponding path program 1 times [2024-06-20 17:57:58,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:57:58,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093985956] [2024-06-20 17:57:58,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:57:58,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:57:58,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:57:58,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:57:58,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:57:58,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093985956] [2024-06-20 17:57:58,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093985956] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:57:58,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:57:58,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:57:58,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138408485] [2024-06-20 17:57:58,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:57:58,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:57:58,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:57:58,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:57:58,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:57:58,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-20 17:57:58,804 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 293 transitions, 4125 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:57:58,804 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:57:58,804 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-20 17:57:58,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:58:00,076 INFO L124 PetriNetUnfolderBase]: 6746/10012 cut-off events. [2024-06-20 17:58:00,076 INFO L125 PetriNetUnfolderBase]: For 286348/286360 co-relation queries the response was YES. [2024-06-20 17:58:00,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72052 conditions, 10012 events. 6746/10012 cut-off events. For 286348/286360 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 59103 event pairs, 1815 based on Foata normal form. 11/10006 useless extension candidates. Maximal degree in co-relation 71973. Up to 8402 conditions per place. [2024-06-20 17:58:00,192 INFO L140 encePairwiseOnDemand]: 36/49 looper letters, 172 selfloop transitions, 174 changer transitions 0/355 dead transitions. [2024-06-20 17:58:00,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 355 transitions, 5697 flow [2024-06-20 17:58:00,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:58:00,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:58:00,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 278 transitions. [2024-06-20 17:58:00,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6303854875283447 [2024-06-20 17:58:00,194 INFO L175 Difference]: Start difference. First operand has 163 places, 293 transitions, 4125 flow. Second operand 9 states and 278 transitions. [2024-06-20 17:58:00,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 355 transitions, 5697 flow [2024-06-20 17:58:00,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 355 transitions, 5538 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-20 17:58:00,847 INFO L231 Difference]: Finished difference. Result has 170 places, 306 transitions, 4623 flow [2024-06-20 17:58:00,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3966, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4623, PETRI_PLACES=170, PETRI_TRANSITIONS=306} [2024-06-20 17:58:00,848 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 118 predicate places. [2024-06-20 17:58:00,848 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 306 transitions, 4623 flow [2024-06-20 17:58:00,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:58:00,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:58:00,848 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:58:00,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-20 17:58:00,849 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)] === [2024-06-20 17:58:00,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:58:00,849 INFO L85 PathProgramCache]: Analyzing trace with hash -2091908333, now seen corresponding path program 2 times [2024-06-20 17:58:00,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:58:00,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298600416] [2024-06-20 17:58:00,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:58:00,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:58:00,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:58:01,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:58:01,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:58:01,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298600416] [2024-06-20 17:58:01,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298600416] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:58:01,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:58:01,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:58:01,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102580851] [2024-06-20 17:58:01,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:58:01,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:58:01,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:58:01,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:58:01,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:58:01,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-20 17:58:01,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 306 transitions, 4623 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:58:01,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:58:01,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-20 17:58:01,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:58:02,273 INFO L124 PetriNetUnfolderBase]: 6739/9989 cut-off events. [2024-06-20 17:58:02,273 INFO L125 PetriNetUnfolderBase]: For 306710/306722 co-relation queries the response was YES. [2024-06-20 17:58:02,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73917 conditions, 9989 events. 6739/9989 cut-off events. For 306710/306722 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 59150 event pairs, 1825 based on Foata normal form. 7/9980 useless extension candidates. Maximal degree in co-relation 73835. Up to 8972 conditions per place. [2024-06-20 17:58:02,386 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 257 selfloop transitions, 65 changer transitions 0/331 dead transitions. [2024-06-20 17:58:02,386 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 331 transitions, 5331 flow [2024-06-20 17:58:02,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:58:02,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:58:02,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 182 transitions. [2024-06-20 17:58:02,387 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-20 17:58:02,388 INFO L175 Difference]: Start difference. First operand has 170 places, 306 transitions, 4623 flow. Second operand 6 states and 182 transitions. [2024-06-20 17:58:02,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 331 transitions, 5331 flow [2024-06-20 17:58:03,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 331 transitions, 4821 flow, removed 81 selfloop flow, removed 6 redundant places. [2024-06-20 17:58:03,034 INFO L231 Difference]: Finished difference. Result has 170 places, 306 transitions, 4252 flow [2024-06-20 17:58:03,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=4113, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4252, PETRI_PLACES=170, PETRI_TRANSITIONS=306} [2024-06-20 17:58:03,035 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 118 predicate places. [2024-06-20 17:58:03,035 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 306 transitions, 4252 flow [2024-06-20 17:58:03,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:58:03,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:58:03,035 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:58:03,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-20 17:58:03,036 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)] === [2024-06-20 17:58:03,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:58:03,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1827418228, now seen corresponding path program 2 times [2024-06-20 17:58:03,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:58:03,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22950177] [2024-06-20 17:58:03,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:58:03,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:58:03,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:58:03,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:58:03,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:58:03,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22950177] [2024-06-20 17:58:03,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22950177] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:58:03,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:58:03,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:58:03,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696217548] [2024-06-20 17:58:03,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:58:03,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:58:03,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:58:03,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:58:03,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:58:03,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-20 17:58:03,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 306 transitions, 4252 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:58:03,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:58:03,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-20 17:58:03,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:58:04,522 INFO L124 PetriNetUnfolderBase]: 6791/10103 cut-off events. [2024-06-20 17:58:04,522 INFO L125 PetriNetUnfolderBase]: For 312663/312685 co-relation queries the response was YES. [2024-06-20 17:58:04,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73678 conditions, 10103 events. 6791/10103 cut-off events. For 312663/312685 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 59927 event pairs, 1786 based on Foata normal form. 22/10118 useless extension candidates. Maximal degree in co-relation 73595. Up to 8847 conditions per place. [2024-06-20 17:58:04,633 INFO L140 encePairwiseOnDemand]: 36/49 looper letters, 244 selfloop transitions, 101 changer transitions 0/354 dead transitions. [2024-06-20 17:58:04,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 354 transitions, 5471 flow [2024-06-20 17:58:04,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:58:04,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:58:04,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 247 transitions. [2024-06-20 17:58:04,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6301020408163265 [2024-06-20 17:58:04,634 INFO L175 Difference]: Start difference. First operand has 170 places, 306 transitions, 4252 flow. Second operand 8 states and 247 transitions. [2024-06-20 17:58:04,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 354 transitions, 5471 flow [2024-06-20 17:58:05,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 354 transitions, 5243 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-20 17:58:05,284 INFO L231 Difference]: Finished difference. Result has 172 places, 312 transitions, 4379 flow [2024-06-20 17:58:05,284 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=4046, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4379, PETRI_PLACES=172, PETRI_TRANSITIONS=312} [2024-06-20 17:58:05,284 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 120 predicate places. [2024-06-20 17:58:05,285 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 312 transitions, 4379 flow [2024-06-20 17:58:05,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:58:05,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:58:05,285 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:58:05,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-20 17:58:05,285 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)] === [2024-06-20 17:58:05,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:58:05,286 INFO L85 PathProgramCache]: Analyzing trace with hash -1811538478, now seen corresponding path program 3 times [2024-06-20 17:58:05,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:58:05,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472339764] [2024-06-20 17:58:05,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:58:05,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:58:05,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:58:05,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:58:05,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:58:05,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472339764] [2024-06-20 17:58:05,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472339764] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:58:05,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:58:05,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:58:05,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560892683] [2024-06-20 17:58:05,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:58:05,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:58:05,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:58:05,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:58:05,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:58:05,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-20 17:58:05,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 312 transitions, 4379 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:58:05,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:58:05,491 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-20 17:58:05,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:58:06,729 INFO L124 PetriNetUnfolderBase]: 6770/10079 cut-off events. [2024-06-20 17:58:06,730 INFO L125 PetriNetUnfolderBase]: For 309382/309404 co-relation queries the response was YES. [2024-06-20 17:58:06,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73252 conditions, 10079 events. 