./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe007_pso.oepc_pso.opt_tso.oepc_tso.opt-thin001_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/safe007_pso.oepc_pso.opt_tso.oepc_tso.opt-thin001_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/safe007_pso.oepc_pso.opt_tso.oepc_tso.opt-thin001_pso.oepc_pso.opt_tso.oepc_tso.opt.i ./goblint.2024-05-21_14-57-05.files/mutex-meet/safe007_pso.oepc_pso.opt_tso.oepc_tso.opt-thin001_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 17:45:50,867 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-20 17:45:50,904 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-20 17:45:50,907 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-20 17:45:50,908 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-20 17:45:50,922 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-20 17:45:50,923 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-20 17:45:50,923 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-20 17:45:50,923 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-20 17:45:50,924 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-20 17:45:50,924 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-20 17:45:50,925 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-20 17:45:50,925 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-20 17:45:50,925 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-20 17:45:50,926 INFO L153 SettingsManager]: * Use SBE=true [2024-06-20 17:45:50,926 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-20 17:45:50,926 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-20 17:45:50,927 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-20 17:45:50,927 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-20 17:45:50,927 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-20 17:45:50,927 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-20 17:45:50,928 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-20 17:45:50,928 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-20 17:45:50,928 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-20 17:45:50,929 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-20 17:45:50,929 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-20 17:45:50,929 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-20 17:45:50,929 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-20 17:45:50,930 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-20 17:45:50,930 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-20 17:45:50,930 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-20 17:45:50,930 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-20 17:45:50,930 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 17:45:50,931 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-20 17:45:50,931 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-20 17:45:50,931 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-20 17:45:50,931 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-20 17:45:50,932 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-20 17:45:50,932 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-20 17:45:50,932 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-20 17:45:50,932 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-20 17:45:50,932 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-20 17:45:50,933 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-20 17:45:50,933 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-20 17:45:51,141 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-20 17:45:51,160 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-20 17:45:51,162 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-20 17:45:51,163 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-20 17:45:51,164 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-20 17:45:51,165 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/mutex-meet/safe007_pso.oepc_pso.opt_tso.oepc_tso.opt-thin001_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml [2024-06-20 17:45:51,266 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-20 17:45:51,268 INFO L274 PluginConnector]: CDTParser initialized [2024-06-20 17:45:51,269 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe007_pso.oepc_pso.opt_tso.oepc_tso.opt-thin001_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-20 17:45:52,394 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-20 17:45:52,579 INFO L384 CDTParser]: Found 1 translation units. [2024-06-20 17:45:52,579 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe007_pso.oepc_pso.opt_tso.oepc_tso.opt-thin001_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-20 17:45:52,590 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a0a596eb8/a3274b1580d24f3e86a9eab5091660aa/FLAG30a5a1418 [2024-06-20 17:45:52,601 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a0a596eb8/a3274b1580d24f3e86a9eab5091660aa [2024-06-20 17:45:52,602 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-20 17:45:52,603 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-20 17:45:52,605 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-20 17:45:52,606 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-20 17:45:52,609 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-20 17:45:52,610 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 05:45:51" (1/2) ... [2024-06-20 17:45:52,612 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71efd4ca and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:45:52, skipping insertion in model container [2024-06-20 17:45:52,613 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 05:45:51" (1/2) ... [2024-06-20 17:45:52,614 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@51798955 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 05:45:52, skipping insertion in model container [2024-06-20 17:45:52,615 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 05:45:52" (2/2) ... [2024-06-20 17:45:52,615 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71efd4ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:45:52, skipping insertion in model container [2024-06-20 17:45:52,615 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 05:45:52" (2/2) ... [2024-06-20 17:45:52,616 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-20 17:45:52,700 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-20 17:45:52,701 INFO L97 edCorrectnessWitness]: Location invariant before [L783-L783] ((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || (((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p1_EAX) + (long long )x >= 0LL && (1LL - (long long )__unbuffered_p1_EAX) + (long long )__unbuffered_p2_EAX >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )y >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )z >= 0LL) && (1LL - (long long )x) + (long long )y >= 0LL) && (1LL - (long long )x) + (long long )z >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p0_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p1_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_cnt + (long long )z >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p1_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )z >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )z >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )z >= 0LL) && (long long )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )z >= 0LL) && (long long )x + (long long )y >= 0LL) && (long long )x + (long long )z >= 0LL) && (long long )y + (long long )z >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p1_EAX >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )__unbuffered_p1_EAX >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )x >= 0LL) && (1LL + (long long )main$tmp_guard1) - (long long )x >= 0LL) && (2LL - (long long )__unbuffered_p1_EAX) - (long long )x >= 0LL))) && (! multithreaded || ((((((((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p1_EAX) && 0 <= __unbuffered_p2_EAX) && 0 <= x) && 0 <= y) && 0 <= z) && __unbuffered_p0_EAX <= 1) && __unbuffered_p1_EAX <= 1) && __unbuffered_p2_EAX <= 1) && x <= 1) && y <= 1) && z <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1)) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) [2024-06-20 17:45:52,701 INFO L97 edCorrectnessWitness]: Location invariant before [L785-L785] ((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || (((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p1_EAX) + (long long )x >= 0LL && (1LL - (long long )__unbuffered_p1_EAX) + (long long )__unbuffered_p2_EAX >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )y >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )z >= 0LL) && (1LL - (long long )x) + (long long )y >= 0LL) && (1LL - (long long )x) + (long long )z >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p0_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p1_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_cnt + (long long )z >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p1_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )z >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )z >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )z >= 0LL) && (long long )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )z >= 0LL) && (long long )x + (long long )y >= 0LL) && (long long )x + (long long )z >= 0LL) && (long long )y + (long long )z >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p1_EAX >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )__unbuffered_p1_EAX >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )x >= 0LL) && (1LL + (long long )main$tmp_guard1) - (long long )x >= 0LL) && (2LL - (long long )__unbuffered_p1_EAX) - (long long )x >= 0LL))) && (! multithreaded || ((((((((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p1_EAX) && 0 <= __unbuffered_p2_EAX) && 0 <= x) && 0 <= y) && 0 <= z) && __unbuffered_p0_EAX <= 1) && __unbuffered_p1_EAX <= 1) && __unbuffered_p2_EAX <= 1) && x <= 1) && y <= 1) && z <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1)) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) [2024-06-20 17:45:52,701 INFO L97 edCorrectnessWitness]: Location invariant before [L786-L786] ((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || (((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p1_EAX) + (long long )x >= 0LL && (1LL - (long long )__unbuffered_p1_EAX) + (long long )__unbuffered_p2_EAX >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )y >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )z >= 0LL) && (1LL - (long long )x) + (long long )y >= 0LL) && (1LL - (long long )x) + (long long )z >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p0_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p1_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_cnt + (long long )z >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p1_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )z >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )z >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )z >= 0LL) && (long long )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )z >= 0LL) && (long long )x + (long long )y >= 0LL) && (long long )x + (long long )z >= 0LL) && (long long )y + (long long )z >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p1_EAX >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )__unbuffered_p1_EAX >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )x >= 0LL) && (1LL + (long long )main$tmp_guard1) - (long long )x >= 0LL) && (2LL - (long long )__unbuffered_p1_EAX) - (long long )x >= 0LL))) && (! multithreaded || ((((((((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p1_EAX) && 0 <= __unbuffered_p2_EAX) && 0 <= x) && 0 <= y) && 0 <= z) && __unbuffered_p0_EAX <= 1) && __unbuffered_p1_EAX <= 1) && __unbuffered_p2_EAX <= 1) && x <= 1) && y <= 1) && z <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1)) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) [2024-06-20 17:45:52,702 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-20 17:45:52,702 INFO L106 edCorrectnessWitness]: ghost_update [L781-L781] multithreaded = 1; [2024-06-20 17:45:52,735 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-20 17:45:53,004 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 17:45:53,016 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-20 17:45:53,157 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 17:45:53,187 INFO L206 MainTranslator]: Completed translation [2024-06-20 17:45:53,191 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:45:53 WrapperNode [2024-06-20 17:45:53,191 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-20 17:45:53,192 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-20 17:45:53,192 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-20 17:45:53,192 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-20 17:45:53,197 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:45:53" (1/1) ... [2024-06-20 17:45:53,209 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:45:53" (1/1) ... [2024-06-20 17:45:53,253 INFO L138 Inliner]: procedures = 175, calls = 42, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 67 [2024-06-20 17:45:53,254 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-20 17:45:53,254 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-20 17:45:53,255 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-20 17:45:53,255 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-20 17:45:53,266 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:45:53" (1/1) ... [2024-06-20 17:45:53,266 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:45:53" (1/1) ... [2024-06-20 17:45:53,273 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:45:53" (1/1) ... [2024-06-20 17:45:53,291 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 17:45:53,291 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:45:53" (1/1) ... [2024-06-20 17:45:53,292 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:45:53" (1/1) ... [2024-06-20 17:45:53,297 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:45:53" (1/1) ... [2024-06-20 17:45:53,298 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:45:53" (1/1) ... [2024-06-20 17:45:53,300 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:45:53" (1/1) ... [2024-06-20 17:45:53,301 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:45:53" (1/1) ... [2024-06-20 17:45:53,303 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-20 17:45:53,304 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-20 17:45:53,317 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-20 17:45:53,318 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-20 17:45:53,318 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:45:53" (1/1) ... [2024-06-20 17:45:53,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 17:45:53,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-20 17:45:53,354 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 17:45:53,379 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 17:45:53,393 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-20 17:45:53,394 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-20 17:45:53,394 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-20 17:45:53,394 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-20 17:45:53,394 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-20 17:45:53,395 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-20 17:45:53,395 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-20 17:45:53,395 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-20 17:45:53,395 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-20 17:45:53,395 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-20 17:45:53,395 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-20 17:45:53,396 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-20 17:45:53,397 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 17:45:53,487 INFO L244 CfgBuilder]: Building ICFG [2024-06-20 17:45:53,489 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-20 17:45:53,743 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-20 17:45:53,743 INFO L293 CfgBuilder]: Performing block encoding [2024-06-20 17:45:53,808 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-20 17:45:53,809 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-20 17:45:53,809 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 05:45:53 BoogieIcfgContainer [2024-06-20 17:45:53,809 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-20 17:45:53,810 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-20 17:45:53,810 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-20 17:45:53,813 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-20 17:45:53,813 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 05:45:51" (1/4) ... [2024-06-20 17:45:53,813 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bb9bbf8 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 05:45:53, skipping insertion in model container [2024-06-20 17:45:53,813 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.06 05:45:52" (2/4) ... [2024-06-20 17:45:53,814 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bb9bbf8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.06 05:45:53, skipping insertion in model container [2024-06-20 17:45:53,814 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 05:45:53" (3/4) ... [2024-06-20 17:45:53,814 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bb9bbf8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.06 05:45:53, skipping insertion in model container [2024-06-20 17:45:53,814 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 05:45:53" (4/4) ... [2024-06-20 17:45:53,815 INFO L112 eAbstractionObserver]: Analyzing ICFG safe007_pso.oepc_pso.opt_tso.oepc_tso.opt-thin001_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-20 17:45:53,827 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-20 17:45:53,827 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-20 17:45:53,827 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-20 17:45:53,872 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-20 17:45:53,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 50 places, 40 transitions, 92 flow [2024-06-20 17:45:53,918 INFO L124 PetriNetUnfolderBase]: 0/37 cut-off events. [2024-06-20 17:45:53,919 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 17:45:53,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47 conditions, 37 events. 0/37 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 61 event pairs, 0 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-20 17:45:53,920 INFO L82 GeneralOperation]: Start removeDead. Operand has 50 places, 40 transitions, 92 flow [2024-06-20 17:45:53,922 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 31 transitions, 71 flow [2024-06-20 17:45:53,928 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-20 17:45:53,933 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;@182bd2e5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-20 17:45:53,933 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-20 17:45:53,936 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-20 17:45:53,936 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-20 17:45:53,936 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 17:45:53,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:45:53,936 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-20 17:45:53,937 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:45:53,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:45:53,940 INFO L85 PathProgramCache]: Analyzing trace with hash 219098506, now seen corresponding path program 1 times [2024-06-20 17:45:53,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:45:53,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129304011] [2024-06-20 17:45:53,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:45:53,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:45:54,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:45:54,656 INFO 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 17:45:54,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:45:54,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129304011] [2024-06-20 17:45:54,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129304011] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:45:54,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:45:54,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-20 17:45:54,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726227980] [2024-06-20 17:45:54,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:45:54,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-20 17:45:54,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:45:54,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-20 17:45:54,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-20 17:45:54,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 40 [2024-06-20 17:45:54,754 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 31 transitions, 71 flow. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states 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 17:45:54,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:45:54,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 40 [2024-06-20 17:45:54,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:45:54,962 INFO L124 PetriNetUnfolderBase]: 471/807 cut-off events. [2024-06-20 17:45:54,962 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-06-20 17:45:54,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1595 conditions, 807 events. 471/807 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 3881 event pairs, 288 based on Foata normal form. 1/786 useless extension candidates. Maximal degree in co-relation 1583. Up to 733 conditions per place. [2024-06-20 17:45:54,973 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 27 selfloop transitions, 4 changer transitions 0/41 dead transitions. [2024-06-20 17:45:54,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 41 transitions, 159 flow [2024-06-20 17:45:54,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-20 17:45:54,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-20 17:45:54,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 85 transitions. [2024-06-20 17:45:54,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7083333333333334 [2024-06-20 17:45:54,984 INFO L175 Difference]: Start difference. First operand has 41 places, 31 transitions, 71 flow. Second operand 3 states and 85 transitions. [2024-06-20 17:45:54,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 41 transitions, 159 flow [2024-06-20 17:45:54,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 41 transitions, 154 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-20 17:45:54,990 INFO L231 Difference]: Finished difference. Result has 41 places, 34 transitions, 98 flow [2024-06-20 17:45:54,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=41, PETRI_TRANSITIONS=34} [2024-06-20 17:45:54,994 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 0 predicate places. [2024-06-20 17:45:54,995 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 34 transitions, 98 flow [2024-06-20 17:45:54,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states 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 17:45:54,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:45:54,995 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:45:54,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-20 17:45:54,996 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:45:54,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:45:54,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1165332823, now seen corresponding path program 1 times [2024-06-20 17:45:54,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:45:54,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760465331] [2024-06-20 17:45:54,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:45:54,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:45:55,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:45:55,359 INFO 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 17:45:55,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:45:55,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760465331] [2024-06-20 17:45:55,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760465331] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:45:55,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:45:55,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 17:45:55,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025669549] [2024-06-20 17:45:55,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:45:55,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 17:45:55,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:45:55,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 17:45:55,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-20 17:45:55,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 17:45:55,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 34 transitions, 98 flow. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:55,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:45:55,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 17:45:55,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:45:55,588 INFO L124 PetriNetUnfolderBase]: 754/1256 cut-off events. [2024-06-20 17:45:55,589 INFO L125 PetriNetUnfolderBase]: For 195/205 co-relation queries the response was YES. [2024-06-20 17:45:55,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2858 conditions, 1256 events. 754/1256 cut-off events. For 195/205 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 6202 event pairs, 318 based on Foata normal form. 6/1258 useless extension candidates. Maximal degree in co-relation 2846. Up to 1124 conditions per place. [2024-06-20 17:45:55,595 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 40 selfloop transitions, 7 changer transitions 0/55 dead transitions. [2024-06-20 17:45:55,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 55 transitions, 250 flow [2024-06-20 17:45:55,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 17:45:55,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 17:45:55,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 107 transitions. [2024-06-20 17:45:55,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.66875 [2024-06-20 17:45:55,599 INFO L175 Difference]: Start difference. First operand has 41 places, 34 transitions, 98 flow. Second operand 4 states and 107 transitions. [2024-06-20 17:45:55,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 55 transitions, 250 flow [2024-06-20 17:45:55,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 55 transitions, 244 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-20 17:45:55,602 INFO L231 Difference]: Finished difference. Result has 45 places, 40 transitions, 150 flow [2024-06-20 17:45:55,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=150, PETRI_PLACES=45, PETRI_TRANSITIONS=40} [2024-06-20 17:45:55,603 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 4 predicate places. [2024-06-20 17:45:55,603 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 40 transitions, 150 flow [2024-06-20 17:45:55,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:55,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:45:55,604 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:45:55,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-20 17:45:55,606 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:45:55,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:45:55,608 INFO L85 PathProgramCache]: Analyzing trace with hash 1101657832, now seen corresponding path program 1 times [2024-06-20 17:45:55,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:45:55,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278506281] [2024-06-20 17:45:55,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:45:55,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:45:55,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:45:55,978 INFO 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 17:45:55,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:45:55,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278506281] [2024-06-20 17:45:55,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278506281] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:45:55,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:45:55,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 17:45:55,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361706215] [2024-06-20 17:45:55,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:45:55,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 17:45:55,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:45:55,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 17:45:55,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 17:45:56,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 17:45:56,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 40 transitions, 150 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:56,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:45:56,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 17:45:56,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:45:56,207 INFO L124 PetriNetUnfolderBase]: 745/1241 cut-off events. [2024-06-20 17:45:56,207 INFO L125 PetriNetUnfolderBase]: For 594/630 co-relation queries the response was YES. [2024-06-20 17:45:56,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3172 conditions, 1241 events. 745/1241 cut-off events. For 594/630 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 6088 event pairs, 218 based on Foata normal form. 19/1256 useless extension candidates. Maximal degree in co-relation 3157. Up to 1079 conditions per place. [2024-06-20 17:45:56,214 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 44 selfloop transitions, 9 changer transitions 0/61 dead transitions. [2024-06-20 17:45:56,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 61 transitions, 310 flow [2024-06-20 17:45:56,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 17:45:56,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 17:45:56,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 128 transitions. [2024-06-20 17:45:56,215 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.64 [2024-06-20 17:45:56,216 INFO L175 Difference]: Start difference. First operand has 45 places, 40 transitions, 150 flow. Second operand 5 states and 128 transitions. [2024-06-20 17:45:56,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 61 transitions, 310 flow [2024-06-20 17:45:56,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 61 transitions, 308 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-20 17:45:56,218 INFO L231 Difference]: Finished difference. Result has 49 places, 41 transitions, 181 flow [2024-06-20 17:45:56,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=181, PETRI_PLACES=49, PETRI_TRANSITIONS=41} [2024-06-20 17:45:56,219 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 8 predicate places. [2024-06-20 17:45:56,219 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 41 transitions, 181 flow [2024-06-20 17:45:56,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:45:56,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:45:56,219 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:45:56,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-20 17:45:56,220 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:45:56,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:45:56,220 INFO L85 PathProgramCache]: Analyzing trace with hash -2113468487, now seen corresponding path program 1 times [2024-06-20 17:45:56,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:45:56,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957217595] [2024-06-20 17:45:56,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:45:56,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:45:56,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:45:56,590 INFO 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 17:45:56,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:45:56,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957217595] [2024-06-20 17:45:56,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957217595] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:45:56,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:45:56,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 17:45:56,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026324655] [2024-06-20 17:45:56,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:45:56,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 17:45:56,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:45:56,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 17:45:56,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-20 17:45:56,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 17:45:56,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 41 transitions, 181 flow. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states 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 17:45:56,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:45:56,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 17:45:56,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:45:56,770 INFO L124 PetriNetUnfolderBase]: 697/1162 cut-off events. [2024-06-20 17:45:56,770 INFO L125 PetriNetUnfolderBase]: For 1029/1029 co-relation queries the response was YES. [2024-06-20 17:45:56,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3245 conditions, 1162 events. 697/1162 cut-off events. For 1029/1029 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 5827 event pairs, 308 based on Foata normal form. 2/1162 useless extension candidates. Maximal degree in co-relation 3227. Up to 1047 conditions per place. [2024-06-20 17:45:56,776 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 44 selfloop transitions, 8 changer transitions 0/60 dead transitions. [2024-06-20 17:45:56,777 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 60 transitions, 350 flow [2024-06-20 17:45:56,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 17:45:56,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 17:45:56,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 102 transitions. [2024-06-20 17:45:56,778 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6375 [2024-06-20 17:45:56,778 INFO L175 Difference]: Start difference. First operand has 49 places, 41 transitions, 181 flow. Second operand 4 states and 102 transitions. [2024-06-20 17:45:56,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 60 transitions, 350 flow [2024-06-20 17:45:56,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 60 transitions, 325 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-20 17:45:56,785 INFO L231 Difference]: Finished difference. Result has 51 places, 48 transitions, 229 flow [2024-06-20 17:45:56,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=229, PETRI_PLACES=51, PETRI_TRANSITIONS=48} [2024-06-20 17:45:56,787 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 10 predicate places. [2024-06-20 17:45:56,787 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 48 transitions, 229 flow [2024-06-20 17:45:56,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states 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 17:45:56,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:45:56,788 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:45:56,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-20 17:45:56,788 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:45:56,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:45:56,788 INFO L85 PathProgramCache]: Analyzing trace with hash 298840478, now seen corresponding path program 1 times [2024-06-20 17:45:56,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:45:56,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159381083] [2024-06-20 17:45:56,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:45:56,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:45:56,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:45:57,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:45:57,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:45:57,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159381083] [2024-06-20 17:45:57,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159381083] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:45:57,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:45:57,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 17:45:57,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263490139] [2024-06-20 17:45:57,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:45:57,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 17:45:57,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:45:57,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 17:45:57,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 17:45:57,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 17:45:57,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 48 transitions, 229 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 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 17:45:57,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:45:57,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 17:45:57,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:45:57,418 INFO L124 PetriNetUnfolderBase]: 826/1387 cut-off events. [2024-06-20 17:45:57,418 INFO L125 PetriNetUnfolderBase]: For 1901/1945 co-relation queries the response was YES. [2024-06-20 17:45:57,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4179 conditions, 1387 events. 826/1387 cut-off events. For 1901/1945 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 7004 event pairs, 293 based on Foata normal form. 16/1383 useless extension candidates. Maximal degree in co-relation 4159. Up to 1177 conditions per place. [2024-06-20 17:45:57,425 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 47 selfloop transitions, 18 changer transitions 0/75 dead transitions. [2024-06-20 17:45:57,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 75 transitions, 459 flow [2024-06-20 17:45:57,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 17:45:57,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 17:45:57,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 131 transitions. [2024-06-20 17:45:57,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.655 [2024-06-20 17:45:57,427 INFO L175 Difference]: Start difference. First operand has 51 places, 48 transitions, 229 flow. Second operand 5 states and 131 transitions. [2024-06-20 17:45:57,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 75 transitions, 459 flow [2024-06-20 17:45:57,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 75 transitions, 457 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-20 17:45:57,430 INFO L231 Difference]: Finished difference. Result has 56 places, 54 transitions, 309 flow [2024-06-20 17:45:57,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=227, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=309, PETRI_PLACES=56, PETRI_TRANSITIONS=54} [2024-06-20 17:45:57,430 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 15 predicate places. [2024-06-20 17:45:57,430 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 54 transitions, 309 flow [2024-06-20 17:45:57,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 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 17:45:57,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:45:57,431 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:45:57,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-20 17:45:57,431 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:45:57,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:45:57,432 INFO L85 PathProgramCache]: Analyzing trace with hash 2136706782, now seen corresponding path program 2 times [2024-06-20 17:45:57,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:45:57,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140764288] [2024-06-20 17:45:57,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:45:57,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:45:57,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:45:57,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:45:57,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:45:57,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140764288] [2024-06-20 17:45:57,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140764288] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:45:57,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:45:57,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 17:45:57,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896947166] [2024-06-20 17:45:57,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:45:57,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 17:45:57,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:45:57,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 17:45:57,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-20 17:45:57,838 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 17:45:57,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 54 transitions, 309 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 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 17:45:57,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:45:57,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 17:45:57,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:45:58,032 INFO L124 PetriNetUnfolderBase]: 821/1380 cut-off events. [2024-06-20 17:45:58,032 INFO L125 PetriNetUnfolderBase]: For 3008/3070 co-relation queries the response was YES. [2024-06-20 17:45:58,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4570 conditions, 1380 events. 821/1380 cut-off events. For 3008/3070 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 6966 event pairs, 293 based on Foata normal form. 18/1379 useless extension candidates. Maximal degree in co-relation 4547. Up to 1181 conditions per place. [2024-06-20 17:45:58,039 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 44 selfloop transitions, 15 changer transitions 0/69 dead transitions. [2024-06-20 17:45:58,039 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 69 transitions, 465 flow [2024-06-20 17:45:58,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 17:45:58,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 17:45:58,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 107 transitions. [2024-06-20 17:45:58,040 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.66875 [2024-06-20 17:45:58,040 INFO L175 Difference]: Start difference. First operand has 56 places, 54 transitions, 309 flow. Second operand 4 states and 107 transitions. [2024-06-20 17:45:58,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 69 transitions, 465 flow [2024-06-20 17:45:58,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 69 transitions, 440 flow, removed 8 selfloop flow, removed 1 redundant places. [2024-06-20 17:45:58,045 INFO L231 Difference]: Finished difference. Result has 59 places, 54 transitions, 328 flow [2024-06-20 17:45:58,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=328, PETRI_PLACES=59, PETRI_TRANSITIONS=54} [2024-06-20 17:45:58,045 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 18 predicate places. [2024-06-20 17:45:58,046 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 54 transitions, 328 flow [2024-06-20 17:45:58,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 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 17:45:58,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:45:58,046 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:45:58,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-20 17:45:58,046 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:45:58,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:45:58,047 INFO L85 PathProgramCache]: Analyzing trace with hash -1466029098, now seen corresponding path program 1 times [2024-06-20 17:45:58,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:45:58,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240191904] [2024-06-20 17:45:58,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:45:58,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:45:58,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:45:58,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:45:58,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:45:58,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240191904] [2024-06-20 17:45:58,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240191904] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:45:58,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:45:58,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 17:45:58,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972709610] [2024-06-20 17:45:58,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:45:58,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 17:45:58,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:45:58,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 17:45:58,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 17:45:58,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 17:45:58,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 54 transitions, 328 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 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 17:45:58,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:45:58,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 17:45:58,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:45:58,556 INFO L124 PetriNetUnfolderBase]: 697/1172 cut-off events. [2024-06-20 17:45:58,556 INFO L125 PetriNetUnfolderBase]: For 3080/3082 co-relation queries the response was YES. [2024-06-20 17:45:58,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4054 conditions, 1172 events. 697/1172 cut-off events. For 3080/3082 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 5931 event pairs, 278 based on Foata normal form. 6/1176 useless extension candidates. Maximal degree in co-relation 4029. Up to 1029 conditions per place. [2024-06-20 17:45:58,564 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 55 selfloop transitions, 10 changer transitions 0/73 dead transitions. [2024-06-20 17:45:58,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 73 transitions, 513 flow [2024-06-20 17:45:58,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 17:45:58,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 17:45:58,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 124 transitions. [2024-06-20 17:45:58,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.62 [2024-06-20 17:45:58,566 INFO L175 Difference]: Start difference. First operand has 59 places, 54 transitions, 328 flow. Second operand 5 states and 124 transitions. [2024-06-20 17:45:58,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 73 transitions, 513 flow [2024-06-20 17:45:58,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 73 transitions, 483 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-20 17:45:58,570 INFO L231 Difference]: Finished difference. Result has 61 places, 56 transitions, 339 flow [2024-06-20 17:45:58,570 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=298, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=339, PETRI_PLACES=61, PETRI_TRANSITIONS=56} [2024-06-20 17:45:58,571 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 20 predicate places. [2024-06-20 17:45:58,571 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 56 transitions, 339 flow [2024-06-20 17:45:58,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 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 17:45:58,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:45:58,572 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:45:58,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-20 17:45:58,572 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:45:58,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:45:58,572 INFO L85 PathProgramCache]: Analyzing trace with hash 674120920, now seen corresponding path program 1 times [2024-06-20 17:45:58,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:45:58,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621131971] [2024-06-20 17:45:58,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:45:58,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:45:58,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:45:58,904 INFO 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 17:45:58,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:45:58,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621131971] [2024-06-20 17:45:58,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621131971] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:45:58,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:45:58,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:45:58,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168374107] [2024-06-20 17:45:58,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:45:58,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:45:58,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:45:58,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:45:58,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:45:58,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:45:58,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 56 transitions, 339 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 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 17:45:58,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:45:58,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:45:58,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:45:59,143 INFO L124 PetriNetUnfolderBase]: 888/1471 cut-off events. [2024-06-20 17:45:59,144 INFO L125 PetriNetUnfolderBase]: For 4342/4346 co-relation queries the response was YES. [2024-06-20 17:45:59,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5175 conditions, 1471 events. 888/1471 cut-off events. For 4342/4346 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 7289 event pairs, 323 based on Foata normal form. 6/1474 useless extension candidates. Maximal degree in co-relation 5149. Up to 1228 conditions per place. [2024-06-20 17:45:59,154 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 69 selfloop transitions, 19 changer transitions 0/95 dead transitions. [2024-06-20 17:45:59,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 95 transitions, 689 flow [2024-06-20 17:45:59,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:45:59,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:45:59,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-20 17:45:59,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-20 17:45:59,158 INFO L175 Difference]: Start difference. First operand has 61 places, 56 transitions, 339 flow. Second operand 6 states and 150 transitions. [2024-06-20 17:45:59,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 95 transitions, 689 flow [2024-06-20 17:45:59,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 95 transitions, 666 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-20 17:45:59,163 INFO L231 Difference]: Finished difference. Result has 66 places, 68 transitions, 465 flow [2024-06-20 17:45:59,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=465, PETRI_PLACES=66, PETRI_TRANSITIONS=68} [2024-06-20 17:45:59,164 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 25 predicate places. [2024-06-20 17:45:59,164 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 68 transitions, 465 flow [2024-06-20 17:45:59,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 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 17:45:59,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:45:59,165 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:45:59,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-20 17:45:59,165 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:45:59,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:45:59,165 INFO L85 PathProgramCache]: Analyzing trace with hash 1813407076, now seen corresponding path program 2 times [2024-06-20 17:45:59,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:45:59,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400103221] [2024-06-20 17:45:59,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:45:59,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:45:59,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:45:59,492 INFO 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 17:45:59,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:45:59,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400103221] [2024-06-20 17:45:59,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400103221] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:45:59,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:45:59,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:45:59,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374718922] [2024-06-20 17:45:59,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:45:59,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:45:59,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:45:59,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:45:59,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:45:59,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:45:59,551 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 68 transitions, 465 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 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 17:45:59,551 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:45:59,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:45:59,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:45:59,764 INFO L124 PetriNetUnfolderBase]: 899/1494 cut-off events. [2024-06-20 17:45:59,764 INFO L125 PetriNetUnfolderBase]: For 5627/5637 co-relation queries the response was YES. [2024-06-20 17:45:59,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5642 conditions, 1494 events. 899/1494 cut-off events. For 5627/5637 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 7456 event pairs, 310 based on Foata normal form. 12/1505 useless extension candidates. Maximal degree in co-relation 5613. Up to 1258 conditions per place. [2024-06-20 17:45:59,773 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 78 selfloop transitions, 19 changer transitions 0/104 dead transitions. [2024-06-20 17:45:59,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 104 transitions, 809 flow [2024-06-20 17:45:59,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:45:59,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:45:59,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-20 17:45:59,775 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-06-20 17:45:59,775 INFO L175 Difference]: Start difference. First operand has 66 places, 68 transitions, 465 flow. Second operand 7 states and 170 transitions. [2024-06-20 17:45:59,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 104 transitions, 809 flow [2024-06-20 17:45:59,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 104 transitions, 773 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-20 17:45:59,782 INFO L231 Difference]: Finished difference. Result has 72 places, 73 transitions, 523 flow [2024-06-20 17:45:59,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=433, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=523, PETRI_PLACES=72, PETRI_TRANSITIONS=73} [2024-06-20 17:45:59,783 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 31 predicate places. [2024-06-20 17:45:59,783 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 73 transitions, 523 flow [2024-06-20 17:45:59,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 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 17:45:59,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:45:59,784 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:45:59,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-20 17:45:59,784 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:45:59,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:45:59,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1813401496, now seen corresponding path program 3 times [2024-06-20 17:45:59,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:45:59,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562972576] [2024-06-20 17:45:59,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:45:59,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:45:59,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:46:00,093 INFO 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 17:46:00,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:46:00,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562972576] [2024-06-20 17:46:00,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562972576] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:46:00,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:46:00,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:46:00,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958512329] [2024-06-20 17:46:00,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:46:00,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:46:00,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:46:00,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:46:00,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:46:00,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:46:00,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 73 transitions, 523 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 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 17:46:00,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:46:00,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:46:00,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:46:00,438 INFO L124 PetriNetUnfolderBase]: 894/1485 cut-off events. [2024-06-20 17:46:00,439 INFO L125 PetriNetUnfolderBase]: For 6651/6657 co-relation queries the response was YES. [2024-06-20 17:46:00,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5743 conditions, 1485 events. 894/1485 cut-off events. For 6651/6657 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 7351 event pairs, 323 based on Foata normal form. 8/1490 useless extension candidates. Maximal degree in co-relation 5712. Up to 1253 conditions per place. [2024-06-20 17:46:00,456 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 68 selfloop transitions, 18 changer transitions 0/93 dead transitions. [2024-06-20 17:46:00,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 93 transitions, 748 flow [2024-06-20 17:46:00,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 17:46:00,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 17:46:00,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 127 transitions. [2024-06-20 17:46:00,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.635 [2024-06-20 17:46:00,458 INFO L175 Difference]: Start difference. First operand has 72 places, 73 transitions, 523 flow. Second operand 5 states and 127 transitions. [2024-06-20 17:46:00,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 93 transitions, 748 flow [2024-06-20 17:46:00,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 93 transitions, 694 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-20 17:46:00,468 INFO L231 Difference]: Finished difference. Result has 73 places, 73 transitions, 513 flow [2024-06-20 17:46:00,469 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=469, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=513, PETRI_PLACES=73, PETRI_TRANSITIONS=73} [2024-06-20 17:46:00,470 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 32 predicate places. [2024-06-20 17:46:00,470 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 73 transitions, 513 flow [2024-06-20 17:46:00,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 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 17:46:00,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:46:00,470 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:46:00,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-20 17:46:00,471 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:46:00,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:46:00,471 INFO L85 PathProgramCache]: Analyzing trace with hash -646658297, now seen corresponding path program 1 times [2024-06-20 17:46:00,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:46:00,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192686742] [2024-06-20 17:46:00,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:46:00,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:46:00,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:46:00,836 INFO 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 17:46:00,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:46:00,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192686742] [2024-06-20 17:46:00,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192686742] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:46:00,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:46:00,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 17:46:00,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345717181] [2024-06-20 17:46:00,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:46:00,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 17:46:00,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:46:00,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 17:46:00,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-20 17:46:00,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 17:46:00,862 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 73 transitions, 513 flow. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 0 states 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 17:46:00,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:46:00,862 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 17:46:00,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:46:01,003 INFO L124 PetriNetUnfolderBase]: 832/1381 cut-off events. [2024-06-20 17:46:01,007 INFO L125 PetriNetUnfolderBase]: For 7436/7438 co-relation queries the response was YES. [2024-06-20 17:46:01,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5517 conditions, 1381 events. 832/1381 cut-off events. For 7436/7438 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 6895 event pairs, 278 based on Foata normal form. 3/1370 useless extension candidates. Maximal degree in co-relation 5485. Up to 1228 conditions per place. [2024-06-20 17:46:01,020 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 69 selfloop transitions, 9 changer transitions 0/90 dead transitions. [2024-06-20 17:46:01,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 90 transitions, 739 flow [2024-06-20 17:46:01,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 17:46:01,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 17:46:01,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 98 transitions. [2024-06-20 17:46:01,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6125 [2024-06-20 17:46:01,022 INFO L175 Difference]: Start difference. First operand has 73 places, 73 transitions, 513 flow. Second operand 4 states and 98 transitions. [2024-06-20 17:46:01,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 90 transitions, 739 flow [2024-06-20 17:46:01,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 90 transitions, 701 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-20 17:46:01,033 INFO L231 Difference]: Finished difference. Result has 74 places, 81 transitions, 565 flow [2024-06-20 17:46:01,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=477, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=565, PETRI_PLACES=74, PETRI_TRANSITIONS=81} [2024-06-20 17:46:01,033 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 33 predicate places. [2024-06-20 17:46:01,033 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 81 transitions, 565 flow [2024-06-20 17:46:01,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 0 states 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 17:46:01,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:46:01,034 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:46:01,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-20 17:46:01,035 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:46:01,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:46:01,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1363176749, now seen corresponding path program 1 times [2024-06-20 17:46:01,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:46:01,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341261533] [2024-06-20 17:46:01,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:46:01,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:46:01,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:46:01,380 INFO 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 17:46:01,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:46:01,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341261533] [2024-06-20 17:46:01,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341261533] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:46:01,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:46:01,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:46:01,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276584321] [2024-06-20 17:46:01,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:46:01,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:46:01,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:46:01,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:46:01,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:46:01,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 17:46:01,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 81 transitions, 565 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states 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 17:46:01,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:46:01,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 17:46:01,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:46:01,619 INFO L124 PetriNetUnfolderBase]: 854/1423 cut-off events. [2024-06-20 17:46:01,620 INFO L125 PetriNetUnfolderBase]: For 9361/9373 co-relation queries the response was YES. [2024-06-20 17:46:01,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6021 conditions, 1423 events. 