6770/10079 cut-off events. For 309382/309404 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 59868 event pairs, 1781 based on Foata normal form. 22/10094 useless extension candidates. Maximal degree in co-relation 73169. Up to 8831 conditions per place. [2024-06-20 17:58:06,852 INFO L140 encePairwiseOnDemand]: 36/49 looper letters, 248 selfloop transitions, 98 changer transitions 0/355 dead transitions. [2024-06-20 17:58:06,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 355 transitions, 5422 flow [2024-06-20 17:58:06,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:58:06,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:58:06,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 225 transitions. [2024-06-20 17:58:06,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6559766763848397 [2024-06-20 17:58:06,854 INFO L175 Difference]: Start difference. First operand has 172 places, 312 transitions, 4379 flow. Second operand 7 states and 225 transitions. [2024-06-20 17:58:06,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 355 transitions, 5422 flow [2024-06-20 17:58:07,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 355 transitions, 5207 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-20 17:58:07,611 INFO L231 Difference]: Finished difference. Result has 173 places, 312 transitions, 4385 flow [2024-06-20 17:58:07,612 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=4170, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4385, PETRI_PLACES=173, PETRI_TRANSITIONS=312} [2024-06-20 17:58:07,612 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 121 predicate places. [2024-06-20 17:58:07,612 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 312 transitions, 4385 flow [2024-06-20 17:58:07,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:58:07,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:58:07,613 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:58:07,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-20 17:58:07,613 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)] === [2024-06-20 17:58:07,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:58:07,613 INFO L85 PathProgramCache]: Analyzing trace with hash -1827748905, now seen corresponding path program 3 times [2024-06-20 17:58:07,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:58:07,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221962221] [2024-06-20 17:58:07,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:58:07,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:58:07,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:58:07,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:58:07,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:58:07,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221962221] [2024-06-20 17:58:07,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221962221] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:58:07,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:58:07,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:58:07,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253958249] [2024-06-20 17:58:07,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:58:07,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:58:07,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:58:07,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:58:07,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:58:07,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-20 17:58:07,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 312 transitions, 4385 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:58:07,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:58:07,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-20 17:58:07,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:58:09,069 INFO L124 PetriNetUnfolderBase]: 6856/10183 cut-off events. [2024-06-20 17:58:09,069 INFO L125 PetriNetUnfolderBase]: For 321347/321369 co-relation queries the response was YES. [2024-06-20 17:58:09,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73850 conditions, 10183 events. 6856/10183 cut-off events. For 321347/321369 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 60702 event pairs, 1430 based on Foata normal form. 36/10212 useless extension candidates. Maximal degree in co-relation 73767. Up to 8883 conditions per place. [2024-06-20 17:58:09,186 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 288 selfloop transitions, 55 changer transitions 0/352 dead transitions. [2024-06-20 17:58:09,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 352 transitions, 5227 flow [2024-06-20 17:58:09,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:58:09,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:58:09,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 193 transitions. [2024-06-20 17:58:09,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6564625850340136 [2024-06-20 17:58:09,188 INFO L175 Difference]: Start difference. First operand has 173 places, 312 transitions, 4385 flow. Second operand 6 states and 193 transitions. [2024-06-20 17:58:09,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 352 transitions, 5227 flow [2024-06-20 17:58:09,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 352 transitions, 4960 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-20 17:58:09,905 INFO L231 Difference]: Finished difference. Result has 171 places, 314 transitions, 4292 flow [2024-06-20 17:58:09,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=4118, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4292, PETRI_PLACES=171, PETRI_TRANSITIONS=314} [2024-06-20 17:58:09,905 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 119 predicate places. [2024-06-20 17:58:09,905 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 314 transitions, 4292 flow [2024-06-20 17:58:09,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:58:09,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:58:09,906 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:58:09,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-20 17:58:09,906 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)] === [2024-06-20 17:58:09,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:58:09,906 INFO L85 PathProgramCache]: Analyzing trace with hash -1827410292, now seen corresponding path program 1 times [2024-06-20 17:58:09,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:58:09,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965948312] [2024-06-20 17:58:09,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:58:09,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:58:09,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:58:10,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:58:10,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:58:10,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965948312] [2024-06-20 17:58:10,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965948312] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:58:10,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:58:10,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:58:10,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173082712] [2024-06-20 17:58:10,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:58:10,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:58:10,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:58:10,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:58:10,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:58:10,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-20 17:58:10,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 314 transitions, 4292 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:58:10,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:58:10,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-20 17:58:10,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:58:11,453 INFO L124 PetriNetUnfolderBase]: 6945/10317 cut-off events. [2024-06-20 17:58:11,454 INFO L125 PetriNetUnfolderBase]: For 314655/314677 co-relation queries the response was YES. [2024-06-20 17:58:11,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74640 conditions, 10317 events. 6945/10317 cut-off events. For 314655/314677 co-relation queries the response was YES. Maximal size of possible extension queue 512. Compared 61246 event pairs, 1787 based on Foata normal form. 28/10338 useless extension candidates. Maximal degree in co-relation 74557. Up to 9347 conditions per place. [2024-06-20 17:58:11,575 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 294 selfloop transitions, 39 changer transitions 0/342 dead transitions. [2024-06-20 17:58:11,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 342 transitions, 5184 flow [2024-06-20 17:58:11,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:58:11,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:58:11,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 179 transitions. [2024-06-20 17:58:11,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.608843537414966 [2024-06-20 17:58:11,576 INFO L175 Difference]: Start difference. First operand has 171 places, 314 transitions, 4292 flow. Second operand 6 states and 179 transitions. [2024-06-20 17:58:11,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 342 transitions, 5184 flow [2024-06-20 17:58:12,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 342 transitions, 5056 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-20 17:58:12,296 INFO L231 Difference]: Finished difference. Result has 173 places, 317 transitions, 4334 flow [2024-06-20 17:58:12,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=4164, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4334, PETRI_PLACES=173, PETRI_TRANSITIONS=317} [2024-06-20 17:58:12,297 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 121 predicate places. [2024-06-20 17:58:12,297 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 317 transitions, 4334 flow [2024-06-20 17:58:12,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:58:12,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:58:12,299 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:58:12,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-20 17:58:12,300 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 17:58:12,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:58:12,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1528821840, now seen corresponding path program 1 times [2024-06-20 17:58:12,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:58:12,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996649268] [2024-06-20 17:58:12,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:58:12,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:58:12,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:58:12,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:58:12,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:58:12,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996649268] [2024-06-20 17:58:12,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996649268] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:58:12,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:58:12,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 17:58:12,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219491684] [2024-06-20 17:58:12,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:58:12,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 17:58:12,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:58:12,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 17:58:12,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-20 17:58:12,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-20 17:58:12,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 317 transitions, 4334 flow. Second operand has 5 states, 5 states have (on average 21.0) internal successors, (105), 5 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:58:12,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:58:12,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-20 17:58:12,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:58:13,721 INFO L124 PetriNetUnfolderBase]: 6600/9829 cut-off events. [2024-06-20 17:58:13,722 INFO L125 PetriNetUnfolderBase]: For 342021/342085 co-relation queries the response was YES. [2024-06-20 17:58:13,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73868 conditions, 9829 events. 