854/1423 cut-off events. For 9361/9373 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 7210 event pairs, 180 based on Foata normal form. 14/1388 useless extension candidates. Maximal degree in co-relation 5987. Up to 1100 conditions per place. [2024-06-20 17:46:01,628 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 63 selfloop transitions, 32 changer transitions 0/111 dead transitions. [2024-06-20 17:46:01,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 111 transitions, 897 flow [2024-06-20 17:46:01,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:46:01,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:46:01,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-20 17:46:01,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6416666666666667 [2024-06-20 17:46:01,631 INFO L175 Difference]: Start difference. First operand has 74 places, 81 transitions, 565 flow. Second operand 6 states and 154 transitions. [2024-06-20 17:46:01,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 111 transitions, 897 flow [2024-06-20 17:46:01,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 111 transitions, 893 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-20 17:46:01,640 INFO L231 Difference]: Finished difference. Result has 80 places, 85 transitions, 672 flow [2024-06-20 17:46:01,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=561, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=672, PETRI_PLACES=80, PETRI_TRANSITIONS=85} [2024-06-20 17:46:01,642 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 39 predicate places. [2024-06-20 17:46:01,642 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 85 transitions, 672 flow [2024-06-20 17:46:01,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states 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 17:46:01,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:46:01,642 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:46:01,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-20 17:46:01,643 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:46:01,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:46:01,643 INFO L85 PathProgramCache]: Analyzing trace with hash -2089820353, now seen corresponding path program 2 times [2024-06-20 17:46:01,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:46:01,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691878180] [2024-06-20 17:46:01,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:46:01,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:46:01,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:46:01,963 INFO 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 17:46:01,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:46:01,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691878180] [2024-06-20 17:46:01,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691878180] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:46:01,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:46:01,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:46:01,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143154055] [2024-06-20 17:46:01,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:46:01,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:46:01,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:46:01,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:46:01,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:46:02,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 17:46:02,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 85 transitions, 672 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states 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 17:46:02,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:46:02,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 17:46:02,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:46:02,255 INFO L124 PetriNetUnfolderBase]: 871/1450 cut-off events. [2024-06-20 17:46:02,256 INFO L125 PetriNetUnfolderBase]: For 11696/11715 co-relation queries the response was YES. [2024-06-20 17:46:02,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6500 conditions, 1450 events. 871/1450 cut-off events. For 11696/11715 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 7372 event pairs, 252 based on Foata normal form. 12/1409 useless extension candidates. Maximal degree in co-relation 6463. Up to 1198 conditions per place. [2024-06-20 17:46:02,264 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 64 selfloop transitions, 30 changer transitions 0/110 dead transitions. [2024-06-20 17:46:02,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 110 transitions, 940 flow [2024-06-20 17:46:02,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:46:02,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:46:02,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-20 17:46:02,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6291666666666667 [2024-06-20 17:46:02,265 INFO L175 Difference]: Start difference. First operand has 80 places, 85 transitions, 672 flow. Second operand 6 states and 151 transitions. [2024-06-20 17:46:02,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 110 transitions, 940 flow [2024-06-20 17:46:02,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 110 transitions, 888 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-20 17:46:02,277 INFO L231 Difference]: Finished difference. Result has 84 places, 87 transitions, 714 flow [2024-06-20 17:46:02,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=624, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=714, PETRI_PLACES=84, PETRI_TRANSITIONS=87} [2024-06-20 17:46:02,278 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 43 predicate places. [2024-06-20 17:46:02,278 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 87 transitions, 714 flow [2024-06-20 17:46:02,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states 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 17:46:02,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:46:02,278 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:46:02,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-20 17:46:02,279 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:46:02,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:46:02,279 INFO L85 PathProgramCache]: Analyzing trace with hash 380867293, now seen corresponding path program 3 times [2024-06-20 17:46:02,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:46:02,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72561600] [2024-06-20 17:46:02,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:46:02,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:46:02,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:46:02,608 INFO 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 17:46:02,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:46:02,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72561600] [2024-06-20 17:46:02,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72561600] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:46:02,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:46:02,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:46:02,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694444315] [2024-06-20 17:46:02,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:46:02,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:46:02,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:46:02,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:46:02,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:46:02,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 17:46:02,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 87 transitions, 714 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states 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 17:46:02,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:46:02,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 17:46:02,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:46:02,896 INFO L124 PetriNetUnfolderBase]: 859/1434 cut-off events. [2024-06-20 17:46:02,896 INFO L125 PetriNetUnfolderBase]: For 12730/12749 co-relation queries the response was YES. [2024-06-20 17:46:02,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6516 conditions, 1434 events. 859/1434 cut-off events. For 12730/12749 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 7272 event pairs, 175 based on Foata normal form. 19/1403 useless extension candidates. Maximal degree in co-relation 6477. Up to 1161 conditions per place. [2024-06-20 17:46:02,905 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 63 selfloop transitions, 27 changer transitions 0/106 dead transitions. [2024-06-20 17:46:02,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 106 transitions, 942 flow [2024-06-20 17:46:02,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 17:46:02,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 17:46:02,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 130 transitions. [2024-06-20 17:46:02,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-06-20 17:46:02,907 INFO L175 Difference]: Start difference. First operand has 84 places, 87 transitions, 714 flow. Second operand 5 states and 130 transitions. [2024-06-20 17:46:02,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 106 transitions, 942 flow [2024-06-20 17:46:02,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 106 transitions, 868 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-20 17:46:02,921 INFO L231 Difference]: Finished difference. Result has 85 places, 87 transitions, 706 flow [2024-06-20 17:46:02,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=640, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=706, PETRI_PLACES=85, PETRI_TRANSITIONS=87} [2024-06-20 17:46:02,922 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 44 predicate places. [2024-06-20 17:46:02,922 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 87 transitions, 706 flow [2024-06-20 17:46:02,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states 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 17:46:02,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:46:02,922 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:46:02,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-20 17:46:02,923 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:46:02,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:46:02,923 INFO L85 PathProgramCache]: Analyzing trace with hash -361794759, now seen corresponding path program 1 times [2024-06-20 17:46:02,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:46:02,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366545592] [2024-06-20 17:46:02,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:46:02,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:46:02,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:46:03,222 INFO 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 17:46:03,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:46:03,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366545592] [2024-06-20 17:46:03,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366545592] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:46:03,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:46:03,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:46:03,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381782136] [2024-06-20 17:46:03,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:46:03,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:46:03,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:46:03,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:46:03,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:46:03,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:46:03,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 87 transitions, 706 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states 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 17:46:03,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:46:03,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:46:03,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:46:03,513 INFO L124 PetriNetUnfolderBase]: 1027/1704 cut-off events. [2024-06-20 17:46:03,514 INFO L125 PetriNetUnfolderBase]: For 14624/14630 co-relation queries the response was YES. [2024-06-20 17:46:03,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7467 conditions, 1704 events. 1027/1704 cut-off events. For 14624/14630 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 8780 event pairs, 220 based on Foata normal form. 18/1720 useless extension candidates. Maximal degree in co-relation 7427. Up to 1134 conditions per place. [2024-06-20 17:46:03,523 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 100 selfloop transitions, 26 changer transitions 0/133 dead transitions. [2024-06-20 17:46:03,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 133 transitions, 1174 flow [2024-06-20 17:46:03,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:46:03,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:46:03,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-20 17:46:03,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6285714285714286 [2024-06-20 17:46:03,525 INFO L175 Difference]: Start difference. First operand has 85 places, 87 transitions, 706 flow. Second operand 7 states and 176 transitions. [2024-06-20 17:46:03,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 133 transitions, 1174 flow [2024-06-20 17:46:03,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 133 transitions, 1105 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-20 17:46:03,540 INFO L231 Difference]: Finished difference. Result has 90 places, 92 transitions, 753 flow [2024-06-20 17:46:03,541 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=644, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=753, PETRI_PLACES=90, PETRI_TRANSITIONS=92} [2024-06-20 17:46:03,542 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 49 predicate places. [2024-06-20 17:46:03,542 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 92 transitions, 753 flow [2024-06-20 17:46:03,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states 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 17:46:03,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:46:03,542 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:46:03,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-20 17:46:03,542 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:46:03,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:46:03,543 INFO L85 PathProgramCache]: Analyzing trace with hash 504326899, now seen corresponding path program 2 times [2024-06-20 17:46:03,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:46:03,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673302234] [2024-06-20 17:46:03,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:46:03,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:46:03,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:46:03,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:46:03,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:46:03,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673302234] [2024-06-20 17:46:03,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673302234] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:46:03,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:46:03,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:46:03,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032222214] [2024-06-20 17:46:03,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:46:03,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:46:03,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:46:03,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:46:03,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:46:03,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:46:03,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 92 transitions, 753 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states 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 17:46:03,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:46:03,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:46:03,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:46:04,185 INFO L124 PetriNetUnfolderBase]: 1085/1812 cut-off events. [2024-06-20 17:46:04,185 INFO L125 PetriNetUnfolderBase]: For 17010/17016 co-relation queries the response was YES. [2024-06-20 17:46:04,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8057 conditions, 1812 events. 1085/1812 cut-off events. For 17010/17016 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 9593 event pairs, 325 based on Foata normal form. 22/1832 useless extension candidates. Maximal degree in co-relation 8014. Up to 1466 conditions per place. [2024-06-20 17:46:04,196 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 95 selfloop transitions, 24 changer transitions 0/126 dead transitions. [2024-06-20 17:46:04,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 126 transitions, 1098 flow [2024-06-20 17:46:04,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:46:04,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:46:04,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-20 17:46:04,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6107142857142858 [2024-06-20 17:46:04,198 INFO L175 Difference]: Start difference. First operand has 90 places, 92 transitions, 753 flow. Second operand 7 states and 171 transitions. [2024-06-20 17:46:04,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 126 transitions, 1098 flow [2024-06-20 17:46:04,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 126 transitions, 1068 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-20 17:46:04,217 INFO L231 Difference]: Finished difference. Result has 95 places, 93 transitions, 789 flow [2024-06-20 17:46:04,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=723, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=789, PETRI_PLACES=95, PETRI_TRANSITIONS=93} [2024-06-20 17:46:04,217 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 54 predicate places. [2024-06-20 17:46:04,218 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 93 transitions, 789 flow [2024-06-20 17:46:04,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states 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 17:46:04,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:46:04,219 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:46:04,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-20 17:46:04,221 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:46:04,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:46:04,221 INFO L85 PathProgramCache]: Analyzing trace with hash -273228999, now seen corresponding path program 3 times [2024-06-20 17:46:04,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:46:04,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942333037] [2024-06-20 17:46:04,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:46:04,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:46:04,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:46:04,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:46:04,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:46:04,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942333037] [2024-06-20 17:46:04,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942333037] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:46:04,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:46:04,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:46:04,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129433314] [2024-06-20 17:46:04,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:46:04,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:46:04,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:46:04,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:46:04,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:46:04,608 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:46:04,609 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 93 transitions, 789 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states 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 17:46:04,609 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:46:04,609 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:46:04,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:46:04,886 INFO L124 PetriNetUnfolderBase]: 1126/1883 cut-off events. [2024-06-20 17:46:04,886 INFO L125 PetriNetUnfolderBase]: For 18782/18788 co-relation queries the response was YES. [2024-06-20 17:46:04,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8549 conditions, 1883 events. 1126/1883 cut-off events. For 18782/18788 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 10071 event pairs, 318 based on Foata normal form. 18/1899 useless extension candidates. Maximal degree in co-relation 8504. Up to 1450 conditions per place. [2024-06-20 17:46:04,899 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 99 selfloop transitions, 26 changer transitions 0/132 dead transitions. [2024-06-20 17:46:04,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 132 transitions, 1174 flow [2024-06-20 17:46:04,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:46:04,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:46:04,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-20 17:46:04,901 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6214285714285714 [2024-06-20 17:46:04,901 INFO L175 Difference]: Start difference. First operand has 95 places, 93 transitions, 789 flow. Second operand 7 states and 174 transitions. [2024-06-20 17:46:04,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 132 transitions, 1174 flow [2024-06-20 17:46:04,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 132 transitions, 1127 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-20 17:46:04,922 INFO L231 Difference]: Finished difference. Result has 98 places, 96 transitions, 837 flow [2024-06-20 17:46:04,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=742, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=837, PETRI_PLACES=98, PETRI_TRANSITIONS=96} [2024-06-20 17:46:04,922 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 57 predicate places. [2024-06-20 17:46:04,923 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 96 transitions, 837 flow [2024-06-20 17:46:04,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states 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 17:46:04,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:46:04,923 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:46:04,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-20 17:46:04,923 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:46:04,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:46:04,924 INFO L85 PathProgramCache]: Analyzing trace with hash -1077867241, now seen corresponding path program 4 times [2024-06-20 17:46:04,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:46:04,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604770236] [2024-06-20 17:46:04,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:46:04,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:46:04,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:46:05,264 INFO 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 17:46:05,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:46:05,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604770236] [2024-06-20 17:46:05,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604770236] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:46:05,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:46:05,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:46:05,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574281096] [2024-06-20 17:46:05,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:46:05,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:46:05,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:46:05,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:46:05,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:46:05,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:46:05,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 96 transitions, 837 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states 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 17:46:05,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:46:05,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:46:05,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:46:05,609 INFO L124 PetriNetUnfolderBase]: 1184/1991 cut-off events. [2024-06-20 17:46:05,610 INFO L125 PetriNetUnfolderBase]: For 21864/21870 co-relation queries the response was YES. [2024-06-20 17:46:05,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9128 conditions, 1991 events. 1184/1991 cut-off events. For 21864/21870 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 10833 event pairs, 352 based on Foata normal form. 22/2011 useless extension candidates. Maximal degree in co-relation 9081. Up to 1653 conditions per place. [2024-06-20 17:46:05,622 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 100 selfloop transitions, 19 changer transitions 0/126 dead transitions. [2024-06-20 17:46:05,623 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 126 transitions, 1176 flow [2024-06-20 17:46:05,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:46:05,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:46:05,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-20 17:46:05,624 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-20 17:46:05,624 INFO L175 Difference]: Start difference. First operand has 98 places, 96 transitions, 837 flow. Second operand 6 states and 150 transitions. [2024-06-20 17:46:05,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 126 transitions, 1176 flow [2024-06-20 17:46:05,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 126 transitions, 1144 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-20 17:46:05,651 INFO L231 Difference]: Finished difference. Result has 101 places, 97 transitions, 865 flow [2024-06-20 17:46:05,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=805, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=865, PETRI_PLACES=101, PETRI_TRANSITIONS=97} [2024-06-20 17:46:05,652 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 60 predicate places. [2024-06-20 17:46:05,652 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 97 transitions, 865 flow [2024-06-20 17:46:05,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states 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 17:46:05,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:46:05,653 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:46:05,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-20 17:46:05,653 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:46:05,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:46:05,653 INFO L85 PathProgramCache]: Analyzing trace with hash -1078015111, now seen corresponding path program 5 times [2024-06-20 17:46:05,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:46:05,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614009280] [2024-06-20 17:46:05,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:46:05,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:46:05,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:46:05,968 INFO 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 17:46:05,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:46:05,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614009280] [2024-06-20 17:46:05,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614009280] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:46:05,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:46:05,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:46:05,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220554060] [2024-06-20 17:46:05,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:46:05,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:46:05,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:46:05,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:46:05,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:46:06,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:46:06,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 97 transitions, 865 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states 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 17:46:06,026 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:46:06,026 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:46:06,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:46:06,322 INFO L124 PetriNetUnfolderBase]: 1225/2062 cut-off events. [2024-06-20 17:46:06,322 INFO L125 PetriNetUnfolderBase]: For 23756/23762 co-relation queries the response was YES. [2024-06-20 17:46:06,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9608 conditions, 2062 events. 1225/2062 cut-off events. For 23756/23762 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 11370 event pairs, 267 based on Foata normal form. 18/2078 useless extension candidates. Maximal degree in co-relation 9559. Up to 1479 conditions per place. [2024-06-20 17:46:06,336 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 104 selfloop transitions, 22 changer transitions 0/133 dead transitions. [2024-06-20 17:46:06,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 133 transitions, 1309 flow [2024-06-20 17:46:06,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:46:06,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:46:06,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-20 17:46:06,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6458333333333334 [2024-06-20 17:46:06,337 INFO L175 Difference]: Start difference. First operand has 101 places, 97 transitions, 865 flow. Second operand 6 states and 155 transitions. [2024-06-20 17:46:06,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 133 transitions, 1309 flow [2024-06-20 17:46:06,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 133 transitions, 1268 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-20 17:46:06,362 INFO L231 Difference]: Finished difference. Result has 104 places, 99 transitions, 906 flow [2024-06-20 17:46:06,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=824, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=906, PETRI_PLACES=104, PETRI_TRANSITIONS=99} [2024-06-20 17:46:06,363 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 63 predicate places. [2024-06-20 17:46:06,363 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 99 transitions, 906 flow [2024-06-20 17:46:06,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states 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 17:46:06,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:46:06,363 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:46:06,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-20 17:46:06,365 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:46:06,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:46:06,365 INFO L85 PathProgramCache]: Analyzing trace with hash -1072504861, now seen corresponding path program 6 times [2024-06-20 17:46:06,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:46:06,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405666774] [2024-06-20 17:46:06,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:46:06,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:46:06,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:46:06,695 INFO 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 17:46:06,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:46:06,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405666774] [2024-06-20 17:46:06,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405666774] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:46:06,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:46:06,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:46:06,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880722549] [2024-06-20 17:46:06,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:46:06,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:46:06,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:46:06,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:46:06,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:46:06,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:46:06,768 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 99 transitions, 906 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states 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 17:46:06,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:46:06,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:46:06,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:46:07,048 INFO L124 PetriNetUnfolderBase]: 1197/2019 cut-off events. [2024-06-20 17:46:07,049 INFO L125 PetriNetUnfolderBase]: For 24237/24245 co-relation queries the response was YES. [2024-06-20 17:46:07,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9356 conditions, 2019 events. 1197/2019 cut-off events. For 24237/24245 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 11080 event pairs, 338 based on Foata normal form. 24/2042 useless extension candidates. Maximal degree in co-relation 9305. Up to 1680 conditions per place. [2024-06-20 17:46:07,064 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 109 selfloop transitions, 21 changer transitions 0/137 dead transitions. [2024-06-20 17:46:07,064 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 137 transitions, 1292 flow [2024-06-20 17:46:07,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:46:07,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:46:07,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-20 17:46:07,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.596875 [2024-06-20 17:46:07,066 INFO L175 Difference]: Start difference. First operand has 104 places, 99 transitions, 906 flow. Second operand 8 states and 191 transitions. [2024-06-20 17:46:07,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 137 transitions, 1292 flow [2024-06-20 17:46:07,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 137 transitions, 1204 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-20 17:46:07,090 INFO L231 Difference]: Finished difference. Result has 107 places, 100 transitions, 887 flow [2024-06-20 17:46:07,091 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=826, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=887, PETRI_PLACES=107, PETRI_TRANSITIONS=100} [2024-06-20 17:46:07,091 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 66 predicate places. [2024-06-20 17:46:07,091 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 100 transitions, 887 flow [2024-06-20 17:46:07,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states 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 17:46:07,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:46:07,091 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:46:07,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-20 17:46:07,092 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:46:07,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:46:07,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1072289659, now seen corresponding path program 1 times [2024-06-20 17:46:07,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:46:07,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921944182] [2024-06-20 17:46:07,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:46:07,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:46:07,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:46:07,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:46:07,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:46:07,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921944182] [2024-06-20 17:46:07,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921944182] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:46:07,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:46:07,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:46:07,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432675546] [2024-06-20 17:46:07,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:46:07,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:46:07,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:46:07,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:46:07,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:46:07,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:46:07,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 100 transitions, 887 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states 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 17:46:07,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:46:07,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:46:07,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:46:07,790 INFO L124 PetriNetUnfolderBase]: 1177/1987 cut-off events. [2024-06-20 17:46:07,791 INFO L125 PetriNetUnfolderBase]: For 22683/22691 co-relation queries the response was YES. [2024-06-20 17:46:07,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8887 conditions, 1987 events. 1177/1987 cut-off events. For 22683/22691 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 10866 event pairs, 285 based on Foata normal form. 20/2006 useless extension candidates. Maximal degree in co-relation 8836. Up to 1441 conditions per place. [2024-06-20 17:46:07,803 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 108 selfloop transitions, 25 changer transitions 0/140 dead transitions. [2024-06-20 17:46:07,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 140 transitions, 1237 flow [2024-06-20 17:46:07,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:46:07,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:46:07,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-20 17:46:07,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.603125 [2024-06-20 17:46:07,804 INFO L175 Difference]: Start difference. First operand has 107 places, 100 transitions, 887 flow. Second operand 8 states and 193 transitions. [2024-06-20 17:46:07,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 140 transitions, 1237 flow [2024-06-20 17:46:07,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 140 transitions, 1196 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-20 17:46:07,827 INFO L231 Difference]: Finished difference. Result has 108 places, 99 transitions, 860 flow [2024-06-20 17:46:07,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=806, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=860, PETRI_PLACES=108, PETRI_TRANSITIONS=99} [2024-06-20 17:46:07,827 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 67 predicate places. [2024-06-20 17:46:07,827 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 99 transitions, 860 flow [2024-06-20 17:46:07,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states 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 17:46:07,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:46:07,828 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:46:07,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-20 17:46:07,828 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:46:07,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:46:07,829 INFO L85 PathProgramCache]: Analyzing trace with hash 819392194, now seen corresponding path program 1 times [2024-06-20 17:46:07,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:46:07,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492892951] [2024-06-20 17:46:07,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:46:07,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:46:07,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:46:08,140 INFO 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 17:46:08,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:46:08,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492892951] [2024-06-20 17:46:08,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492892951] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:46:08,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:46:08,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 17:46:08,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88005682] [2024-06-20 17:46:08,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:46:08,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 17:46:08,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:46:08,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 17:46:08,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 17:46:08,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 17:46:08,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 99 transitions, 860 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states 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 17:46:08,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:46:08,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 17:46:08,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:46:08,387 INFO L124 PetriNetUnfolderBase]: 1127/1917 cut-off events. [2024-06-20 17:46:08,387 INFO L125 PetriNetUnfolderBase]: For 22664/22667 co-relation queries the response was YES. [2024-06-20 17:46:08,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8743 conditions, 1917 events. 1127/1917 cut-off events. For 22664/22667 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 10535 event pairs, 308 based on Foata normal form. 5/1906 useless extension candidates. Maximal degree in co-relation 8691. Up to 1703 conditions per place. [2024-06-20 17:46:08,398 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 78 selfloop transitions, 19 changer transitions 0/110 dead transitions. [2024-06-20 17:46:08,399 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 110 transitions, 1096 flow [2024-06-20 17:46:08,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 17:46:08,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 17:46:08,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 99 transitions. [2024-06-20 17:46:08,400 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.61875 [2024-06-20 17:46:08,400 INFO L175 Difference]: Start difference. First operand has 108 places, 99 transitions, 860 flow. Second operand 4 states and 99 transitions. [2024-06-20 17:46:08,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 110 transitions, 1096 flow [2024-06-20 17:46:08,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 110 transitions, 1026 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-20 17:46:08,425 INFO L231 Difference]: Finished difference. Result has 105 places, 102 transitions, 868 flow [2024-06-20 17:46:08,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=790, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=868, PETRI_PLACES=105, PETRI_TRANSITIONS=102} [2024-06-20 17:46:08,426 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 64 predicate places. [2024-06-20 17:46:08,426 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 102 transitions, 868 flow [2024-06-20 17:46:08,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states 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 17:46:08,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:46:08,426 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:46:08,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-20 17:46:08,427 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:46:08,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:46:08,427 INFO L85 PathProgramCache]: Analyzing trace with hash -807621564, now seen corresponding path program 2 times [2024-06-20 17:46:08,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:46:08,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935799843] [2024-06-20 17:46:08,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:46:08,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:46:08,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:46:08,765 INFO 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 17:46:08,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:46:08,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935799843] [2024-06-20 17:46:08,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935799843] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:46:08,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:46:08,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:46:08,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838612196] [2024-06-20 17:46:08,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:46:08,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:46:08,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:46:08,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:46:08,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:46:08,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 17:46:08,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 102 transitions, 868 flow. Second operand has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 7 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:08,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:46:08,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 17:46:08,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:46:09,049 INFO L124 PetriNetUnfolderBase]: 1121/1906 cut-off events. [2024-06-20 17:46:09,049 INFO L125 PetriNetUnfolderBase]: For 23425/23430 co-relation queries the response was YES. [2024-06-20 17:46:09,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8689 conditions, 1906 events. 1121/1906 cut-off events. For 23425/23430 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 10514 event pairs, 296 based on Foata normal form. 5/1897 useless extension candidates. Maximal degree in co-relation 8637. Up to 1690 conditions per place. [2024-06-20 17:46:09,060 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 87 selfloop transitions, 23 changer transitions 0/123 dead transitions. [2024-06-20 17:46:09,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 123 transitions, 1163 flow [2024-06-20 17:46:09,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:46:09,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:46:09,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-20 17:46:09,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-20 17:46:09,061 INFO L175 Difference]: Start difference. First operand has 105 places, 102 transitions, 868 flow. Second operand 7 states and 161 transitions. [2024-06-20 17:46:09,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 123 transitions, 1163 flow [2024-06-20 17:46:09,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 123 transitions, 1113 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-20 17:46:09,088 INFO L231 Difference]: Finished difference. Result has 110 places, 105 transitions, 904 flow [2024-06-20 17:46:09,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=822, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=904, PETRI_PLACES=110, PETRI_TRANSITIONS=105} [2024-06-20 17:46:09,089 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 69 predicate places. [2024-06-20 17:46:09,089 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 105 transitions, 904 flow [2024-06-20 17:46:09,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 7 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:09,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:46:09,089 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:46:09,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-20 17:46:09,090 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:46:09,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:46:09,093 INFO L85 PathProgramCache]: Analyzing trace with hash 1154175532, now seen corresponding path program 1 times [2024-06-20 17:46:09,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:46:09,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507168411] [2024-06-20 17:46:09,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:46:09,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:46:09,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:46:09,401 INFO 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 17:46:09,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:46:09,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507168411] [2024-06-20 17:46:09,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507168411] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:46:09,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:46:09,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 17:46:09,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934651834] [2024-06-20 17:46:09,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:46:09,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 17:46:09,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:46:09,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 17:46:09,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 17:46:09,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 17:46:09,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 105 transitions, 904 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states 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 17:46:09,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:46:09,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 17:46:09,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:46:09,625 INFO L124 PetriNetUnfolderBase]: 1109/1923 cut-off events. [2024-06-20 17:46:09,625 INFO L125 PetriNetUnfolderBase]: For 23969/23971 co-relation queries the response was YES. [2024-06-20 17:46:09,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8832 conditions, 1923 events. 1109/1923 cut-off events. For 23969/23971 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 10776 event pairs, 306 based on Foata normal form. 4/1925 useless extension candidates. Maximal degree in co-relation 8779. Up to 1700 conditions per place. [2024-06-20 17:46:09,658 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 92 selfloop transitions, 22 changer transitions 0/124 dead transitions. [2024-06-20 17:46:09,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 124 transitions, 1268 flow [2024-06-20 17:46:09,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 17:46:09,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 17:46:09,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 122 transitions. [2024-06-20 17:46:09,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.61 [2024-06-20 17:46:09,660 INFO L175 Difference]: Start difference. First operand has 110 places, 105 transitions, 904 flow. Second operand 5 states and 122 transitions. [2024-06-20 17:46:09,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 124 transitions, 1268 flow [2024-06-20 17:46:09,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 124 transitions, 1176 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-20 17:46:09,684 INFO L231 Difference]: Finished difference. Result has 108 places, 111 transitions, 928 flow [2024-06-20 17:46:09,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=812, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=928, PETRI_PLACES=108, PETRI_TRANSITIONS=111} [2024-06-20 17:46:09,685 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 67 predicate places. [2024-06-20 17:46:09,685 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 111 transitions, 928 flow [2024-06-20 17:46:09,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states 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 17:46:09,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:46:09,685 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:46:09,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-20 17:46:09,686 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:46:09,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:46:09,686 INFO L85 PathProgramCache]: Analyzing trace with hash 1025374060, now seen corresponding path program 2 times [2024-06-20 17:46:09,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:46:09,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381692604] [2024-06-20 17:46:09,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:46:09,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:46:09,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:46:10,038 INFO 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 17:46:10,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:46:10,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381692604] [2024-06-20 17:46:10,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381692604] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:46:10,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:46:10,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 17:46:10,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017703241] [2024-06-20 17:46:10,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:46:10,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 17:46:10,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:46:10,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 17:46:10,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-20 17:46:10,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 17:46:10,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 111 transitions, 928 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states 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 17:46:10,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:46:10,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 17:46:10,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:46:10,277 INFO L124 PetriNetUnfolderBase]: 1104/1916 cut-off events. [2024-06-20 17:46:10,277 INFO L125 PetriNetUnfolderBase]: For 25762/25764 co-relation queries the response was YES. [2024-06-20 17:46:10,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8987 conditions, 1916 events. 1104/1916 cut-off events. For 25762/25764 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 10726 event pairs, 306 based on Foata normal form. 4/1918 useless extension candidates. Maximal degree in co-relation 8936. Up to 1701 conditions per place. [2024-06-20 17:46:10,288 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 93 selfloop transitions, 19 changer transitions 0/122 dead transitions. [2024-06-20 17:46:10,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 122 transitions, 1180 flow [2024-06-20 17:46:10,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 17:46:10,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 17:46:10,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 102 transitions. [2024-06-20 17:46:10,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6375 [2024-06-20 17:46:10,289 INFO L175 Difference]: Start difference. First operand has 108 places, 111 transitions, 928 flow. Second operand 4 states and 102 transitions. [2024-06-20 17:46:10,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 122 transitions, 1180 flow [2024-06-20 17:46:10,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 122 transitions, 1125 flow, removed 21 selfloop flow, removed 1 redundant places. [2024-06-20 17:46:10,317 INFO L231 Difference]: Finished difference. Result has 111 places, 111 transitions, 923 flow [2024-06-20 17:46:10,317 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=873, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=923, PETRI_PLACES=111, PETRI_TRANSITIONS=111} [2024-06-20 17:46:10,318 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 70 predicate places. [2024-06-20 17:46:10,318 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 111 transitions, 923 flow [2024-06-20 17:46:10,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states 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 17:46:10,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:46:10,318 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:46:10,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-20 17:46:10,318 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:46:10,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:46:10,319 INFO L85 PathProgramCache]: Analyzing trace with hash -807606684, now seen corresponding path program 1 times [2024-06-20 17:46:10,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:46:10,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290367439] [2024-06-20 17:46:10,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:46:10,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:46:10,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:46:10,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:46:10,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:46:10,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290367439] [2024-06-20 17:46:10,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290367439] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:46:10,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:46:10,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 17:46:10,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146579926] [2024-06-20 17:46:10,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:46:10,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 17:46:10,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:46:10,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 17:46:10,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 17:46:10,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 17:46:10,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 111 transitions, 923 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states 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 17:46:10,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:46:10,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 17:46:10,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:46:10,897 INFO L124 PetriNetUnfolderBase]: 1111/1911 cut-off events. [2024-06-20 17:46:10,898 INFO L125 PetriNetUnfolderBase]: For 27231/27236 co-relation queries the response was YES. [2024-06-20 17:46:10,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8945 conditions, 1911 events. 1111/1911 cut-off events. For 27231/27236 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 10595 event pairs, 292 based on Foata normal form. 7/1904 useless extension candidates. Maximal degree in co-relation 8892. Up to 1704 conditions per place. [2024-06-20 17:46:10,921 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 100 selfloop transitions, 11 changer transitions 0/124 dead transitions. [2024-06-20 17:46:10,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 124 transitions, 1190 flow [2024-06-20 17:46:10,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 17:46:10,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 17:46:10,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 116 transitions. [2024-06-20 17:46:10,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.58 [2024-06-20 17:46:10,922 INFO L175 Difference]: Start difference. First operand has 111 places, 111 transitions, 923 flow. Second operand 5 states and 116 transitions. [2024-06-20 17:46:10,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 124 transitions, 1190 flow [2024-06-20 17:46:10,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 124 transitions, 1152 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-20 17:46:10,984 INFO L231 Difference]: Finished difference. Result has 113 places, 113 transitions, 932 flow [2024-06-20 17:46:10,984 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=885, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=932, PETRI_PLACES=113, PETRI_TRANSITIONS=113} [2024-06-20 17:46:10,984 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 72 predicate places. [2024-06-20 17:46:10,984 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 113 transitions, 932 flow [2024-06-20 17:46:10,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states 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 17:46:10,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:46:10,985 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 17:46:10,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-20 17:46:10,985 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:46:10,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:46:10,986 INFO L85 PathProgramCache]: Analyzing trace with hash 999572474, now seen corresponding path program 1 times [2024-06-20 17:46:10,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:46:10,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183377103] [2024-06-20 17:46:10,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:46:10,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:46:10,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:46:11,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:46:11,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:46:11,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183377103] [2024-06-20 17:46:11,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183377103] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:46:11,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:46:11,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:46:11,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091300669] [2024-06-20 17:46:11,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:46:11,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:46:11,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:46:11,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:46:11,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:46:11,383 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:46:11,383 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 113 transitions, 932 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:11,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:46:11,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:46:11,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:46:11,637 INFO L124 PetriNetUnfolderBase]: 1193/2031 cut-off events. [2024-06-20 17:46:11,637 INFO L125 PetriNetUnfolderBase]: For 28803/28809 co-relation queries the response was YES. [2024-06-20 17:46:11,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9600 conditions, 2031 events. 1193/2031 cut-off events. For 28803/28809 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 11251 event pairs, 308 based on Foata normal form. 7/2037 useless extension candidates. Maximal degree in co-relation 9546. Up to 1807 conditions per place. [2024-06-20 17:46:11,649 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 116 selfloop transitions, 26 changer transitions 0/149 dead transitions. [2024-06-20 17:46:11,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 149 transitions, 1435 flow [2024-06-20 17:46:11,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:46:11,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:46:11,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 176 transitions. [2024-06-20 17:46:11,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-06-20 17:46:11,651 INFO L175 Difference]: Start difference. First operand has 113 places, 113 transitions, 932 flow. Second operand 8 states and 176 transitions. [2024-06-20 17:46:11,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 149 transitions, 1435 flow [2024-06-20 17:46:11,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 149 transitions, 1399 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-20 17:46:11,675 INFO L231 Difference]: Finished difference. Result has 120 places, 128 transitions, 1098 flow [2024-06-20 17:46:11,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=901, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1098, PETRI_PLACES=120, PETRI_TRANSITIONS=128} [2024-06-20 17:46:11,675 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 79 predicate places. [2024-06-20 17:46:11,675 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 128 transitions, 1098 flow [2024-06-20 17:46:11,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:11,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:46:11,676 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 17:46:11,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-20 17:46:11,676 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:46:11,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:46:11,676 INFO L85 PathProgramCache]: Analyzing trace with hash -326639644, now seen corresponding path program 2 times [2024-06-20 17:46:11,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:46:11,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662139835] [2024-06-20 17:46:11,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:46:11,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:46:11,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:46:12,015 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 17:46:12,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:46:12,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662139835] [2024-06-20 17:46:12,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662139835] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:46:12,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:46:12,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:46:12,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471367859] [2024-06-20 17:46:12,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:46:12,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:46:12,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:46:12,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:46:12,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:46:12,059 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:46:12,059 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 128 transitions, 1098 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:12,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:46:12,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:46:12,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:46:12,270 INFO L124 PetriNetUnfolderBase]: 1198/2037 cut-off events. [2024-06-20 17:46:12,270 INFO L125 PetriNetUnfolderBase]: For 31630/31634 co-relation queries the response was YES. [2024-06-20 17:46:12,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9970 conditions, 2037 events. 1198/2037 cut-off events. For 31630/31634 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 11270 event pairs, 317 based on Foata normal form. 2/2037 useless extension candidates. Maximal degree in co-relation 9913. Up to 1813 conditions per place. [2024-06-20 17:46:12,284 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 110 selfloop transitions, 26 changer transitions 0/143 dead transitions. [2024-06-20 17:46:12,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 143 transitions, 1482 flow [2024-06-20 17:46:12,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 17:46:12,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 17:46:12,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 117 transitions. [2024-06-20 17:46:12,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.585 [2024-06-20 17:46:12,285 INFO L175 Difference]: Start difference. First operand has 120 places, 128 transitions, 1098 flow. Second operand 5 states and 117 transitions. [2024-06-20 17:46:12,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 143 transitions, 1482 flow [2024-06-20 17:46:12,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 143 transitions, 1418 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-20 17:46:12,322 INFO L231 Difference]: Finished difference. Result has 122 places, 131 transitions, 1118 flow [2024-06-20 17:46:12,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1040, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1118, PETRI_PLACES=122, PETRI_TRANSITIONS=131} [2024-06-20 17:46:12,322 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 81 predicate places. [2024-06-20 17:46:12,323 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 131 transitions, 1118 flow [2024-06-20 17:46:12,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:12,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:46:12,323 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 17:46:12,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-20 17:46:12,323 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:46:12,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:46:12,324 INFO L85 PathProgramCache]: Analyzing trace with hash -326650804, now seen corresponding path program 3 times [2024-06-20 17:46:12,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:46:12,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423678504] [2024-06-20 17:46:12,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:46:12,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:46:12,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:46:12,659 INFO 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 17:46:12,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:46:12,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423678504] [2024-06-20 17:46:12,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423678504] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:46:12,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:46:12,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:46:12,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697884386] [2024-06-20 17:46:12,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:46:12,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:46:12,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:46:12,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:46:12,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:46:12,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:46:12,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 131 transitions, 1118 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:12,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:46:12,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:46:12,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:46:12,955 INFO L124 PetriNetUnfolderBase]: 1195/2036 cut-off events. [2024-06-20 17:46:12,956 INFO L125 PetriNetUnfolderBase]: For 33169/33177 co-relation queries the response was YES. [2024-06-20 17:46:12,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9959 conditions, 2036 events. 1195/2036 cut-off events. For 33169/33177 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 11249 event pairs, 308 based on Foata normal form. 9/2044 useless extension candidates. Maximal degree in co-relation 9901. Up to 1810 conditions per place. [2024-06-20 17:46:12,970 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 115 selfloop transitions, 28 changer transitions 0/150 dead transitions. [2024-06-20 17:46:12,970 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 150 transitions, 1456 flow [2024-06-20 17:46:12,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:46:12,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:46:12,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 157 transitions. [2024-06-20 17:46:12,971 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5607142857142857 [2024-06-20 17:46:12,971 INFO L175 Difference]: Start difference. First operand has 122 places, 131 transitions, 1118 flow. Second operand 7 states and 157 transitions. [2024-06-20 17:46:12,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 150 transitions, 1456 flow [2024-06-20 17:46:13,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 150 transitions, 1407 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-06-20 17:46:13,003 INFO L231 Difference]: Finished difference. Result has 127 places, 131 transitions, 1135 flow [2024-06-20 17:46:13,003 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1069, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1135, PETRI_PLACES=127, PETRI_TRANSITIONS=131} [2024-06-20 17:46:13,004 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 86 predicate places. [2024-06-20 17:46:13,004 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 131 transitions, 1135 flow [2024-06-20 17:46:13,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:13,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:46:13,004 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 17:46:13,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-20 17:46:13,005 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:46:13,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:46:13,005 INFO L85 PathProgramCache]: Analyzing trace with hash 733536100, now seen corresponding path program 4 times [2024-06-20 17:46:13,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:46:13,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812833776] [2024-06-20 17:46:13,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:46:13,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:46:13,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:46:13,360 INFO 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 17:46:13,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:46:13,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812833776] [2024-06-20 17:46:13,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812833776] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:46:13,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:46:13,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:46:13,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227953112] [2024-06-20 17:46:13,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:46:13,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:46:13,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:46:13,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:46:13,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:46:13,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:46:13,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 131 transitions, 1135 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:13,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:46:13,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:46:13,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:46:13,629 INFO L124 PetriNetUnfolderBase]: 1192/2017 cut-off events. [2024-06-20 17:46:13,630 INFO L125 PetriNetUnfolderBase]: For 34682/34682 co-relation queries the response was YES. [2024-06-20 17:46:13,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9996 conditions, 2017 events. 1192/2017 cut-off events. For 34682/34682 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 11037 event pairs, 298 based on Foata normal form. 1/2017 useless extension candidates. Maximal degree in co-relation 9937. Up to 1800 conditions per place. [2024-06-20 17:46:13,643 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 119 selfloop transitions, 34 changer transitions 0/160 dead transitions. [2024-06-20 17:46:13,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 160 transitions, 1553 flow [2024-06-20 17:46:13,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:46:13,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:46:13,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 175 transitions. [2024-06-20 17:46:13,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.546875 [2024-06-20 17:46:13,646 INFO L175 Difference]: Start difference. First operand has 127 places, 131 transitions, 1135 flow. Second operand 8 states and 175 transitions. [2024-06-20 17:46:13,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 160 transitions, 1553 flow [2024-06-20 17:46:13,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 160 transitions, 1479 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-20 17:46:13,684 INFO L231 Difference]: Finished difference. Result has 130 places, 140 transitions, 1213 flow [2024-06-20 17:46:13,684 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1066, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1213, PETRI_PLACES=130, PETRI_TRANSITIONS=140} [2024-06-20 17:46:13,685 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 89 predicate places. [2024-06-20 17:46:13,685 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 140 transitions, 1213 flow [2024-06-20 17:46:13,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:13,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:46:13,686 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 17:46:13,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-20 17:46:13,686 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:46:13,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:46:13,686 INFO L85 PathProgramCache]: Analyzing trace with hash 114693072, now seen corresponding path program 1 times [2024-06-20 17:46:13,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:46:13,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530185418] [2024-06-20 17:46:13,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:46:13,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:46:13,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:46:14,056 INFO 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 17:46:14,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:46:14,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530185418] [2024-06-20 17:46:14,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530185418] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:46:14,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:46:14,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:46:14,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477422580] [2024-06-20 17:46:14,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:46:14,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:46:14,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:46:14,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:46:14,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:46:14,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:46:14,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 140 transitions, 1213 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:14,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:46:14,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:46:14,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:46:14,343 INFO L124 PetriNetUnfolderBase]: 1197/2027 cut-off events. [2024-06-20 17:46:14,344 INFO L125 PetriNetUnfolderBase]: For 34726/34728 co-relation queries the response was YES. [2024-06-20 17:46:14,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10260 conditions, 2027 events. 1197/2027 cut-off events. For 34726/34728 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 11114 event pairs, 306 based on Foata normal form. 3/2029 useless extension candidates. Maximal degree in co-relation 10199. Up to 1823 conditions per place. [2024-06-20 17:46:14,358 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 139 selfloop transitions, 22 changer transitions 0/168 dead transitions. [2024-06-20 17:46:14,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 168 transitions, 1727 flow [2024-06-20 17:46:14,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:46:14,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:46:14,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 138 transitions. [2024-06-20 17:46:14,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-20 17:46:14,360 INFO L175 Difference]: Start difference. First operand has 130 places, 140 transitions, 1213 flow. Second operand 6 states and 138 transitions. [2024-06-20 17:46:14,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 168 transitions, 1727 flow [2024-06-20 17:46:14,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 168 transitions, 1705 flow, removed 11 selfloop flow, removed 0 redundant places. [2024-06-20 17:46:14,405 INFO L231 Difference]: Finished difference. Result has 138 places, 152 transitions, 1362 flow [2024-06-20 17:46:14,405 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1191, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1362, PETRI_PLACES=138, PETRI_TRANSITIONS=152} [2024-06-20 17:46:14,406 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 97 predicate places. [2024-06-20 17:46:14,406 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 152 transitions, 1362 flow [2024-06-20 17:46:14,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:14,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:46:14,406 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 17:46:14,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-20 17:46:14,407 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:46:14,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:46:14,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1721831548, now seen corresponding path program 2 times [2024-06-20 17:46:14,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:46:14,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515905246] [2024-06-20 17:46:14,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:46:14,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:46:14,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:46:14,758 INFO 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 17:46:14,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:46:14,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515905246] [2024-06-20 17:46:14,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515905246] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:46:14,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:46:14,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:46:14,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614040818] [2024-06-20 17:46:14,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:46:14,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:46:14,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:46:14,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:46:14,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:46:14,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:46:14,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 152 transitions, 1362 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:14,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:46:14,824 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:46:14,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:46:15,087 INFO L124 PetriNetUnfolderBase]: 1202/2036 cut-off events. [2024-06-20 17:46:15,087 INFO L125 PetriNetUnfolderBase]: For 37824/37828 co-relation queries the response was YES. [2024-06-20 17:46:15,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10697 conditions, 2036 events. 1202/2036 cut-off events. For 37824/37828 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 11163 event pairs, 304 based on Foata normal form. 5/2040 useless extension candidates. Maximal degree in co-relation 10631. Up to 1835 conditions per place. [2024-06-20 17:46:15,101 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 143 selfloop transitions, 23 changer transitions 0/173 dead transitions. [2024-06-20 17:46:15,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 173 transitions, 1840 flow [2024-06-20 17:46:15,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:46:15,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:46:15,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 155 transitions. [2024-06-20 17:46:15,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5535714285714286 [2024-06-20 17:46:15,103 INFO L175 Difference]: Start difference. First operand has 138 places, 152 transitions, 1362 flow. Second operand 7 states and 155 transitions. [2024-06-20 17:46:15,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 173 transitions, 1840 flow [2024-06-20 17:46:15,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 173 transitions, 1786 flow, removed 17 selfloop flow, removed 2 redundant places. [2024-06-20 17:46:15,146 INFO L231 Difference]: Finished difference. Result has 144 places, 157 transitions, 1416 flow [2024-06-20 17:46:15,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1314, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1416, PETRI_PLACES=144, PETRI_TRANSITIONS=157} [2024-06-20 17:46:15,146 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 103 predicate places. [2024-06-20 17:46:15,147 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 157 transitions, 1416 flow [2024-06-20 17:46:15,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:15,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:46:15,147 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 17:46:15,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-20 17:46:15,147 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:46:15,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:46:15,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1721825968, now seen corresponding path program 3 times [2024-06-20 17:46:15,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:46:15,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932472431] [2024-06-20 17:46:15,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:46:15,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:46:15,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:46:15,497 INFO 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 17:46:15,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:46:15,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932472431] [2024-06-20 17:46:15,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932472431] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:46:15,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:46:15,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:46:15,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500642656] [2024-06-20 17:46:15,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:46:15,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:46:15,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:46:15,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:46:15,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:46:15,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:46:15,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 157 transitions, 1416 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:15,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:46:15,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:46:15,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:46:15,831 INFO L124 PetriNetUnfolderBase]: 1199/2032 cut-off events. [2024-06-20 17:46:15,832 INFO L125 PetriNetUnfolderBase]: For 39682/39686 co-relation queries the response was YES. [2024-06-20 17:46:15,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10708 conditions, 2032 events. 1199/2032 cut-off events. For 39682/39686 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 11171 event pairs, 306 based on Foata normal form. 5/2036 useless extension candidates. Maximal degree in co-relation 10640. Up to 1832 conditions per place. [2024-06-20 17:46:15,847 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 142 selfloop transitions, 21 changer transitions 0/170 dead transitions. [2024-06-20 17:46:15,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 170 transitions, 1777 flow [2024-06-20 17:46:15,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 17:46:15,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 17:46:15,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 119 transitions. [2024-06-20 17:46:15,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.595 [2024-06-20 17:46:15,848 INFO L175 Difference]: Start difference. First operand has 144 places, 157 transitions, 1416 flow. Second operand 5 states and 119 transitions. [2024-06-20 17:46:15,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 170 transitions, 1777 flow [2024-06-20 17:46:15,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 170 transitions, 1703 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-20 17:46:15,901 INFO L231 Difference]: Finished difference. Result has 145 places, 157 transitions, 1390 flow [2024-06-20 17:46:15,901 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1342, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1390, PETRI_PLACES=145, PETRI_TRANSITIONS=157} [2024-06-20 17:46:15,902 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 104 predicate places. [2024-06-20 17:46:15,902 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 157 transitions, 1390 flow [2024-06-20 17:46:15,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:15,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:46:15,902 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 17:46:15,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-20 17:46:15,903 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:46:15,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:46:15,903 INFO L85 PathProgramCache]: Analyzing trace with hash 865299045, now seen corresponding path program 1 times [2024-06-20 17:46:15,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:46:15,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282360738] [2024-06-20 17:46:15,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:46:15,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:46:15,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:46:16,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:46:16,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:46:16,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282360738] [2024-06-20 17:46:16,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282360738] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:46:16,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:46:16,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:46:16,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378996616] [2024-06-20 17:46:16,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:46:16,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:46:16,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:46:16,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:46:16,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:46:16,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 17:46:16,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 157 transitions, 1390 flow. Second operand has 8 states, 8 states have (on average 16.75) internal successors, (134), 8 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:16,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:46:16,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 17:46:16,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:46:16,628 INFO L124 PetriNetUnfolderBase]: 1186/2013 cut-off events. [2024-06-20 17:46:16,629 INFO L125 PetriNetUnfolderBase]: For 43843/43848 co-relation queries the response was YES. [2024-06-20 17:46:16,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10705 conditions, 2013 events. 1186/2013 cut-off events. For 43843/43848 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 11196 event pairs, 308 based on Foata normal form. 9/2005 useless extension candidates. Maximal degree in co-relation 10636. Up to 1725 conditions per place. [2024-06-20 17:46:16,644 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 120 selfloop transitions, 27 changer transitions 0/169 dead transitions. [2024-06-20 17:46:16,644 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 169 transitions, 1736 flow [2024-06-20 17:46:16,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 17:46:16,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 17:46:16,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 119 transitions. [2024-06-20 17:46:16,645 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.595 [2024-06-20 17:46:16,645 INFO L175 Difference]: Start difference. First operand has 145 places, 157 transitions, 1390 flow. Second operand 5 states and 119 transitions. [2024-06-20 17:46:16,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 169 transitions, 1736 flow [2024-06-20 17:46:16,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 169 transitions, 1694 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-20 17:46:16,696 INFO L231 Difference]: Finished difference. Result has 146 places, 159 transitions, 1444 flow [2024-06-20 17:46:16,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1348, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1444, PETRI_PLACES=146, PETRI_TRANSITIONS=159} [2024-06-20 17:46:16,697 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 105 predicate places. [2024-06-20 17:46:16,697 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 159 transitions, 1444 flow [2024-06-20 17:46:16,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.75) internal successors, (134), 8 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:16,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:46:16,697 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 17:46:16,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-20 17:46:16,698 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:46:16,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:46:16,698 INFO L85 PathProgramCache]: Analyzing trace with hash 1264796355, now seen corresponding path program 2 times [2024-06-20 17:46:16,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:46:16,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564735282] [2024-06-20 17:46:16,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:46:16,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:46:16,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:46:17,073 INFO 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 17:46:17,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:46:17,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564735282] [2024-06-20 17:46:17,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564735282] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:46:17,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:46:17,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:46:17,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728572581] [2024-06-20 17:46:17,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:46:17,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:46:17,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:46:17,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:46:17,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:46:17,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 17:46:17,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 159 transitions, 1444 flow. Second operand has 8 states, 8 states have (on average 16.75) internal successors, (134), 8 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:17,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:46:17,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 17:46:17,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:46:17,401 INFO L124 PetriNetUnfolderBase]: 1184/2016 cut-off events. [2024-06-20 17:46:17,401 INFO L125 PetriNetUnfolderBase]: For 46545/46545 co-relation queries the response was YES. [2024-06-20 17:46:17,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10924 conditions, 2016 events. 1184/2016 cut-off events. For 46545/46545 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 11199 event pairs, 296 based on Foata normal form. 4/2005 useless extension candidates. Maximal degree in co-relation 10854. Up to 1739 conditions per place. [2024-06-20 17:46:17,417 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 127 selfloop transitions, 32 changer transitions 0/181 dead transitions. [2024-06-20 17:46:17,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 181 transitions, 1845 flow [2024-06-20 17:46:17,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:46:17,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:46:17,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-20 17:46:17,418 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-06-20 17:46:17,418 INFO L175 Difference]: Start difference. First operand has 146 places, 159 transitions, 1444 flow. Second operand 8 states and 180 transitions. [2024-06-20 17:46:17,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 181 transitions, 1845 flow [2024-06-20 17:46:17,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 181 transitions, 1777 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-20 17:46:17,465 INFO L231 Difference]: Finished difference. Result has 151 places, 161 transitions, 1482 flow [2024-06-20 17:46:17,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1376, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1482, PETRI_PLACES=151, PETRI_TRANSITIONS=161} [2024-06-20 17:46:17,465 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 110 predicate places. [2024-06-20 17:46:17,465 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 161 transitions, 1482 flow [2024-06-20 17:46:17,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.75) internal successors, (134), 8 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:17,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:46:17,466 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 17:46:17,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-20 17:46:17,466 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:46:17,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:46:17,466 INFO L85 PathProgramCache]: Analyzing trace with hash 1279081155, now seen corresponding path program 3 times [2024-06-20 17:46:17,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:46:17,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123019297] [2024-06-20 17:46:17,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:46:17,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:46:17,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:46:17,837 INFO 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 17:46:17,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:46:17,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123019297] [2024-06-20 17:46:17,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123019297] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:46:17,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:46:17,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:46:17,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426238213] [2024-06-20 17:46:17,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:46:17,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:46:17,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:46:17,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:46:17,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:46:17,898 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 17:46:17,898 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 161 transitions, 1482 flow. Second operand has 8 states, 8 states have (on average 16.75) internal successors, (134), 8 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:17,898 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:46:17,898 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 17:46:17,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:46:18,185 INFO L124 PetriNetUnfolderBase]: 1174/2002 cut-off events. [2024-06-20 17:46:18,185 INFO L125 PetriNetUnfolderBase]: For 47059/47059 co-relation queries the response was YES. [2024-06-20 17:46:18,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10836 conditions, 2002 events. 1174/2002 cut-off events. For 47059/47059 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 11128 event pairs, 290 based on Foata normal form. 4/1991 useless extension candidates. Maximal degree in co-relation 10765. Up to 1687 conditions per place. [2024-06-20 17:46:18,203 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 124 selfloop transitions, 38 changer transitions 0/184 dead transitions. [2024-06-20 17:46:18,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 184 transitions, 1895 flow [2024-06-20 17:46:18,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:46:18,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:46:18,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 181 transitions. [2024-06-20 17:46:18,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.565625 [2024-06-20 17:46:18,204 INFO L175 Difference]: Start difference. First operand has 151 places, 161 transitions, 1482 flow. Second operand 8 states and 181 transitions. [2024-06-20 17:46:18,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 184 transitions, 1895 flow [2024-06-20 17:46:18,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 184 transitions, 1807 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-20 17:46:18,252 INFO L231 Difference]: Finished difference. Result has 153 places, 163 transitions, 1515 flow [2024-06-20 17:46:18,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1394, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1515, PETRI_PLACES=153, PETRI_TRANSITIONS=163} [2024-06-20 17:46:18,253 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 112 predicate places. [2024-06-20 17:46:18,253 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 163 transitions, 1515 flow [2024-06-20 17:46:18,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.75) internal successors, (134), 8 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:18,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:46:18,254 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 17:46:18,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-20 17:46:18,254 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:46:18,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:46:18,254 INFO L85 PathProgramCache]: Analyzing trace with hash 1058299755, now seen corresponding path program 1 times [2024-06-20 17:46:18,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:46:18,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462444312] [2024-06-20 17:46:18,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:46:18,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:46:18,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:46:18,592 INFO 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 17:46:18,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:46:18,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462444312] [2024-06-20 17:46:18,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462444312] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:46:18,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:46:18,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:46:18,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588359981] [2024-06-20 17:46:18,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:46:18,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:46:18,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:46:18,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:46:18,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:46:18,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 17:46:18,641 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 163 transitions, 1515 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states 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 17:46:18,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:46:18,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 17:46:18,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:46:18,887 INFO L124 PetriNetUnfolderBase]: 1186/2027 cut-off events. [2024-06-20 17:46:18,887 INFO L125 PetriNetUnfolderBase]: For 50346/50350 co-relation queries the response was YES. [2024-06-20 17:46:18,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11067 conditions, 2027 events. 1186/2027 cut-off events. For 50346/50350 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 11358 event pairs, 268 based on Foata normal form. 8/2027 useless extension candidates. Maximal degree in co-relation 10995. Up to 1686 conditions per place. [2024-06-20 17:46:18,903 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 136 selfloop transitions, 32 changer transitions 0/186 dead transitions. [2024-06-20 17:46:18,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 186 transitions, 2033 flow [2024-06-20 17:46:18,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:46:18,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:46:18,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-20 17:46:18,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6041666666666666 [2024-06-20 17:46:18,904 INFO L175 Difference]: Start difference. First operand has 153 places, 163 transitions, 1515 flow. Second operand 6 states and 145 transitions. [2024-06-20 17:46:18,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 186 transitions, 2033 flow [2024-06-20 17:46:18,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 186 transitions, 1928 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-20 17:46:18,971 INFO L231 Difference]: Finished difference. Result has 153 places, 167 transitions, 1551 flow [2024-06-20 17:46:18,971 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1410, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1551, PETRI_PLACES=153, PETRI_TRANSITIONS=167} [2024-06-20 17:46:18,971 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 112 predicate places. [2024-06-20 17:46:18,972 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 167 transitions, 1551 flow [2024-06-20 17:46:18,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states 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 17:46:18,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:46:18,972 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 17:46:18,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-20 17:46:18,972 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:46:18,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:46:18,973 INFO L85 PathProgramCache]: Analyzing trace with hash 530360447, now seen corresponding path program 2 times [2024-06-20 17:46:18,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:46:18,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102118823] [2024-06-20 17:46:18,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:46:18,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:46:18,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:46:19,355 INFO 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 17:46:19,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:46:19,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102118823] [2024-06-20 17:46:19,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102118823] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:46:19,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:46:19,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:46:19,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053665225] [2024-06-20 17:46:19,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:46:19,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:46:19,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:46:19,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:46:19,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:46:19,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 17:46:19,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 167 transitions, 1551 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states 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 17:46:19,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:46:19,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 17:46:19,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:46:19,705 INFO L124 PetriNetUnfolderBase]: 1200/2049 cut-off events. [2024-06-20 17:46:19,705 INFO L125 PetriNetUnfolderBase]: For 53244/53248 co-relation queries the response was YES. [2024-06-20 17:46:19,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11265 conditions, 2049 events. 1200/2049 cut-off events. For 53244/53248 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 11459 event pairs, 305 based on Foata normal form. 8/2049 useless extension candidates. Maximal degree in co-relation 11192. Up to 1768 conditions per place. [2024-06-20 17:46:19,720 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 135 selfloop transitions, 30 changer transitions 0/183 dead transitions. [2024-06-20 17:46:19,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 183 transitions, 1953 flow [2024-06-20 17:46:19,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:46:19,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:46:19,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 140 transitions. [2024-06-20 17:46:19,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-20 17:46:19,722 INFO L175 Difference]: Start difference. First operand has 153 places, 167 transitions, 1551 flow. Second operand 6 states and 140 transitions. [2024-06-20 17:46:19,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 183 transitions, 1953 flow [2024-06-20 17:46:19,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 183 transitions, 1877 flow, removed 23 selfloop flow, removed 2 redundant places. [2024-06-20 17:46:19,790 INFO L231 Difference]: Finished difference. Result has 157 places, 169 transitions, 1583 flow [2024-06-20 17:46:19,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1483, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1583, PETRI_PLACES=157, PETRI_TRANSITIONS=169} [2024-06-20 17:46:19,791 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 116 predicate places. [2024-06-20 17:46:19,791 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 169 transitions, 1583 flow [2024-06-20 17:46:19,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states 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 17:46:19,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:46:19,791 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 17:46:19,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-20 17:46:19,792 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:46:19,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:46:19,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1836993707, now seen corresponding path program 3 times [2024-06-20 17:46:19,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:46:19,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86826829] [2024-06-20 17:46:19,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:46:19,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:46:19,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:46:20,198 INFO 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 17:46:20,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:46:20,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86826829] [2024-06-20 17:46:20,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86826829] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:46:20,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:46:20,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 17:46:20,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093681788] [2024-06-20 17:46:20,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:46:20,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 17:46:20,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:46:20,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 17:46:20,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-20 17:46:20,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-20 17:46:20,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 169 transitions, 1583 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states 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 17:46:20,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:46:20,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-20 17:46:20,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:46:20,576 INFO L124 PetriNetUnfolderBase]: 1190/2035 cut-off events. [2024-06-20 17:46:20,576 INFO L125 PetriNetUnfolderBase]: For 53355/53359 co-relation queries the response was YES. [2024-06-20 17:46:20,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11079 conditions, 2035 events. 1190/2035 cut-off events. For 53355/53359 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 11420 event pairs, 266 based on Foata normal form. 8/2035 useless extension candidates. Maximal degree in co-relation 11004. Up to 1726 conditions per place. [2024-06-20 17:46:20,589 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 140 selfloop transitions, 27 changer transitions 0/185 dead transitions. [2024-06-20 17:46:20,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 185 transitions, 1957 flow [2024-06-20 17:46:20,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 17:46:20,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 17:46:20,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 125 transitions. [2024-06-20 17:46:20,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-20 17:46:20,590 INFO L175 Difference]: Start difference. First operand has 157 places, 169 transitions, 1583 flow. Second operand 5 states and 125 transitions. [2024-06-20 17:46:20,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 185 transitions, 1957 flow [2024-06-20 17:46:20,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 185 transitions, 1859 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-20 17:46:20,658 INFO L231 Difference]: Finished difference. Result has 158 places, 169 transitions, 1549 flow [2024-06-20 17:46:20,659 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1485, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1549, PETRI_PLACES=158, PETRI_TRANSITIONS=169} [2024-06-20 17:46:20,660 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 117 predicate places. [2024-06-20 17:46:20,660 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 169 transitions, 1549 flow [2024-06-20 17:46:20,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states 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 17:46:20,660 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:46:20,660 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 17:46:20,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-20 17:46:20,661 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:46:20,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:46:20,661 INFO L85 PathProgramCache]: Analyzing trace with hash 1033327985, now seen corresponding path program 1 times [2024-06-20 17:46:20,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:46:20,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091847579] [2024-06-20 17:46:20,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:46:20,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:46:20,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:46:20,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:46:20,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:46:20,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091847579] [2024-06-20 17:46:20,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091847579] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:46:20,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:46:20,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:46:20,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020209691] [2024-06-20 17:46:20,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:46:20,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:46:20,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:46:20,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:46:20,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:46:21,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:46:21,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 169 transitions, 1549 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:21,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:46:21,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:46:21,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:46:21,294 INFO L124 PetriNetUnfolderBase]: 1256/2130 cut-off events. [2024-06-20 17:46:21,294 INFO L125 PetriNetUnfolderBase]: For 54788/54796 co-relation queries the response was YES. [2024-06-20 17:46:21,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11560 conditions, 2130 events. 1256/2130 cut-off events. For 54788/54796 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 11850 event pairs, 328 based on Foata normal form. 9/2137 useless extension candidates. Maximal degree in co-relation 11484. Up to 1767 conditions per place. [2024-06-20 17:46:21,311 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 142 selfloop transitions, 54 changer transitions 0/203 dead transitions. [2024-06-20 17:46:21,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 203 transitions, 2265 flow [2024-06-20 17:46:21,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:46:21,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:46:21,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-20 17:46:21,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-06-20 17:46:21,312 INFO L175 Difference]: Start difference. First operand has 158 places, 169 transitions, 1549 flow. Second operand 7 states and 170 transitions. [2024-06-20 17:46:21,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 203 transitions, 2265 flow [2024-06-20 17:46:21,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 203 transitions, 2203 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-20 17:46:21,376 INFO L231 Difference]: Finished difference. Result has 161 places, 178 transitions, 1721 flow [2024-06-20 17:46:21,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1487, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1721, PETRI_PLACES=161, PETRI_TRANSITIONS=178} [2024-06-20 17:46:21,377 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 120 predicate places. [2024-06-20 17:46:21,377 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 178 transitions, 1721 flow [2024-06-20 17:46:21,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:21,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:46:21,377 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 17:46:21,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-20 17:46:21,377 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:46:21,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:46:21,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1033448141, now seen corresponding path program 1 times [2024-06-20 17:46:21,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:46:21,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063781625] [2024-06-20 17:46:21,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:46:21,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:46:21,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:46:21,746 INFO 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 17:46:21,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:46:21,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063781625] [2024-06-20 17:46:21,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063781625] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:46:21,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:46:21,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:46:21,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708402623] [2024-06-20 17:46:21,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:46:21,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:46:21,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:46:21,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:46:21,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:46:21,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:46:21,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 178 transitions, 1721 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:21,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:46:21,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:46:21,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:46:22,126 INFO L124 PetriNetUnfolderBase]: 1282/2173 cut-off events. [2024-06-20 17:46:22,127 INFO L125 PetriNetUnfolderBase]: For 60179/60191 co-relation queries the response was YES. [2024-06-20 17:46:22,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12253 conditions, 2173 events. 1282/2173 cut-off events. For 60179/60191 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 12167 event pairs, 315 based on Foata normal form. 13/2185 useless extension candidates. Maximal degree in co-relation 12176. Up to 1843 conditions per place. [2024-06-20 17:46:22,151 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 145 selfloop transitions, 63 changer transitions 0/215 dead transitions. [2024-06-20 17:46:22,151 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 215 transitions, 2516 flow [2024-06-20 17:46:22,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:46:22,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:46:22,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 221 transitions. [2024-06-20 17:46:22,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5525 [2024-06-20 17:46:22,153 INFO L175 Difference]: Start difference. First operand has 161 places, 178 transitions, 1721 flow. Second operand 10 states and 221 transitions. [2024-06-20 17:46:22,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 215 transitions, 2516 flow [2024-06-20 17:46:22,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 215 transitions, 2427 flow, removed 28 selfloop flow, removed 2 redundant places. [2024-06-20 17:46:22,248 INFO L231 Difference]: Finished difference. Result has 169 places, 190 transitions, 1937 flow [2024-06-20 17:46:22,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1635, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1937, PETRI_PLACES=169, PETRI_TRANSITIONS=190} [2024-06-20 17:46:22,249 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 128 predicate places. [2024-06-20 17:46:22,249 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 190 transitions, 1937 flow [2024-06-20 17:46:22,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:22,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:46:22,249 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 17:46:22,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-20 17:46:22,250 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:46:22,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:46:22,250 INFO L85 PathProgramCache]: Analyzing trace with hash 1033447955, now seen corresponding path program 2 times [2024-06-20 17:46:22,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:46:22,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427318011] [2024-06-20 17:46:22,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:46:22,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:46:22,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:46:22,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:46:22,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:46:22,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427318011] [2024-06-20 17:46:22,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427318011] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:46:22,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:46:22,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:46:22,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635234017] [2024-06-20 17:46:22,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:46:22,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:46:22,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:46:22,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:46:22,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:46:22,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:46:22,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 190 transitions, 1937 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:22,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:46:22,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:46:22,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:46:23,010 INFO L124 PetriNetUnfolderBase]: 1287/2182 cut-off events. [2024-06-20 17:46:23,010 INFO L125 PetriNetUnfolderBase]: For 64048/64060 co-relation queries the response was YES. [2024-06-20 17:46:23,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12633 conditions, 2182 events. 1287/2182 cut-off events. For 64048/64060 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 12220 event pairs, 315 based on Foata normal form. 13/2194 useless extension candidates. Maximal degree in co-relation 12554. Up to 1891 conditions per place. [2024-06-20 17:46:23,027 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 168 selfloop transitions, 38 changer transitions 0/213 dead transitions. [2024-06-20 17:46:23,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 213 transitions, 2427 flow [2024-06-20 17:46:23,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:46:23,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:46:23,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 162 transitions. [2024-06-20 17:46:23,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5785714285714286 [2024-06-20 17:46:23,029 INFO L175 Difference]: Start difference. First operand has 169 places, 190 transitions, 1937 flow. Second operand 7 states and 162 transitions. [2024-06-20 17:46:23,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 213 transitions, 2427 flow [2024-06-20 17:46:23,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 213 transitions, 2300 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-20 17:46:23,106 INFO L231 Difference]: Finished difference. Result has 172 places, 193 transitions, 1926 flow [2024-06-20 17:46:23,107 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1810, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1926, PETRI_PLACES=172, PETRI_TRANSITIONS=193} [2024-06-20 17:46:23,107 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 131 predicate places. [2024-06-20 17:46:23,108 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 193 transitions, 1926 flow [2024-06-20 17:46:23,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:23,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:46:23,112 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 17:46:23,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-20 17:46:23,113 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:46:23,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:46:23,114 INFO L85 PathProgramCache]: Analyzing trace with hash 1210579661, now seen corresponding path program 2 times [2024-06-20 17:46:23,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:46:23,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326164089] [2024-06-20 17:46:23,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:46:23,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:46:23,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:46:23,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:46:23,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:46:23,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326164089] [2024-06-20 17:46:23,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326164089] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:46:23,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:46:23,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:46:23,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211434707] [2024-06-20 17:46:23,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:46:23,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:46:23,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:46:23,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:46:23,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:46:23,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:46:23,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 193 transitions, 1926 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:23,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:46:23,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:46:23,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:46:23,852 INFO L124 PetriNetUnfolderBase]: 1318/2229 cut-off events. [2024-06-20 17:46:23,852 INFO L125 PetriNetUnfolderBase]: For 68634/68646 co-relation queries the response was YES. [2024-06-20 17:46:23,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13091 conditions, 2229 events. 1318/2229 cut-off events. For 68634/68646 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 12516 event pairs, 315 based on Foata normal form. 13/2241 useless extension candidates. Maximal degree in co-relation 13010. Up to 1882 conditions per place. [2024-06-20 17:46:23,871 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 149 selfloop transitions, 76 changer transitions 0/232 dead transitions. [2024-06-20 17:46:23,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 232 transitions, 2859 flow [2024-06-20 17:46:23,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 17:46:23,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 17:46:23,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 238 transitions. [2024-06-20 17:46:23,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5409090909090909 [2024-06-20 17:46:23,873 INFO L175 Difference]: Start difference. First operand has 172 places, 193 transitions, 1926 flow. Second operand 11 states and 238 transitions. [2024-06-20 17:46:23,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 232 transitions, 2859 flow [2024-06-20 17:46:23,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 232 transitions, 2759 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-20 17:46:23,965 INFO L231 Difference]: Finished difference. Result has 178 places, 208 transitions, 2171 flow [2024-06-20 17:46:23,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1838, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2171, PETRI_PLACES=178, PETRI_TRANSITIONS=208} [2024-06-20 17:46:23,965 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 137 predicate places. [2024-06-20 17:46:23,965 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 208 transitions, 2171 flow [2024-06-20 17:46:23,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:23,966 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:46:23,966 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 17:46:23,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-20 17:46:23,966 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:46:23,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:46:23,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1210579475, now seen corresponding path program 3 times [2024-06-20 17:46:23,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:46:23,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730899103] [2024-06-20 17:46:23,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:46:23,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:46:23,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:46:24,301 INFO 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 17:46:24,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:46:24,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730899103] [2024-06-20 17:46:24,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730899103] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:46:24,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:46:24,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:46:24,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890450734] [2024-06-20 17:46:24,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:46:24,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:46:24,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:46:24,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:46:24,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:46:24,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:46:24,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 208 transitions, 2171 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:24,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:46:24,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:46:24,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:46:24,680 INFO L124 PetriNetUnfolderBase]: 1331/2251 cut-off events. [2024-06-20 17:46:24,681 INFO L125 PetriNetUnfolderBase]: For 72710/72722 co-relation queries the response was YES. [2024-06-20 17:46:24,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13386 conditions, 2251 events. 1331/2251 cut-off events. For 72710/72722 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 12696 event pairs, 315 based on Foata normal form. 13/2263 useless extension candidates. Maximal degree in co-relation 13304. Up to 1943 conditions per place. [2024-06-20 17:46:24,698 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 176 selfloop transitions, 50 changer transitions 0/233 dead transitions. [2024-06-20 17:46:24,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 233 transitions, 2821 flow [2024-06-20 17:46:24,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:46:24,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:46:24,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 178 transitions. [2024-06-20 17:46:24,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55625 [2024-06-20 17:46:24,699 INFO L175 Difference]: Start difference. First operand has 178 places, 208 transitions, 2171 flow. Second operand 8 states and 178 transitions. [2024-06-20 17:46:24,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 233 transitions, 2821 flow [2024-06-20 17:46:24,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 233 transitions, 2708 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-20 17:46:24,808 INFO L231 Difference]: Finished difference. Result has 184 places, 214 transitions, 2254 flow [2024-06-20 17:46:24,808 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2058, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2254, PETRI_PLACES=184, PETRI_TRANSITIONS=214} [2024-06-20 17:46:24,808 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 143 predicate places. [2024-06-20 17:46:24,808 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 214 transitions, 2254 flow [2024-06-20 17:46:24,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:24,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:46:24,809 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 17:46:24,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-20 17:46:24,810 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:46:24,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:46:24,810 INFO L85 PathProgramCache]: Analyzing trace with hash 1210816811, now seen corresponding path program 3 times [2024-06-20 17:46:24,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:46:24,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819608240] [2024-06-20 17:46:24,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:46:24,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:46:24,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:46:25,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:46:25,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:46:25,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819608240] [2024-06-20 17:46:25,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819608240] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:46:25,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:46:25,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:46:25,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277878370] [2024-06-20 17:46:25,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:46:25,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:46:25,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:46:25,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:46:25,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:46:25,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:46:25,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 214 transitions, 2254 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:25,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:46:25,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:46:25,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:46:25,556 INFO L124 PetriNetUnfolderBase]: 1328/2247 cut-off events. [2024-06-20 17:46:25,557 INFO L125 PetriNetUnfolderBase]: For 75172/75184 co-relation queries the response was YES. [2024-06-20 17:46:25,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13390 conditions, 2247 events. 1328/2247 cut-off events. For 75172/75184 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 12683 event pairs, 315 based on Foata normal form. 13/2259 useless extension candidates. Maximal degree in co-relation 13306. Up to 1897 conditions per place. [2024-06-20 17:46:25,574 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 153 selfloop transitions, 75 changer transitions 0/235 dead transitions. [2024-06-20 17:46:25,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 235 transitions, 2928 flow [2024-06-20 17:46:25,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:46:25,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:46:25,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 201 transitions. [2024-06-20 17:46:25,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5583333333333333 [2024-06-20 17:46:25,585 INFO L175 Difference]: Start difference. First operand has 184 places, 214 transitions, 2254 flow. Second operand 9 states and 201 transitions. [2024-06-20 17:46:25,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 235 transitions, 2928 flow [2024-06-20 17:46:25,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 235 transitions, 2782 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-20 17:46:25,695 INFO L231 Difference]: Finished difference. Result has 188 places, 214 transitions, 2264 flow [2024-06-20 17:46:25,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2108, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2264, PETRI_PLACES=188, PETRI_TRANSITIONS=214} [2024-06-20 17:46:25,696 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 147 predicate places. [2024-06-20 17:46:25,696 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 214 transitions, 2264 flow [2024-06-20 17:46:25,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:25,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:46:25,696 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 17:46:25,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-20 17:46:25,697 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:46:25,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:46:25,697 INFO L85 PathProgramCache]: Analyzing trace with hash 944790125, now seen corresponding path program 1 times [2024-06-20 17:46:25,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:46:25,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85489691] [2024-06-20 17:46:25,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:46:25,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:46:25,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:46:26,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:46:26,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:46:26,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85489691] [2024-06-20 17:46:26,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85489691] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:46:26,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:46:26,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:46:26,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58891255] [2024-06-20 17:46:26,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:46:26,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:46:26,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:46:26,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:46:26,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:46:26,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:46:26,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 214 transitions, 2264 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:26,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:46:26,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:46:26,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:46:26,576 INFO L124 PetriNetUnfolderBase]: 1402/2363 cut-off events. [2024-06-20 17:46:26,577 INFO L125 PetriNetUnfolderBase]: For 90445/90453 co-relation queries the response was YES. [2024-06-20 17:46:26,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14282 conditions, 2363 events. 