6600/9829 cut-off events. For 342021/342085 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 59017 event pairs, 1640 based on Foata normal form. 13/9638 useless extension candidates. Maximal degree in co-relation 73784. Up to 8827 conditions per place. [2024-06-20 17:58:13,832 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 273 selfloop transitions, 33 changer transitions 0/332 dead transitions. [2024-06-20 17:58:13,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 332 transitions, 4984 flow [2024-06-20 17:58:13,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 17:58:13,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 17:58:13,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 150 transitions. [2024-06-20 17:58:13,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6122448979591837 [2024-06-20 17:58:13,833 INFO L175 Difference]: Start difference. First operand has 173 places, 317 transitions, 4334 flow. Second operand 5 states and 150 transitions. [2024-06-20 17:58:13,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 332 transitions, 4984 flow [2024-06-20 17:58:14,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 332 transitions, 4856 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-20 17:58:14,498 INFO L231 Difference]: Finished difference. Result has 174 places, 317 transitions, 4290 flow [2024-06-20 17:58:14,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=4206, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4290, PETRI_PLACES=174, PETRI_TRANSITIONS=317} [2024-06-20 17:58:14,498 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 122 predicate places. [2024-06-20 17:58:14,499 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 317 transitions, 4290 flow [2024-06-20 17:58:14,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.0) internal successors, (105), 5 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:58:14,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:58:14,499 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:58:14,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-20 17:58:14,499 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 17:58:14,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:58:14,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1451686352, now seen corresponding path program 4 times [2024-06-20 17:58:14,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:58:14,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6825516] [2024-06-20 17:58:14,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:58:14,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:58:14,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:58:14,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:58:14,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:58:14,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6825516] [2024-06-20 17:58:14,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6825516] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:58:14,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:58:14,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:58:14,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287332552] [2024-06-20 17:58:14,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:58:14,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:58:14,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:58:14,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:58:14,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:58:14,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-20 17:58:14,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 317 transitions, 4290 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:58:14,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:58:14,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-20 17:58:14,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:58:15,935 INFO L124 PetriNetUnfolderBase]: 7008/10367 cut-off events. [2024-06-20 17:58:15,936 INFO L125 PetriNetUnfolderBase]: For 342363/342369 co-relation queries the response was YES. [2024-06-20 17:58:16,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75993 conditions, 10367 events. 7008/10367 cut-off events. For 342363/342369 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 61143 event pairs, 1924 based on Foata normal form. 4/10336 useless extension candidates. Maximal degree in co-relation 75908. Up to 8445 conditions per place. [2024-06-20 17:58:16,059 INFO L140 encePairwiseOnDemand]: 36/49 looper letters, 172 selfloop transitions, 213 changer transitions 0/394 dead transitions. [2024-06-20 17:58:16,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 394 transitions, 6179 flow [2024-06-20 17:58:16,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:58:16,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:58:16,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 223 transitions. [2024-06-20 17:58:16,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6501457725947521 [2024-06-20 17:58:16,061 INFO L175 Difference]: Start difference. First operand has 174 places, 317 transitions, 4290 flow. Second operand 7 states and 223 transitions. [2024-06-20 17:58:16,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 394 transitions, 6179 flow [2024-06-20 17:58:16,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 394 transitions, 6095 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-20 17:58:16,722 INFO L231 Difference]: Finished difference. Result has 179 places, 352 transitions, 5392 flow [2024-06-20 17:58:16,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=4214, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5392, PETRI_PLACES=179, PETRI_TRANSITIONS=352} [2024-06-20 17:58:16,723 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 127 predicate places. [2024-06-20 17:58:16,723 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 352 transitions, 5392 flow [2024-06-20 17:58:16,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:58:16,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:58:16,724 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:58:16,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-20 17:58:16,724 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 17:58:16,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:58:16,724 INFO L85 PathProgramCache]: Analyzing trace with hash 571016720, now seen corresponding path program 5 times [2024-06-20 17:58:16,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:58:16,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311598264] [2024-06-20 17:58:16,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:58:16,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:58:16,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:58:16,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:58:16,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:58:16,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311598264] [2024-06-20 17:58:16,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311598264] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:58:16,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:58:16,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:58:16,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781336159] [2024-06-20 17:58:16,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:58:16,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:58:16,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:58:16,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:58:16,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:58:16,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-20 17:58:16,945 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 352 transitions, 5392 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:58:16,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:58:16,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-20 17:58:16,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:58:18,368 INFO L124 PetriNetUnfolderBase]: 7000/10386 cut-off events. [2024-06-20 17:58:18,368 INFO L125 PetriNetUnfolderBase]: For 366779/366801 co-relation queries the response was YES. [2024-06-20 17:58:18,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81362 conditions, 10386 events. 7000/10386 cut-off events. For 366779/366801 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 61786 event pairs, 1790 based on Foata normal form. 19/10398 useless extension candidates. Maximal degree in co-relation 81274. Up to 9378 conditions per place. [2024-06-20 17:58:18,490 INFO L140 encePairwiseOnDemand]: 36/49 looper letters, 325 selfloop transitions, 63 changer transitions 0/397 dead transitions. [2024-06-20 17:58:18,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 397 transitions, 6422 flow [2024-06-20 17:58:18,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:58:18,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:58:18,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 241 transitions. [2024-06-20 17:58:18,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6147959183673469 [2024-06-20 17:58:18,492 INFO L175 Difference]: Start difference. First operand has 179 places, 352 transitions, 5392 flow. Second operand 8 states and 241 transitions. [2024-06-20 17:58:18,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 397 transitions, 6422 flow [2024-06-20 17:58:19,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 397 transitions, 6238 flow, removed 92 selfloop flow, removed 0 redundant places. [2024-06-20 17:58:19,502 INFO L231 Difference]: Finished difference. Result has 188 places, 357 transitions, 5446 flow [2024-06-20 17:58:19,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=5208, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5446, PETRI_PLACES=188, PETRI_TRANSITIONS=357} [2024-06-20 17:58:19,503 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 136 predicate places. [2024-06-20 17:58:19,503 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 357 transitions, 5446 flow [2024-06-20 17:58:19,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:58:19,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:58:19,503 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:58:19,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-20 17:58:19,503 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 17:58:19,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:58:19,504 INFO L85 PathProgramCache]: Analyzing trace with hash 770704460, now seen corresponding path program 6 times [2024-06-20 17:58:19,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:58:19,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400297667] [2024-06-20 17:58:19,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:58:19,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:58:19,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:58:19,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:58:19,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:58:19,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400297667] [2024-06-20 17:58:19,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400297667] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:58:19,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:58:19,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:58:19,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859027895] [2024-06-20 17:58:19,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:58:19,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:58:19,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:58:19,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:58:19,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:58:19,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-20 17:58:19,695 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 357 transitions, 5446 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:58:19,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:58:19,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-20 17:58:19,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:58:21,069 INFO L124 PetriNetUnfolderBase]: 7079/10512 cut-off events. [2024-06-20 17:58:21,069 INFO L125 PetriNetUnfolderBase]: For 370125/370147 co-relation queries the response was YES. [2024-06-20 17:58:21,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81543 conditions, 10512 events. 7079/10512 cut-off events. For 370125/370147 co-relation queries the response was YES. Maximal size of possible extension queue 526. Compared 62470 event pairs, 1782 based on Foata normal form. 19/10518 useless extension candidates. Maximal degree in co-relation 81451. Up to 8881 conditions per place. [2024-06-20 17:58:21,408 INFO L140 encePairwiseOnDemand]: 36/49 looper letters, 229 selfloop transitions, 181 changer transitions 0/419 dead transitions. [2024-06-20 17:58:21,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 419 transitions, 7112 flow [2024-06-20 17:58:21,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:58:21,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:58:21,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 253 transitions. [2024-06-20 17:58:21,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6454081632653061 [2024-06-20 17:58:21,409 INFO L175 Difference]: Start difference. First operand has 188 places, 357 transitions, 5446 flow. Second operand 8 states and 253 transitions. [2024-06-20 17:58:21,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 419 transitions, 7112 flow [2024-06-20 17:58:22,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 419 transitions, 6914 flow, removed 45 selfloop flow, removed 4 redundant places. [2024-06-20 17:58:22,114 INFO L231 Difference]: Finished difference. Result has 194 places, 373 transitions, 5940 flow [2024-06-20 17:58:22,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=5248, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5940, PETRI_PLACES=194, PETRI_TRANSITIONS=373} [2024-06-20 17:58:22,114 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 142 predicate places. [2024-06-20 17:58:22,115 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 373 transitions, 5940 flow [2024-06-20 17:58:22,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:58:22,115 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:58:22,115 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:58:22,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-20 17:58:22,115 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 17:58:22,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:58:22,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1019570718, now seen corresponding path program 7 times [2024-06-20 17:58:22,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:58:22,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872243715] [2024-06-20 17:58:22,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:58:22,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:58:22,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:58:22,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:58:22,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:58:22,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872243715] [2024-06-20 17:58:22,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872243715] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:58:22,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:58:22,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:58:22,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560417993] [2024-06-20 17:58:22,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:58:22,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:58:22,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:58:22,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:58:22,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:58:22,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-20 17:58:22,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 373 transitions, 5940 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:58:22,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:58:22,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-20 17:58:22,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:58:23,696 INFO L124 PetriNetUnfolderBase]: 7057/10484 cut-off events. [2024-06-20 17:58:23,697 INFO L125 PetriNetUnfolderBase]: For 389286/389308 co-relation queries the response was YES. [2024-06-20 17:58:23,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82959 conditions, 10484 events. 