1402/2363 cut-off events. For 90445/90453 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 13377 event pairs, 244 based on Foata normal form. 14/2376 useless extension candidates. Maximal degree in co-relation 14197. Up to 1984 conditions per place. [2024-06-20 17:46:26,597 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 207 selfloop transitions, 37 changer transitions 0/251 dead transitions. [2024-06-20 17:46:26,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 251 transitions, 2997 flow [2024-06-20 17:46:26,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:46:26,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:46:26,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 202 transitions. [2024-06-20 17:46:26,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5611111111111111 [2024-06-20 17:46:26,612 INFO L175 Difference]: Start difference. First operand has 188 places, 214 transitions, 2264 flow. Second operand 9 states and 202 transitions. [2024-06-20 17:46:26,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 251 transitions, 2997 flow [2024-06-20 17:46:26,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 251 transitions, 2847 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-20 17:46:26,745 INFO L231 Difference]: Finished difference. Result has 191 places, 219 transitions, 2258 flow [2024-06-20 17:46:26,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2114, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2258, PETRI_PLACES=191, PETRI_TRANSITIONS=219} [2024-06-20 17:46:26,745 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 150 predicate places. [2024-06-20 17:46:26,745 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 219 transitions, 2258 flow [2024-06-20 17:46:26,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:26,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:46:26,746 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:46:26,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-20 17:46:26,746 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:46:26,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:46:26,746 INFO L85 PathProgramCache]: Analyzing trace with hash 1210813835, now seen corresponding path program 2 times [2024-06-20 17:46:26,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:46:26,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734590078] [2024-06-20 17:46:26,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:46:26,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:46:26,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:46:27,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:46:27,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:46:27,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734590078] [2024-06-20 17:46:27,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734590078] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:46:27,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:46:27,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:46:27,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720642103] [2024-06-20 17:46:27,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:46:27,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:46:27,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:46:27,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:46:27,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:46:27,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:46:27,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 219 transitions, 2258 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:27,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:46:27,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:46:27,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:46:27,516 INFO L124 PetriNetUnfolderBase]: 1430/2411 cut-off events. [2024-06-20 17:46:27,517 INFO L125 PetriNetUnfolderBase]: For 96670/96678 co-relation queries the response was YES. [2024-06-20 17:46:27,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14657 conditions, 2411 events. 1430/2411 cut-off events. For 96670/96678 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 13752 event pairs, 325 based on Foata normal form. 16/2426 useless extension candidates. Maximal degree in co-relation 14569. Up to 2128 conditions per place. [2024-06-20 17:46:27,537 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 205 selfloop transitions, 32 changer transitions 0/244 dead transitions. [2024-06-20 17:46:27,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 244 transitions, 2828 flow [2024-06-20 17:46:27,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:46:27,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:46:27,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 195 transitions. [2024-06-20 17:46:27,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-06-20 17:46:27,538 INFO L175 Difference]: Start difference. First operand has 191 places, 219 transitions, 2258 flow. Second operand 9 states and 195 transitions. [2024-06-20 17:46:27,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 244 transitions, 2828 flow [2024-06-20 17:46:27,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 244 transitions, 2781 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-20 17:46:27,668 INFO L231 Difference]: Finished difference. Result has 196 places, 220 transitions, 2293 flow [2024-06-20 17:46:27,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2213, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2293, PETRI_PLACES=196, PETRI_TRANSITIONS=220} [2024-06-20 17:46:27,669 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 155 predicate places. [2024-06-20 17:46:27,669 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 220 transitions, 2293 flow [2024-06-20 17:46:27,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:27,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:46:27,670 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:46:27,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-20 17:46:27,670 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:46:27,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:46:27,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1210487405, now seen corresponding path program 3 times [2024-06-20 17:46:27,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:46:27,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179873093] [2024-06-20 17:46:27,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:46:27,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:46:27,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:46:28,010 INFO 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 17:46:28,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:46:28,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179873093] [2024-06-20 17:46:28,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179873093] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:46:28,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:46:28,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:46:28,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999825391] [2024-06-20 17:46:28,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:46:28,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:46:28,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:46:28,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:46:28,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:46:28,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:46:28,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 220 transitions, 2293 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:28,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:46:28,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:46:28,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:46:28,513 INFO L124 PetriNetUnfolderBase]: 1458/2457 cut-off events. [2024-06-20 17:46:28,513 INFO L125 PetriNetUnfolderBase]: For 98920/98928 co-relation queries the response was YES. [2024-06-20 17:46:28,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15009 conditions, 2457 events. 1458/2457 cut-off events. For 98920/98928 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 14079 event pairs, 323 based on Foata normal form. 14/2470 useless extension candidates. Maximal degree in co-relation 14919. Up to 2142 conditions per place. [2024-06-20 17:46:28,532 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 209 selfloop transitions, 35 changer transitions 0/251 dead transitions. [2024-06-20 17:46:28,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 251 transitions, 2919 flow [2024-06-20 17:46:28,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:46:28,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:46:28,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 215 transitions. [2024-06-20 17:46:28,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5375 [2024-06-20 17:46:28,534 INFO L175 Difference]: Start difference. First operand has 196 places, 220 transitions, 2293 flow. Second operand 10 states and 215 transitions. [2024-06-20 17:46:28,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 251 transitions, 2919 flow [2024-06-20 17:46:28,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 251 transitions, 2856 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-20 17:46:28,675 INFO L231 Difference]: Finished difference. Result has 200 places, 223 transitions, 2349 flow [2024-06-20 17:46:28,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2230, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2349, PETRI_PLACES=200, PETRI_TRANSITIONS=223} [2024-06-20 17:46:28,676 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 159 predicate places. [2024-06-20 17:46:28,676 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 223 transitions, 2349 flow [2024-06-20 17:46:28,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:28,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:46:28,677 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 17:46:28,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-20 17:46:28,677 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:46:28,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:46:28,677 INFO L85 PathProgramCache]: Analyzing trace with hash 2007821013, now seen corresponding path program 4 times [2024-06-20 17:46:28,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:46:28,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726578713] [2024-06-20 17:46:28,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:46:28,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:46:28,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:46:29,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:46:29,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:46:29,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726578713] [2024-06-20 17:46:29,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726578713] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:46:29,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:46:29,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:46:29,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703458549] [2024-06-20 17:46:29,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:46:29,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:46:29,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:46:29,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:46:29,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:46:29,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:46:29,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 223 transitions, 2349 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:29,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:46:29,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:46:29,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:46:29,390 INFO L124 PetriNetUnfolderBase]: 1471/2477 cut-off events. [2024-06-20 17:46:29,391 INFO L125 PetriNetUnfolderBase]: For 99482/99494 co-relation queries the response was YES. [2024-06-20 17:46:29,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15344 conditions, 2477 events. 1471/2477 cut-off events. For 99482/99494 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 14218 event pairs, 343 based on Foata normal form. 13/2489 useless extension candidates. Maximal degree in co-relation 15252. Up to 2111 conditions per place. [2024-06-20 17:46:29,412 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 192 selfloop transitions, 59 changer transitions 0/258 dead transitions. [2024-06-20 17:46:29,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 258 transitions, 3191 flow [2024-06-20 17:46:29,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:46:29,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:46:29,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-20 17:46:29,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.596875 [2024-06-20 17:46:29,413 INFO L175 Difference]: Start difference. First operand has 200 places, 223 transitions, 2349 flow. Second operand 8 states and 191 transitions. [2024-06-20 17:46:29,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 258 transitions, 3191 flow [2024-06-20 17:46:29,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 258 transitions, 3121 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-20 17:46:29,565 INFO L231 Difference]: Finished difference. Result has 201 places, 229 transitions, 2487 flow [2024-06-20 17:46:29,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2279, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2487, PETRI_PLACES=201, PETRI_TRANSITIONS=229} [2024-06-20 17:46:29,566 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 160 predicate places. [2024-06-20 17:46:29,566 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 229 transitions, 2487 flow [2024-06-20 17:46:29,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:29,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:46:29,566 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:46:29,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-20 17:46:29,566 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:46:29,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:46:29,567 INFO L85 PathProgramCache]: Analyzing trace with hash 578020073, now seen corresponding path program 5 times [2024-06-20 17:46:29,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:46:29,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872507536] [2024-06-20 17:46:29,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:46:29,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:46:29,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:46:29,910 INFO 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 17:46:29,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:46:29,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872507536] [2024-06-20 17:46:29,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872507536] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:46:29,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:46:29,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:46:29,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725589255] [2024-06-20 17:46:29,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:46:29,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:46:29,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:46:29,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:46:29,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:46:29,956 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:46:29,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 229 transitions, 2487 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:29,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:46:29,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:46:29,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:46:30,306 INFO L124 PetriNetUnfolderBase]: 1484/2499 cut-off events. [2024-06-20 17:46:30,307 INFO L125 PetriNetUnfolderBase]: For 104983/104995 co-relation queries the response was YES. [2024-06-20 17:46:30,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15660 conditions, 2499 events. 1484/2499 cut-off events. For 104983/104995 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 14375 event pairs, 343 based on Foata normal form. 13/2511 useless extension candidates. Maximal degree in co-relation 15567. Up to 2126 conditions per place. [2024-06-20 17:46:30,329 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 187 selfloop transitions, 68 changer transitions 0/262 dead transitions. [2024-06-20 17:46:30,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 262 transitions, 3347 flow [2024-06-20 17:46:30,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:46:30,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:46:30,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 206 transitions. [2024-06-20 17:46:30,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5722222222222222 [2024-06-20 17:46:30,331 INFO L175 Difference]: Start difference. First operand has 201 places, 229 transitions, 2487 flow. Second operand 9 states and 206 transitions. [2024-06-20 17:46:30,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 262 transitions, 3347 flow [2024-06-20 17:46:30,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 262 transitions, 3131 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-06-20 17:46:30,499 INFO L231 Difference]: Finished difference. Result has 205 places, 235 transitions, 2509 flow [2024-06-20 17:46:30,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2305, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2509, PETRI_PLACES=205, PETRI_TRANSITIONS=235} [2024-06-20 17:46:30,499 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 164 predicate places. [2024-06-20 17:46:30,499 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 235 transitions, 2509 flow [2024-06-20 17:46:30,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:30,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:46:30,500 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 17:46:30,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-20 17:46:30,500 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:46:30,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:46:30,500 INFO L85 PathProgramCache]: Analyzing trace with hash -705674737, now seen corresponding path program 6 times [2024-06-20 17:46:30,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:46:30,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175596429] [2024-06-20 17:46:30,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:46:30,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:46:30,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:46:30,842 INFO 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 17:46:30,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:46:30,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175596429] [2024-06-20 17:46:30,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175596429] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:46:30,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:46:30,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:46:30,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942886733] [2024-06-20 17:46:30,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:46:30,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:46:30,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:46:30,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:46:30,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:46:30,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:46:30,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 235 transitions, 2509 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:30,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:46:30,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:46:30,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:46:31,222 INFO L124 PetriNetUnfolderBase]: 1481/2494 cut-off events. [2024-06-20 17:46:31,222 INFO L125 PetriNetUnfolderBase]: For 107175/107183 co-relation queries the response was YES. [2024-06-20 17:46:31,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15589 conditions, 2494 events. 1481/2494 cut-off events. For 107175/107183 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 14341 event pairs, 355 based on Foata normal form. 9/2501 useless extension candidates. Maximal degree in co-relation 15495. Up to 2123 conditions per place. [2024-06-20 17:46:31,245 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 188 selfloop transitions, 61 changer transitions 0/256 dead transitions. [2024-06-20 17:46:31,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 256 transitions, 3251 flow [2024-06-20 17:46:31,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:46:31,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:46:31,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-20 17:46:31,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6166666666666667 [2024-06-20 17:46:31,246 INFO L175 Difference]: Start difference. First operand has 205 places, 235 transitions, 2509 flow. Second operand 6 states and 148 transitions. [2024-06-20 17:46:31,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 256 transitions, 3251 flow [2024-06-20 17:46:31,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 256 transitions, 3109 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-20 17:46:31,420 INFO L231 Difference]: Finished difference. Result has 206 places, 235 transitions, 2495 flow [2024-06-20 17:46:31,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2367, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2495, PETRI_PLACES=206, PETRI_TRANSITIONS=235} [2024-06-20 17:46:31,420 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 165 predicate places. [2024-06-20 17:46:31,420 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 235 transitions, 2495 flow [2024-06-20 17:46:31,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:31,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:46:31,421 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 17:46:31,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-20 17:46:31,421 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:46:31,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:46:31,422 INFO L85 PathProgramCache]: Analyzing trace with hash -705554581, now seen corresponding path program 4 times [2024-06-20 17:46:31,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:46:31,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362837989] [2024-06-20 17:46:31,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:46:31,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:46:31,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:46:31,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:46:31,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:46:31,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362837989] [2024-06-20 17:46:31,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362837989] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:46:31,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:46:31,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:46:31,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706860974] [2024-06-20 17:46:31,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:46:31,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:46:31,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:46:31,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:46:31,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:46:31,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:46:31,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 235 transitions, 2495 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:31,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:46:31,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:46:31,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:46:32,241 INFO L124 PetriNetUnfolderBase]: 1478/2493 cut-off events. [2024-06-20 17:46:32,241 INFO L125 PetriNetUnfolderBase]: For 110028/110040 co-relation queries the response was YES. [2024-06-20 17:46:32,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15573 conditions, 2493 events. 1478/2493 cut-off events. For 110028/110040 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 14392 event pairs, 343 based on Foata normal form. 13/2505 useless extension candidates. Maximal degree in co-relation 15478. Up to 2163 conditions per place. [2024-06-20 17:46:32,263 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 192 selfloop transitions, 54 changer transitions 0/253 dead transitions. [2024-06-20 17:46:32,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 253 transitions, 3129 flow [2024-06-20 17:46:32,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:46:32,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:46:32,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-20 17:46:32,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5857142857142857 [2024-06-20 17:46:32,265 INFO L175 Difference]: Start difference. First operand has 206 places, 235 transitions, 2495 flow. Second operand 7 states and 164 transitions. [2024-06-20 17:46:32,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 253 transitions, 3129 flow [2024-06-20 17:46:32,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 253 transitions, 2977 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-20 17:46:32,440 INFO L231 Difference]: Finished difference. Result has 208 places, 235 transitions, 2461 flow [2024-06-20 17:46:32,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2343, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2461, PETRI_PLACES=208, PETRI_TRANSITIONS=235} [2024-06-20 17:46:32,441 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 167 predicate places. [2024-06-20 17:46:32,441 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 235 transitions, 2461 flow [2024-06-20 17:46:32,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:32,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:46:32,441 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 17:46:32,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-20 17:46:32,442 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:46:32,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:46:32,442 INFO L85 PathProgramCache]: Analyzing trace with hash -700013455, now seen corresponding path program 1 times [2024-06-20 17:46:32,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:46:32,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691891308] [2024-06-20 17:46:32,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:46:32,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:46:32,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:46:32,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:46:32,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:46:32,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691891308] [2024-06-20 17:46:32,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691891308] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:46:32,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:46:32,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:46:32,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121997447] [2024-06-20 17:46:32,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:46:32,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:46:32,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:46:32,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:46:32,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:46:32,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:46:32,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 235 transitions, 2461 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:32,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:46:32,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:46:32,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:46:33,195 INFO L124 PetriNetUnfolderBase]: 1491/2511 cut-off events. [2024-06-20 17:46:33,196 INFO L125 PetriNetUnfolderBase]: For 115479/115491 co-relation queries the response was YES. [2024-06-20 17:46:33,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15799 conditions, 2511 events. 1491/2511 cut-off events. For 115479/115491 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 14500 event pairs, 342 based on Foata normal form. 13/2523 useless extension candidates. Maximal degree in co-relation 15703. Up to 2178 conditions per place. [2024-06-20 17:46:33,220 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 197 selfloop transitions, 53 changer transitions 0/257 dead transitions. [2024-06-20 17:46:33,221 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 257 transitions, 3195 flow [2024-06-20 17:46:33,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:46:33,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:46:33,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 179 transitions. [2024-06-20 17:46:33,222 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.559375 [2024-06-20 17:46:33,222 INFO L175 Difference]: Start difference. First operand has 208 places, 235 transitions, 2461 flow. Second operand 8 states and 179 transitions. [2024-06-20 17:46:33,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 257 transitions, 3195 flow [2024-06-20 17:46:33,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 257 transitions, 3104 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-20 17:46:33,409 INFO L231 Difference]: Finished difference. Result has 211 places, 241 transitions, 2588 flow [2024-06-20 17:46:33,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2370, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2588, PETRI_PLACES=211, PETRI_TRANSITIONS=241} [2024-06-20 17:46:33,410 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 170 predicate places. [2024-06-20 17:46:33,410 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 241 transitions, 2588 flow [2024-06-20 17:46:33,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:33,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:46:33,410 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 17:46:33,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-20 17:46:33,410 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:46:33,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:46:33,411 INFO L85 PathProgramCache]: Analyzing trace with hash -705554767, now seen corresponding path program 7 times [2024-06-20 17:46:33,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:46:33,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107311826] [2024-06-20 17:46:33,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:46:33,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:46:33,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:46:33,792 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 17:46:33,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:46:33,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107311826] [2024-06-20 17:46:33,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107311826] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:46:33,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:46:33,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:46:33,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621715163] [2024-06-20 17:46:33,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:46:33,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:46:33,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:46:33,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:46:33,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:46:33,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:46:33,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 241 transitions, 2588 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:33,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:46:33,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:46:33,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:46:34,237 INFO L124 PetriNetUnfolderBase]: 1488/2507 cut-off events. [2024-06-20 17:46:34,237 INFO L125 PetriNetUnfolderBase]: For 119457/119469 co-relation queries the response was YES. [2024-06-20 17:46:34,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16044 conditions, 2507 events. 1488/2507 cut-off events. For 119457/119469 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 14430 event pairs, 342 based on Foata normal form. 13/2519 useless extension candidates. Maximal degree in co-relation 15947. Up to 2208 conditions per place. [2024-06-20 17:46:34,261 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 216 selfloop transitions, 34 changer transitions 0/257 dead transitions. [2024-06-20 17:46:34,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 257 transitions, 3128 flow [2024-06-20 17:46:34,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:46:34,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:46:34,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-20 17:46:34,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5875 [2024-06-20 17:46:34,262 INFO L175 Difference]: Start difference. First operand has 211 places, 241 transitions, 2588 flow. Second operand 6 states and 141 transitions. [2024-06-20 17:46:34,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 257 transitions, 3128 flow [2024-06-20 17:46:34,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 257 transitions, 3010 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-20 17:46:34,471 INFO L231 Difference]: Finished difference. Result has 212 places, 241 transitions, 2544 flow [2024-06-20 17:46:34,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2470, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2544, PETRI_PLACES=212, PETRI_TRANSITIONS=241} [2024-06-20 17:46:34,472 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 171 predicate places. [2024-06-20 17:46:34,472 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 241 transitions, 2544 flow [2024-06-20 17:46:34,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:34,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:46:34,473 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:46:34,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-20 17:46:34,473 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:46:34,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:46:34,473 INFO L85 PathProgramCache]: Analyzing trace with hash 620164139, now seen corresponding path program 5 times [2024-06-20 17:46:34,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:46:34,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027125943] [2024-06-20 17:46:34,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:46:34,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:46:34,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:46:34,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:46:34,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:46:34,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027125943] [2024-06-20 17:46:34,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027125943] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:46:34,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:46:34,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:46:34,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959741572] [2024-06-20 17:46:34,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:46:34,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:46:34,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:46:34,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:46:34,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:46:34,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:46:34,862 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 241 transitions, 2544 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:34,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:46:34,862 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:46:34,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:46:35,250 INFO L124 PetriNetUnfolderBase]: 1493/2518 cut-off events. [2024-06-20 17:46:35,250 INFO L125 PetriNetUnfolderBase]: For 119698/119710 co-relation queries the response was YES. [2024-06-20 17:46:35,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16096 conditions, 2518 events. 1493/2518 cut-off events. For 119698/119710 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 14576 event pairs, 342 based on Foata normal form. 13/2530 useless extension candidates. Maximal degree in co-relation 15998. Up to 2183 conditions per place. [2024-06-20 17:46:35,270 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 197 selfloop transitions, 57 changer transitions 0/261 dead transitions. [2024-06-20 17:46:35,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 261 transitions, 3242 flow [2024-06-20 17:46:35,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:46:35,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:46:35,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-20 17:46:35,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6041666666666666 [2024-06-20 17:46:35,271 INFO L175 Difference]: Start difference. First operand has 212 places, 241 transitions, 2544 flow. Second operand 6 states and 145 transitions. [2024-06-20 17:46:35,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 261 transitions, 3242 flow [2024-06-20 17:46:35,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 261 transitions, 3166 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-20 17:46:35,460 INFO L231 Difference]: Finished difference. Result has 213 places, 244 transitions, 2646 flow [2024-06-20 17:46:35,460 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2468, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2646, PETRI_PLACES=213, PETRI_TRANSITIONS=244} [2024-06-20 17:46:35,461 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 172 predicate places. [2024-06-20 17:46:35,461 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 244 transitions, 2646 flow [2024-06-20 17:46:35,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:35,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:46:35,461 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 17:46:35,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-20 17:46:35,461 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:46:35,462 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:46:35,462 INFO L85 PathProgramCache]: Analyzing trace with hash 620169533, now seen corresponding path program 8 times [2024-06-20 17:46:35,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:46:35,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889900066] [2024-06-20 17:46:35,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:46:35,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:46:35,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:46:35,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:46:35,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:46:35,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889900066] [2024-06-20 17:46:35,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889900066] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:46:35,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:46:35,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:46:35,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722055236] [2024-06-20 17:46:35,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:46:35,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:46:35,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:46:35,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:46:35,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:46:35,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:46:35,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 244 transitions, 2646 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:35,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:46:35,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:46:35,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:46:36,240 INFO L124 PetriNetUnfolderBase]: 1490/2514 cut-off events. [2024-06-20 17:46:36,240 INFO L125 PetriNetUnfolderBase]: For 122689/122701 co-relation queries the response was YES. [2024-06-20 17:46:36,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16180 conditions, 2514 events. 1490/2514 cut-off events. For 122689/122701 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 14534 event pairs, 342 based on Foata normal form. 13/2526 useless extension candidates. Maximal degree in co-relation 16081. Up to 2155 conditions per place. [2024-06-20 17:46:36,263 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 206 selfloop transitions, 54 changer transitions 0/267 dead transitions. [2024-06-20 17:46:36,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 267 transitions, 3328 flow [2024-06-20 17:46:36,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:46:36,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:46:36,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-20 17:46:36,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6291666666666667 [2024-06-20 17:46:36,265 INFO L175 Difference]: Start difference. First operand has 213 places, 244 transitions, 2646 flow. Second operand 6 states and 151 transitions. [2024-06-20 17:46:36,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 267 transitions, 3328 flow [2024-06-20 17:46:36,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 267 transitions, 3198 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-20 17:46:36,488 INFO L231 Difference]: Finished difference. Result has 214 places, 244 transitions, 2638 flow [2024-06-20 17:46:36,488 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2520, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2638, PETRI_PLACES=214, PETRI_TRANSITIONS=244} [2024-06-20 17:46:36,488 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 173 predicate places. [2024-06-20 17:46:36,488 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 244 transitions, 2638 flow [2024-06-20 17:46:36,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:36,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:46:36,489 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:46:36,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-20 17:46:36,489 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:46:36,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:46:36,490 INFO L85 PathProgramCache]: Analyzing trace with hash 620175299, now seen corresponding path program 6 times [2024-06-20 17:46:36,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:46:36,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378166552] [2024-06-20 17:46:36,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:46:36,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:46:36,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:46:36,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:46:36,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:46:36,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378166552] [2024-06-20 17:46:36,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378166552] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:46:36,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:46:36,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:46:36,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977148606] [2024-06-20 17:46:36,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:46:36,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:46:36,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:46:36,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:46:36,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:46:36,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:46:36,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 244 transitions, 2638 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:36,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:46:36,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:46:36,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:46:37,411 INFO L124 PetriNetUnfolderBase]: 1487/2508 cut-off events. [2024-06-20 17:46:37,412 INFO L125 PetriNetUnfolderBase]: For 117571/117583 co-relation queries the response was YES. [2024-06-20 17:46:37,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16021 conditions, 2508 events. 1487/2508 cut-off events. For 117571/117583 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 14487 event pairs, 342 based on Foata normal form. 13/2520 useless extension candidates. Maximal degree in co-relation 15923. Up to 2176 conditions per place. [2024-06-20 17:46:37,444 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 197 selfloop transitions, 57 changer transitions 0/261 dead transitions. [2024-06-20 17:46:37,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 261 transitions, 3188 flow [2024-06-20 17:46:37,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:46:37,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:46:37,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 162 transitions. [2024-06-20 17:46:37,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5785714285714286 [2024-06-20 17:46:37,446 INFO L175 Difference]: Start difference. First operand has 214 places, 244 transitions, 2638 flow. Second operand 7 states and 162 transitions. [2024-06-20 17:46:37,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 261 transitions, 3188 flow [2024-06-20 17:46:37,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 261 transitions, 3026 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-20 17:46:37,636 INFO L231 Difference]: Finished difference. Result has 214 places, 244 transitions, 2600 flow [2024-06-20 17:46:37,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2476, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2600, PETRI_PLACES=214, PETRI_TRANSITIONS=244} [2024-06-20 17:46:37,637 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 173 predicate places. [2024-06-20 17:46:37,637 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 244 transitions, 2600 flow [2024-06-20 17:46:37,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:37,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:46:37,637 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 17:46:37,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-20 17:46:37,638 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:46:37,638 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:46:37,638 INFO L85 PathProgramCache]: Analyzing trace with hash 620175485, now seen corresponding path program 2 times [2024-06-20 17:46:37,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:46:37,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315733120] [2024-06-20 17:46:37,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:46:37,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:46:37,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:46:38,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:46:38,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:46:38,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315733120] [2024-06-20 17:46:38,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315733120] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:46:38,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:46:38,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:46:38,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954562502] [2024-06-20 17:46:38,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:46:38,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:46:38,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:46:38,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:46:38,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:46:38,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:46:38,051 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 244 transitions, 2600 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:38,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:46:38,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:46:38,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:46:38,395 INFO L124 PetriNetUnfolderBase]: 1516/2555 cut-off events. [2024-06-20 17:46:38,395 INFO L125 PetriNetUnfolderBase]: For 118939/118951 co-relation queries the response was YES. [2024-06-20 17:46:38,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16317 conditions, 2555 events. 1516/2555 cut-off events. For 118939/118951 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 14743 event pairs, 342 based on Foata normal form. 13/2567 useless extension candidates. Maximal degree in co-relation 16219. Up to 2234 conditions per place. [2024-06-20 17:46:38,418 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 218 selfloop transitions, 46 changer transitions 0/271 dead transitions. [2024-06-20 17:46:38,419 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 271 transitions, 3422 flow [2024-06-20 17:46:38,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:46:38,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:46:38,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 160 transitions. [2024-06-20 17:46:38,420 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-20 17:46:38,420 INFO L175 Difference]: Start difference. First operand has 214 places, 244 transitions, 2600 flow. Second operand 7 states and 160 transitions. [2024-06-20 17:46:38,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 271 transitions, 3422 flow [2024-06-20 17:46:38,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 271 transitions, 3256 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-20 17:46:38,592 INFO L231 Difference]: Finished difference. Result has 214 places, 256 transitions, 2727 flow [2024-06-20 17:46:38,593 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2436, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2727, PETRI_PLACES=214, PETRI_TRANSITIONS=256} [2024-06-20 17:46:38,593 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 173 predicate places. [2024-06-20 17:46:38,593 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 256 transitions, 2727 flow [2024-06-20 17:46:38,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:38,593 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:46:38,593 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:46:38,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-20 17:46:38,594 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:46:38,594 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:46:38,594 INFO L85 PathProgramCache]: Analyzing trace with hash 620169905, now seen corresponding path program 3 times [2024-06-20 17:46:38,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:46:38,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536690969] [2024-06-20 17:46:38,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:46:38,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:46:38,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:46:38,938 INFO 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 17:46:38,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:46:38,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536690969] [2024-06-20 17:46:38,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536690969] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:46:38,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:46:38,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:46:38,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836571453] [2024-06-20 17:46:38,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:46:38,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:46:38,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:46:38,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:46:38,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:46:38,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:46:38,989 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 256 transitions, 2727 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:38,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:46:38,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:46:38,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:46:39,451 INFO L124 PetriNetUnfolderBase]: 1513/2551 cut-off events. [2024-06-20 17:46:39,451 INFO L125 PetriNetUnfolderBase]: For 117278/117292 co-relation queries the response was YES. [2024-06-20 17:46:39,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16259 conditions, 2551 events. 1513/2551 cut-off events. For 117278/117292 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 14737 event pairs, 342 based on Foata normal form. 15/2565 useless extension candidates. Maximal degree in co-relation 16160. Up to 2231 conditions per place. [2024-06-20 17:46:39,472 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 216 selfloop transitions, 46 changer transitions 0/269 dead transitions. [2024-06-20 17:46:39,473 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 269 transitions, 3283 flow [2024-06-20 17:46:39,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:46:39,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:46:39,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-20 17:46:39,474 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5875 [2024-06-20 17:46:39,474 INFO L175 Difference]: Start difference. First operand has 214 places, 256 transitions, 2727 flow. Second operand 6 states and 141 transitions. [2024-06-20 17:46:39,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 269 transitions, 3283 flow [2024-06-20 17:46:39,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 269 transitions, 3200 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-20 17:46:39,649 INFO L231 Difference]: Finished difference. Result has 217 places, 256 transitions, 2746 flow [2024-06-20 17:46:39,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2644, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2746, PETRI_PLACES=217, PETRI_TRANSITIONS=256} [2024-06-20 17:46:39,649 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 176 predicate places. [2024-06-20 17:46:39,649 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 256 transitions, 2746 flow [2024-06-20 17:46:39,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:39,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:46:39,650 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 17:46:39,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-20 17:46:39,650 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:46:39,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:46:39,650 INFO L85 PathProgramCache]: Analyzing trace with hash 620163953, now seen corresponding path program 9 times [2024-06-20 17:46:39,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:46:39,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610650938] [2024-06-20 17:46:39,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:46:39,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:46:39,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:46:40,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:46:40,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:46:40,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610650938] [2024-06-20 17:46:40,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610650938] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:46:40,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:46:40,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:46:40,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887857329] [2024-06-20 17:46:40,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:46:40,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:46:40,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:46:40,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:46:40,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:46:40,052 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:46:40,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 256 transitions, 2746 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:40,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:46:40,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:46:40,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:46:40,464 INFO L124 PetriNetUnfolderBase]: 1510/2545 cut-off events. [2024-06-20 17:46:40,464 INFO L125 PetriNetUnfolderBase]: For 115943/115957 co-relation queries the response was YES. [2024-06-20 17:46:40,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16252 conditions, 2545 events. 1510/2545 cut-off events. For 115943/115957 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 14722 event pairs, 342 based on Foata normal form. 15/2559 useless extension candidates. Maximal degree in co-relation 16152. Up to 2173 conditions per place. [2024-06-20 17:46:40,490 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 215 selfloop transitions, 60 changer transitions 0/282 dead transitions. [2024-06-20 17:46:40,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 282 transitions, 3362 flow [2024-06-20 17:46:40,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:46:40,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:46:40,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-20 17:46:40,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6107142857142858 [2024-06-20 17:46:40,491 INFO L175 Difference]: Start difference. First operand has 217 places, 256 transitions, 2746 flow. Second operand 7 states and 171 transitions. [2024-06-20 17:46:40,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 282 transitions, 3362 flow [2024-06-20 17:46:40,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 282 transitions, 3252 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-20 17:46:40,710 INFO L231 Difference]: Finished difference. Result has 218 places, 256 transitions, 2770 flow [2024-06-20 17:46:40,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2636, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2770, PETRI_PLACES=218, PETRI_TRANSITIONS=256} [2024-06-20 17:46:40,710 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 177 predicate places. [2024-06-20 17:46:40,711 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 256 transitions, 2770 flow [2024-06-20 17:46:40,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:40,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:46:40,711 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 17:46:40,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-20 17:46:40,711 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:46:40,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:46:40,712 INFO L85 PathProgramCache]: Analyzing trace with hash -368055421, now seen corresponding path program 7 times [2024-06-20 17:46:40,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:46:40,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595347613] [2024-06-20 17:46:40,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:46:40,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:46:40,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:46:41,089 INFO 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 17:46:41,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:46:41,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595347613] [2024-06-20 17:46:41,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595347613] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:46:41,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:46:41,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:46:41,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073500713] [2024-06-20 17:46:41,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:46:41,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:46:41,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:46:41,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:46:41,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:46:41,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:46:41,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 256 transitions, 2770 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:41,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:46:41,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:46:41,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:46:41,524 INFO L124 PetriNetUnfolderBase]: 1515/2551 cut-off events. [2024-06-20 17:46:41,524 INFO L125 PetriNetUnfolderBase]: For 116508/116518 co-relation queries the response was YES. [2024-06-20 17:46:41,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16357 conditions, 2551 events. 1515/2551 cut-off events. For 116508/116518 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 14758 event pairs, 364 based on Foata normal form. 8/2557 useless extension candidates. Maximal degree in co-relation 16257. Up to 2180 conditions per place. [2024-06-20 17:46:41,547 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 189 selfloop transitions, 74 changer transitions 0/270 dead transitions. [2024-06-20 17:46:41,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 270 transitions, 3463 flow [2024-06-20 17:46:41,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:46:41,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:46:41,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 138 transitions. [2024-06-20 17:46:41,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-20 17:46:41,548 INFO L175 Difference]: Start difference. First operand has 218 places, 256 transitions, 2770 flow. Second operand 6 states and 138 transitions. [2024-06-20 17:46:41,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 270 transitions, 3463 flow [2024-06-20 17:46:41,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 270 transitions, 3327 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-20 17:46:41,763 INFO L231 Difference]: Finished difference. Result has 216 places, 259 transitions, 2831 flow [2024-06-20 17:46:41,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2638, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2831, PETRI_PLACES=216, PETRI_TRANSITIONS=259} [2024-06-20 17:46:41,764 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 175 predicate places. [2024-06-20 17:46:41,764 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 259 transitions, 2831 flow [2024-06-20 17:46:41,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:41,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:46:41,764 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:46:41,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-20 17:46:41,764 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:46:41,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:46:41,765 INFO L85 PathProgramCache]: Analyzing trace with hash -379017331, now seen corresponding path program 8 times [2024-06-20 17:46:41,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:46:41,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562706607] [2024-06-20 17:46:41,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:46:41,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:46:41,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:46:42,108 INFO 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 17:46:42,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:46:42,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562706607] [2024-06-20 17:46:42,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562706607] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:46:42,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:46:42,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:46:42,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641914088] [2024-06-20 17:46:42,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:46:42,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:46:42,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:46:42,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:46:42,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:46:42,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:46:42,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 259 transitions, 2831 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:42,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:46:42,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:46:42,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:46:42,617 INFO L124 PetriNetUnfolderBase]: 1520/2561 cut-off events. [2024-06-20 17:46:42,617 INFO L125 PetriNetUnfolderBase]: For 112252/112266 co-relation queries the response was YES. [2024-06-20 17:46:42,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16315 conditions, 2561 events. 1520/2561 cut-off events. For 112252/112266 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 14817 event pairs, 342 based on Foata normal form. 15/2575 useless extension candidates. Maximal degree in co-relation 16216. Up to 2186 conditions per place. [2024-06-20 17:46:42,638 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 192 selfloop transitions, 86 changer transitions 0/285 dead transitions. [2024-06-20 17:46:42,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 285 transitions, 3588 flow [2024-06-20 17:46:42,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:46:42,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:46:42,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 202 transitions. [2024-06-20 17:46:42,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5611111111111111 [2024-06-20 17:46:42,640 INFO L175 Difference]: Start difference. First operand has 216 places, 259 transitions, 2831 flow. Second operand 9 states and 202 transitions. [2024-06-20 17:46:42,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 285 transitions, 3588 flow [2024-06-20 17:46:42,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 285 transitions, 3460 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-20 17:46:42,843 INFO L231 Difference]: Finished difference. Result has 222 places, 262 transitions, 2934 flow [2024-06-20 17:46:42,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2706, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2934, PETRI_PLACES=222, PETRI_TRANSITIONS=262} [2024-06-20 17:46:42,843 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 181 predicate places. [2024-06-20 17:46:42,843 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 262 transitions, 2934 flow [2024-06-20 17:46:42,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:42,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:46:42,844 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 17:46:42,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-20 17:46:42,844 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:46:42,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:46:42,844 INFO L85 PathProgramCache]: Analyzing trace with hash -379017517, now seen corresponding path program 10 times [2024-06-20 17:46:42,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:46:42,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973954235] [2024-06-20 17:46:42,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:46:42,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:46:42,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:46:43,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:46:43,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:46:43,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973954235] [2024-06-20 17:46:43,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973954235] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:46:43,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:46:43,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:46:43,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621226969] [2024-06-20 17:46:43,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:46:43,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:46:43,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:46:43,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:46:43,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:46:43,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:46:43,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 262 transitions, 2934 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:43,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:46:43,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:46:43,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:46:43,601 INFO L124 PetriNetUnfolderBase]: 1517/2557 cut-off events. [2024-06-20 17:46:43,601 INFO L125 PetriNetUnfolderBase]: For 115074/115088 co-relation queries the response was YES. [2024-06-20 17:46:43,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16368 conditions, 2557 events. 1517/2557 cut-off events. For 115074/115088 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 14835 event pairs, 342 based on Foata normal form. 15/2571 useless extension candidates. Maximal degree in co-relation 16268. Up to 2147 conditions per place. [2024-06-20 17:46:43,625 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 202 selfloop transitions, 83 changer transitions 0/292 dead transitions. [2024-06-20 17:46:43,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 292 transitions, 3580 flow [2024-06-20 17:46:43,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:46:43,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:46:43,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-20 17:46:43,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.603125 [2024-06-20 17:46:43,628 INFO L175 Difference]: Start difference. First operand has 222 places, 262 transitions, 2934 flow. Second operand 8 states and 193 transitions. [2024-06-20 17:46:43,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 292 transitions, 3580 flow [2024-06-20 17:46:43,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 292 transitions, 3384 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-06-20 17:46:43,845 INFO L231 Difference]: Finished difference. Result has 222 places, 262 transitions, 2922 flow [2024-06-20 17:46:43,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2738, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2922, PETRI_PLACES=222, PETRI_TRANSITIONS=262} [2024-06-20 17:46:43,845 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 181 predicate places. [2024-06-20 17:46:43,845 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 262 transitions, 2922 flow [2024-06-20 17:46:43,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:43,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:46:43,846 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:46:43,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-20 17:46:43,846 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:46:43,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:46:43,846 INFO L85 PathProgramCache]: Analyzing trace with hash -378780181, now seen corresponding path program 9 times [2024-06-20 17:46:43,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:46:43,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052472252] [2024-06-20 17:46:43,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:46:43,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:46:43,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:46:44,180 INFO 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 17:46:44,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:46:44,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052472252] [2024-06-20 17:46:44,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052472252] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:46:44,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:46:44,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:46:44,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317135172] [2024-06-20 17:46:44,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:46:44,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:46:44,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:46:44,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:46:44,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:46:44,235 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:46:44,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 262 transitions, 2922 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:44,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:46:44,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:46:44,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:46:44,582 INFO L124 PetriNetUnfolderBase]: 1514/2553 cut-off events. [2024-06-20 17:46:44,583 INFO L125 PetriNetUnfolderBase]: For 109934/109948 co-relation queries the response was YES. [2024-06-20 17:46:44,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16233 conditions, 2553 events. 1514/2553 cut-off events. For 109934/109948 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 14777 event pairs, 342 based on Foata normal form. 15/2567 useless extension candidates. Maximal degree in co-relation 16134. Up to 2179 conditions per place. [2024-06-20 17:46:44,611 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 191 selfloop transitions, 82 changer transitions 0/280 dead transitions. [2024-06-20 17:46:44,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 280 transitions, 3512 flow [2024-06-20 17:46:44,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:46:44,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:46:44,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-20 17:46:44,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-06-20 17:46:44,612 INFO L175 Difference]: Start difference. First operand has 222 places, 262 transitions, 2922 flow. Second operand 8 states and 180 transitions. [2024-06-20 17:46:44,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 280 transitions, 3512 flow [2024-06-20 17:46:44,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 280 transitions, 3312 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-20 17:46:44,801 INFO L231 Difference]: Finished difference. Result has 222 places, 262 transitions, 2896 flow [2024-06-20 17:46:44,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2722, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2896, PETRI_PLACES=222, PETRI_TRANSITIONS=262} [2024-06-20 17:46:44,812 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 181 predicate places. [2024-06-20 17:46:44,812 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 262 transitions, 2896 flow [2024-06-20 17:46:44,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:44,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:46:44,813 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:46:44,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-20 17:46:44,813 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:46:44,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:46:44,813 INFO L85 PathProgramCache]: Analyzing trace with hash -368058397, now seen corresponding path program 4 times [2024-06-20 17:46:44,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:46:44,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471040329] [2024-06-20 17:46:44,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:46:44,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:46:44,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:46:45,175 INFO 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 17:46:45,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:46:45,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471040329] [2024-06-20 17:46:45,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471040329] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:46:45,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:46:45,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:46:45,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137353180] [2024-06-20 17:46:45,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:46:45,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:46:45,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:46:45,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:46:45,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:46:45,223 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:46:45,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 262 transitions, 2896 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:45,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:46:45,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:46:45,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:46:45,588 INFO L124 PetriNetUnfolderBase]: 1542/2592 cut-off events. [2024-06-20 17:46:45,588 INFO L125 PetriNetUnfolderBase]: For 110572/110576 co-relation queries the response was YES. [2024-06-20 17:46:45,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16250 conditions, 2592 events. 1542/2592 cut-off events. For 110572/110576 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 14963 event pairs, 341 based on Foata normal form. 9/2599 useless extension candidates. Maximal degree in co-relation 16151. Up to 2296 conditions per place. [2024-06-20 17:46:45,612 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 242 selfloop transitions, 29 changer transitions 0/278 dead transitions. [2024-06-20 17:46:45,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 278 transitions, 3516 flow [2024-06-20 17:46:45,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:46:45,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:46:45,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 136 transitions. [2024-06-20 17:46:45,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5666666666666667 [2024-06-20 17:46:45,613 INFO L175 Difference]: Start difference. First operand has 222 places, 262 transitions, 2896 flow. Second operand 6 states and 136 transitions. [2024-06-20 17:46:45,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 278 transitions, 3516 flow [2024-06-20 17:46:45,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 278 transitions, 3296 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-06-20 17:46:45,778 INFO L231 Difference]: Finished difference. Result has 219 places, 263 transitions, 2754 flow [2024-06-20 17:46:45,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2676, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2754, PETRI_PLACES=219, PETRI_TRANSITIONS=263} [2024-06-20 17:46:45,779 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 178 predicate places. [2024-06-20 17:46:45,779 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 263 transitions, 2754 flow [2024-06-20 17:46:45,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:45,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:46:45,779 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 17:46:45,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-20 17:46:45,779 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:46:45,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:46:45,780 INFO L85 PathProgramCache]: Analyzing trace with hash -378783157, now seen corresponding path program 5 times [2024-06-20 17:46:45,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:46:45,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466279270] [2024-06-20 17:46:45,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:46:45,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:46:45,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:46:46,120 INFO 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 17:46:46,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:46:46,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466279270] [2024-06-20 17:46:46,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466279270] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:46:46,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:46:46,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:46:46,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151614961] [2024-06-20 17:46:46,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:46:46,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:46:46,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:46:46,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:46:46,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:46:46,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:46:46,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 263 transitions, 2754 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:46,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:46:46,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:46:46,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:46:46,569 INFO L124 PetriNetUnfolderBase]: 1557/2624 cut-off events. [2024-06-20 17:46:46,570 INFO L125 PetriNetUnfolderBase]: For 107702/107710 co-relation queries the response was YES. [2024-06-20 17:46:46,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16199 conditions, 2624 events. 1557/2624 cut-off events. For 107702/107710 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 15205 event pairs, 337 based on Foata normal form. 16/2639 useless extension candidates. Maximal degree in co-relation 16100. Up to 2289 conditions per place. [2024-06-20 17:46:46,595 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 248 selfloop transitions, 32 changer transitions 0/287 dead transitions. [2024-06-20 17:46:46,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 287 transitions, 3414 flow [2024-06-20 17:46:46,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:46:46,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:46:46,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 177 transitions. [2024-06-20 17:46:46,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.553125 [2024-06-20 17:46:46,597 INFO L175 Difference]: Start difference. First operand has 219 places, 263 transitions, 2754 flow. Second operand 8 states and 177 transitions. [2024-06-20 17:46:46,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 287 transitions, 3414 flow [2024-06-20 17:46:46,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 287 transitions, 3353 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-20 17:46:46,765 INFO L231 Difference]: Finished difference. Result has 223 places, 264 transitions, 2782 flow [2024-06-20 17:46:46,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2693, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2782, PETRI_PLACES=223, PETRI_TRANSITIONS=264} [2024-06-20 17:46:46,765 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 182 predicate places. [2024-06-20 17:46:46,766 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 264 transitions, 2782 flow [2024-06-20 17:46:46,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:46,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:46:46,766 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:46:46,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-20 17:46:46,766 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:46:46,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:46:46,767 INFO L85 PathProgramCache]: Analyzing trace with hash -379109587, now seen corresponding path program 6 times [2024-06-20 17:46:46,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:46:46,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560003586] [2024-06-20 17:46:46,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:46:46,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:46:46,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:46:47,115 INFO 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 17:46:47,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:46:47,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560003586] [2024-06-20 17:46:47,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560003586] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:46:47,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:46:47,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:46:47,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962567012] [2024-06-20 17:46:47,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:46:47,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:46:47,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:46:47,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:46:47,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:46:47,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:46:47,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 264 transitions, 2782 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:47,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:46:47,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:46:47,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:46:47,599 INFO L124 PetriNetUnfolderBase]: 1544/2605 cut-off events. [2024-06-20 17:46:47,599 INFO L125 PetriNetUnfolderBase]: For 102209/102217 co-relation queries the response was YES. [2024-06-20 17:46:47,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15914 conditions, 2605 events. 1544/2605 cut-off events. For 102209/102217 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 15124 event pairs, 245 based on Foata normal form. 14/2618 useless extension candidates. Maximal degree in co-relation 15814. Up to 2116 conditions per place. [2024-06-20 17:46:47,620 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 243 selfloop transitions, 43 changer transitions 0/293 dead transitions. [2024-06-20 17:46:47,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 293 transitions, 3467 flow [2024-06-20 17:46:47,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:46:47,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:46:47,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-20 17:46:47,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.571875 [2024-06-20 17:46:47,621 INFO L175 Difference]: Start difference. First operand has 223 places, 264 transitions, 2782 flow. Second operand 8 states and 183 transitions. [2024-06-20 17:46:47,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 293 transitions, 3467 flow [2024-06-20 17:46:47,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 293 transitions, 3395 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-20 17:46:47,786 INFO L231 Difference]: Finished difference. Result has 225 places, 264 transitions, 2804 flow [2024-06-20 17:46:47,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2710, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2804, PETRI_PLACES=225, PETRI_TRANSITIONS=264} [2024-06-20 17:46:47,786 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 184 predicate places. [2024-06-20 17:46:47,786 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 264 transitions, 2804 flow [2024-06-20 17:46:47,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:47,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:46:47,787 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:46:47,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-20 17:46:47,787 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:46:47,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:46:47,787 INFO L85 PathProgramCache]: Analyzing trace with hash -367658683, now seen corresponding path program 1 times [2024-06-20 17:46:47,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:46:47,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679401463] [2024-06-20 17:46:47,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:46:47,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:46:47,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:46:48,129 INFO 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 17:46:48,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:46:48,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679401463] [2024-06-20 17:46:48,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679401463] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:46:48,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:46:48,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:46:48,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610407401] [2024-06-20 17:46:48,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:46:48,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:46:48,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:46:48,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:46:48,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:46:48,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:46:48,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 264 transitions, 2804 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:48,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:46:48,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:46:48,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:46:48,553 INFO L124 PetriNetUnfolderBase]: 1564/2638 cut-off events. [2024-06-20 17:46:48,553 INFO L125 PetriNetUnfolderBase]: For 102880/102884 co-relation queries the response was YES. [2024-06-20 17:46:48,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16118 conditions, 2638 events. 1564/2638 cut-off events. For 102880/102884 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 15311 event pairs, 337 based on Foata normal form. 7/2643 useless extension candidates. Maximal degree in co-relation 16017. Up to 2234 conditions per place. [2024-06-20 17:46:48,578 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 245 selfloop transitions, 34 changer transitions 0/286 dead transitions. [2024-06-20 17:46:48,579 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 286 transitions, 3479 flow [2024-06-20 17:46:48,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:46:48,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:46:48,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 139 transitions. [2024-06-20 17:46:48,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5791666666666667 [2024-06-20 17:46:48,580 INFO L175 Difference]: Start difference. First operand has 225 places, 264 transitions, 2804 flow. Second operand 6 states and 139 transitions. [2024-06-20 17:46:48,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 286 transitions, 3479 flow [2024-06-20 17:46:48,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 286 transitions, 3387 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-20 17:46:48,751 INFO L231 Difference]: Finished difference. Result has 225 places, 268 transitions, 2836 flow [2024-06-20 17:46:48,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2712, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2836, PETRI_PLACES=225, PETRI_TRANSITIONS=268} [2024-06-20 17:46:48,751 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 184 predicate places. [2024-06-20 17:46:48,752 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 268 transitions, 2836 flow [2024-06-20 17:46:48,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:48,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:46:48,752 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 17:46:48,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-20 17:46:48,752 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:46:48,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:46:48,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1463740081, now seen corresponding path program 4 times [2024-06-20 17:46:48,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:46:48,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141988569] [2024-06-20 17:46:48,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:46:48,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:46:48,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:46:49,113 INFO 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 17:46:49,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:46:49,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141988569] [2024-06-20 17:46:49,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141988569] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:46:49,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:46:49,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:46:49,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073442199] [2024-06-20 17:46:49,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:46:49,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:46:49,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:46:49,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:46:49,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:46:49,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:46:49,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 268 transitions, 2836 flow. Second operand has 9 states, 9 states have (on average 15.666666666666666) internal successors, (141), 9 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:49,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:46:49,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:46:49,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:46:49,568 INFO L124 PetriNetUnfolderBase]: 1569/2647 cut-off events. [2024-06-20 17:46:49,568 INFO L125 PetriNetUnfolderBase]: For 93458/93464 co-relation queries the response was YES. [2024-06-20 17:46:49,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16139 conditions, 2647 events. 1569/2647 cut-off events. For 93458/93464 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 15395 event pairs, 335 based on Foata normal form. 7/2653 useless extension candidates. Maximal degree in co-relation 16037. Up to 2271 conditions per place. [2024-06-20 17:46:49,594 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 223 selfloop transitions, 73 changer transitions 0/303 dead transitions. [2024-06-20 17:46:49,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 303 transitions, 3705 flow [2024-06-20 17:46:49,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 17:46:49,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 17:46:49,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 242 transitions. [2024-06-20 17:46:49,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-06-20 17:46:49,596 INFO L175 Difference]: Start difference. First operand has 225 places, 268 transitions, 2836 flow. Second operand 11 states and 242 transitions. [2024-06-20 17:46:49,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 303 transitions, 3705 flow [2024-06-20 17:46:49,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 303 transitions, 3664 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-06-20 17:46:49,786 INFO L231 Difference]: Finished difference. Result has 234 places, 274 transitions, 3061 flow [2024-06-20 17:46:49,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2795, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3061, PETRI_PLACES=234, PETRI_TRANSITIONS=274} [2024-06-20 17:46:49,786 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 193 predicate places. [2024-06-20 17:46:49,786 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 274 transitions, 3061 flow [2024-06-20 17:46:49,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.666666666666666) internal successors, (141), 9 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:49,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:46:49,787 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:46:49,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-20 17:46:49,787 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:46:49,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:46:49,787 INFO L85 PathProgramCache]: Analyzing trace with hash 1111954481, now seen corresponding path program 5 times [2024-06-20 17:46:49,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:46:49,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446939947] [2024-06-20 17:46:49,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:46:49,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:46:49,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:46:50,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:46:50,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:46:50,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446939947] [2024-06-20 17:46:50,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446939947] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:46:50,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:46:50,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:46:50,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239371434] [2024-06-20 17:46:50,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:46:50,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:46:50,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:46:50,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:46:50,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:46:50,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:46:50,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 274 transitions, 3061 flow. Second operand has 9 states, 9 states have (on average 15.666666666666666) internal successors, (141), 9 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:50,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:46:50,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:46:50,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:46:50,671 INFO L124 PetriNetUnfolderBase]: 1566/2642 cut-off events. [2024-06-20 17:46:50,671 INFO L125 PetriNetUnfolderBase]: For 97392/97402 co-relation queries the response was YES. [2024-06-20 17:46:50,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16481 conditions, 2642 events. 1566/2642 cut-off events. For 97392/97402 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 15371 event pairs, 348 based on Foata normal form. 11/2652 useless extension candidates. Maximal degree in co-relation 16377. Up to 2325 conditions per place. [2024-06-20 17:46:50,695 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 241 selfloop transitions, 38 changer transitions 0/286 dead transitions. [2024-06-20 17:46:50,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 286 transitions, 3649 flow [2024-06-20 17:46:50,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 17:46:50,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 17:46:50,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 120 transitions. [2024-06-20 17:46:50,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-20 17:46:50,696 INFO L175 Difference]: Start difference. First operand has 234 places, 274 transitions, 3061 flow. Second operand 5 states and 120 transitions. [2024-06-20 17:46:50,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 286 transitions, 3649 flow [2024-06-20 17:46:50,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 286 transitions, 3447 flow, removed 59 selfloop flow, removed 9 redundant places. [2024-06-20 17:46:50,895 INFO L231 Difference]: Finished difference. Result has 230 places, 274 transitions, 2949 flow [2024-06-20 17:46:50,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2859, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2949, PETRI_PLACES=230, PETRI_TRANSITIONS=274} [2024-06-20 17:46:50,895 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 189 predicate places. [2024-06-20 17:46:50,895 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 274 transitions, 2949 flow [2024-06-20 17:46:50,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.666666666666666) internal successors, (141), 9 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:50,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:46:50,896 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:46:50,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-20 17:46:50,896 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:46:50,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:46:50,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1117732571, now seen corresponding path program 6 times [2024-06-20 17:46:50,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:46:50,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675836645] [2024-06-20 17:46:50,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:46:50,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:46:50,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:46:51,266 INFO 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 17:46:51,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:46:51,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675836645] [2024-06-20 17:46:51,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675836645] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:46:51,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:46:51,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:46:51,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546831668] [2024-06-20 17:46:51,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:46:51,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:46:51,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:46:51,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:46:51,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:46:51,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:46:51,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 274 transitions, 2949 flow. Second operand has 9 states, 9 states have (on average 15.666666666666666) internal successors, (141), 9 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:51,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:46:51,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:46:51,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:46:51,707 INFO L124 PetriNetUnfolderBase]: 1579/2663 cut-off events. [2024-06-20 17:46:51,707 INFO L125 PetriNetUnfolderBase]: For 100122/100124 co-relation queries the response was YES. [2024-06-20 17:46:51,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16469 conditions, 2663 events. 1579/2663 cut-off events. For 100122/100124 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 15544 event pairs, 333 based on Foata normal form. 3/2665 useless extension candidates. Maximal degree in co-relation 16365. Up to 2302 conditions per place. [2024-06-20 17:46:51,732 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 230 selfloop transitions, 69 changer transitions 0/306 dead transitions. [2024-06-20 17:46:51,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 306 transitions, 3916 flow [2024-06-20 17:46:51,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:46:51,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:46:51,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 222 transitions. [2024-06-20 17:46:51,733 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.555 [2024-06-20 17:46:51,733 INFO L175 Difference]: Start difference. First operand has 230 places, 274 transitions, 2949 flow. Second operand 10 states and 222 transitions. [2024-06-20 17:46:51,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 306 transitions, 3916 flow [2024-06-20 17:46:51,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 306 transitions, 3818 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-20 17:46:51,928 INFO L231 Difference]: Finished difference. Result has 235 places, 280 transitions, 3103 flow [2024-06-20 17:46:51,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2855, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3103, PETRI_PLACES=235, PETRI_TRANSITIONS=280} [2024-06-20 17:46:51,929 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 194 predicate places. [2024-06-20 17:46:51,929 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 280 transitions, 3103 flow [2024-06-20 17:46:51,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.666666666666666) internal successors, (141), 9 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:51,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:46:51,929 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:46:51,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-20 17:46:51,929 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:46:51,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:46:51,930 INFO L85 PathProgramCache]: Analyzing trace with hash 1112370191, now seen corresponding path program 7 times [2024-06-20 17:46:51,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:46:51,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756325234] [2024-06-20 17:46:51,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:46:51,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:46:51,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:46:52,339 INFO 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 17:46:52,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:46:52,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756325234] [2024-06-20 17:46:52,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756325234] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:46:52,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:46:52,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:46:52,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020215586] [2024-06-20 17:46:52,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:46:52,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:46:52,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:46:52,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:46:52,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:46:52,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:46:52,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 280 transitions, 3103 flow. Second operand has 9 states, 9 states have (on average 15.666666666666666) internal successors, (141), 9 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:52,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:46:52,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:46:52,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:46:52,819 INFO L124 PetriNetUnfolderBase]: 1576/2659 cut-off events. [2024-06-20 17:46:52,819 INFO L125 PetriNetUnfolderBase]: For 98996/98998 co-relation queries the response was YES. [2024-06-20 17:46:52,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16456 conditions, 2659 events. 1576/2659 cut-off events. For 98996/98998 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 15504 event pairs, 335 based on Foata normal form. 3/2661 useless extension candidates. Maximal degree in co-relation 16352. Up to 2299 conditions per place. [2024-06-20 17:46:52,843 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 230 selfloop transitions, 65 changer transitions 0/302 dead transitions. [2024-06-20 17:46:52,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 302 transitions, 3850 flow [2024-06-20 17:46:52,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:46:52,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:46:52,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-20 17:46:52,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5964285714285714 [2024-06-20 17:46:52,844 INFO L175 Difference]: Start difference. First operand has 235 places, 280 transitions, 3103 flow. Second operand 7 states and 167 transitions. [2024-06-20 17:46:52,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 302 transitions, 3850 flow [2024-06-20 17:46:53,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 302 transitions, 3658 flow, removed 42 selfloop flow, removed 6 redundant places. [2024-06-20 17:46:53,039 INFO L231 Difference]: Finished difference. Result has 236 places, 280 transitions, 3047 flow [2024-06-20 17:46:53,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2911, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3047, PETRI_PLACES=236, PETRI_TRANSITIONS=280} [2024-06-20 17:46:53,040 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 195 predicate places. [2024-06-20 17:46:53,040 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 280 transitions, 3047 flow [2024-06-20 17:46:53,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.666666666666666) internal successors, (141), 9 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:53,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:46:53,041 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 17:46:53,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-20 17:46:53,041 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:46:53,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:46:53,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1117495235, now seen corresponding path program 10 times [2024-06-20 17:46:53,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:46:53,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110377700] [2024-06-20 17:46:53,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:46:53,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:46:53,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:46:53,415 INFO 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 17:46:53,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:46:53,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110377700] [2024-06-20 17:46:53,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110377700] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:46:53,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:46:53,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:46:53,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093088027] [2024-06-20 17:46:53,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:46:53,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:46:53,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:46:53,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:46:53,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:46:53,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:46:53,457 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 280 transitions, 3047 flow. Second operand has 9 states, 9 states have (on average 15.666666666666666) internal successors, (141), 9 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:53,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:46:53,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:46:53,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:46:53,879 INFO L124 PetriNetUnfolderBase]: 1643/2771 cut-off events. [2024-06-20 17:46:53,879 INFO L125 PetriNetUnfolderBase]: For 102852/102854 co-relation queries the response was YES. [2024-06-20 17:46:53,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17178 conditions, 2771 events. 1643/2771 cut-off events. For 102852/102854 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 16277 event pairs, 333 based on Foata normal form. 3/2773 useless extension candidates. Maximal degree in co-relation 17073. Up to 2406 conditions per place. [2024-06-20 17:46:53,908 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 258 selfloop transitions, 67 changer transitions 0/332 dead transitions. [2024-06-20 17:46:53,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 332 transitions, 4154 flow [2024-06-20 17:46:53,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:46:53,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:46:53,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 181 transitions. [2024-06-20 17:46:53,910 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.565625 [2024-06-20 17:46:53,910 INFO L175 Difference]: Start difference. First operand has 236 places, 280 transitions, 3047 flow. Second operand 8 states and 181 transitions. [2024-06-20 17:46:53,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 332 transitions, 4154 flow [2024-06-20 17:46:54,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 332 transitions, 3988 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-20 17:46:54,101 INFO L231 Difference]: Finished difference. Result has 241 places, 308 transitions, 3481 flow [2024-06-20 17:46:54,101 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2901, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3481, PETRI_PLACES=241, PETRI_TRANSITIONS=308} [2024-06-20 17:46:54,101 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 200 predicate places. [2024-06-20 17:46:54,101 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 308 transitions, 3481 flow [2024-06-20 17:46:54,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.666666666666666) internal successors, (141), 9 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:54,101 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:46:54,102 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 17:46:54,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-20 17:46:54,102 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:46:54,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:46:54,102 INFO L85 PathProgramCache]: Analyzing trace with hash 1117495421, now seen corresponding path program 8 times [2024-06-20 17:46:54,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:46:54,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831784201] [2024-06-20 17:46:54,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:46:54,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:46:54,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:46:54,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:46:54,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:46:54,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831784201] [2024-06-20 17:46:54,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831784201] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:46:54,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:46:54,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:46:54,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091233072] [2024-06-20 17:46:54,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:46:54,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:46:54,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:46:54,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:46:54,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:46:54,565 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:46:54,565 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 308 transitions, 3481 flow. Second operand has 9 states, 9 states have (on average 15.666666666666666) internal successors, (141), 9 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:54,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:46:54,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:46:54,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:46:54,987 INFO L124 PetriNetUnfolderBase]: 1640/2761 cut-off events. [2024-06-20 17:46:54,987 INFO L125 PetriNetUnfolderBase]: For 105759/105761 co-relation queries the response was YES. [2024-06-20 17:46:55,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17529 conditions, 2761 events. 1640/2761 cut-off events. For 105759/105761 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 16145 event pairs, 331 based on Foata normal form. 3/2763 useless extension candidates. Maximal degree in co-relation 17420. Up to 2369 conditions per place. [2024-06-20 17:46:55,017 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 248 selfloop transitions, 78 changer transitions 0/333 dead transitions. [2024-06-20 17:46:55,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 333 transitions, 4196 flow [2024-06-20 17:46:55,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 17:46:55,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 17:46:55,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 238 transitions. [2024-06-20 17:46:55,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5409090909090909 [2024-06-20 17:46:55,018 INFO L175 Difference]: Start difference. First operand has 241 places, 308 transitions, 3481 flow. Second operand 11 states and 238 transitions. [2024-06-20 17:46:55,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 333 transitions, 4196 flow [2024-06-20 17:46:55,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 333 transitions, 4057 flow, removed 36 selfloop flow, removed 3 redundant places. [2024-06-20 17:46:55,223 INFO L231 Difference]: Finished difference. Result has 249 places, 308 transitions, 3505 flow [2024-06-20 17:46:55,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3342, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3505, PETRI_PLACES=249, PETRI_TRANSITIONS=308} [2024-06-20 17:46:55,224 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 208 predicate places. [2024-06-20 17:46:55,224 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 308 transitions, 3505 flow [2024-06-20 17:46:55,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.666666666666666) internal successors, (141), 9 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:55,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:46:55,224 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 17:46:55,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-20 17:46:55,224 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:46:55,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:46:55,225 INFO L85 PathProgramCache]: Analyzing trace with hash 553585411, now seen corresponding path program 11 times [2024-06-20 17:46:55,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:46:55,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142526921] [2024-06-20 17:46:55,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:46:55,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:46:55,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:46:55,552 INFO 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 17:46:55,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:46:55,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142526921] [2024-06-20 17:46:55,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142526921] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:46:55,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:46:55,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:46:55,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379052738] [2024-06-20 17:46:55,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:46:55,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:46:55,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:46:55,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:46:55,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:46:55,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:46:55,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 308 transitions, 3505 flow. Second operand has 9 states, 9 states have (on average 15.666666666666666) internal successors, (141), 9 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:55,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:46:55,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:46:55,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:46:56,036 INFO L124 PetriNetUnfolderBase]: 1645/2774 cut-off events. [2024-06-20 17:46:56,036 INFO L125 PetriNetUnfolderBase]: For 109485/109487 co-relation queries the response was YES. [2024-06-20 17:46:56,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17681 conditions, 2774 events. 1645/2774 cut-off events. For 109485/109487 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 16308 event pairs, 333 based on Foata normal form. 3/2776 useless extension candidates. Maximal degree in co-relation 17571. Up to 2320 conditions per place. [2024-06-20 17:46:56,062 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 210 selfloop transitions, 118 changer transitions 0/335 dead transitions. [2024-06-20 17:46:56,062 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 335 transitions, 4440 flow [2024-06-20 17:46:56,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:46:56,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:46:56,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 200 transitions. [2024-06-20 17:46:56,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2024-06-20 17:46:56,064 INFO L175 Difference]: Start difference. First operand has 249 places, 308 transitions, 3505 flow. Second operand 9 states and 200 transitions. [2024-06-20 17:46:56,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 335 transitions, 4440 flow [2024-06-20 17:46:56,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 335 transitions, 4205 flow, removed 11 selfloop flow, removed 11 redundant places. [2024-06-20 17:46:56,297 INFO L231 Difference]: Finished difference. Result has 247 places, 314 transitions, 3640 flow [2024-06-20 17:46:56,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3280, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3640, PETRI_PLACES=247, PETRI_TRANSITIONS=314} [2024-06-20 17:46:56,297 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 206 predicate places. [2024-06-20 17:46:56,297 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 314 transitions, 3640 flow [2024-06-20 17:46:56,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.666666666666666) internal successors, (141), 9 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:56,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:46:56,298 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 17:46:56,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-20 17:46:56,298 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:46:56,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:46:56,298 INFO L85 PathProgramCache]: Analyzing trace with hash 553705381, now seen corresponding path program 12 times [2024-06-20 17:46:56,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:46:56,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158466972] [2024-06-20 17:46:56,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:46:56,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:46:56,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:46:56,711 INFO 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 17:46:56,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:46:56,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158466972] [2024-06-20 17:46:56,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158466972] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:46:56,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:46:56,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:46:56,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401602188] [2024-06-20 17:46:56,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:46:56,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:46:56,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:46:56,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:46:56,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:46:56,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:46:56,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 314 transitions, 3640 flow. Second operand has 9 states, 9 states have (on average 15.666666666666666) internal successors, (141), 9 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:56,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:46:56,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:46:56,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:46:57,229 INFO L124 PetriNetUnfolderBase]: 1642/2770 cut-off events. [2024-06-20 17:46:57,229 INFO L125 PetriNetUnfolderBase]: For 109603/109605 co-relation queries the response was YES. [2024-06-20 17:46:57,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17547 conditions, 2770 events. 1642/2770 cut-off events. For 109603/109605 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 16272 event pairs, 333 based on Foata normal form. 3/2772 useless extension candidates. Maximal degree in co-relation 17437. Up to 2440 conditions per place. [2024-06-20 17:46:57,256 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 285 selfloop transitions, 42 changer transitions 0/334 dead transitions. [2024-06-20 17:46:57,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 334 transitions, 4345 flow [2024-06-20 17:46:57,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:46:57,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:46:57,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 196 transitions. [2024-06-20 17:46:57,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5444444444444444 [2024-06-20 17:46:57,257 INFO L175 Difference]: Start difference. First operand has 247 places, 314 transitions, 3640 flow. Second operand 9 states and 196 transitions. [2024-06-20 17:46:57,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 334 transitions, 4345 flow [2024-06-20 17:46:57,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 334 transitions, 4039 flow, removed 50 selfloop flow, removed 6 redundant places. [2024-06-20 17:46:57,477 INFO L231 Difference]: Finished difference. Result has 250 places, 314 transitions, 3424 flow [2024-06-20 17:46:57,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3334, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3424, PETRI_PLACES=250, PETRI_TRANSITIONS=314} [2024-06-20 17:46:57,478 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 209 predicate places. [2024-06-20 17:46:57,478 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 314 transitions, 3424 flow [2024-06-20 17:46:57,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.666666666666666) internal successors, (141), 9 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:57,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:46:57,478 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 17:46:57,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-20 17:46:57,479 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:46:57,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:46:57,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1127714635, now seen corresponding path program 7 times [2024-06-20 17:46:57,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:46:57,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572446831] [2024-06-20 17:46:57,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:46:57,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:46:57,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:46:57,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:46:57,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:46:57,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572446831] [2024-06-20 17:46:57,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572446831] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:46:57,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:46:57,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:46:57,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265844111] [2024-06-20 17:46:57,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:46:57,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:46:57,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:46:57,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:46:57,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:46:57,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:46:57,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 314 transitions, 3424 flow. Second operand has 9 states, 9 states have (on average 15.666666666666666) internal successors, (141), 9 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:57,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:46:57,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:46:57,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:46:58,336 INFO L124 PetriNetUnfolderBase]: 1657/2794 cut-off events. [2024-06-20 17:46:58,336 INFO L125 PetriNetUnfolderBase]: For 118197/118197 co-relation queries the response was YES. [2024-06-20 17:46:58,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17210 conditions, 2794 events. 1657/2794 cut-off events. For 118197/118197 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 16403 event pairs, 329 based on Foata normal form. 8/2801 useless extension candidates. Maximal degree in co-relation 17099. Up to 2464 conditions per place. [2024-06-20 17:46:58,364 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 298 selfloop transitions, 35 changer transitions 0/340 dead transitions. [2024-06-20 17:46:58,364 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 340 transitions, 4194 flow [2024-06-20 17:46:58,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:46:58,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:46:58,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 195 transitions. [2024-06-20 17:46:58,365 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-06-20 17:46:58,366 INFO L175 Difference]: Start difference. First operand has 250 places, 314 transitions, 3424 flow. Second operand 9 states and 195 transitions. [2024-06-20 17:46:58,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 340 transitions, 4194 flow [2024-06-20 17:46:58,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 340 transitions, 4076 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-20 17:46:58,608 INFO L231 Difference]: Finished difference. Result has 250 places, 315 transitions, 3395 flow [2024-06-20 17:46:58,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3306, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3395, PETRI_PLACES=250, PETRI_TRANSITIONS=315} [2024-06-20 17:46:58,608 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 209 predicate places. [2024-06-20 17:46:58,608 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 315 transitions, 3395 flow [2024-06-20 17:46:58,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.666666666666666) internal successors, (141), 9 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:58,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:46:58,609 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:46:58,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-20 17:46:58,609 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:46:58,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:46:58,609 INFO L85 PathProgramCache]: Analyzing trace with hash -1127314921, now seen corresponding path program 2 times [2024-06-20 17:46:58,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:46:58,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626923657] [2024-06-20 17:46:58,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:46:58,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:46:58,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:46:58,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:46:58,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:46:58,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626923657] [2024-06-20 17:46:58,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626923657] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:46:58,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:46:58,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:46:58,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209035630] [2024-06-20 17:46:58,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:46:58,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:46:58,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:46:58,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:46:58,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:46:59,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:46:59,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 315 transitions, 3395 flow. Second operand has 9 states, 9 states have (on average 15.666666666666666) internal successors, (141), 9 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:59,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:46:59,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:46:59,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:46:59,487 INFO L124 PetriNetUnfolderBase]: 1677/2830 cut-off events. [2024-06-20 17:46:59,488 INFO L125 PetriNetUnfolderBase]: For 119655/119655 co-relation queries the response was YES. [2024-06-20 17:46:59,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17442 conditions, 2830 events. 1677/2830 cut-off events. For 119655/119655 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 16684 event pairs, 329 based on Foata normal form. 6/2835 useless extension candidates. Maximal degree in co-relation 17331. Up to 2466 conditions per place. [2024-06-20 17:46:59,517 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 302 selfloop transitions, 37 changer transitions 0/346 dead transitions. [2024-06-20 17:46:59,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 346 transitions, 4217 flow [2024-06-20 17:46:59,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:46:59,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:46:59,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 198 transitions. [2024-06-20 17:46:59,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-06-20 17:46:59,519 INFO L175 Difference]: Start difference. First operand has 250 places, 315 transitions, 3395 flow. Second operand 9 states and 198 transitions. [2024-06-20 17:46:59,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 346 transitions, 4217 flow [2024-06-20 17:46:59,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 346 transitions, 4142 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-20 17:46:59,750 INFO L231 Difference]: Finished difference. Result has 253 places, 318 transitions, 3440 flow [2024-06-20 17:46:59,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3320, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3440, PETRI_PLACES=253, PETRI_TRANSITIONS=318} [2024-06-20 17:46:59,752 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 212 predicate places. [2024-06-20 17:46:59,752 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 318 transitions, 3440 flow [2024-06-20 17:46:59,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.666666666666666) internal successors, (141), 9 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:46:59,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:46:59,752 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 17:46:59,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-20 17:46:59,753 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:46:59,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:46:59,753 INFO L85 PathProgramCache]: Analyzing trace with hash 996810949, now seen corresponding path program 3 times [2024-06-20 17:46:59,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:46:59,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236348058] [2024-06-20 17:46:59,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:46:59,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:46:59,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:47:00,128 INFO 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 17:47:00,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:47:00,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236348058] [2024-06-20 17:47:00,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236348058] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:47:00,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:47:00,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:47:00,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655159672] [2024-06-20 17:47:00,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:47:00,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:47:00,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:47:00,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:47:00,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:47:00,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:47:00,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 318 transitions, 3440 flow. Second operand has 9 states, 9 states have (on average 15.666666666666666) internal successors, (141), 9 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:47:00,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:47:00,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:47:00,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:47:00,677 INFO L124 PetriNetUnfolderBase]: 1664/2811 cut-off events. [2024-06-20 17:47:00,678 INFO L125 PetriNetUnfolderBase]: For 114186/114186 co-relation queries the response was YES. [2024-06-20 17:47:00,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17099 conditions, 2811 events. 