7057/10484 cut-off events. For 389286/389308 co-relation queries the response was YES. Maximal size of possible extension queue 525. Compared 62380 event pairs, 1782 based on Foata normal form. 22/10493 useless extension candidates. Maximal degree in co-relation 82864. Up to 8864 conditions per place. [2024-06-20 17:58:23,825 INFO L140 encePairwiseOnDemand]: 36/49 looper letters, 237 selfloop transitions, 177 changer transitions 0/423 dead transitions. [2024-06-20 17:58:23,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 423 transitions, 7424 flow [2024-06-20 17:58:23,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:58:23,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:58:23,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 280 transitions. [2024-06-20 17:58:23,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6349206349206349 [2024-06-20 17:58:23,826 INFO L175 Difference]: Start difference. First operand has 194 places, 373 transitions, 5940 flow. Second operand 9 states and 280 transitions. [2024-06-20 17:58:23,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 423 transitions, 7424 flow [2024-06-20 17:58:24,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 423 transitions, 7118 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-20 17:58:24,744 INFO L231 Difference]: Finished difference. Result has 199 places, 373 transitions, 6000 flow [2024-06-20 17:58:24,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=5634, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6000, PETRI_PLACES=199, PETRI_TRANSITIONS=373} [2024-06-20 17:58:24,745 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 147 predicate places. [2024-06-20 17:58:24,745 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 373 transitions, 6000 flow [2024-06-20 17:58:24,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:58:24,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:58:24,745 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:58:24,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-20 17:58:24,746 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 17:58:24,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:58:24,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1148724974, now seen corresponding path program 8 times [2024-06-20 17:58:24,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:58:24,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342090337] [2024-06-20 17:58:24,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:58:24,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:58:24,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:58:24,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:58:24,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:58:24,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342090337] [2024-06-20 17:58:24,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342090337] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:58:24,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:58:24,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:58:24,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965606493] [2024-06-20 17:58:24,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:58:24,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:58:24,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:58:24,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:58:24,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:58:24,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-20 17:58:24,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 373 transitions, 6000 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:58:24,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:58:24,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-20 17:58:24,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:58:26,391 INFO L124 PetriNetUnfolderBase]: 7044/10466 cut-off events. [2024-06-20 17:58:26,391 INFO L125 PetriNetUnfolderBase]: For 403391/403407 co-relation queries the response was YES. [2024-06-20 17:58:26,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83356 conditions, 10466 events. 7044/10466 cut-off events. For 403391/403407 co-relation queries the response was YES. Maximal size of possible extension queue 524. Compared 62222 event pairs, 1800 based on Foata normal form. 15/10467 useless extension candidates. Maximal degree in co-relation 83260. Up to 8854 conditions per place. [2024-06-20 17:58:26,513 INFO L140 encePairwiseOnDemand]: 36/49 looper letters, 231 selfloop transitions, 177 changer transitions 0/417 dead transitions. [2024-06-20 17:58:26,513 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 417 transitions, 7351 flow [2024-06-20 17:58:26,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:58:26,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:58:26,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 226 transitions. [2024-06-20 17:58:26,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6588921282798834 [2024-06-20 17:58:26,514 INFO L175 Difference]: Start difference. First operand has 199 places, 373 transitions, 6000 flow. Second operand 7 states and 226 transitions. [2024-06-20 17:58:26,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 417 transitions, 7351 flow [2024-06-20 17:58:27,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 417 transitions, 7044 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-20 17:58:27,361 INFO L231 Difference]: Finished difference. Result has 203 places, 376 transitions, 6295 flow [2024-06-20 17:58:27,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=5694, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6295, PETRI_PLACES=203, PETRI_TRANSITIONS=376} [2024-06-20 17:58:27,362 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 151 predicate places. [2024-06-20 17:58:27,362 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 376 transitions, 6295 flow [2024-06-20 17:58:27,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:58:27,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:58:27,362 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:58:27,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-20 17:58:27,362 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 17:58:27,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:58:27,363 INFO L85 PathProgramCache]: Analyzing trace with hash -1390826468, now seen corresponding path program 2 times [2024-06-20 17:58:27,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:58:27,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514429721] [2024-06-20 17:58:27,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:58:27,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:58:27,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:58:27,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:58:27,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:58:27,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514429721] [2024-06-20 17:58:27,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514429721] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:58:27,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:58:27,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:58:27,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097983896] [2024-06-20 17:58:27,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:58:27,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:58:27,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:58:27,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:58:27,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:58:27,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-20 17:58:27,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 376 transitions, 6295 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:58:27,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:58:27,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-20 17:58:27,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:58:28,972 INFO L124 PetriNetUnfolderBase]: 7115/10563 cut-off events. [2024-06-20 17:58:28,972 INFO L125 PetriNetUnfolderBase]: For 433050/433072 co-relation queries the response was YES. [2024-06-20 17:58:29,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85775 conditions, 10563 events. 7115/10563 cut-off events. For 433050/433072 co-relation queries the response was YES. Maximal size of possible extension queue 529. Compared 62775 event pairs, 1803 based on Foata normal form. 28/10578 useless extension candidates. Maximal degree in co-relation 85676. Up to 9601 conditions per place. [2024-06-20 17:58:29,100 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 354 selfloop transitions, 45 changer transitions 0/408 dead transitions. [2024-06-20 17:58:29,100 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 408 transitions, 7423 flow [2024-06-20 17:58:29,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:58:29,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:58:29,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 182 transitions. [2024-06-20 17:58:29,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-20 17:58:29,101 INFO L175 Difference]: Start difference. First operand has 203 places, 376 transitions, 6295 flow. Second operand 6 states and 182 transitions. [2024-06-20 17:58:29,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 408 transitions, 7423 flow [2024-06-20 17:58:30,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 408 transitions, 7182 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-20 17:58:30,048 INFO L231 Difference]: Finished difference. Result has 205 places, 379 transitions, 6237 flow [2024-06-20 17:58:30,052 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=6054, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6237, PETRI_PLACES=205, PETRI_TRANSITIONS=379} [2024-06-20 17:58:30,056 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 153 predicate places. [2024-06-20 17:58:30,057 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 379 transitions, 6237 flow [2024-06-20 17:58:30,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:58:30,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:58:30,057 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:58:30,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-20 17:58:30,057 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 17:58:30,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:58:30,058 INFO L85 PathProgramCache]: Analyzing trace with hash 778330956, now seen corresponding path program 3 times [2024-06-20 17:58:30,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:58:30,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334452780] [2024-06-20 17:58:30,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:58:30,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:58:30,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:58:30,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:58:30,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:58:30,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334452780] [2024-06-20 17:58:30,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334452780] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:58:30,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:58:30,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:58:30,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648197444] [2024-06-20 17:58:30,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:58:30,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:58:30,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:58:30,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:58:30,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:58:30,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-20 17:58:30,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 379 transitions, 6237 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:58:30,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:58:30,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-20 17:58:30,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:58:31,656 INFO L124 PetriNetUnfolderBase]: 7217/10701 cut-off events. [2024-06-20 17:58:31,657 INFO L125 PetriNetUnfolderBase]: For 460262/460284 co-relation queries the response was YES. [2024-06-20 17:58:31,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87315 conditions, 10701 events. 