1664/2811 cut-off events. For 114186/114186 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 16526 event pairs, 320 based on Foata normal form. 6/2816 useless extension candidates. Maximal degree in co-relation 16986. Up to 2283 conditions per place. [2024-06-20 17:47:00,709 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 297 selfloop transitions, 45 changer transitions 0/349 dead transitions. [2024-06-20 17:47:00,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 349 transitions, 4258 flow [2024-06-20 17:47:00,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:47:00,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:47:00,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 198 transitions. [2024-06-20 17:47:00,711 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-06-20 17:47:00,711 INFO L175 Difference]: Start difference. First operand has 253 places, 318 transitions, 3440 flow. Second operand 9 states and 198 transitions. [2024-06-20 17:47:00,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 349 transitions, 4258 flow [2024-06-20 17:47:00,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 349 transitions, 4170 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-20 17:47:00,948 INFO L231 Difference]: Finished difference. Result has 257 places, 320 transitions, 3471 flow [2024-06-20 17:47:00,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3354, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3471, PETRI_PLACES=257, PETRI_TRANSITIONS=320} [2024-06-20 17:47:00,949 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 216 predicate places. [2024-06-20 17:47:00,949 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 320 transitions, 3471 flow [2024-06-20 17:47:00,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.666666666666666) internal successors, (141), 9 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:47:00,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:47:00,950 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 17:47:00,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-20 17:47:00,950 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:47:00,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:47:00,950 INFO L85 PathProgramCache]: Analyzing trace with hash -1552444783, now seen corresponding path program 1 times [2024-06-20 17:47:00,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:47:00,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745400083] [2024-06-20 17:47:00,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:47:00,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:47:00,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:47:01,335 INFO 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 17:47:01,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:47:01,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745400083] [2024-06-20 17:47:01,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745400083] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:47:01,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:47:01,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:47:01,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702461004] [2024-06-20 17:47:01,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:47:01,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:47:01,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:47:01,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:47:01,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:47:01,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:47:01,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 320 transitions, 3471 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:47:01,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:47:01,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:47:01,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:47:01,867 INFO L124 PetriNetUnfolderBase]: 1717/2894 cut-off events. [2024-06-20 17:47:01,867 INFO L125 PetriNetUnfolderBase]: For 127659/127661 co-relation queries the response was YES. [2024-06-20 17:47:01,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17848 conditions, 2894 events. 1717/2894 cut-off events. For 127659/127661 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 17095 event pairs, 346 based on Foata normal form. 8/2901 useless extension candidates. Maximal degree in co-relation 17733. Up to 2480 conditions per place. [2024-06-20 17:47:01,898 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 318 selfloop transitions, 29 changer transitions 0/354 dead transitions. [2024-06-20 17:47:01,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 354 transitions, 4425 flow [2024-06-20 17:47:01,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:47:01,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:47:01,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-20 17:47:01,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5857142857142857 [2024-06-20 17:47:01,899 INFO L175 Difference]: Start difference. First operand has 257 places, 320 transitions, 3471 flow. Second operand 7 states and 164 transitions. [2024-06-20 17:47:01,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 354 transitions, 4425 flow [2024-06-20 17:47:02,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 354 transitions, 4270 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-20 17:47:02,168 INFO L231 Difference]: Finished difference. Result has 258 places, 325 transitions, 3429 flow [2024-06-20 17:47:02,169 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3316, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3429, PETRI_PLACES=258, PETRI_TRANSITIONS=325} [2024-06-20 17:47:02,169 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 217 predicate places. [2024-06-20 17:47:02,169 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 325 transitions, 3429 flow [2024-06-20 17:47:02,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:47:02,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:47:02,169 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 17:47:02,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-20 17:47:02,170 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:47:02,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:47:02,170 INFO L85 PathProgramCache]: Analyzing trace with hash -568477521, now seen corresponding path program 2 times [2024-06-20 17:47:02,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:47:02,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197997106] [2024-06-20 17:47:02,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:47:02,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:47:02,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:47:02,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:47:02,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:47:02,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197997106] [2024-06-20 17:47:02,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197997106] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:47:02,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:47:02,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:47:02,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810014975] [2024-06-20 17:47:02,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:47:02,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:47:02,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:47:02,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:47:02,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:47:02,608 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:47:02,609 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 325 transitions, 3429 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:47:02,609 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:47:02,609 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:47:02,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:47:03,061 INFO L124 PetriNetUnfolderBase]: 1745/2947 cut-off events. [2024-06-20 17:47:03,062 INFO L125 PetriNetUnfolderBase]: For 134883/134885 co-relation queries the response was YES. [2024-06-20 17:47:03,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17848 conditions, 2947 events. 1745/2947 cut-off events. For 134883/134885 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 17496 event pairs, 360 based on Foata normal form. 10/2956 useless extension candidates. Maximal degree in co-relation 17732. Up to 2620 conditions per place. [2024-06-20 17:47:03,094 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 311 selfloop transitions, 27 changer transitions 0/345 dead transitions. [2024-06-20 17:47:03,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 345 transitions, 4187 flow [2024-06-20 17:47:03,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:47:03,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:47:03,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 157 transitions. [2024-06-20 17:47:03,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5607142857142857 [2024-06-20 17:47:03,095 INFO L175 Difference]: Start difference. First operand has 258 places, 325 transitions, 3429 flow. Second operand 7 states and 157 transitions. [2024-06-20 17:47:03,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 345 transitions, 4187 flow [2024-06-20 17:47:03,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 345 transitions, 4154 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-20 17:47:03,498 INFO L231 Difference]: Finished difference. Result has 263 places, 326 transitions, 3466 flow [2024-06-20 17:47:03,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3396, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3466, PETRI_PLACES=263, PETRI_TRANSITIONS=326} [2024-06-20 17:47:03,499 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 222 predicate places. [2024-06-20 17:47:03,499 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 326 transitions, 3466 flow [2024-06-20 17:47:03,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:47:03,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:47:03,499 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:47:03,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-20 17:47:03,500 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:47:03,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:47:03,500 INFO L85 PathProgramCache]: Analyzing trace with hash -568625391, now seen corresponding path program 3 times [2024-06-20 17:47:03,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:47:03,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995867159] [2024-06-20 17:47:03,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:47:03,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:47:03,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:47:03,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:47:03,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:47:03,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995867159] [2024-06-20 17:47:03,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995867159] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:47:03,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:47:03,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:47:03,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327234873] [2024-06-20 17:47:03,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:47:03,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:47:03,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:47:03,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:47:03,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:47:03,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:47:03,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 326 transitions, 3466 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:47:03,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:47:03,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:47:03,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:47:04,367 INFO L124 PetriNetUnfolderBase]: 1765/2979 cut-off events. [2024-06-20 17:47:04,367 INFO L125 PetriNetUnfolderBase]: For 136020/136022 co-relation queries the response was YES. [2024-06-20 17:47:04,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18186 conditions, 2979 events. 1765/2979 cut-off events. For 136020/136022 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 17735 event pairs, 358 based on Foata normal form. 8/2986 useless extension candidates. Maximal degree in co-relation 18068. Up to 2622 conditions per place. [2024-06-20 17:47:04,402 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 315 selfloop transitions, 29 changer transitions 0/351 dead transitions. [2024-06-20 17:47:04,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 351 transitions, 4274 flow [2024-06-20 17:47:04,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:47:04,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:47:04,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 160 transitions. [2024-06-20 17:47:04,403 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-20 17:47:04,403 INFO L175 Difference]: Start difference. First operand has 263 places, 326 transitions, 3466 flow. Second operand 7 states and 160 transitions. [2024-06-20 17:47:04,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 351 transitions, 4274 flow [2024-06-20 17:47:04,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 351 transitions, 4221 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-20 17:47:04,715 INFO L231 Difference]: Finished difference. Result has 266 places, 329 transitions, 3512 flow [2024-06-20 17:47:04,715 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3413, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3512, PETRI_PLACES=266, PETRI_TRANSITIONS=329} [2024-06-20 17:47:04,715 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 225 predicate places. [2024-06-20 17:47:04,715 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 329 transitions, 3512 flow [2024-06-20 17:47:04,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:47:04,716 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:47:04,716 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 17:47:04,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-20 17:47:04,716 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:47:04,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:47:04,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1117741499, now seen corresponding path program 4 times [2024-06-20 17:47:04,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:47:04,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999520928] [2024-06-20 17:47:04,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:47:04,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:47:04,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:47:05,090 INFO 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 17:47:05,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:47:05,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999520928] [2024-06-20 17:47:05,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999520928] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:47:05,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:47:05,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:47:05,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819453565] [2024-06-20 17:47:05,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:47:05,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:47:05,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:47:05,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:47:05,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:47:05,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:47:05,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 329 transitions, 3512 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:47:05,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:47:05,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:47:05,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:47:05,620 INFO L124 PetriNetUnfolderBase]: 1793/3023 cut-off events. [2024-06-20 17:47:05,620 INFO L125 PetriNetUnfolderBase]: For 144618/144620 co-relation queries the response was YES. [2024-06-20 17:47:05,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18573 conditions, 3023 events. 1793/3023 cut-off events. For 144618/144620 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 18050 event pairs, 366 based on Foata normal form. 10/3032 useless extension candidates. Maximal degree in co-relation 18453. Up to 2702 conditions per place. [2024-06-20 17:47:05,653 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 319 selfloop transitions, 24 changer transitions 0/350 dead transitions. [2024-06-20 17:47:05,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 350 transitions, 4286 flow [2024-06-20 17:47:05,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:47:05,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:47:05,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 174 transitions. [2024-06-20 17:47:05,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.54375 [2024-06-20 17:47:05,655 INFO L175 Difference]: Start difference. First operand has 266 places, 329 transitions, 3512 flow. Second operand 8 states and 174 transitions. [2024-06-20 17:47:05,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 350 transitions, 4286 flow [2024-06-20 17:47:05,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 350 transitions, 4251 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-20 17:47:05,946 INFO L231 Difference]: Finished difference. Result has 271 places, 330 transitions, 3545 flow [2024-06-20 17:47:05,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3477, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3545, PETRI_PLACES=271, PETRI_TRANSITIONS=330} [2024-06-20 17:47:05,947 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 230 predicate places. [2024-06-20 17:47:05,947 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 330 transitions, 3545 flow [2024-06-20 17:47:05,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:47:05,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:47:05,947 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 17:47:05,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-20 17:47:05,947 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:47:05,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:47:05,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1112379119, now seen corresponding path program 5 times [2024-06-20 17:47:05,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:47:05,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107417754] [2024-06-20 17:47:05,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:47:05,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:47:05,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:47:06,321 INFO 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 17:47:06,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:47:06,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107417754] [2024-06-20 17:47:06,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107417754] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:47:06,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:47:06,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:47:06,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517588233] [2024-06-20 17:47:06,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:47:06,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:47:06,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:47:06,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:47:06,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:47:06,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:47:06,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 330 transitions, 3545 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:47:06,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:47:06,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:47:06,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:47:06,867 INFO L124 PetriNetUnfolderBase]: 1808/3052 cut-off events. [2024-06-20 17:47:06,868 INFO L125 PetriNetUnfolderBase]: For 145244/145246 co-relation queries the response was YES. [2024-06-20 17:47:06,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18757 conditions, 3052 events. 1808/3052 cut-off events. For 145244/145246 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 18233 event pairs, 373 based on Foata normal form. 10/3061 useless extension candidates. Maximal degree in co-relation 18635. Up to 2727 conditions per place. [2024-06-20 17:47:06,902 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 320 selfloop transitions, 22 changer transitions 0/349 dead transitions. [2024-06-20 17:47:06,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 349 transitions, 4315 flow [2024-06-20 17:47:06,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:47:06,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:47:06,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 139 transitions. [2024-06-20 17:47:06,903 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5791666666666667 [2024-06-20 17:47:06,904 INFO L175 Difference]: Start difference. First operand has 271 places, 330 transitions, 3545 flow. Second operand 6 states and 139 transitions. [2024-06-20 17:47:06,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 349 transitions, 4315 flow [2024-06-20 17:47:07,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 349 transitions, 4264 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-20 17:47:07,230 INFO L231 Difference]: Finished difference. Result has 271 places, 331 transitions, 3560 flow [2024-06-20 17:47:07,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3494, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3560, PETRI_PLACES=271, PETRI_TRANSITIONS=331} [2024-06-20 17:47:07,231 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 230 predicate places. [2024-06-20 17:47:07,231 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 331 transitions, 3560 flow [2024-06-20 17:47:07,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:47:07,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:47:07,231 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 17:47:07,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-20 17:47:07,232 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:47:07,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:47:07,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1112231249, now seen corresponding path program 6 times [2024-06-20 17:47:07,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:47:07,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711966400] [2024-06-20 17:47:07,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:47:07,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:47:07,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:47:07,609 INFO 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 17:47:07,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:47:07,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711966400] [2024-06-20 17:47:07,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711966400] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:47:07,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:47:07,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:47:07,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876257566] [2024-06-20 17:47:07,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:47:07,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:47:07,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:47:07,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:47:07,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:47:07,679 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:47:07,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 331 transitions, 3560 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:47:07,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:47:07,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:47:07,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:47:08,169 INFO L124 PetriNetUnfolderBase]: 1795/3028 cut-off events. [2024-06-20 17:47:08,169 INFO L125 PetriNetUnfolderBase]: For 134231/134233 co-relation queries the response was YES. [2024-06-20 17:47:08,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18344 conditions, 3028 events. 1795/3028 cut-off events. For 134231/134233 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 18096 event pairs, 352 based on Foata normal form. 8/3035 useless extension candidates. Maximal degree in co-relation 18221. Up to 2628 conditions per place. [2024-06-20 17:47:08,211 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 324 selfloop transitions, 26 changer transitions 0/357 dead transitions. [2024-06-20 17:47:08,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 357 transitions, 4381 flow [2024-06-20 17:47:08,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:47:08,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:47:08,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-20 17:47:08,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6041666666666666 [2024-06-20 17:47:08,212 INFO L175 Difference]: Start difference. First operand has 271 places, 331 transitions, 3560 flow. Second operand 6 states and 145 transitions. [2024-06-20 17:47:08,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 357 transitions, 4381 flow [2024-06-20 17:47:08,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 357 transitions, 4328 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-20 17:47:08,543 INFO L231 Difference]: Finished difference. Result has 274 places, 333 transitions, 3598 flow [2024-06-20 17:47:08,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3509, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3598, PETRI_PLACES=274, PETRI_TRANSITIONS=333} [2024-06-20 17:47:08,544 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 233 predicate places. [2024-06-20 17:47:08,544 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 333 transitions, 3598 flow [2024-06-20 17:47:08,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:47:08,544 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:47:08,544 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 17:47:08,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-20 17:47:08,544 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:47:08,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:47:08,545 INFO L85 PathProgramCache]: Analyzing trace with hash 1117956701, now seen corresponding path program 1 times [2024-06-20 17:47:08,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:47:08,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703015323] [2024-06-20 17:47:08,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:47:08,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:47:08,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:47:08,916 INFO 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 17:47:08,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:47:08,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703015323] [2024-06-20 17:47:08,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703015323] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:47:08,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:47:08,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 17:47:08,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000201181] [2024-06-20 17:47:08,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:47:08,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 17:47:08,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:47:08,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 17:47:08,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 17:47:08,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:47:08,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 333 transitions, 3598 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:47:08,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:47:08,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:47:08,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:47:09,460 INFO L124 PetriNetUnfolderBase]: 1782/3006 cut-off events. [2024-06-20 17:47:09,460 INFO L125 PetriNetUnfolderBase]: For 126223/126225 co-relation queries the response was YES. [2024-06-20 17:47:09,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17986 conditions, 3006 events. 1782/3006 cut-off events. For 126223/126225 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 17938 event pairs, 341 based on Foata normal form. 8/3013 useless extension candidates. Maximal degree in co-relation 17861. Up to 2617 conditions per place. [2024-06-20 17:47:09,493 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 321 selfloop transitions, 29 changer transitions 0/357 dead transitions. [2024-06-20 17:47:09,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 357 transitions, 4399 flow [2024-06-20 17:47:09,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:47:09,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:47:09,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 177 transitions. [2024-06-20 17:47:09,495 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.553125 [2024-06-20 17:47:09,495 INFO L175 Difference]: Start difference. First operand has 274 places, 333 transitions, 3598 flow. Second operand 8 states and 177 transitions. [2024-06-20 17:47:09,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 357 transitions, 4399 flow [2024-06-20 17:47:09,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 357 transitions, 4310 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-20 17:47:09,917 INFO L231 Difference]: Finished difference. Result has 277 places, 333 transitions, 3571 flow [2024-06-20 17:47:09,918 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3509, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3571, PETRI_PLACES=277, PETRI_TRANSITIONS=333} [2024-06-20 17:47:09,918 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 236 predicate places. [2024-06-20 17:47:09,918 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 333 transitions, 3571 flow [2024-06-20 17:47:09,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:47:09,919 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:47:09,919 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:47:09,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-20 17:47:09,919 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:47:09,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:47:09,919 INFO L85 PathProgramCache]: Analyzing trace with hash -2066324371, now seen corresponding path program 1 times [2024-06-20 17:47:09,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:47:09,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394041958] [2024-06-20 17:47:09,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:47:09,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:47:09,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:47:10,278 INFO 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 17:47:10,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:47:10,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394041958] [2024-06-20 17:47:10,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394041958] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:47:10,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:47:10,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:47:10,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009511856] [2024-06-20 17:47:10,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:47:10,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:47:10,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:47:10,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:47:10,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:47:10,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:47:10,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 333 transitions, 3571 flow. Second operand has 10 states, 10 states have (on average 15.6) internal successors, (156), 10 states have internal predecessors, (156), 0 states have call successors, (0), 0 states 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 17:47:10,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:47:10,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:47:10,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:47:10,883 INFO L124 PetriNetUnfolderBase]: 1803/3044 cut-off events. [2024-06-20 17:47:10,883 INFO L125 PetriNetUnfolderBase]: For 124245/124253 co-relation queries the response was YES. [2024-06-20 17:47:10,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18235 conditions, 3044 events. 1803/3044 cut-off events. For 124245/124253 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 18238 event pairs, 397 based on Foata normal form. 9/3051 useless extension candidates. Maximal degree in co-relation 18110. Up to 2389 conditions per place. [2024-06-20 17:47:10,920 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 193 selfloop transitions, 172 changer transitions 0/372 dead transitions. [2024-06-20 17:47:10,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 372 transitions, 4767 flow [2024-06-20 17:47:10,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 17:47:10,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 17:47:10,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 265 transitions. [2024-06-20 17:47:10,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5520833333333334 [2024-06-20 17:47:10,921 INFO L175 Difference]: Start difference. First operand has 277 places, 333 transitions, 3571 flow. Second operand 12 states and 265 transitions. [2024-06-20 17:47:10,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 372 transitions, 4767 flow [2024-06-20 17:47:11,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 372 transitions, 4686 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-20 17:47:11,257 INFO L231 Difference]: Finished difference. Result has 282 places, 342 transitions, 3984 flow [2024-06-20 17:47:11,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3490, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3984, PETRI_PLACES=282, PETRI_TRANSITIONS=342} [2024-06-20 17:47:11,257 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 241 predicate places. [2024-06-20 17:47:11,258 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 342 transitions, 3984 flow [2024-06-20 17:47:11,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.6) internal successors, (156), 10 states have internal predecessors, (156), 0 states have call successors, (0), 0 states 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 17:47:11,258 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:47:11,258 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:47:11,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-20 17:47:11,258 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:47:11,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:47:11,259 INFO L85 PathProgramCache]: Analyzing trace with hash 1972116713, now seen corresponding path program 2 times [2024-06-20 17:47:11,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:47:11,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335681168] [2024-06-20 17:47:11,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:47:11,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:47:11,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:47:11,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:47:11,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:47:11,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335681168] [2024-06-20 17:47:11,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335681168] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:47:11,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:47:11,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:47:11,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70868500] [2024-06-20 17:47:11,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:47:11,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:47:11,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:47:11,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:47:11,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:47:11,658 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:47:11,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 342 transitions, 3984 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:47:11,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:47:11,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:47:11,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:47:12,223 INFO L124 PetriNetUnfolderBase]: 1816/3067 cut-off events. [2024-06-20 17:47:12,223 INFO L125 PetriNetUnfolderBase]: For 132613/132623 co-relation queries the response was YES. [2024-06-20 17:47:12,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18958 conditions, 3067 events. 1816/3067 cut-off events. For 132613/132623 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 18464 event pairs, 380 based on Foata normal form. 11/3077 useless extension candidates. Maximal degree in co-relation 18833. Up to 2603 conditions per place. [2024-06-20 17:47:12,257 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 249 selfloop transitions, 118 changer transitions 0/374 dead transitions. [2024-06-20 17:47:12,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 374 transitions, 5014 flow [2024-06-20 17:47:12,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 17:47:12,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 17:47:12,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 257 transitions. [2024-06-20 17:47:12,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5354166666666667 [2024-06-20 17:47:12,259 INFO L175 Difference]: Start difference. First operand has 282 places, 342 transitions, 3984 flow. Second operand 12 states and 257 transitions. [2024-06-20 17:47:12,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 374 transitions, 5014 flow [2024-06-20 17:47:12,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 374 transitions, 4689 flow, removed 75 selfloop flow, removed 7 redundant places. [2024-06-20 17:47:12,603 INFO L231 Difference]: Finished difference. Result has 287 places, 348 transitions, 4013 flow [2024-06-20 17:47:12,603 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3717, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4013, PETRI_PLACES=287, PETRI_TRANSITIONS=348} [2024-06-20 17:47:12,603 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 246 predicate places. [2024-06-20 17:47:12,603 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 348 transitions, 4013 flow [2024-06-20 17:47:12,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:47:12,604 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:47:12,604 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:47:12,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-20 17:47:12,604 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:47:12,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:47:12,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1972122293, now seen corresponding path program 3 times [2024-06-20 17:47:12,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:47:12,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27280519] [2024-06-20 17:47:12,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:47:12,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:47:12,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:47:12,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:47:12,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:47:12,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27280519] [2024-06-20 17:47:12,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27280519] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:47:12,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:47:12,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:47:12,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525728477] [2024-06-20 17:47:12,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:47:12,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:47:12,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:47:12,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:47:12,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:47:12,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:47:12,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 348 transitions, 4013 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:47:12,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:47:12,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:47:12,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:47:13,555 INFO L124 PetriNetUnfolderBase]: 1813/3063 cut-off events. [2024-06-20 17:47:13,555 INFO L125 PetriNetUnfolderBase]: For 129732/129742 co-relation queries the response was YES. [2024-06-20 17:47:13,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18881 conditions, 3063 events. 1813/3063 cut-off events. For 129732/129742 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 18433 event pairs, 380 based on Foata normal form. 11/3073 useless extension candidates. Maximal degree in co-relation 18754. Up to 2600 conditions per place. [2024-06-20 17:47:13,613 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 249 selfloop transitions, 118 changer transitions 0/374 dead transitions. [2024-06-20 17:47:13,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 374 transitions, 4809 flow [2024-06-20 17:47:13,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-20 17:47:13,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-20 17:47:13,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 273 transitions. [2024-06-20 17:47:13,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.525 [2024-06-20 17:47:13,615 INFO L175 Difference]: Start difference. First operand has 287 places, 348 transitions, 4013 flow. Second operand 13 states and 273 transitions. [2024-06-20 17:47:13,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 374 transitions, 4809 flow [2024-06-20 17:47:14,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 374 transitions, 4649 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-20 17:47:14,135 INFO L231 Difference]: Finished difference. Result has 292 places, 348 transitions, 4095 flow [2024-06-20 17:47:14,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3853, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4095, PETRI_PLACES=292, PETRI_TRANSITIONS=348} [2024-06-20 17:47:14,136 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 251 predicate places. [2024-06-20 17:47:14,137 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 348 transitions, 4095 flow [2024-06-20 17:47:14,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:47:14,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:47:14,137 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:47:14,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-20 17:47:14,137 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:47:14,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:47:14,138 INFO L85 PathProgramCache]: Analyzing trace with hash -1126735179, now seen corresponding path program 4 times [2024-06-20 17:47:14,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:47:14,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459964184] [2024-06-20 17:47:14,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:47:14,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:47:14,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:47:14,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:47:14,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:47:14,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459964184] [2024-06-20 17:47:14,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459964184] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:47:14,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:47:14,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:47:14,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583224461] [2024-06-20 17:47:14,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:47:14,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:47:14,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:47:14,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:47:14,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:47:14,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:47:14,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 348 transitions, 4095 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:47:14,557 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:47:14,557 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:47:14,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:47:15,098 INFO L124 PetriNetUnfolderBase]: 1842/3111 cut-off events. [2024-06-20 17:47:15,099 INFO L125 PetriNetUnfolderBase]: For 139831/139841 co-relation queries the response was YES. [2024-06-20 17:47:15,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19552 conditions, 3111 events. 1842/3111 cut-off events. For 139831/139841 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 18741 event pairs, 380 based on Foata normal form. 11/3121 useless extension candidates. Maximal degree in co-relation 19423. Up to 2613 conditions per place. [2024-06-20 17:47:15,135 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 249 selfloop transitions, 132 changer transitions 0/388 dead transitions. [2024-06-20 17:47:15,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 388 transitions, 5439 flow [2024-06-20 17:47:15,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-20 17:47:15,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-20 17:47:15,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 312 transitions. [2024-06-20 17:47:15,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.52 [2024-06-20 17:47:15,136 INFO L175 Difference]: Start difference. First operand has 292 places, 348 transitions, 4095 flow. Second operand 15 states and 312 transitions. [2024-06-20 17:47:15,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 388 transitions, 5439 flow [2024-06-20 17:47:15,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 388 transitions, 5199 flow, removed 0 selfloop flow, removed 12 redundant places. [2024-06-20 17:47:15,569 INFO L231 Difference]: Finished difference. Result has 296 places, 360 transitions, 4278 flow [2024-06-20 17:47:15,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3855, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=4278, PETRI_PLACES=296, PETRI_TRANSITIONS=360} [2024-06-20 17:47:15,569 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 255 predicate places. [2024-06-20 17:47:15,569 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 360 transitions, 4278 flow [2024-06-20 17:47:15,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:47:15,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:47:15,570 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:47:15,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-20 17:47:15,570 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:47:15,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:47:15,570 INFO L85 PathProgramCache]: Analyzing trace with hash -1126740759, now seen corresponding path program 5 times [2024-06-20 17:47:15,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:47:15,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751068194] [2024-06-20 17:47:15,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:47:15,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:47:15,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:47:15,896 INFO 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 17:47:15,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:47:15,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751068194] [2024-06-20 17:47:15,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751068194] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:47:15,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:47:15,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:47:15,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066079927] [2024-06-20 17:47:15,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:47:15,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:47:15,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:47:15,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:47:15,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:47:15,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:47:15,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 360 transitions, 4278 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:47:15,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:47:15,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:47:15,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:47:16,594 INFO L124 PetriNetUnfolderBase]: 1839/3107 cut-off events. [2024-06-20 17:47:16,594 INFO L125 PetriNetUnfolderBase]: For 141512/141522 co-relation queries the response was YES. [2024-06-20 17:47:16,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19607 conditions, 3107 events. 1839/3107 cut-off events. For 141512/141522 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 18680 event pairs, 380 based on Foata normal form. 11/3117 useless extension candidates. Maximal degree in co-relation 19476. Up to 2610 conditions per place. [2024-06-20 17:47:16,624 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 246 selfloop transitions, 132 changer transitions 0/385 dead transitions. [2024-06-20 17:47:16,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 385 transitions, 5360 flow [2024-06-20 17:47:16,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-20 17:47:16,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-20 17:47:16,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 275 transitions. [2024-06-20 17:47:16,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5288461538461539 [2024-06-20 17:47:16,625 INFO L175 Difference]: Start difference. First operand has 296 places, 360 transitions, 4278 flow. Second operand 13 states and 275 transitions. [2024-06-20 17:47:16,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 385 transitions, 5360 flow [2024-06-20 17:47:17,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 385 transitions, 5084 flow, removed 28 selfloop flow, removed 10 redundant places. [2024-06-20 17:47:17,028 INFO L231 Difference]: Finished difference. Result has 299 places, 360 transitions, 4272 flow [2024-06-20 17:47:17,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4002, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4272, PETRI_PLACES=299, PETRI_TRANSITIONS=360} [2024-06-20 17:47:17,029 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 258 predicate places. [2024-06-20 17:47:17,029 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 360 transitions, 4272 flow [2024-06-20 17:47:17,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:47:17,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:47:17,029 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:47:17,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-20 17:47:17,029 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:47:17,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:47:17,030 INFO L85 PathProgramCache]: Analyzing trace with hash -1119383529, now seen corresponding path program 6 times [2024-06-20 17:47:17,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:47:17,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659429517] [2024-06-20 17:47:17,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:47:17,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:47:17,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:47:17,362 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 17:47:17,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:47:17,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659429517] [2024-06-20 17:47:17,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659429517] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:47:17,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:47:17,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:47:17,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081992026] [2024-06-20 17:47:17,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:47:17,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:47:17,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:47:17,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:47:17,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:47:17,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:47:17,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 360 transitions, 4272 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:47:17,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:47:17,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:47:17,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:47:17,955 INFO L124 PetriNetUnfolderBase]: 1836/3103 cut-off events. [2024-06-20 17:47:17,956 INFO L125 PetriNetUnfolderBase]: For 142857/142867 co-relation queries the response was YES. [2024-06-20 17:47:17,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19556 conditions, 3103 events. 1836/3103 cut-off events. For 142857/142867 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 18678 event pairs, 380 based on Foata normal form. 11/3113 useless extension candidates. Maximal degree in co-relation 19424. Up to 2607 conditions per place. [2024-06-20 17:47:17,991 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 243 selfloop transitions, 133 changer transitions 0/383 dead transitions. [2024-06-20 17:47:17,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 383 transitions, 5214 flow [2024-06-20 17:47:17,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 17:47:17,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 17:47:17,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 254 transitions. [2024-06-20 17:47:17,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5291666666666667 [2024-06-20 17:47:17,992 INFO L175 Difference]: Start difference. First operand has 299 places, 360 transitions, 4272 flow. Second operand 12 states and 254 transitions. [2024-06-20 17:47:17,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 383 transitions, 5214 flow [2024-06-20 17:47:18,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 383 transitions, 4938 flow, removed 6 selfloop flow, removed 12 redundant places. [2024-06-20 17:47:18,476 INFO L231 Difference]: Finished difference. Result has 299 places, 360 transitions, 4268 flow [2024-06-20 17:47:18,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3996, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4268, PETRI_PLACES=299, PETRI_TRANSITIONS=360} [2024-06-20 17:47:18,476 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 258 predicate places. [2024-06-20 17:47:18,476 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 360 transitions, 4268 flow [2024-06-20 17:47:18,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:47:18,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:47:18,477 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:47:18,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-20 17:47:18,477 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:47:18,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:47:18,477 INFO L85 PathProgramCache]: Analyzing trace with hash -234845407, now seen corresponding path program 7 times [2024-06-20 17:47:18,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:47:18,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527578094] [2024-06-20 17:47:18,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:47:18,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:47:18,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:47:18,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:47:18,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:47:18,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527578094] [2024-06-20 17:47:18,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527578094] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:47:18,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:47:18,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:47:18,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003952743] [2024-06-20 17:47:18,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:47:18,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:47:18,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:47:18,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:47:18,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:47:18,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:47:18,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 360 transitions, 4268 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:47:18,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:47:18,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:47:18,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:47:19,464 INFO L124 PetriNetUnfolderBase]: 1849/3125 cut-off events. [2024-06-20 17:47:19,464 INFO L125 PetriNetUnfolderBase]: For 149109/149119 co-relation queries the response was YES. [2024-06-20 17:47:19,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19796 conditions, 3125 events. 1849/3125 cut-off events. For 149109/149119 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 18866 event pairs, 380 based on Foata normal form. 11/3135 useless extension candidates. Maximal degree in co-relation 19663. Up to 2528 conditions per place. [2024-06-20 17:47:19,507 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 249 selfloop transitions, 142 changer transitions 0/398 dead transitions. [2024-06-20 17:47:19,508 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 398 transitions, 5480 flow [2024-06-20 17:47:19,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 17:47:19,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 17:47:19,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 251 transitions. [2024-06-20 17:47:19,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5704545454545454 [2024-06-20 17:47:19,509 INFO L175 Difference]: Start difference. First operand has 299 places, 360 transitions, 4268 flow. Second operand 11 states and 251 transitions. [2024-06-20 17:47:19,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 398 transitions, 5480 flow [2024-06-20 17:47:20,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 398 transitions, 5232 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-20 17:47:20,083 INFO L231 Difference]: Finished difference. Result has 300 places, 366 transitions, 4386 flow [2024-06-20 17:47:20,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4020, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4386, PETRI_PLACES=300, PETRI_TRANSITIONS=366} [2024-06-20 17:47:20,086 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 259 predicate places. [2024-06-20 17:47:20,086 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 366 transitions, 4386 flow [2024-06-20 17:47:20,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:47:20,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:47:20,086 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:47:20,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-20 17:47:20,086 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:47:20,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:47:20,087 INFO L85 PathProgramCache]: Analyzing trace with hash 733074749, now seen corresponding path program 8 times [2024-06-20 17:47:20,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:47:20,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135911995] [2024-06-20 17:47:20,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:47:20,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:47:20,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:47:20,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:47:20,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:47:20,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135911995] [2024-06-20 17:47:20,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135911995] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:47:20,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:47:20,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:47:20,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376008473] [2024-06-20 17:47:20,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:47:20,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:47:20,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:47:20,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:47:20,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:47:20,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:47:20,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 366 transitions, 4386 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:47:20,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:47:20,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:47:20,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:47:21,086 INFO L124 PetriNetUnfolderBase]: 1854/3133 cut-off events. [2024-06-20 17:47:21,086 INFO L125 PetriNetUnfolderBase]: For 153552/153560 co-relation queries the response was YES. [2024-06-20 17:47:21,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19969 conditions, 3133 events. 1854/3133 cut-off events. For 153552/153560 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 18910 event pairs, 397 based on Foata normal form. 9/3140 useless extension candidates. Maximal degree in co-relation 19835. Up to 2534 conditions per place. [2024-06-20 17:47:21,124 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 249 selfloop transitions, 136 changer transitions 0/392 dead transitions. [2024-06-20 17:47:21,125 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 392 transitions, 5536 flow [2024-06-20 17:47:21,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:47:21,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:47:21,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-20 17:47:21,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.590625 [2024-06-20 17:47:21,126 INFO L175 Difference]: Start difference. First operand has 300 places, 366 transitions, 4386 flow. Second operand 8 states and 189 transitions. [2024-06-20 17:47:21,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 392 transitions, 5536 flow [2024-06-20 17:47:21,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 392 transitions, 5242 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-20 17:47:21,682 INFO L231 Difference]: Finished difference. Result has 301 places, 369 transitions, 4414 flow [2024-06-20 17:47:21,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4103, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4414, PETRI_PLACES=301, PETRI_TRANSITIONS=369} [2024-06-20 17:47:21,683 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 260 predicate places. [2024-06-20 17:47:21,683 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 369 transitions, 4414 flow [2024-06-20 17:47:21,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:47:21,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:47:21,683 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:47:21,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-20 17:47:21,683 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:47:21,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:47:21,684 INFO L85 PathProgramCache]: Analyzing trace with hash -225579817, now seen corresponding path program 9 times [2024-06-20 17:47:21,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:47:21,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209502739] [2024-06-20 17:47:21,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:47:21,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:47:21,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:47:22,054 INFO 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 17:47:22,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:47:22,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209502739] [2024-06-20 17:47:22,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209502739] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:47:22,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:47:22,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:47:22,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389978569] [2024-06-20 17:47:22,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:47:22,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:47:22,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:47:22,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:47:22,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:47:22,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:47:22,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 369 transitions, 4414 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:47:22,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:47:22,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:47:22,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:47:22,777 INFO L124 PetriNetUnfolderBase]: 1867/3156 cut-off events. [2024-06-20 17:47:22,778 INFO L125 PetriNetUnfolderBase]: For 159826/159836 co-relation queries the response was YES. [2024-06-20 17:47:22,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20165 conditions, 3156 events. 1867/3156 cut-off events. For 159826/159836 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 19067 event pairs, 380 based on Foata normal form. 11/3166 useless extension candidates. Maximal degree in co-relation 20030. Up to 2549 conditions per place. [2024-06-20 17:47:22,816 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 242 selfloop transitions, 157 changer transitions 0/406 dead transitions. [2024-06-20 17:47:22,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 406 transitions, 5636 flow [2024-06-20 17:47:22,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-20 17:47:22,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-20 17:47:22,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 284 transitions. [2024-06-20 17:47:22,817 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5461538461538461 [2024-06-20 17:47:22,818 INFO L175 Difference]: Start difference. First operand has 301 places, 369 transitions, 4414 flow. Second operand 13 states and 284 transitions. [2024-06-20 17:47:22,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 406 transitions, 5636 flow [2024-06-20 17:47:23,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 406 transitions, 5334 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-20 17:47:23,405 INFO L231 Difference]: Finished difference. Result has 308 places, 375 transitions, 4498 flow [2024-06-20 17:47:23,406 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4124, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4498, PETRI_PLACES=308, PETRI_TRANSITIONS=375} [2024-06-20 17:47:23,406 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 267 predicate places. [2024-06-20 17:47:23,406 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 375 transitions, 4498 flow [2024-06-20 17:47:23,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:47:23,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:47:23,406 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:47:23,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-20 17:47:23,407 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:47:23,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:47:23,407 INFO L85 PathProgramCache]: Analyzing trace with hash -225590977, now seen corresponding path program 10 times [2024-06-20 17:47:23,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:47:23,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241139789] [2024-06-20 17:47:23,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:47:23,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:47:23,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:47:23,773 INFO 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 17:47:23,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:47:23,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241139789] [2024-06-20 17:47:23,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241139789] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:47:23,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:47:23,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:47:23,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156931162] [2024-06-20 17:47:23,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:47:23,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:47:23,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:47:23,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:47:23,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:47:23,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:47:23,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 375 transitions, 4498 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:47:23,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:47:23,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:47:23,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:47:24,505 INFO L124 PetriNetUnfolderBase]: 1864/3152 cut-off events. [2024-06-20 17:47:24,505 INFO L125 PetriNetUnfolderBase]: For 161250/161260 co-relation queries the response was YES. [2024-06-20 17:47:24,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20159 conditions, 3152 events. 1864/3152 cut-off events. For 161250/161260 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 19066 event pairs, 380 based on Foata normal form. 11/3162 useless extension candidates. Maximal degree in co-relation 20023. Up to 2546 conditions per place. [2024-06-20 17:47:24,547 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 243 selfloop transitions, 155 changer transitions 0/405 dead transitions. [2024-06-20 17:47:24,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 405 transitions, 5510 flow [2024-06-20 17:47:24,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-20 17:47:24,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-20 17:47:24,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 285 transitions. [2024-06-20 17:47:24,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5480769230769231 [2024-06-20 17:47:24,548 INFO L175 Difference]: Start difference. First operand has 308 places, 375 transitions, 4498 flow. Second operand 13 states and 285 transitions. [2024-06-20 17:47:24,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 405 transitions, 5510 flow [2024-06-20 17:47:25,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 405 transitions, 5228 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-20 17:47:25,211 INFO L231 Difference]: Finished difference. Result has 312 places, 375 transitions, 4532 flow [2024-06-20 17:47:25,211 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4216, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4532, PETRI_PLACES=312, PETRI_TRANSITIONS=375} [2024-06-20 17:47:25,211 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 271 predicate places. [2024-06-20 17:47:25,212 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 375 transitions, 4532 flow [2024-06-20 17:47:25,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:47:25,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:47:25,212 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:47:25,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-20 17:47:25,212 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:47:25,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:47:25,213 INFO L85 PathProgramCache]: Analyzing trace with hash -397354537, now seen corresponding path program 11 times [2024-06-20 17:47:25,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:47:25,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580668111] [2024-06-20 17:47:25,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:47:25,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:47:25,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:47:25,572 INFO 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 17:47:25,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:47:25,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580668111] [2024-06-20 17:47:25,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580668111] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:47:25,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:47:25,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:47:25,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643551175] [2024-06-20 17:47:25,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:47:25,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:47:25,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:47:25,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:47:25,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:47:25,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:47:25,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 375 transitions, 4532 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:47:25,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:47:25,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:47:25,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:47:26,207 INFO L124 PetriNetUnfolderBase]: 1869/3161 cut-off events. [2024-06-20 17:47:26,207 INFO L125 PetriNetUnfolderBase]: For 165632/165642 co-relation queries the response was YES. [2024-06-20 17:47:26,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20303 conditions, 3161 events. 1869/3161 cut-off events. For 165632/165642 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 19131 event pairs, 380 based on Foata normal form. 11/3171 useless extension candidates. Maximal degree in co-relation 20166. Up to 2709 conditions per place. [2024-06-20 17:47:26,245 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 305 selfloop transitions, 87 changer transitions 0/399 dead transitions. [2024-06-20 17:47:26,246 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 399 transitions, 5560 flow [2024-06-20 17:47:26,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:47:26,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:47:26,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 218 transitions. [2024-06-20 17:47:26,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.545 [2024-06-20 17:47:26,247 INFO L175 Difference]: Start difference. First operand has 312 places, 375 transitions, 4532 flow. Second operand 10 states and 218 transitions. [2024-06-20 17:47:26,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 399 transitions, 5560 flow [2024-06-20 17:47:26,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 399 transitions, 5236 flow, removed 0 selfloop flow, removed 12 redundant places. [2024-06-20 17:47:26,950 INFO L231 Difference]: Finished difference. Result has 310 places, 378 transitions, 4437 flow [2024-06-20 17:47:26,951 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4214, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4437, PETRI_PLACES=310, PETRI_TRANSITIONS=378} [2024-06-20 17:47:26,951 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 269 predicate places. [2024-06-20 17:47:26,951 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 378 transitions, 4437 flow [2024-06-20 17:47:26,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:47:26,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:47:26,951 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:47:26,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-20 17:47:26,952 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:47:26,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:47:26,952 INFO L85 PathProgramCache]: Analyzing trace with hash -397360117, now seen corresponding path program 12 times [2024-06-20 17:47:26,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:47:26,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13009160] [2024-06-20 17:47:26,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:47:26,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:47:26,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:47:27,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:47:27,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:47:27,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13009160] [2024-06-20 17:47:27,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13009160] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:47:27,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:47:27,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:47:27,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585051870] [2024-06-20 17:47:27,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:47:27,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:47:27,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:47:27,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:47:27,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:47:27,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:47:27,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 378 transitions, 4437 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:47:27,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:47:27,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:47:27,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:47:27,948 INFO L124 PetriNetUnfolderBase]: 1866/3157 cut-off events. [2024-06-20 17:47:27,949 INFO L125 PetriNetUnfolderBase]: For 166315/166325 co-relation queries the response was YES. [2024-06-20 17:47:27,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20088 conditions, 3157 events. 1866/3157 cut-off events. For 166315/166325 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 19158 event pairs, 380 based on Foata normal form. 11/3167 useless extension candidates. Maximal degree in co-relation 19950. Up to 2706 conditions per place. [2024-06-20 17:47:27,987 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 305 selfloop transitions, 84 changer transitions 0/396 dead transitions. [2024-06-20 17:47:27,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 396 transitions, 5259 flow [2024-06-20 17:47:27,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:47:27,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:47:27,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-20 17:47:27,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.56875 [2024-06-20 17:47:27,988 INFO L175 Difference]: Start difference. First operand has 310 places, 378 transitions, 4437 flow. Second operand 8 states and 182 transitions. [2024-06-20 17:47:27,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 396 transitions, 5259 flow [2024-06-20 17:47:28,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 396 transitions, 5023 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-20 17:47:28,636 INFO L231 Difference]: Finished difference. Result has 309 places, 378 transitions, 4375 flow [2024-06-20 17:47:28,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4201, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4375, PETRI_PLACES=309, PETRI_TRANSITIONS=378} [2024-06-20 17:47:28,637 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 268 predicate places. [2024-06-20 17:47:28,637 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 378 transitions, 4375 flow [2024-06-20 17:47:28,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:47:28,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:47:28,637 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:47:28,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-20 17:47:28,638 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:47:28,638 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:47:28,638 INFO L85 PathProgramCache]: Analyzing trace with hash 2045398679, now seen corresponding path program 13 times [2024-06-20 17:47:28,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:47:28,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736449611] [2024-06-20 17:47:28,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:47:28,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:47:28,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:47:29,016 INFO 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 17:47:29,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:47:29,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736449611] [2024-06-20 17:47:29,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736449611] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:47:29,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:47:29,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:47:29,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158429369] [2024-06-20 17:47:29,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:47:29,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:47:29,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:47:29,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:47:29,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:47:29,062 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:47:29,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 378 transitions, 4375 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:47:29,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:47:29,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:47:29,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:47:29,610 INFO L124 PetriNetUnfolderBase]: 1911/3235 cut-off events. [2024-06-20 17:47:29,610 INFO L125 PetriNetUnfolderBase]: For 179041/179051 co-relation queries the response was YES. [2024-06-20 17:47:29,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20675 conditions, 3235 events. 1911/3235 cut-off events. For 179041/179051 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 19687 event pairs, 380 based on Foata normal form. 11/3245 useless extension candidates. Maximal degree in co-relation 20536. Up to 2668 conditions per place. [2024-06-20 17:47:29,650 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 283 selfloop transitions, 129 changer transitions 0/419 dead transitions. [2024-06-20 17:47:29,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 419 transitions, 5750 flow [2024-06-20 17:47:29,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:47:29,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:47:29,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-20 17:47:29,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.59375 [2024-06-20 17:47:29,652 INFO L175 Difference]: Start difference. First operand has 309 places, 378 transitions, 4375 flow. Second operand 8 states and 190 transitions. [2024-06-20 17:47:29,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 419 transitions, 5750 flow [2024-06-20 17:47:30,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 419 transitions, 5582 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-20 17:47:30,331 INFO L231 Difference]: Finished difference. Result has 311 places, 396 transitions, 4743 flow [2024-06-20 17:47:30,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4207, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4743, PETRI_PLACES=311, PETRI_TRANSITIONS=396} [2024-06-20 17:47:30,332 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 270 predicate places. [2024-06-20 17:47:30,332 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 396 transitions, 4743 flow [2024-06-20 17:47:30,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:47:30,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:47:30,332 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:47:30,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-20 17:47:30,332 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:47:30,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:47:30,333 INFO L85 PathProgramCache]: Analyzing trace with hash 2045220119, now seen corresponding path program 14 times [2024-06-20 17:47:30,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:47:30,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459917449] [2024-06-20 17:47:30,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:47:30,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:47:30,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:47:30,730 INFO 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 17:47:30,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:47:30,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459917449] [2024-06-20 17:47:30,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459917449] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:47:30,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:47:30,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:47:30,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809200251] [2024-06-20 17:47:30,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:47:30,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:47:30,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:47:30,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:47:30,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:47:30,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:47:30,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 396 transitions, 4743 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:47:30,805 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:47:30,805 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:47:30,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:47:31,371 INFO L124 PetriNetUnfolderBase]: 1916/3244 cut-off events. [2024-06-20 17:47:31,372 INFO L125 PetriNetUnfolderBase]: For 184326/184336 co-relation queries the response was YES. [2024-06-20 17:47:31,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21047 conditions, 3244 events. 1916/3244 cut-off events. For 184326/184336 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 19733 event pairs, 380 based on Foata normal form. 11/3254 useless extension candidates. Maximal degree in co-relation 20906. Up to 2674 conditions per place. [2024-06-20 17:47:31,413 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 281 selfloop transitions, 139 changer transitions 0/427 dead transitions. [2024-06-20 17:47:31,413 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 427 transitions, 6000 flow [2024-06-20 17:47:31,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:47:31,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:47:31,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 229 transitions. [2024-06-20 17:47:31,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5725 [2024-06-20 17:47:31,414 INFO L175 Difference]: Start difference. First operand has 311 places, 396 transitions, 4743 flow. Second operand 10 states and 229 transitions. [2024-06-20 17:47:31,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 427 transitions, 6000 flow [2024-06-20 17:47:32,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 427 transitions, 5904 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-20 17:47:32,257 INFO L231 Difference]: Finished difference. Result has 318 places, 399 transitions, 4982 flow [2024-06-20 17:47:32,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4647, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4982, PETRI_PLACES=318, PETRI_TRANSITIONS=399} [2024-06-20 17:47:32,257 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 277 predicate places. [2024-06-20 17:47:32,257 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 399 transitions, 4982 flow [2024-06-20 17:47:32,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:47:32,258 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:47:32,258 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:47:32,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-20 17:47:32,258 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:47:32,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:47:32,258 INFO L85 PathProgramCache]: Analyzing trace with hash 2045214539, now seen corresponding path program 15 times [2024-06-20 17:47:32,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:47:32,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521633434] [2024-06-20 17:47:32,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:47:32,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:47:32,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:47:32,648 INFO 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 17:47:32,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:47:32,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521633434] [2024-06-20 17:47:32,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521633434] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:47:32,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:47:32,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:47:32,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618834524] [2024-06-20 17:47:32,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:47:32,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:47:32,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:47:32,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:47:32,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:47:32,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:47:32,737 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 399 transitions, 4982 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:47:32,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:47:32,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:47:32,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:47:33,384 INFO L124 PetriNetUnfolderBase]: 1913/3240 cut-off events. [2024-06-20 17:47:33,384 INFO L125 PetriNetUnfolderBase]: For 186157/186167 co-relation queries the response was YES. [2024-06-20 17:47:33,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21325 conditions, 3240 events. 1913/3240 cut-off events. For 186157/186167 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 19722 event pairs, 380 based on Foata normal form. 11/3250 useless extension candidates. Maximal degree in co-relation 21182. Up to 2671 conditions per place. [2024-06-20 17:47:33,418 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 290 selfloop transitions, 132 changer transitions 0/429 dead transitions. [2024-06-20 17:47:33,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 429 transitions, 6208 flow [2024-06-20 17:47:33,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:47:33,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:47:33,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 215 transitions. [2024-06-20 17:47:33,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5972222222222222 [2024-06-20 17:47:33,419 INFO L175 Difference]: Start difference. First operand has 318 places, 399 transitions, 4982 flow. Second operand 9 states and 215 transitions. [2024-06-20 17:47:33,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 429 transitions, 6208 flow [2024-06-20 17:47:34,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 429 transitions, 5945 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-20 17:47:34,177 INFO L231 Difference]: Finished difference. Result has 319 places, 399 transitions, 4997 flow [2024-06-20 17:47:34,179 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4723, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4997, PETRI_PLACES=319, PETRI_TRANSITIONS=399} [2024-06-20 17:47:34,180 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 278 predicate places. [2024-06-20 17:47:34,180 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 399 transitions, 4997 flow [2024-06-20 17:47:34,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:47:34,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:47:34,180 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:47:34,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-20 17:47:34,180 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:47:34,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:47:34,181 INFO L85 PathProgramCache]: Analyzing trace with hash 2045387519, now seen corresponding path program 16 times [2024-06-20 17:47:34,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:47:34,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109156260] [2024-06-20 17:47:34,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:47:34,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:47:34,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:47:34,603 INFO 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 17:47:34,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:47:34,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109156260] [2024-06-20 17:47:34,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109156260] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:47:34,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:47:34,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:47:34,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375535406] [2024-06-20 17:47:34,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:47:34,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:47:34,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:47:34,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:47:34,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:47:34,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:47:34,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 399 transitions, 4997 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:47:34,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:47:34,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:47:34,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:47:35,280 INFO L124 PetriNetUnfolderBase]: 1910/3236 cut-off events. [2024-06-20 17:47:35,281 INFO L125 PetriNetUnfolderBase]: For 183441/183451 co-relation queries the response was YES. [2024-06-20 17:47:35,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21242 conditions, 3236 events. 1910/3236 cut-off events. For 183441/183451 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 19690 event pairs, 380 based on Foata normal form. 11/3246 useless extension candidates. Maximal degree in co-relation 21099. Up to 2668 conditions per place. [2024-06-20 17:47:35,322 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 287 selfloop transitions, 131 changer transitions 0/425 dead transitions. [2024-06-20 17:47:35,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 425 transitions, 6205 flow [2024-06-20 17:47:35,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:47:35,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:47:35,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-20 17:47:35,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.603125 [2024-06-20 17:47:35,323 INFO L175 Difference]: Start difference. First operand has 319 places, 399 transitions, 4997 flow. Second operand 8 states and 193 transitions. [2024-06-20 17:47:35,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 425 transitions, 6205 flow [2024-06-20 17:47:36,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 425 transitions, 5929 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-20 17:47:36,019 INFO L231 Difference]: Finished difference. Result has 320 places, 399 transitions, 4993 flow [2024-06-20 17:47:36,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4725, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4993, PETRI_PLACES=320, PETRI_TRANSITIONS=399} [2024-06-20 17:47:36,020 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 279 predicate places. [2024-06-20 17:47:36,020 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 399 transitions, 4993 flow [2024-06-20 17:47:36,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:47:36,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:47:36,020 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:47:36,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-20 17:47:36,020 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:47:36,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:47:36,021 INFO L85 PathProgramCache]: Analyzing trace with hash 2045566079, now seen corresponding path program 17 times [2024-06-20 17:47:36,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:47:36,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125567467] [2024-06-20 17:47:36,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:47:36,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:47:36,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:47:36,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:47:36,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:47:36,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125567467] [2024-06-20 17:47:36,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125567467] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:47:36,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:47:36,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:47:36,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831042130] [2024-06-20 17:47:36,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:47:36,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:47:36,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:47:36,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:47:36,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:47:36,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:47:36,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 399 transitions, 4993 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:47:36,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:47:36,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:47:36,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:47:37,102 INFO L124 PetriNetUnfolderBase]: 1907/3232 cut-off events. [2024-06-20 17:47:37,102 INFO L125 PetriNetUnfolderBase]: For 180423/180433 co-relation queries the response was YES. [2024-06-20 17:47:37,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21125 conditions, 3232 events. 1907/3232 cut-off events. For 180423/180433 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 19684 event pairs, 380 based on Foata normal form. 11/3242 useless extension candidates. Maximal degree in co-relation 20982. Up to 2665 conditions per place. [2024-06-20 17:47:37,157 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 278 selfloop transitions, 139 changer transitions 0/424 dead transitions. [2024-06-20 17:47:37,158 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 424 transitions, 6041 flow [2024-06-20 17:47:37,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 17:47:37,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 17:47:37,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 243 transitions. [2024-06-20 17:47:37,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5522727272727272 [2024-06-20 17:47:37,159 INFO L175 Difference]: Start difference. First operand has 320 places, 399 transitions, 4993 flow. Second operand 11 states and 243 transitions. [2024-06-20 17:47:37,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 424 transitions, 6041 flow [2024-06-20 17:47:37,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 424 transitions, 5757 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-20 17:47:37,888 INFO L231 Difference]: Finished difference. Result has 324 places, 399 transitions, 4994 flow [2024-06-20 17:47:37,889 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4709, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4994, PETRI_PLACES=324, PETRI_TRANSITIONS=399} [2024-06-20 17:47:37,889 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 283 predicate places. [2024-06-20 17:47:37,889 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 399 transitions, 4994 flow [2024-06-20 17:47:37,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:47:37,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:47:37,889 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:47:37,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-20 17:47:37,890 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:47:37,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:47:37,890 INFO L85 PathProgramCache]: Analyzing trace with hash 2045571659, now seen corresponding path program 18 times [2024-06-20 17:47:37,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:47:37,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865700045] [2024-06-20 17:47:37,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:47:37,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:47:37,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:47:38,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:47:38,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:47:38,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865700045] [2024-06-20 17:47:38,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865700045] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:47:38,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:47:38,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:47:38,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542971888] [2024-06-20 17:47:38,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:47:38,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:47:38,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:47:38,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:47:38,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:47:38,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:47:38,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 399 transitions, 4994 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:47:38,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:47:38,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:47:38,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:47:38,903 INFO L124 PetriNetUnfolderBase]: 1904/3228 cut-off events. [2024-06-20 17:47:38,903 INFO L125 PetriNetUnfolderBase]: For 181389/181399 co-relation queries the response was YES. [2024-06-20 17:47:38,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21079 conditions, 3228 events. 1904/3228 cut-off events. For 181389/181399 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 19616 event pairs, 380 based on Foata normal form. 11/3238 useless extension candidates. Maximal degree in co-relation 20935. Up to 2662 conditions per place. [2024-06-20 17:47:38,945 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 277 selfloop transitions, 138 changer transitions 0/422 dead transitions. [2024-06-20 17:47:38,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 422 transitions, 5880 flow [2024-06-20 17:47:38,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:47:38,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:47:38,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 225 transitions. [2024-06-20 17:47:38,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-06-20 17:47:38,947 INFO L175 Difference]: Start difference. First operand has 324 places, 399 transitions, 4994 flow. Second operand 10 states and 225 transitions. [2024-06-20 17:47:38,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 422 transitions, 5880 flow [2024-06-20 17:47:39,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 422 transitions, 5567 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-20 17:47:39,670 INFO L231 Difference]: Finished difference. Result has 325 places, 399 transitions, 4963 flow [2024-06-20 17:47:39,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4681, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4963, PETRI_PLACES=325, PETRI_TRANSITIONS=399} [2024-06-20 17:47:39,671 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 284 predicate places. [2024-06-20 17:47:39,671 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 399 transitions, 4963 flow [2024-06-20 17:47:39,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:47:39,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:47:39,671 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:47:39,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-20 17:47:39,671 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:47:39,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:47:39,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1475184831, now seen corresponding path program 19 times [2024-06-20 17:47:39,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:47:39,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098768574] [2024-06-20 17:47:39,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:47:39,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:47:39,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:47:40,012 INFO 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 17:47:40,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:47:40,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098768574] [2024-06-20 17:47:40,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098768574] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:47:40,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:47:40,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:47:40,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245708673] [2024-06-20 17:47:40,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:47:40,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:47:40,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:47:40,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:47:40,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:47:40,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:47:40,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 399 transitions, 4963 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:47:40,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:47:40,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:47:40,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:47:40,651 INFO L124 PetriNetUnfolderBase]: 1909/3234 cut-off events. [2024-06-20 17:47:40,651 INFO L125 PetriNetUnfolderBase]: For 185839/185845 co-relation queries the response was YES. [2024-06-20 17:47:40,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21140 conditions, 3234 events. 1909/3234 cut-off events. For 185839/185845 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 19670 event pairs, 408 based on Foata normal form. 4/3236 useless extension candidates. Maximal degree in co-relation 20995. Up to 2589 conditions per place. [2024-06-20 17:47:40,692 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 221 selfloop transitions, 192 changer transitions 0/420 dead transitions. [2024-06-20 17:47:40,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 420 transitions, 6019 flow [2024-06-20 17:47:40,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:47:40,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:47:40,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 218 transitions. [2024-06-20 17:47:40,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.545 [2024-06-20 17:47:40,694 INFO L175 Difference]: Start difference. First operand has 325 places, 399 transitions, 4963 flow. Second operand 10 states and 218 transitions. [2024-06-20 17:47:40,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 420 transitions, 6019 flow [2024-06-20 17:47:41,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 420 transitions, 5677 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-20 17:47:41,443 INFO L231 Difference]: Finished difference. Result has 325 places, 402 transitions, 5041 flow [2024-06-20 17:47:41,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4621, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5041, PETRI_PLACES=325, PETRI_TRANSITIONS=402} [2024-06-20 17:47:41,443 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 284 predicate places. [2024-06-20 17:47:41,443 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 402 transitions, 5041 flow [2024-06-20 17:47:41,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:47:41,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:47:41,443 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:47:41,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-20 17:47:41,444 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:47:41,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:47:41,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1135365621, now seen corresponding path program 20 times [2024-06-20 17:47:41,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:47:41,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036950251] [2024-06-20 17:47:41,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:47:41,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:47:41,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:47:41,799 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 17:47:41,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:47:41,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036950251] [2024-06-20 17:47:41,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036950251] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:47:41,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:47:41,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:47:41,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175980977] [2024-06-20 17:47:41,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:47:41,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:47:41,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:47:41,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:47:41,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:47:41,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:47:41,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 402 transitions, 5041 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:47:41,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:47:41,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:47:41,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:47:42,486 INFO L124 PetriNetUnfolderBase]: 1922/3259 cut-off events. [2024-06-20 17:47:42,486 INFO L125 PetriNetUnfolderBase]: For 192834/192844 co-relation queries the response was YES. [2024-06-20 17:47:42,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21443 conditions, 3259 events. 1922/3259 cut-off events. For 192834/192844 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 19892 event pairs, 380 based on Foata normal form. 11/3269 useless extension candidates. Maximal degree in co-relation 21297. Up to 2604 conditions per place. [2024-06-20 17:47:42,526 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 235 selfloop transitions, 204 changer transitions 0/446 dead transitions. [2024-06-20 17:47:42,526 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 446 transitions, 6403 flow [2024-06-20 17:47:42,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-20 17:47:42,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-20 17:47:42,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 309 transitions. [2024-06-20 17:47:42,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5517857142857143 [2024-06-20 17:47:42,527 INFO L175 Difference]: Start difference. First operand has 325 places, 402 transitions, 5041 flow. Second operand 14 states and 309 transitions. [2024-06-20 17:47:42,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 446 transitions, 6403 flow [2024-06-20 17:47:43,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 446 transitions, 6064 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-20 17:47:43,300 INFO L231 Difference]: Finished difference. Result has 332 places, 408 transitions, 5196 flow [2024-06-20 17:47:43,300 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4708, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=198, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=5196, PETRI_PLACES=332, PETRI_TRANSITIONS=408} [2024-06-20 17:47:43,300 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 291 predicate places. [2024-06-20 17:47:43,300 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 408 transitions, 5196 flow [2024-06-20 17:47:43,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:47:43,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:47:43,301 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:47:43,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-20 17:47:43,301 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:47:43,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:47:43,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1135360041, now seen corresponding path program 21 times [2024-06-20 17:47:43,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:47:43,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610557846] [2024-06-20 17:47:43,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:47:43,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:47:43,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:47:43,647 INFO 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 17:47:43,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:47:43,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610557846] [2024-06-20 17:47:43,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610557846] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:47:43,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:47:43,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:47:43,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120659409] [2024-06-20 17:47:43,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:47:43,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:47:43,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:47:43,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:47:43,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:47:43,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:47:43,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 408 transitions, 5196 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:47:43,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:47:43,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:47:43,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:47:44,337 INFO L124 PetriNetUnfolderBase]: 1919/3255 cut-off events. [2024-06-20 17:47:44,337 INFO L125 PetriNetUnfolderBase]: For 194152/194162 co-relation queries the response was YES. [2024-06-20 17:47:44,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21470 conditions, 3255 events. 1919/3255 cut-off events. For 194152/194162 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 19814 event pairs, 380 based on Foata normal form. 11/3265 useless extension candidates. Maximal degree in co-relation 21323. Up to 2601 conditions per place. [2024-06-20 17:47:44,380 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 232 selfloop transitions, 204 changer transitions 0/443 dead transitions. [2024-06-20 17:47:44,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 443 transitions, 6316 flow [2024-06-20 17:47:44,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 17:47:44,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 17:47:44,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 272 transitions. [2024-06-20 17:47:44,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5666666666666667 [2024-06-20 17:47:44,381 INFO L175 Difference]: Start difference. First operand has 332 places, 408 transitions, 5196 flow. Second operand 12 states and 272 transitions. [2024-06-20 17:47:44,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 443 transitions, 6316 flow [2024-06-20 17:47:45,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 443 transitions, 5920 flow, removed 16 selfloop flow, removed 12 redundant places. [2024-06-20 17:47:45,147 INFO L231 Difference]: Finished difference. Result has 332 places, 408 transitions, 5226 flow [2024-06-20 17:47:45,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4804, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=204, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5226, PETRI_PLACES=332, PETRI_TRANSITIONS=408} [2024-06-20 17:47:45,148 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 291 predicate places. [2024-06-20 17:47:45,148 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 408 transitions, 5226 flow [2024-06-20 17:47:45,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:47:45,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:47:45,148 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:47:45,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-20 17:47:45,149 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:47:45,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:47:45,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1142717271, now seen corresponding path program 22 times [2024-06-20 17:47:45,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:47:45,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274620984] [2024-06-20 17:47:45,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:47:45,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:47:45,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:47:45,476 INFO 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 17:47:45,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:47:45,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274620984] [2024-06-20 17:47:45,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274620984] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:47:45,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:47:45,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:47:45,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527898149] [2024-06-20 17:47:45,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:47:45,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:47:45,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:47:45,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:47:45,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:47:45,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:47:45,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 408 transitions, 5226 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:47:45,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:47:45,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:47:45,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:47:46,158 INFO L124 PetriNetUnfolderBase]: 1916/3251 cut-off events. [2024-06-20 17:47:46,158 INFO L125 PetriNetUnfolderBase]: For 186746/186756 co-relation queries the response was YES. [2024-06-20 17:47:46,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21324 conditions, 3251 events. 1916/3251 cut-off events. For 186746/186756 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 19844 event pairs, 380 based on Foata normal form. 11/3261 useless extension candidates. Maximal degree in co-relation 21178. Up to 2598 conditions per place. [2024-06-20 17:47:46,194 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 226 selfloop transitions, 203 changer transitions 0/436 dead transitions. [2024-06-20 17:47:46,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 436 transitions, 6152 flow [2024-06-20 17:47:46,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 17:47:46,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 17:47:46,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 263 transitions. [2024-06-20 17:47:46,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5479166666666667 [2024-06-20 17:47:46,196 INFO L175 Difference]: Start difference. First operand has 332 places, 408 transitions, 5226 flow. Second operand 12 states and 263 transitions. [2024-06-20 17:47:46,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 436 transitions, 6152 flow [2024-06-20 17:47:46,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 436 transitions, 5720 flow, removed 8 selfloop flow, removed 13 redundant places. [2024-06-20 17:47:46,885 INFO L231 Difference]: Finished difference. Result has 331 places, 408 transitions, 5210 flow [2024-06-20 17:47:46,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4794, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=203, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5210, PETRI_PLACES=331, PETRI_TRANSITIONS=408} [2024-06-20 17:47:46,885 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 290 predicate places. [2024-06-20 17:47:46,886 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 408 transitions, 5210 flow [2024-06-20 17:47:46,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:47:46,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:47:46,886 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:47:46,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-20 17:47:46,886 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:47:46,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:47:46,886 INFO L85 PathProgramCache]: Analyzing trace with hash -443209927, now seen corresponding path program 23 times [2024-06-20 17:47:46,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:47:46,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743338482] [2024-06-20 17:47:46,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:47:46,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:47:46,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:47:47,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:47:47,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:47:47,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743338482] [2024-06-20 17:47:47,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743338482] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:47:47,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:47:47,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:47:47,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914371413] [2024-06-20 17:47:47,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:47:47,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:47:47,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:47:47,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:47:47,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:47:47,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-20 17:47:47,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 408 transitions, 5210 flow. Second operand has 11 states, 11 states have (on average 14.545454545454545) internal successors, (160), 11 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:47:47,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:47:47,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-20 17:47:47,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:47:48,042 INFO L124 PetriNetUnfolderBase]: 2082/3542 cut-off events. [2024-06-20 17:47:48,042 INFO L125 PetriNetUnfolderBase]: For 187048/187050 co-relation queries the response was YES. [2024-06-20 17:47:48,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23091 conditions, 3542 events. 2082/3542 cut-off events. For 187048/187050 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 22083 event pairs, 358 based on Foata normal form. 3/3544 useless extension candidates. Maximal degree in co-relation 22945. Up to 2871 conditions per place. [2024-06-20 17:47:48,087 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 355 selfloop transitions, 169 changer transitions 0/530 dead transitions. [2024-06-20 17:47:48,088 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 530 transitions, 7652 flow [2024-06-20 17:47:48,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 17:47:48,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 17:47:48,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 253 transitions. [2024-06-20 17:47:48,089 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5270833333333333 [2024-06-20 17:47:48,089 INFO L175 Difference]: Start difference. First operand has 331 places, 408 transitions, 5210 flow. Second operand 12 states and 253 transitions. [2024-06-20 17:47:48,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 530 transitions, 7652 flow [2024-06-20 17:47:48,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 530 transitions, 6980 flow, removed 2 selfloop flow, removed 14 redundant places. [2024-06-20 17:47:48,804 INFO L231 Difference]: Finished difference. Result has 332 places, 484 transitions, 6098 flow [2024-06-20 17:47:48,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4671, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6098, PETRI_PLACES=332, PETRI_TRANSITIONS=484} [2024-06-20 17:47:48,805 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 291 predicate places. [2024-06-20 17:47:48,805 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 484 transitions, 6098 flow [2024-06-20 17:47:48,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.545454545454545) internal successors, (160), 11 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:47:48,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:47:48,805 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:47:48,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-20 17:47:48,805 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:47:48,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:47:48,806 INFO L85 PathProgramCache]: Analyzing trace with hash 110851351, now seen corresponding path program 24 times [2024-06-20 17:47:48,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:47:48,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424289238] [2024-06-20 17:47:48,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:47:48,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:47:48,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:47:49,236 INFO 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 17:47:49,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:47:49,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424289238] [2024-06-20 17:47:49,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424289238] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:47:49,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:47:49,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:47:49,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739580026] [2024-06-20 17:47:49,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:47:49,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:47:49,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:47:49,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:47:49,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:47:49,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-20 17:47:49,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 484 transitions, 6098 flow. Second operand has 11 states, 11 states have (on average 14.545454545454545) internal successors, (160), 11 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:47:49,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:47:49,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-20 17:47:49,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:47:50,030 INFO L124 PetriNetUnfolderBase]: 2087/3555 cut-off events. [2024-06-20 17:47:50,031 INFO L125 PetriNetUnfolderBase]: For 189848/189858 co-relation queries the response was YES. [2024-06-20 17:47:50,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23557 conditions, 3555 events. 2087/3555 cut-off events. For 189848/189858 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 22211 event pairs, 380 based on Foata normal form. 11/3565 useless extension candidates. Maximal degree in co-relation 23408. Up to 2932 conditions per place. [2024-06-20 17:47:50,076 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 389 selfloop transitions, 117 changer transitions 0/512 dead transitions. [2024-06-20 17:47:50,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 512 transitions, 7375 flow [2024-06-20 17:47:50,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:47:50,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:47:50,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-20 17:47:50,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.56875 [2024-06-20 17:47:50,077 INFO L175 Difference]: Start difference. First operand has 332 places, 484 transitions, 6098 flow. Second operand 8 states and 182 transitions. [2024-06-20 17:47:50,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 512 transitions, 7375 flow [2024-06-20 17:47:50,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 512 transitions, 7229 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-20 17:47:50,814 INFO L231 Difference]: Finished difference. Result has 334 places, 487 transitions, 6244 flow [2024-06-20 17:47:50,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5952, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=484, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=370, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6244, PETRI_PLACES=334, PETRI_TRANSITIONS=487} [2024-06-20 17:47:50,814 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 293 predicate places. [2024-06-20 17:47:50,815 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 487 transitions, 6244 flow [2024-06-20 17:47:50,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.545454545454545) internal successors, (160), 11 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:47:50,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:47:50,815 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:47:50,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-20 17:47:50,815 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:47:50,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:47:50,815 INFO L85 PathProgramCache]: Analyzing trace with hash 110840191, now seen corresponding path program 25 times [2024-06-20 17:47:50,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:47:50,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654181700] [2024-06-20 17:47:50,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:47:50,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:47:50,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:47:51,238 INFO 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 17:47:51,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:47:51,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654181700] [2024-06-20 17:47:51,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654181700] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:47:51,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:47:51,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:47:51,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589407305] [2024-06-20 17:47:51,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:47:51,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:47:51,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:47:51,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:47:51,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:47:51,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-20 17:47:51,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 487 transitions, 6244 flow. Second operand has 11 states, 11 states have (on average 14.545454545454545) internal successors, (160), 11 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:47:51,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:47:51,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-20 17:47:51,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:47:51,999 INFO L124 PetriNetUnfolderBase]: 2084/3551 cut-off events. [2024-06-20 17:47:51,999 INFO L125 PetriNetUnfolderBase]: For 191312/191322 co-relation queries the response was YES. [2024-06-20 17:47:52,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23751 conditions, 3551 events. 2084/3551 cut-off events. For 191312/191322 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 22205 event pairs, 380 based on Foata normal form. 11/3561 useless extension candidates. Maximal degree in co-relation 23600. Up to 2929 conditions per place. [2024-06-20 17:47:52,047 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 389 selfloop transitions, 121 changer transitions 0/516 dead transitions. [2024-06-20 17:47:52,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 516 transitions, 7336 flow [2024-06-20 17:47:52,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:47:52,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:47:52,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 217 transitions. [2024-06-20 17:47:52,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5425 [2024-06-20 17:47:52,048 INFO L175 Difference]: Start difference. First operand has 334 places, 487 transitions, 6244 flow. Second operand 10 states and 217 transitions. [2024-06-20 17:47:52,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 516 transitions, 7336 flow [2024-06-20 17:47:52,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 516 transitions, 7105 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-20 17:47:52,858 INFO L231 Difference]: Finished difference. Result has 338 places, 487 transitions, 6268 flow [2024-06-20 17:47:52,858 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6013, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6268, PETRI_PLACES=338, PETRI_TRANSITIONS=487} [2024-06-20 17:47:52,858 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 297 predicate places. [2024-06-20 17:47:52,858 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 487 transitions, 6268 flow [2024-06-20 17:47:52,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.545454545454545) internal successors, (160), 11 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:47:52,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:47:52,859 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:47:52,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-20 17:47:52,859 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:47:52,859 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:47:52,859 INFO L85 PathProgramCache]: Analyzing trace with hash 123738361, now seen corresponding path program 26 times [2024-06-20 17:47:52,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:47:52,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510674161] [2024-06-20 17:47:52,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:47:52,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:47:52,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:47:53,255 INFO 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 17:47:53,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:47:53,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510674161] [2024-06-20 17:47:53,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510674161] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:47:53,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:47:53,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:47:53,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60786395] [2024-06-20 17:47:53,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:47:53,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:47:53,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:47:53,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:47:53,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:47:53,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-20 17:47:53,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 487 transitions, 6268 flow. Second operand has 11 states, 11 states have (on average 14.545454545454545) internal successors, (160), 11 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:47:53,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:47:53,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-20 17:47:53,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:47:53,937 INFO L124 PetriNetUnfolderBase]: 2089/3556 cut-off events. [2024-06-20 17:47:53,937 INFO L125 PetriNetUnfolderBase]: For 190800/190802 co-relation queries the response was YES. [2024-06-20 17:47:53,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23830 conditions, 3556 events. 