7217/10701 cut-off events. For 460262/460284 co-relation queries the response was YES. Maximal size of possible extension queue 541. Compared 63565 event pairs, 1784 based on Foata normal form. 28/10716 useless extension candidates. Maximal degree in co-relation 87215. Up to 9520 conditions per place. [2024-06-20 17:58:31,792 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 354 selfloop transitions, 55 changer transitions 0/418 dead transitions. [2024-06-20 17:58:31,792 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 418 transitions, 7547 flow [2024-06-20 17:58:31,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:58:31,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:58:31,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 186 transitions. [2024-06-20 17:58:31,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6326530612244898 [2024-06-20 17:58:31,793 INFO L175 Difference]: Start difference. First operand has 205 places, 379 transitions, 6237 flow. Second operand 6 states and 186 transitions. [2024-06-20 17:58:31,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 418 transitions, 7547 flow [2024-06-20 17:58:32,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 418 transitions, 7280 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-20 17:58:32,914 INFO L231 Difference]: Finished difference. Result has 206 places, 384 transitions, 6222 flow [2024-06-20 17:58:32,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=5970, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6222, PETRI_PLACES=206, PETRI_TRANSITIONS=384} [2024-06-20 17:58:32,915 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 154 predicate places. [2024-06-20 17:58:32,915 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 384 transitions, 6222 flow [2024-06-20 17:58:32,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:58:32,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:58:32,915 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:58:32,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-20 17:58:32,915 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)] === [2024-06-20 17:58:32,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:58:32,916 INFO L85 PathProgramCache]: Analyzing trace with hash -8798344, now seen corresponding path program 2 times [2024-06-20 17:58:32,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:58:32,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648199813] [2024-06-20 17:58:32,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:58:32,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:58:32,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:58:33,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:58:33,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:58:33,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648199813] [2024-06-20 17:58:33,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648199813] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:58:33,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:58:33,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 17:58:33,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586563415] [2024-06-20 17:58:33,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:58:33,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 17:58:33,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:58:33,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 17:58:33,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-20 17:58:33,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-20 17:58:33,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 384 transitions, 6222 flow. Second operand has 5 states, 5 states have (on average 21.0) internal successors, (105), 5 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:58:33,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:58:33,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-20 17:58:33,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:58:34,602 INFO L124 PetriNetUnfolderBase]: 6909/10262 cut-off events. [2024-06-20 17:58:34,603 INFO L125 PetriNetUnfolderBase]: For 499309/499373 co-relation queries the response was YES. [2024-06-20 17:58:34,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86576 conditions, 10262 events. 6909/10262 cut-off events. For 499309/499373 co-relation queries the response was YES. Maximal size of possible extension queue 534. Compared 61717 event pairs, 1686 based on Foata normal form. 13/10067 useless extension candidates. Maximal degree in co-relation 86476. Up to 9206 conditions per place. [2024-06-20 17:58:34,714 INFO L140 encePairwiseOnDemand]: 40/49 looper letters, 327 selfloop transitions, 48 changer transitions 0/402 dead transitions. [2024-06-20 17:58:34,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 402 transitions, 7233 flow [2024-06-20 17:58:34,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 17:58:34,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 17:58:34,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 150 transitions. [2024-06-20 17:58:34,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6122448979591837 [2024-06-20 17:58:34,716 INFO L175 Difference]: Start difference. First operand has 206 places, 384 transitions, 6222 flow. Second operand 5 states and 150 transitions. [2024-06-20 17:58:34,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 402 transitions, 7233 flow [2024-06-20 17:58:35,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 402 transitions, 7106 flow, removed 37 selfloop flow, removed 2 redundant places. [2024-06-20 17:58:35,500 INFO L231 Difference]: Finished difference. Result has 209 places, 388 transitions, 6274 flow [2024-06-20 17:58:35,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=6099, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=6274, PETRI_PLACES=209, PETRI_TRANSITIONS=388} [2024-06-20 17:58:35,501 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 157 predicate places. [2024-06-20 17:58:35,501 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 388 transitions, 6274 flow [2024-06-20 17:58:35,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.0) internal successors, (105), 5 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:58:35,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:58:35,501 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:58:35,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-20 17:58:35,502 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 17:58:35,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:58:35,502 INFO L85 PathProgramCache]: Analyzing trace with hash -2022826474, now seen corresponding path program 1 times [2024-06-20 17:58:35,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:58:35,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741114188] [2024-06-20 17:58:35,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:58:35,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:58:35,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:58:35,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:58:35,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:58:35,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741114188] [2024-06-20 17:58:35,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741114188] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:58:35,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:58:35,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:58:35,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566689439] [2024-06-20 17:58:35,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:58:35,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:58:35,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:58:35,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:58:35,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:58:35,718 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-20 17:58:35,718 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 388 transitions, 6274 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:58:35,718 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:58:35,718 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-20 17:58:35,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:58:37,438 INFO L124 PetriNetUnfolderBase]: 8045/11911 cut-off events. [2024-06-20 17:58:37,439 INFO L125 PetriNetUnfolderBase]: For 572306/572306 co-relation queries the response was YES. [2024-06-20 17:58:37,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96235 conditions, 11911 events. 8045/11911 cut-off events. For 572306/572306 co-relation queries the response was YES. Maximal size of possible extension queue 598. Compared 71849 event pairs, 1969 based on Foata normal form. 36/11938 useless extension candidates. Maximal degree in co-relation 96133. Up to 9787 conditions per place. [2024-06-20 17:58:37,594 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 409 selfloop transitions, 45 changer transitions 0/463 dead transitions. [2024-06-20 17:58:37,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 463 transitions, 8042 flow [2024-06-20 17:58:37,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:58:37,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:58:37,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 226 transitions. [2024-06-20 17:58:37,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6588921282798834 [2024-06-20 17:58:37,596 INFO L175 Difference]: Start difference. First operand has 209 places, 388 transitions, 6274 flow. Second operand 7 states and 226 transitions. [2024-06-20 17:58:37,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 463 transitions, 8042 flow [2024-06-20 17:58:38,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 463 transitions, 7891 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-20 17:58:38,983 INFO L231 Difference]: Finished difference. Result has 214 places, 396 transitions, 6381 flow [2024-06-20 17:58:38,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=6123, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6381, PETRI_PLACES=214, PETRI_TRANSITIONS=396} [2024-06-20 17:58:38,983 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 162 predicate places. [2024-06-20 17:58:38,984 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 396 transitions, 6381 flow [2024-06-20 17:58:38,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:58:38,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:58:38,984 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:58:38,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-20 17:58:38,984 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 17:58:38,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:58:38,985 INFO L85 PathProgramCache]: Analyzing trace with hash 1451694288, now seen corresponding path program 2 times [2024-06-20 17:58:38,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:58:38,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821955371] [2024-06-20 17:58:38,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:58:38,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:58:38,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:58:39,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:58:39,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:58:39,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821955371] [2024-06-20 17:58:39,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821955371] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:58:39,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:58:39,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:58:39,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054838690] [2024-06-20 17:58:39,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:58:39,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:58:39,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:58:39,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:58:39,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:58:39,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-20 17:58:39,208 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 396 transitions, 6381 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:58:39,208 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:58:39,208 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-20 17:58:39,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:58:40,951 INFO L124 PetriNetUnfolderBase]: 8322/12312 cut-off events. [2024-06-20 17:58:40,951 INFO L125 PetriNetUnfolderBase]: For 616901/616901 co-relation queries the response was YES. [2024-06-20 17:58:41,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100909 conditions, 12312 events. 8322/12312 cut-off events. For 616901/616901 co-relation queries the response was YES. Maximal size of possible extension queue 615. Compared 74808 event pairs, 2189 based on Foata normal form. 42/12341 useless extension candidates. Maximal degree in co-relation 100806. Up to 11052 conditions per place. [2024-06-20 17:58:41,122 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 387 selfloop transitions, 44 changer transitions 0/440 dead transitions. [2024-06-20 17:58:41,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 440 transitions, 7649 flow [2024-06-20 17:58:41,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:58:41,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:58:41,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 213 transitions. [2024-06-20 17:58:41,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6209912536443148 [2024-06-20 17:58:41,123 INFO L175 Difference]: Start difference. First operand has 214 places, 396 transitions, 6381 flow. Second operand 7 states and 213 transitions. [2024-06-20 17:58:41,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 440 transitions, 7649 flow [2024-06-20 17:58:42,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 440 transitions, 7513 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-06-20 17:58:42,594 INFO L231 Difference]: Finished difference. Result has 218 places, 398 transitions, 6401 flow [2024-06-20 17:58:42,595 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=6245, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=352, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6401, PETRI_PLACES=218, PETRI_TRANSITIONS=398} [2024-06-20 17:58:42,595 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 166 predicate places. [2024-06-20 17:58:42,595 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 398 transitions, 6401 flow [2024-06-20 17:58:42,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:58:42,596 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:58:42,596 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:58:42,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-20 17:58:42,596 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 17:58:42,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:58:42,596 INFO L85 PathProgramCache]: Analyzing trace with hash 1451546418, now seen corresponding path program 3 times [2024-06-20 17:58:42,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:58:42,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629076109] [2024-06-20 17:58:42,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:58:42,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:58:42,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:58:42,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:58:42,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:58:42,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629076109] [2024-06-20 17:58:42,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629076109] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:58:42,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:58:42,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:58:42,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907022074] [2024-06-20 17:58:42,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:58:42,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:58:42,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:58:42,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:58:42,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:58:42,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-20 17:58:42,846 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 398 transitions, 6401 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:58:42,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:58:42,846 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-20 17:58:42,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:58:45,500 INFO L124 PetriNetUnfolderBase]: 8830/13080 cut-off events. [2024-06-20 17:58:45,500 INFO L125 PetriNetUnfolderBase]: For 670113/670113 co-relation queries the response was YES. [2024-06-20 17:58:45,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107234 conditions, 13080 events. 8830/13080 cut-off events. For 670113/670113 co-relation queries the response was YES. Maximal size of possible extension queue 652. Compared 80529 event pairs, 2287 based on Foata normal form. 36/13107 useless extension candidates. Maximal degree in co-relation 107130. Up to 11193 conditions per place. [2024-06-20 17:58:45,774 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 399 selfloop transitions, 45 changer transitions 0/453 dead transitions. [2024-06-20 17:58:45,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 453 transitions, 7892 flow [2024-06-20 17:58:45,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:58:45,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:58:45,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 218 transitions. [2024-06-20 17:58:45,775 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6355685131195336 [2024-06-20 17:58:45,776 INFO L175 Difference]: Start difference. First operand has 218 places, 398 transitions, 6401 flow. Second operand 7 states and 218 transitions. [2024-06-20 17:58:45,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 453 transitions, 7892 flow [2024-06-20 17:58:47,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 453 transitions, 7771 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-20 17:58:47,060 INFO L231 Difference]: Finished difference. Result has 221 places, 403 transitions, 6500 flow [2024-06-20 17:58:47,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=6280, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6500, PETRI_PLACES=221, PETRI_TRANSITIONS=403} [2024-06-20 17:58:47,061 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 169 predicate places. [2024-06-20 17:58:47,061 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 403 transitions, 6500 flow [2024-06-20 17:58:47,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:58:47,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:58:47,062 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:58:47,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-20 17:58:47,062 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)] === [2024-06-20 17:58:47,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:58:47,062 INFO L85 PathProgramCache]: Analyzing trace with hash -1021139242, now seen corresponding path program 1 times [2024-06-20 17:58:47,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:58:47,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536774937] [2024-06-20 17:58:47,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:58:47,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:58:47,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:58:47,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:58:47,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:58:47,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536774937] [2024-06-20 17:58:47,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536774937] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:58:47,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:58:47,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 17:58:47,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171422655] [2024-06-20 17:58:47,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:58:47,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 17:58:47,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:58:47,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 17:58:47,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-20 17:58:47,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-20 17:58:47,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 403 transitions, 6500 flow. Second operand has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:58:47,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:58:47,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-20 17:58:47,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:58:49,445 INFO L124 PetriNetUnfolderBase]: 8837/13101 cut-off events. [2024-06-20 17:58:49,445 INFO L125 PetriNetUnfolderBase]: For 669886/669886 co-relation queries the response was YES. [2024-06-20 17:58:49,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108958 conditions, 13101 events. 8837/13101 cut-off events. For 669886/669886 co-relation queries the response was YES. Maximal size of possible extension queue 652. Compared 80674 event pairs, 2396 based on Foata normal form. 1/13098 useless extension candidates. Maximal degree in co-relation 108852. Up to 12162 conditions per place. [2024-06-20 17:58:49,701 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 408 selfloop transitions, 20 changer transitions 0/437 dead transitions. [2024-06-20 17:58:49,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 437 transitions, 7835 flow [2024-06-20 17:58:49,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 17:58:49,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 17:58:49,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 147 transitions. [2024-06-20 17:58:49,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-20 17:58:49,702 INFO L175 Difference]: Start difference. First operand has 221 places, 403 transitions, 6500 flow. Second operand 5 states and 147 transitions. [2024-06-20 17:58:49,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 437 transitions, 7835 flow [2024-06-20 17:58:51,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 437 transitions, 7720 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-06-20 17:58:51,097 INFO L231 Difference]: Finished difference. Result has 225 places, 418 transitions, 6819 flow [2024-06-20 17:58:51,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=6399, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=6819, PETRI_PLACES=225, PETRI_TRANSITIONS=418} [2024-06-20 17:58:51,097 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 173 predicate places. [2024-06-20 17:58:51,098 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 418 transitions, 6819 flow [2024-06-20 17:58:51,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:58:51,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:58:51,098 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:58:51,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-20 17:58:51,098 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 17:58:51,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:58:51,099 INFO L85 PathProgramCache]: Analyzing trace with hash 1769900910, now seen corresponding path program 4 times [2024-06-20 17:58:51,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:58:51,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007817652] [2024-06-20 17:58:51,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:58:51,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:58:51,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:58:51,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:58:51,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:58:51,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007817652] [2024-06-20 17:58:51,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007817652] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:58:51,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:58:51,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:58:51,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73313458] [2024-06-20 17:58:51,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:58:51,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:58:51,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:58:51,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:58:51,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:58:51,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-20 17:58:51,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 418 transitions, 6819 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:58:51,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:58:51,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-20 17:58:51,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:58:53,902 INFO L124 PetriNetUnfolderBase]: 9063/13398 cut-off events. [2024-06-20 17:58:53,902 INFO L125 PetriNetUnfolderBase]: For 736057/736063 co-relation queries the response was YES. [2024-06-20 17:58:54,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111273 conditions, 13398 events. 9063/13398 cut-off events. For 736057/736063 co-relation queries the response was YES. Maximal size of possible extension queue 667. Compared 82609 event pairs, 2412 based on Foata normal form. 46/13433 useless extension candidates. Maximal degree in co-relation 111163. Up to 12177 conditions per place. [2024-06-20 17:58:54,099 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 402 selfloop transitions, 50 changer transitions 0/461 dead transitions. [2024-06-20 17:58:54,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 461 transitions, 8020 flow [2024-06-20 17:58:54,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:58:54,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:58:54,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 237 transitions. [2024-06-20 17:58:54,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6045918367346939 [2024-06-20 17:58:54,120 INFO L175 Difference]: Start difference. First operand has 225 places, 418 transitions, 6819 flow. Second operand 8 states and 237 transitions. [2024-06-20 17:58:54,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 461 transitions, 8020 flow [2024-06-20 17:58:55,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 461 transitions, 7994 flow, removed 13 selfloop flow, removed 0 redundant places. [2024-06-20 17:58:55,516 INFO L231 Difference]: Finished difference. Result has 233 places, 420 transitions, 6969 flow [2024-06-20 17:58:55,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=6793, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6969, PETRI_PLACES=233, PETRI_TRANSITIONS=420} [2024-06-20 17:58:55,517 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 181 predicate places. [2024-06-20 17:58:55,517 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 420 transitions, 6969 flow [2024-06-20 17:58:55,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:58:55,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:58:55,518 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:58:55,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-20 17:58:55,518 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 17:58:55,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:58:55,518 INFO L85 PathProgramCache]: Analyzing trace with hash 571410606, now seen corresponding path program 5 times [2024-06-20 17:58:55,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:58:55,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703805779] [2024-06-20 17:58:55,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:58:55,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:58:55,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:58:55,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:58:55,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:58:55,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703805779] [2024-06-20 17:58:55,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703805779] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:58:55,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:58:55,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:58:55,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164498364] [2024-06-20 17:58:55,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:58:55,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:58:55,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:58:55,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:58:55,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:58:55,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-20 17:58:55,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 420 transitions, 6969 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:58:55,733 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:58:55,733 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-20 17:58:55,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:58:58,225 INFO L124 PetriNetUnfolderBase]: 9301/13761 cut-off events. [2024-06-20 17:58:58,226 INFO L125 PetriNetUnfolderBase]: For 767406/767406 co-relation queries the response was YES. [2024-06-20 17:58:58,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114798 conditions, 13761 events. 