2089/3556 cut-off events. For 190800/190802 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 22190 event pairs, 358 based on Foata normal form. 3/3558 useless extension candidates. Maximal degree in co-relation 23679. Up to 2925 conditions per place. [2024-06-20 17:47:53,984 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 377 selfloop transitions, 144 changer transitions 0/527 dead transitions. [2024-06-20 17:47:53,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 527 transitions, 7787 flow [2024-06-20 17:47:53,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:47:53,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:47:53,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 181 transitions. [2024-06-20 17:47:53,985 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.565625 [2024-06-20 17:47:53,985 INFO L175 Difference]: Start difference. First operand has 338 places, 487 transitions, 6268 flow. Second operand 8 states and 181 transitions. [2024-06-20 17:47:53,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 527 transitions, 7787 flow [2024-06-20 17:47:54,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 527 transitions, 7198 flow, removed 2 selfloop flow, removed 13 redundant places. [2024-06-20 17:47:54,779 INFO L231 Difference]: Finished difference. Result has 334 places, 494 transitions, 6185 flow [2024-06-20 17:47:54,779 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5716, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6185, PETRI_PLACES=334, PETRI_TRANSITIONS=494} [2024-06-20 17:47:54,779 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 293 predicate places. [2024-06-20 17:47:54,779 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 494 transitions, 6185 flow [2024-06-20 17:47:54,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.545454545454545) internal successors, (160), 11 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:47:54,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:47:54,780 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:47:54,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-20 17:47:54,780 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:47:54,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:47:54,780 INFO L85 PathProgramCache]: Analyzing trace with hash -65048553, now seen corresponding path program 27 times [2024-06-20 17:47:54,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:47:54,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183555605] [2024-06-20 17:47:54,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:47:54,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:47:54,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:47:55,198 INFO 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 17:47:55,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:47:55,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183555605] [2024-06-20 17:47:55,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183555605] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:47:55,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:47:55,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:47:55,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008763824] [2024-06-20 17:47:55,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:47:55,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:47:55,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:47:55,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:47:55,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:47:55,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-20 17:47:55,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 494 transitions, 6185 flow. Second operand has 11 states, 11 states have (on average 14.545454545454545) internal successors, (160), 11 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:47:55,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:47:55,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-20 17:47:55,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:47:55,975 INFO L124 PetriNetUnfolderBase]: 2102/3578 cut-off events. [2024-06-20 17:47:55,975 INFO L125 PetriNetUnfolderBase]: For 193209/193211 co-relation queries the response was YES. [2024-06-20 17:47:56,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24073 conditions, 3578 events. 2102/3578 cut-off events. For 193209/193211 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 22423 event pairs, 356 based on Foata normal form. 3/3580 useless extension candidates. Maximal degree in co-relation 23921. Up to 2940 conditions per place. [2024-06-20 17:47:56,025 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 373 selfloop transitions, 159 changer transitions 0/538 dead transitions. [2024-06-20 17:47:56,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 538 transitions, 7876 flow [2024-06-20 17:47:56,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 17:47:56,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 17:47:56,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 254 transitions. [2024-06-20 17:47:56,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5291666666666667 [2024-06-20 17:47:56,026 INFO L175 Difference]: Start difference. First operand has 334 places, 494 transitions, 6185 flow. Second operand 12 states and 254 transitions. [2024-06-20 17:47:56,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 538 transitions, 7876 flow [2024-06-20 17:47:56,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 538 transitions, 7654 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-20 17:47:56,770 INFO L231 Difference]: Finished difference. Result has 343 places, 501 transitions, 6415 flow [2024-06-20 17:47:56,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5969, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6415, PETRI_PLACES=343, PETRI_TRANSITIONS=501} [2024-06-20 17:47:56,771 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 302 predicate places. [2024-06-20 17:47:56,771 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 501 transitions, 6415 flow [2024-06-20 17:47:56,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.545454545454545) internal successors, (160), 11 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:47:56,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:47:56,771 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:47:56,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-20 17:47:56,771 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:47:56,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:47:56,772 INFO L85 PathProgramCache]: Analyzing trace with hash 289972141, now seen corresponding path program 28 times [2024-06-20 17:47:56,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:47:56,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283797868] [2024-06-20 17:47:56,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:47:56,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:47:56,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:47:57,190 INFO 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 17:47:57,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:47:57,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283797868] [2024-06-20 17:47:57,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283797868] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:47:57,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:47:57,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:47:57,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652441754] [2024-06-20 17:47:57,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:47:57,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:47:57,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:47:57,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:47:57,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:47:57,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-20 17:47:57,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 501 transitions, 6415 flow. Second operand has 11 states, 11 states have (on average 14.545454545454545) internal successors, (160), 11 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:47:57,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:47:57,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-20 17:47:57,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:47:57,933 INFO L124 PetriNetUnfolderBase]: 2099/3574 cut-off events. [2024-06-20 17:47:57,934 INFO L125 PetriNetUnfolderBase]: For 194929/194931 co-relation queries the response was YES. [2024-06-20 17:47:57,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24071 conditions, 3574 events. 2099/3574 cut-off events. For 194929/194931 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 22348 event pairs, 356 based on Foata normal form. 3/3576 useless extension candidates. Maximal degree in co-relation 23917. Up to 2937 conditions per place. [2024-06-20 17:47:57,981 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 372 selfloop transitions, 158 changer transitions 0/536 dead transitions. [2024-06-20 17:47:57,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 536 transitions, 7822 flow [2024-06-20 17:47:57,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 17:47:57,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 17:47:57,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 234 transitions. [2024-06-20 17:47:57,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5318181818181819 [2024-06-20 17:47:57,983 INFO L175 Difference]: Start difference. First operand has 343 places, 501 transitions, 6415 flow. Second operand 11 states and 234 transitions. [2024-06-20 17:47:57,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 536 transitions, 7822 flow [2024-06-20 17:47:58,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 536 transitions, 7546 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-20 17:47:58,927 INFO L231 Difference]: Finished difference. Result has 348 places, 501 transitions, 6461 flow [2024-06-20 17:47:58,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6139, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=501, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6461, PETRI_PLACES=348, PETRI_TRANSITIONS=501} [2024-06-20 17:47:58,927 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 307 predicate places. [2024-06-20 17:47:58,927 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 501 transitions, 6461 flow [2024-06-20 17:47:58,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.545454545454545) internal successors, (160), 11 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:47:58,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:47:58,928 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:47:58,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-20 17:47:58,928 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:47:58,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:47:58,928 INFO L85 PathProgramCache]: Analyzing trace with hash 282614911, now seen corresponding path program 29 times [2024-06-20 17:47:58,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:47:58,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871655824] [2024-06-20 17:47:58,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:47:58,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:47:58,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:47:59,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:47:59,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:47:59,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871655824] [2024-06-20 17:47:59,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871655824] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:47:59,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:47:59,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:47:59,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736658203] [2024-06-20 17:47:59,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:47:59,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:47:59,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:47:59,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:47:59,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:47:59,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-20 17:47:59,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 501 transitions, 6461 flow. Second operand has 11 states, 11 states have (on average 14.545454545454545) internal successors, (160), 11 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:47:59,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:47:59,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-20 17:47:59,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:48:00,063 INFO L124 PetriNetUnfolderBase]: 2096/3570 cut-off events. [2024-06-20 17:48:00,064 INFO L125 PetriNetUnfolderBase]: For 196340/196342 co-relation queries the response was YES. [2024-06-20 17:48:00,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23988 conditions, 3570 events. 2096/3570 cut-off events. For 196340/196342 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 22365 event pairs, 356 based on Foata normal form. 3/3572 useless extension candidates. Maximal degree in co-relation 23833. Up to 2934 conditions per place. [2024-06-20 17:48:00,112 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 368 selfloop transitions, 163 changer transitions 0/537 dead transitions. [2024-06-20 17:48:00,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 537 transitions, 7710 flow [2024-06-20 17:48:00,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-20 17:48:00,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-20 17:48:00,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 267 transitions. [2024-06-20 17:48:00,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5134615384615384 [2024-06-20 17:48:00,114 INFO L175 Difference]: Start difference. First operand has 348 places, 501 transitions, 6461 flow. Second operand 13 states and 267 transitions. [2024-06-20 17:48:00,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 537 transitions, 7710 flow [2024-06-20 17:48:00,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 537 transitions, 7326 flow, removed 8 selfloop flow, removed 10 redundant places. [2024-06-20 17:48:00,941 INFO L231 Difference]: Finished difference. Result has 351 places, 501 transitions, 6409 flow [2024-06-20 17:48:00,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6077, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=501, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6409, PETRI_PLACES=351, PETRI_TRANSITIONS=501} [2024-06-20 17:48:00,942 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 310 predicate places. [2024-06-20 17:48:00,942 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 501 transitions, 6409 flow [2024-06-20 17:48:00,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.545454545454545) internal successors, (160), 11 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:48:00,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:48:00,942 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:48:00,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-20 17:48:00,943 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:48:00,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:48:00,943 INFO L85 PathProgramCache]: Analyzing trace with hash -14995799, now seen corresponding path program 30 times [2024-06-20 17:48:00,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:48:00,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611369606] [2024-06-20 17:48:00,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:48:00,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:48:00,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:48:01,326 INFO 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 17:48:01,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:48:01,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611369606] [2024-06-20 17:48:01,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611369606] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:48:01,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:48:01,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:48:01,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603522420] [2024-06-20 17:48:01,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:48:01,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:48:01,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:48:01,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:48:01,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:48:01,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:48:01,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 501 transitions, 6409 flow. Second operand has 10 states, 10 states have (on average 15.6) internal successors, (156), 10 states have internal predecessors, (156), 0 states have call successors, (0), 0 states 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 17:48:01,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:48:01,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:48:01,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:48:02,113 INFO L124 PetriNetUnfolderBase]: 2109/3592 cut-off events. [2024-06-20 17:48:02,114 INFO L125 PetriNetUnfolderBase]: For 203767/203769 co-relation queries the response was YES. [2024-06-20 17:48:02,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24267 conditions, 3592 events. 2109/3592 cut-off events. For 203767/203769 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 22550 event pairs, 356 based on Foata normal form. 3/3594 useless extension candidates. Maximal degree in co-relation 24112. Up to 3040 conditions per place. [2024-06-20 17:48:02,159 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 431 selfloop transitions, 99 changer transitions 0/537 dead transitions. [2024-06-20 17:48:02,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 537 transitions, 7824 flow [2024-06-20 17:48:02,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-20 17:48:02,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-20 17:48:02,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 311 transitions. [2024-06-20 17:48:02,160 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5183333333333333 [2024-06-20 17:48:02,160 INFO L175 Difference]: Start difference. First operand has 351 places, 501 transitions, 6409 flow. Second operand 15 states and 311 transitions. [2024-06-20 17:48:02,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 537 transitions, 7824 flow [2024-06-20 17:48:03,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 537 transitions, 7510 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-20 17:48:03,057 INFO L231 Difference]: Finished difference. Result has 356 places, 507 transitions, 6421 flow [2024-06-20 17:48:03,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6095, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=501, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=6421, PETRI_PLACES=356, PETRI_TRANSITIONS=507} [2024-06-20 17:48:03,058 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 315 predicate places. [2024-06-20 17:48:03,058 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 507 transitions, 6421 flow [2024-06-20 17:48:03,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.6) internal successors, (156), 10 states have internal predecessors, (156), 0 states have call successors, (0), 0 states 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 17:48:03,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:48:03,058 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:48:03,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-20 17:48:03,058 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:48:03,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:48:03,059 INFO L85 PathProgramCache]: Analyzing trace with hash -15001379, now seen corresponding path program 31 times [2024-06-20 17:48:03,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:48:03,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747618125] [2024-06-20 17:48:03,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:48:03,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:48:03,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:48:03,416 INFO 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 17:48:03,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:48:03,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747618125] [2024-06-20 17:48:03,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747618125] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:48:03,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:48:03,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:48:03,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038464731] [2024-06-20 17:48:03,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:48:03,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:48:03,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:48:03,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:48:03,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:48:03,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:48:03,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 507 transitions, 6421 flow. Second operand has 10 states, 10 states have (on average 15.6) internal successors, (156), 10 states have internal predecessors, (156), 0 states have call successors, (0), 0 states 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 17:48:03,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:48:03,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:48:03,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:48:04,154 INFO L124 PetriNetUnfolderBase]: 2106/3588 cut-off events. [2024-06-20 17:48:04,154 INFO L125 PetriNetUnfolderBase]: For 206387/206389 co-relation queries the response was YES. [2024-06-20 17:48:04,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24400 conditions, 3588 events. 2106/3588 cut-off events. For 206387/206389 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 22533 event pairs, 356 based on Foata normal form. 3/3590 useless extension candidates. Maximal degree in co-relation 24244. Up to 3037 conditions per place. [2024-06-20 17:48:04,202 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 429 selfloop transitions, 99 changer transitions 0/535 dead transitions. [2024-06-20 17:48:04,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 535 transitions, 7546 flow [2024-06-20 17:48:04,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-20 17:48:04,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-20 17:48:04,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 293 transitions. [2024-06-20 17:48:04,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5232142857142857 [2024-06-20 17:48:04,203 INFO L175 Difference]: Start difference. First operand has 356 places, 507 transitions, 6421 flow. Second operand 14 states and 293 transitions. [2024-06-20 17:48:04,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 535 transitions, 7546 flow [2024-06-20 17:48:05,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 535 transitions, 7311 flow, removed 55 selfloop flow, removed 11 redundant places. [2024-06-20 17:48:05,109 INFO L231 Difference]: Finished difference. Result has 359 places, 507 transitions, 6390 flow [2024-06-20 17:48:05,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6186, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=507, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=6390, PETRI_PLACES=359, PETRI_TRANSITIONS=507} [2024-06-20 17:48:05,110 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 318 predicate places. [2024-06-20 17:48:05,110 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 507 transitions, 6390 flow [2024-06-20 17:48:05,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.6) internal successors, (156), 10 states have internal predecessors, (156), 0 states have call successors, (0), 0 states 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 17:48:05,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:48:05,110 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:48:05,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-20 17:48:05,111 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:48:05,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:48:05,111 INFO L85 PathProgramCache]: Analyzing trace with hash -18720449, now seen corresponding path program 32 times [2024-06-20 17:48:05,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:48:05,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412513933] [2024-06-20 17:48:05,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:48:05,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:48:05,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:48:05,462 INFO 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 17:48:05,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:48:05,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412513933] [2024-06-20 17:48:05,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412513933] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:48:05,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:48:05,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:48:05,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893819611] [2024-06-20 17:48:05,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:48:05,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:48:05,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:48:05,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:48:05,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:48:05,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:48:05,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 507 transitions, 6390 flow. Second operand has 10 states, 10 states have (on average 15.6) internal successors, (156), 10 states have internal predecessors, (156), 0 states have call successors, (0), 0 states 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 17:48:05,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:48:05,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:48:05,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:48:06,185 INFO L124 PetriNetUnfolderBase]: 2103/3584 cut-off events. [2024-06-20 17:48:06,185 INFO L125 PetriNetUnfolderBase]: For 206580/206582 co-relation queries the response was YES. [2024-06-20 17:48:06,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24403 conditions, 3584 events. 2103/3584 cut-off events. For 206580/206582 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 22487 event pairs, 356 based on Foata normal form. 3/3586 useless extension candidates. Maximal degree in co-relation 24246. Up to 2730 conditions per place. [2024-06-20 17:48:06,234 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 219 selfloop transitions, 312 changer transitions 0/538 dead transitions. [2024-06-20 17:48:06,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 538 transitions, 7585 flow [2024-06-20 17:48:06,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-20 17:48:06,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-20 17:48:06,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 297 transitions. [2024-06-20 17:48:06,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5303571428571429 [2024-06-20 17:48:06,235 INFO L175 Difference]: Start difference. First operand has 359 places, 507 transitions, 6390 flow. Second operand 14 states and 297 transitions. [2024-06-20 17:48:06,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 538 transitions, 7585 flow [2024-06-20 17:48:07,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 538 transitions, 7387 flow, removed 0 selfloop flow, removed 13 redundant places. [2024-06-20 17:48:07,131 INFO L231 Difference]: Finished difference. Result has 360 places, 510 transitions, 6892 flow [2024-06-20 17:48:07,131 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6192, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=507, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=309, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=6892, PETRI_PLACES=360, PETRI_TRANSITIONS=510} [2024-06-20 17:48:07,132 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 319 predicate places. [2024-06-20 17:48:07,132 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 510 transitions, 6892 flow [2024-06-20 17:48:07,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.6) internal successors, (156), 10 states have internal predecessors, (156), 0 states have call successors, (0), 0 states 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 17:48:07,132 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:48:07,132 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:48:07,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-20 17:48:07,133 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:48:07,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:48:07,133 INFO L85 PathProgramCache]: Analyzing trace with hash 1005420848, now seen corresponding path program 1 times [2024-06-20 17:48:07,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:48:07,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611559671] [2024-06-20 17:48:07,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:48:07,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:48:07,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:48:07,537 INFO 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 17:48:07,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:48:07,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611559671] [2024-06-20 17:48:07,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611559671] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:48:07,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:48:07,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:48:07,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774027902] [2024-06-20 17:48:07,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:48:07,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:48:07,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:48:07,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:48:07,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:48:07,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:48:07,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 510 transitions, 6892 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:48:07,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:48:07,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:48:07,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:48:08,426 INFO L124 PetriNetUnfolderBase]: 2189/3719 cut-off events. [2024-06-20 17:48:08,427 INFO L125 PetriNetUnfolderBase]: For 280666/280674 co-relation queries the response was YES. [2024-06-20 17:48:08,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27066 conditions, 3719 events. 2189/3719 cut-off events. For 280666/280674 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 23317 event pairs, 320 based on Foata normal form. 14/3725 useless extension candidates. Maximal degree in co-relation 26908. Up to 2108 conditions per place. [2024-06-20 17:48:08,472 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 412 selfloop transitions, 134 changer transitions 0/553 dead transitions. [2024-06-20 17:48:08,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 553 transitions, 8558 flow [2024-06-20 17:48:08,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:48:08,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:48:08,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-20 17:48:08,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.61875 [2024-06-20 17:48:08,473 INFO L175 Difference]: Start difference. First operand has 360 places, 510 transitions, 6892 flow. Second operand 8 states and 198 transitions. [2024-06-20 17:48:08,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 553 transitions, 8558 flow [2024-06-20 17:48:09,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 553 transitions, 7880 flow, removed 29 selfloop flow, removed 12 redundant places. [2024-06-20 17:48:09,767 INFO L231 Difference]: Finished difference. Result has 356 places, 513 transitions, 6542 flow [2024-06-20 17:48:09,768 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6214, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=510, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6542, PETRI_PLACES=356, PETRI_TRANSITIONS=513} [2024-06-20 17:48:09,768 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 315 predicate places. [2024-06-20 17:48:09,768 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 513 transitions, 6542 flow [2024-06-20 17:48:09,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:48:09,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:48:09,769 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:48:09,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-20 17:48:09,769 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:48:09,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:48:09,769 INFO L85 PathProgramCache]: Analyzing trace with hash 1527871854, now seen corresponding path program 1 times [2024-06-20 17:48:09,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:48:09,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104378151] [2024-06-20 17:48:09,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:48:09,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:48:09,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:48:10,144 INFO 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 17:48:10,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:48:10,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104378151] [2024-06-20 17:48:10,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104378151] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:48:10,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:48:10,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:48:10,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058756632] [2024-06-20 17:48:10,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:48:10,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:48:10,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:48:10,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:48:10,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:48:10,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:48:10,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 513 transitions, 6542 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:48:10,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:48:10,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:48:10,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:48:11,054 INFO L124 PetriNetUnfolderBase]: 2309/3918 cut-off events. [2024-06-20 17:48:11,054 INFO L125 PetriNetUnfolderBase]: For 346214/346224 co-relation queries the response was YES. [2024-06-20 17:48:11,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29552 conditions, 3918 events. 2309/3918 cut-off events. For 346214/346224 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 24788 event pairs, 333 based on Foata normal form. 16/3933 useless extension candidates. Maximal degree in co-relation 29393. Up to 2740 conditions per place. [2024-06-20 17:48:11,117 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 427 selfloop transitions, 124 changer transitions 0/558 dead transitions. [2024-06-20 17:48:11,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 558 transitions, 8276 flow [2024-06-20 17:48:11,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:48:11,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:48:11,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 233 transitions. [2024-06-20 17:48:11,118 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5825 [2024-06-20 17:48:11,118 INFO L175 Difference]: Start difference. First operand has 356 places, 513 transitions, 6542 flow. Second operand 10 states and 233 transitions. [2024-06-20 17:48:11,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 558 transitions, 8276 flow [2024-06-20 17:48:12,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 558 transitions, 8120 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-20 17:48:12,407 INFO L231 Difference]: Finished difference. Result has 364 places, 518 transitions, 6727 flow [2024-06-20 17:48:12,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6388, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=513, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6727, PETRI_PLACES=364, PETRI_TRANSITIONS=518} [2024-06-20 17:48:12,408 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 323 predicate places. [2024-06-20 17:48:12,408 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 518 transitions, 6727 flow [2024-06-20 17:48:12,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:48:12,408 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:48:12,408 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:48:12,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-20 17:48:12,409 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:48:12,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:48:12,409 INFO L85 PathProgramCache]: Analyzing trace with hash 200416090, now seen corresponding path program 2 times [2024-06-20 17:48:12,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:48:12,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394335103] [2024-06-20 17:48:12,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:48:12,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:48:12,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:48:12,765 INFO 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 17:48:12,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:48:12,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394335103] [2024-06-20 17:48:12,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394335103] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:48:12,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:48:12,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:48:12,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669103972] [2024-06-20 17:48:12,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:48:12,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:48:12,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:48:12,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:48:12,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:48:12,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:48:12,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 518 transitions, 6727 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:48:12,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:48:12,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:48:12,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:48:13,551 INFO L124 PetriNetUnfolderBase]: 2329/3954 cut-off events. [2024-06-20 17:48:13,551 INFO L125 PetriNetUnfolderBase]: For 355475/355485 co-relation queries the response was YES. [2024-06-20 17:48:13,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30113 conditions, 3954 events. 2329/3954 cut-off events. For 355475/355485 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 25102 event pairs, 321 based on Foata normal form. 16/3969 useless extension candidates. Maximal degree in co-relation 29951. Up to 3240 conditions per place. [2024-06-20 17:48:13,608 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 474 selfloop transitions, 68 changer transitions 0/549 dead transitions. [2024-06-20 17:48:13,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 549 transitions, 7917 flow [2024-06-20 17:48:13,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:48:13,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:48:13,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-20 17:48:13,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.58125 [2024-06-20 17:48:13,609 INFO L175 Difference]: Start difference. First operand has 364 places, 518 transitions, 6727 flow. Second operand 8 states and 186 transitions. [2024-06-20 17:48:13,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 549 transitions, 7917 flow [2024-06-20 17:48:14,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 549 transitions, 7781 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-20 17:48:14,908 INFO L231 Difference]: Finished difference. Result has 368 places, 519 transitions, 6747 flow [2024-06-20 17:48:14,908 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6591, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=450, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6747, PETRI_PLACES=368, PETRI_TRANSITIONS=519} [2024-06-20 17:48:14,909 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 327 predicate places. [2024-06-20 17:48:14,909 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 519 transitions, 6747 flow [2024-06-20 17:48:14,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:48:14,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:48:14,909 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:48:14,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-20 17:48:14,909 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:48:14,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:48:14,910 INFO L85 PathProgramCache]: Analyzing trace with hash 1705240524, now seen corresponding path program 2 times [2024-06-20 17:48:14,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:48:14,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88299680] [2024-06-20 17:48:14,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:48:14,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:48:14,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:48:15,255 INFO 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 17:48:15,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:48:15,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88299680] [2024-06-20 17:48:15,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88299680] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:48:15,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:48:15,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:48:15,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700440710] [2024-06-20 17:48:15,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:48:15,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:48:15,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:48:15,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:48:15,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:48:15,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:48:15,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 519 transitions, 6747 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:48:15,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:48:15,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:48:15,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:48:16,159 INFO L124 PetriNetUnfolderBase]: 2439/4128 cut-off events. [2024-06-20 17:48:16,159 INFO L125 PetriNetUnfolderBase]: For 412036/412046 co-relation queries the response was YES. [2024-06-20 17:48:16,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32580 conditions, 4128 events. 2439/4128 cut-off events. For 412036/412046 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 26296 event pairs, 358 based on Foata normal form. 16/4143 useless extension candidates. Maximal degree in co-relation 32416. Up to 2832 conditions per place. [2024-06-20 17:48:16,214 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 429 selfloop transitions, 128 changer transitions 0/564 dead transitions. [2024-06-20 17:48:16,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 564 transitions, 8523 flow [2024-06-20 17:48:16,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:48:16,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:48:16,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 229 transitions. [2024-06-20 17:48:16,215 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5725 [2024-06-20 17:48:16,215 INFO L175 Difference]: Start difference. First operand has 368 places, 519 transitions, 6747 flow. Second operand 10 states and 229 transitions. [2024-06-20 17:48:16,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 564 transitions, 8523 flow [2024-06-20 17:48:17,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 564 transitions, 8363 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-20 17:48:17,429 INFO L231 Difference]: Finished difference. Result has 372 places, 528 transitions, 7002 flow [2024-06-20 17:48:17,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6601, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=519, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=397, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7002, PETRI_PLACES=372, PETRI_TRANSITIONS=528} [2024-06-20 17:48:17,430 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 331 predicate places. [2024-06-20 17:48:17,430 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 528 transitions, 7002 flow [2024-06-20 17:48:17,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:48:17,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:48:17,430 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:48:17,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-20 17:48:17,431 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:48:17,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:48:17,431 INFO L85 PathProgramCache]: Analyzing trace with hash 1532513484, now seen corresponding path program 3 times [2024-06-20 17:48:17,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:48:17,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97003576] [2024-06-20 17:48:17,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:48:17,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:48:17,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:48:17,782 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 17:48:17,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:48:17,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97003576] [2024-06-20 17:48:17,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97003576] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:48:17,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:48:17,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:48:17,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024300728] [2024-06-20 17:48:17,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:48:17,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:48:17,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:48:17,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:48:17,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:48:17,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:48:17,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 528 transitions, 7002 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:48:17,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:48:17,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:48:17,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:48:18,634 INFO L124 PetriNetUnfolderBase]: 2426/4117 cut-off events. [2024-06-20 17:48:18,634 INFO L125 PetriNetUnfolderBase]: For 396541/396551 co-relation queries the response was YES. [2024-06-20 17:48:18,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32207 conditions, 4117 events. 2426/4117 cut-off events. For 396541/396551 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 26367 event pairs, 348 based on Foata normal form. 16/4132 useless extension candidates. Maximal degree in co-relation 32042. Up to 2826 conditions per place. [2024-06-20 17:48:18,693 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 434 selfloop transitions, 125 changer transitions 0/566 dead transitions. [2024-06-20 17:48:18,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 566 transitions, 8676 flow [2024-06-20 17:48:18,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:48:18,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:48:18,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 231 transitions. [2024-06-20 17:48:18,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5775 [2024-06-20 17:48:18,694 INFO L175 Difference]: Start difference. First operand has 372 places, 528 transitions, 7002 flow. Second operand 10 states and 231 transitions. [2024-06-20 17:48:18,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 566 transitions, 8676 flow [2024-06-20 17:48:20,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 566 transitions, 8473 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-20 17:48:20,017 INFO L231 Difference]: Finished difference. Result has 377 places, 528 transitions, 7053 flow [2024-06-20 17:48:20,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6799, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=528, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=403, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7053, PETRI_PLACES=377, PETRI_TRANSITIONS=528} [2024-06-20 17:48:20,017 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 336 predicate places. [2024-06-20 17:48:20,017 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 528 transitions, 7053 flow [2024-06-20 17:48:20,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:48:20,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:48:20,018 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:48:20,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-20 17:48:20,018 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:48:20,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:48:20,018 INFO L85 PathProgramCache]: Analyzing trace with hash 1705003188, now seen corresponding path program 3 times [2024-06-20 17:48:20,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:48:20,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180677158] [2024-06-20 17:48:20,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:48:20,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:48:20,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:48:20,379 INFO 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 17:48:20,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:48:20,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180677158] [2024-06-20 17:48:20,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180677158] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:48:20,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:48:20,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:48:20,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514801623] [2024-06-20 17:48:20,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:48:20,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:48:20,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:48:20,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:48:20,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:48:20,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:48:20,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 528 transitions, 7053 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:48:20,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:48:20,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:48:20,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:48:21,275 INFO L124 PetriNetUnfolderBase]: 2479/4208 cut-off events. [2024-06-20 17:48:21,276 INFO L125 PetriNetUnfolderBase]: For 430957/430967 co-relation queries the response was YES. [2024-06-20 17:48:21,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33345 conditions, 4208 events. 2479/4208 cut-off events. For 430957/430967 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 26995 event pairs, 340 based on Foata normal form. 16/4223 useless extension candidates. Maximal degree in co-relation 33179. Up to 3397 conditions per place. [2024-06-20 17:48:21,336 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 479 selfloop transitions, 76 changer transitions 0/562 dead transitions. [2024-06-20 17:48:21,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 562 transitions, 8493 flow [2024-06-20 17:48:21,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:48:21,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:48:21,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 203 transitions. [2024-06-20 17:48:21,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5638888888888889 [2024-06-20 17:48:21,337 INFO L175 Difference]: Start difference. First operand has 377 places, 528 transitions, 7053 flow. Second operand 9 states and 203 transitions. [2024-06-20 17:48:21,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 562 transitions, 8493 flow [2024-06-20 17:48:22,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 562 transitions, 8253 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-20 17:48:22,819 INFO L231 Difference]: Finished difference. Result has 381 places, 530 transitions, 7012 flow [2024-06-20 17:48:22,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6813, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=528, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=452, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7012, PETRI_PLACES=381, PETRI_TRANSITIONS=530} [2024-06-20 17:48:22,820 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 340 predicate places. [2024-06-20 17:48:22,820 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 530 transitions, 7012 flow [2024-06-20 17:48:22,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:48:22,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:48:22,820 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:48:22,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-20 17:48:22,821 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:48:22,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:48:22,821 INFO L85 PathProgramCache]: Analyzing trace with hash 740101138, now seen corresponding path program 4 times [2024-06-20 17:48:22,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:48:22,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660832342] [2024-06-20 17:48:22,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:48:22,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:48:22,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:48:23,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:48:23,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:48:23,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660832342] [2024-06-20 17:48:23,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660832342] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:48:23,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:48:23,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:48:23,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423326506] [2024-06-20 17:48:23,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:48:23,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:48:23,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:48:23,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:48:23,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:48:23,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:48:23,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 530 transitions, 7012 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:48:23,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:48:23,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:48:23,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:48:24,067 INFO L124 PetriNetUnfolderBase]: 2611/4411 cut-off events. [2024-06-20 17:48:24,067 INFO L125 PetriNetUnfolderBase]: For 528188/528196 co-relation queries the response was YES. [2024-06-20 17:48:24,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36562 conditions, 4411 events. 2611/4411 cut-off events. For 528188/528196 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 28457 event pairs, 552 based on Foata normal form. 14/4419 useless extension candidates. Maximal degree in co-relation 36394. Up to 3321 conditions per place. [2024-06-20 17:48:24,136 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 435 selfloop transitions, 131 changer transitions 0/573 dead transitions. [2024-06-20 17:48:24,136 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 573 transitions, 8767 flow [2024-06-20 17:48:24,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:48:24,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:48:24,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-20 17:48:24,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.61875 [2024-06-20 17:48:24,145 INFO L175 Difference]: Start difference. First operand has 381 places, 530 transitions, 7012 flow. Second operand 8 states and 198 transitions. [2024-06-20 17:48:24,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 573 transitions, 8767 flow [2024-06-20 17:48:26,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 573 transitions, 8594 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-20 17:48:26,193 INFO L231 Difference]: Finished difference. Result has 383 places, 534 transitions, 7196 flow [2024-06-20 17:48:26,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6844, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7196, PETRI_PLACES=383, PETRI_TRANSITIONS=534} [2024-06-20 17:48:26,193 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 342 predicate places. [2024-06-20 17:48:26,193 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 534 transitions, 7196 flow [2024-06-20 17:48:26,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:48:26,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:48:26,194 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:48:26,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-20 17:48:26,194 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:48:26,194 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:48:26,194 INFO L85 PathProgramCache]: Analyzing trace with hash 740221108, now seen corresponding path program 5 times [2024-06-20 17:48:26,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:48:26,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288002877] [2024-06-20 17:48:26,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:48:26,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:48:26,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:48:26,564 INFO 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 17:48:26,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:48:26,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288002877] [2024-06-20 17:48:26,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288002877] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:48:26,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:48:26,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:48:26,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728372537] [2024-06-20 17:48:26,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:48:26,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:48:26,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:48:26,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:48:26,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:48:26,648 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:48:26,648 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 534 transitions, 7196 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:48:26,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:48:26,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:48:26,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:48:27,495 INFO L124 PetriNetUnfolderBase]: 2598/4390 cut-off events. [2024-06-20 17:48:27,495 INFO L125 PetriNetUnfolderBase]: For 513609/513619 co-relation queries the response was YES. [2024-06-20 17:48:27,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36069 conditions, 4390 events. 2598/4390 cut-off events. For 513609/513619 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 28361 event pairs, 566 based on Foata normal form. 16/4394 useless extension candidates. Maximal degree in co-relation 35901. Up to 3791 conditions per place. [2024-06-20 17:48:27,557 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 498 selfloop transitions, 58 changer transitions 0/563 dead transitions. [2024-06-20 17:48:27,557 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 563 transitions, 8398 flow [2024-06-20 17:48:27,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:48:27,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:48:27,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-20 17:48:27,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.578125 [2024-06-20 17:48:27,559 INFO L175 Difference]: Start difference. First operand has 383 places, 534 transitions, 7196 flow. Second operand 8 states and 185 transitions. [2024-06-20 17:48:27,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 563 transitions, 8398 flow [2024-06-20 17:48:29,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 563 transitions, 8247 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-20 17:48:29,685 INFO L231 Difference]: Finished difference. Result has 388 places, 534 transitions, 7165 flow [2024-06-20 17:48:29,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7045, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=534, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=476, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7165, PETRI_PLACES=388, PETRI_TRANSITIONS=534} [2024-06-20 17:48:29,686 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 347 predicate places. [2024-06-20 17:48:29,686 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 534 transitions, 7165 flow [2024-06-20 17:48:29,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:48:29,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:48:29,686 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:48:29,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-20 17:48:29,687 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:48:29,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:48:29,687 INFO L85 PathProgramCache]: Analyzing trace with hash 740221294, now seen corresponding path program 4 times [2024-06-20 17:48:29,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:48:29,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828698677] [2024-06-20 17:48:29,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:48:29,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:48:29,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:48:30,024 INFO 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 17:48:30,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:48:30,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828698677] [2024-06-20 17:48:30,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828698677] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:48:30,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:48:30,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:48:30,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019035679] [2024-06-20 17:48:30,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:48:30,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:48:30,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:48:30,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:48:30,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:48:30,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:48:30,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 534 transitions, 7165 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:48:30,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:48:30,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:48:30,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:48:31,080 INFO L124 PetriNetUnfolderBase]: 2664/4494 cut-off events. [2024-06-20 17:48:31,080 INFO L125 PetriNetUnfolderBase]: For 558529/558539 co-relation queries the response was YES. [2024-06-20 17:48:31,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37697 conditions, 4494 events. 2664/4494 cut-off events. For 558529/558539 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 29090 event pairs, 584 based on Foata normal form. 16/4500 useless extension candidates. Maximal degree in co-relation 37527. Up to 3755 conditions per place. [2024-06-20 17:48:31,139 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 450 selfloop transitions, 115 changer transitions 0/572 dead transitions. [2024-06-20 17:48:31,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 572 transitions, 8680 flow [2024-06-20 17:48:31,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 17:48:31,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 17:48:31,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 246 transitions. [2024-06-20 17:48:31,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5590909090909091 [2024-06-20 17:48:31,140 INFO L175 Difference]: Start difference. First operand has 388 places, 534 transitions, 7165 flow. Second operand 11 states and 246 transitions. [2024-06-20 17:48:31,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 572 transitions, 8680 flow [2024-06-20 17:48:33,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 572 transitions, 8562 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-20 17:48:33,138 INFO L231 Difference]: Finished difference. Result has 395 places, 536 transitions, 7352 flow [2024-06-20 17:48:33,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7047, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=534, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7352, PETRI_PLACES=395, PETRI_TRANSITIONS=536} [2024-06-20 17:48:33,139 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 354 predicate places. [2024-06-20 17:48:33,139 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 536 transitions, 7352 flow [2024-06-20 17:48:33,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:48:33,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:48:33,139 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:48:33,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-20 17:48:33,140 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:48:33,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:48:33,140 INFO L85 PathProgramCache]: Analyzing trace with hash 882204208, now seen corresponding path program 6 times [2024-06-20 17:48:33,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:48:33,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877941536] [2024-06-20 17:48:33,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:48:33,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:48:33,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:48:33,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:48:33,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:48:33,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877941536] [2024-06-20 17:48:33,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877941536] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:48:33,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:48:33,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:48:33,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997243816] [2024-06-20 17:48:33,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:48:33,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:48:33,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:48:33,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:48:33,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:48:33,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:48:33,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 536 transitions, 7352 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:48:33,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:48:33,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:48:33,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:48:34,418 INFO L124 PetriNetUnfolderBase]: 2692/4548 cut-off events. [2024-06-20 17:48:34,418 INFO L125 PetriNetUnfolderBase]: For 581261/581269 co-relation queries the response was YES. [2024-06-20 17:48:34,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38341 conditions, 4548 events. 2692/4548 cut-off events. For 581261/581269 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 29532 event pairs, 602 based on Foata normal form. 16/4560 useless extension candidates. Maximal degree in co-relation 38169. Up