9301/13761 cut-off events. For 767406/767406 co-relation queries the response was YES. Maximal size of possible extension queue 682. Compared 85266 event pairs, 2496 based on Foata normal form. 42/13794 useless extension candidates. Maximal degree in co-relation 114685. Up to 12465 conditions per place. [2024-06-20 17:58:58,425 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 400 selfloop transitions, 46 changer transitions 0/455 dead transitions. [2024-06-20 17:58:58,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 455 transitions, 8144 flow [2024-06-20 17:58:58,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:58:58,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:58:58,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 185 transitions. [2024-06-20 17:58:58,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6292517006802721 [2024-06-20 17:58:58,427 INFO L175 Difference]: Start difference. First operand has 233 places, 420 transitions, 6969 flow. Second operand 6 states and 185 transitions. [2024-06-20 17:58:58,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 455 transitions, 8144 flow [2024-06-20 17:59:00,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 455 transitions, 8016 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-20 17:59:00,221 INFO L231 Difference]: Finished difference. Result has 234 places, 422 transitions, 7013 flow [2024-06-20 17:59:00,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=6841, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7013, PETRI_PLACES=234, PETRI_TRANSITIONS=422} [2024-06-20 17:59:00,222 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 182 predicate places. [2024-06-20 17:59:00,222 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 422 transitions, 7013 flow [2024-06-20 17:59:00,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:59:00,222 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:59:00,222 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:59:00,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-20 17:59:00,222 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 17:59:00,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:59:00,223 INFO L85 PathProgramCache]: Analyzing trace with hash -1024865642, now seen corresponding path program 6 times [2024-06-20 17:59:00,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:59:00,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74797799] [2024-06-20 17:59:00,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:59:00,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:59:00,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:59:00,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:59:00,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:59:00,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74797799] [2024-06-20 17:59:00,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74797799] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:59:00,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:59:00,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:59:00,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822181489] [2024-06-20 17:59:00,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:59:00,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:59:00,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:59:00,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:59:00,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:59:00,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-20 17:59:00,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 422 transitions, 7013 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:59:00,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:59:00,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-20 17:59:00,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:59:03,071 INFO L124 PetriNetUnfolderBase]: 9431/13967 cut-off events. [2024-06-20 17:59:03,071 INFO L125 PetriNetUnfolderBase]: For 778802/778802 co-relation queries the response was YES. [2024-06-20 17:59:03,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115973 conditions, 13967 events. 9431/13967 cut-off events. For 778802/778802 co-relation queries the response was YES. Maximal size of possible extension queue 685. Compared 86785 event pairs, 2388 based on Foata normal form. 36/13994 useless extension candidates. Maximal degree in co-relation 115858. Up to 11752 conditions per place. [2024-06-20 17:59:03,280 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 412 selfloop transitions, 50 changer transitions 0/471 dead transitions. [2024-06-20 17:59:03,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 471 transitions, 8435 flow [2024-06-20 17:59:03,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:59:03,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:59:03,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 194 transitions. [2024-06-20 17:59:03,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6598639455782312 [2024-06-20 17:59:03,282 INFO L175 Difference]: Start difference. First operand has 234 places, 422 transitions, 7013 flow. Second operand 6 states and 194 transitions. [2024-06-20 17:59:03,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 471 transitions, 8435 flow [2024-06-20 17:59:05,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 471 transitions, 8298 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-20 17:59:05,254 INFO L231 Difference]: Finished difference. Result has 237 places, 426 transitions, 7116 flow [2024-06-20 17:59:05,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=6876, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7116, PETRI_PLACES=237, PETRI_TRANSITIONS=426} [2024-06-20 17:59:05,255 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 185 predicate places. [2024-06-20 17:59:05,255 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 426 transitions, 7116 flow [2024-06-20 17:59:05,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:59:05,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:59:05,255 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:59:05,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-20 17:59:05,256 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 17:59:05,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:59:05,256 INFO L85 PathProgramCache]: Analyzing trace with hash 778336908, now seen corresponding path program 1 times [2024-06-20 17:59:05,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:59:05,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222389072] [2024-06-20 17:59:05,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:59:05,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:59:05,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:59:05,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:59:05,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:59:05,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222389072] [2024-06-20 17:59:05,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222389072] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:59:05,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:59:05,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:59:05,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538020196] [2024-06-20 17:59:05,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:59:05,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:59:05,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:59:05,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:59:05,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:59:05,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-20 17:59:05,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 426 transitions, 7116 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:59:05,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:59:05,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-20 17:59:05,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:59:07,944 INFO L124 PetriNetUnfolderBase]: 9515/14087 cut-off events. [2024-06-20 17:59:07,944 INFO L125 PetriNetUnfolderBase]: For 804628/804634 co-relation queries the response was YES. [2024-06-20 17:59:08,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117099 conditions, 14087 events. 9515/14087 cut-off events. For 804628/804634 co-relation queries the response was YES. Maximal size of possible extension queue 689. Compared 87693 event pairs, 2412 based on Foata normal form. 40/14118 useless extension candidates. Maximal degree in co-relation 116982. Up to 12298 conditions per place. [2024-06-20 17:59:08,364 INFO L140 encePairwiseOnDemand]: 38/49 looper letters, 409 selfloop transitions, 57 changer transitions 0/475 dead transitions. [2024-06-20 17:59:08,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 475 transitions, 8400 flow [2024-06-20 17:59:08,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:59:08,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:59:08,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 241 transitions. [2024-06-20 17:59:08,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6147959183673469 [2024-06-20 17:59:08,366 INFO L175 Difference]: Start difference. First operand has 237 places, 426 transitions, 7116 flow. Second operand 8 states and 241 transitions. [2024-06-20 17:59:08,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 475 transitions, 8400 flow [2024-06-20 17:59:10,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 475 transitions, 8183 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-06-20 17:59:10,505 INFO L231 Difference]: Finished difference. Result has 240 places, 428 transitions, 7088 flow [2024-06-20 17:59:10,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=6899, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=369, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7088, PETRI_PLACES=240, PETRI_TRANSITIONS=428} [2024-06-20 17:59:10,505 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 188 predicate places. [2024-06-20 17:59:10,506 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 428 transitions, 7088 flow [2024-06-20 17:59:10,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:59:10,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:59:10,506 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:59:10,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-20 17:59:10,506 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)] === [2024-06-20 17:59:10,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:59:10,507 INFO L85 PathProgramCache]: Analyzing trace with hash -8792392, now seen corresponding path program 2 times [2024-06-20 17:59:10,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:59:10,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253509217] [2024-06-20 17:59:10,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:59:10,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:59:10,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:59:10,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:59:10,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:59:10,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253509217] [2024-06-20 17:59:10,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253509217] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:59:10,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:59:10,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 17:59:10,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480633339] [2024-06-20 17:59:10,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:59:10,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 17:59:10,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:59:10,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 17:59:10,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-20 17:59:10,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-20 17:59:10,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 428 transitions, 7088 flow. Second operand has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:59:10,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:59:10,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-20 17:59:10,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:59:13,419 INFO L124 PetriNetUnfolderBase]: 9511/14080 cut-off events. [2024-06-20 17:59:13,419 INFO L125 PetriNetUnfolderBase]: For 781677/781677 co-relation queries the response was YES. [2024-06-20 17:59:13,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116171 conditions, 14080 events. 9511/14080 cut-off events. For 781677/781677 co-relation queries the response was YES. Maximal size of possible extension queue 689. Compared 87709 event pairs, 2593 based on Foata normal form. 1/14076 useless extension candidates. Maximal degree in co-relation 116054. Up to 13128 conditions per place. [2024-06-20 17:59:13,615 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 411 selfloop transitions, 20 changer transitions 0/440 dead transitions. [2024-06-20 17:59:13,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 440 transitions, 7980 flow [2024-06-20 17:59:13,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 17:59:13,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 17:59:13,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 140 transitions. [2024-06-20 17:59:13,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-20 17:59:13,617 INFO L175 Difference]: Start difference. First operand has 240 places, 428 transitions, 7088 flow. Second operand 5 states and 140 transitions. [2024-06-20 17:59:13,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 440 transitions, 7980 flow [2024-06-20 17:59:15,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 440 transitions, 7800 flow, removed 27 selfloop flow, removed 7 redundant places. [2024-06-20 17:59:15,604 INFO L231 Difference]: Finished difference. Result has 238 places, 428 transitions, 6955 flow [2024-06-20 17:59:15,604 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=6908, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=428, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=6955, PETRI_PLACES=238, PETRI_TRANSITIONS=428} [2024-06-20 17:59:15,604 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 186 predicate places. [2024-06-20 17:59:15,604 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 428 transitions, 6955 flow [2024-06-20 17:59:15,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:59:15,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:59:15,605 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:59:15,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-20 17:59:15,605 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)] === [2024-06-20 17:59:15,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:59:15,605 INFO L85 PathProgramCache]: Analyzing trace with hash -40953776, now seen corresponding path program 1 times [2024-06-20 17:59:15,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:59:15,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464889410] [2024-06-20 17:59:15,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:59:15,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:59:15,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:59:15,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:59:15,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:59:15,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464889410] [2024-06-20 17:59:15,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464889410] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:59:15,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:59:15,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 17:59:15,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108916016] [2024-06-20 17:59:15,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:59:15,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 17:59:15,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:59:15,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 17:59:15,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-20 17:59:15,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-06-20 17:59:15,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 428 transitions, 6955 flow. Second operand has 5 states, 5 states have (on average 21.0) internal successors, (105), 5 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:59:15,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:59:15,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-06-20 17:59:15,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:59:18,457 INFO L124 PetriNetUnfolderBase]: 9241/13734 cut-off events. [2024-06-20 17:59:18,457 INFO L125 PetriNetUnfolderBase]: For 818983/818983 co-relation queries the response was YES. [2024-06-20 17:59:18,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114190 conditions, 13734 events. 9241/13734 cut-off events. For 818983/818983 co-relation queries the response was YES. Maximal size of possible extension queue 689. Compared 86127 event pairs, 2457 based on Foata normal form. 12/13546 useless extension candidates. Maximal degree in co-relation 114073. Up to 12527 conditions per place. [2024-06-20 17:59:18,984 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 392 selfloop transitions, 23 changer transitions 0/447 dead transitions. [2024-06-20 17:59:18,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 447 transitions, 7913 flow [2024-06-20 17:59:18,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 17:59:18,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 17:59:18,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 148 transitions. [2024-06-20 17:59:18,985 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6040816326530613 [2024-06-20 17:59:18,986 INFO L175 Difference]: Start difference. First operand has 238 places, 428 transitions, 6955 flow. Second operand 5 states and 148 transitions. [2024-06-20 17:59:18,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 447 transitions, 7913 flow [2024-06-20 17:59:20,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 447 transitions, 7884 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-06-20 17:59:20,455 INFO L231 Difference]: Finished difference. Result has 242 places, 431 transitions, 7052 flow [2024-06-20 17:59:20,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=6926, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=428, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=7052, PETRI_PLACES=242, PETRI_TRANSITIONS=431} [2024-06-20 17:59:20,455 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 190 predicate places. [2024-06-20 17:59:20,456 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 431 transitions, 7052 flow [2024-06-20 17:59:20,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.0) internal successors, (105), 5 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:59:20,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:59:20,456 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:59:20,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-20 17:59:20,456 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 17:59:20,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:59:20,457 INFO L85 PathProgramCache]: Analyzing trace with hash -1281256740, now seen corresponding path program 1 times [2024-06-20 17:59:20,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:59:20,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498962574] [2024-06-20 17:59:20,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:59:20,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:59:20,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:59:20,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:59:20,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:59:20,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498962574] [2024-06-20 17:59:20,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498962574] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:59:20,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:59:20,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:59:20,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330772639] [2024-06-20 17:59:20,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:59:20,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:59:20,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:59:20,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:59:20,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:59:20,680 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-20 17:59:20,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 431 transitions, 7052 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:59:20,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:59:20,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-20 17:59:20,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:59:23,315 INFO L124 PetriNetUnfolderBase]: 9578/14166 cut-off events. [2024-06-20 17:59:23,316 INFO L125 PetriNetUnfolderBase]: For 831147/831175 co-relation queries the response was YES. [2024-06-20 17:59:23,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117589 conditions, 14166 events. 9578/14166 cut-off events. For 831147/831175 co-relation queries the response was YES. Maximal size of possible extension queue 697. Compared 88295 event pairs, 2641 based on Foata normal form. 23/14171 useless extension candidates. Maximal degree in co-relation 117470. Up to 12372 conditions per place. [2024-06-20 17:59:23,844 INFO L140 encePairwiseOnDemand]: 36/49 looper letters, 300 selfloop transitions, 194 changer transitions 0/503 dead transitions. [2024-06-20 17:59:23,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 503 transitions, 9228 flow [2024-06-20 17:59:23,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-20 17:59:23,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-20 17:59:23,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 376 transitions. [2024-06-20 17:59:23,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5902668759811617 [2024-06-20 17:59:23,846 INFO L175 Difference]: Start difference. First operand has 242 places, 431 transitions, 7052 flow. Second operand 13 states and 376 transitions. [2024-06-20 17:59:23,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 503 transitions, 9228 flow [2024-06-20 17:59:25,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 503 transitions, 9142 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-06-20 17:59:25,943 INFO L231 Difference]: Finished difference. Result has 254 places, 442 transitions, 7646 flow [2024-06-20 17:59:25,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=6966, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=431, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=7646, PETRI_PLACES=254, PETRI_TRANSITIONS=442} [2024-06-20 17:59:25,944 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 202 predicate places. [2024-06-20 17:59:25,944 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 442 transitions, 7646 flow [2024-06-20 17:59:25,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:59:25,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:59:25,944 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:59:25,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-20 17:59:25,945 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 17:59:25,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:59:25,945 INFO L85 PathProgramCache]: Analyzing trace with hash -1872876384, now seen corresponding path program 2 times [2024-06-20 17:59:25,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:59:25,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631026827] [2024-06-20 17:59:25,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:59:25,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:59:25,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:59:26,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:59:26,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:59:26,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631026827] [2024-06-20 17:59:26,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631026827] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:59:26,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:59:26,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:59:26,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613530365] [2024-06-20 17:59:26,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:59:26,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:59:26,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:59:26,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:59:26,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:59:26,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-20 17:59:26,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 442 transitions, 7646 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:59:26,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:59:26,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-20 17:59:26,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:59:28,874 INFO L124 PetriNetUnfolderBase]: 9570/14163 cut-off events. [2024-06-20 17:59:28,875 INFO L125 PetriNetUnfolderBase]: For 866700/866728 co-relation queries the response was YES. [2024-06-20 17:59:29,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119478 conditions, 14163 events. 9570/14163 cut-off events. For 866700/866728 co-relation queries the response was YES. Maximal size of possible extension queue 697. Compared 88402 event pairs, 2641 based on Foata normal form. 23/14168 useless extension candidates. Maximal degree in co-relation 119356. Up to 12366 conditions per place. [2024-06-20 17:59:29,102 INFO L140 encePairwiseOnDemand]: 36/49 looper letters, 299 selfloop transitions, 191 changer transitions 0/499 dead transitions. [2024-06-20 17:59:29,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 499 transitions, 9376 flow [2024-06-20 17:59:29,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 17:59:29,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 17:59:29,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 329 transitions. [2024-06-20 17:59:29,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6103896103896104 [2024-06-20 17:59:29,103 INFO L175 Difference]: Start difference. First operand has 254 places, 442 transitions, 7646 flow. Second operand 11 states and 329 transitions. [2024-06-20 17:59:29,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 499 transitions, 9376 flow [2024-06-20 17:59:31,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 499 transitions, 8889 flow, removed 107 selfloop flow, removed 8 redundant places. [2024-06-20 17:59:31,830 INFO L231 Difference]: Finished difference. Result has 257 places, 442 transitions, 7552 flow [2024-06-20 17:59:31,846 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=7159, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=191, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7552, PETRI_PLACES=257, PETRI_TRANSITIONS=442} [2024-06-20 17:59:31,846 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 205 predicate places. [2024-06-20 17:59:31,846 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 442 transitions, 7552 flow [2024-06-20 17:59:31,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:59:31,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:59:31,847 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:59:31,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-20 17:59:31,847 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 17:59:31,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:59:31,847 INFO L85 PathProgramCache]: Analyzing trace with hash -2109144000, now seen corresponding path program 1 times [2024-06-20 17:59:31,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:59:31,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986298847] [2024-06-20 17:59:31,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:59:31,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:59:31,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:59:32,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:59:32,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:59:32,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986298847] [2024-06-20 17:59:32,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986298847] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:59:32,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:59:32,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:59:32,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041517836] [2024-06-20 17:59:32,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:59:32,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:59:32,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:59:32,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:59:32,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:59:32,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 49 [2024-06-20 17:59:32,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 442 transitions, 7552 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:59:32,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:59:32,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 49 [2024-06-20 17:59:32,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand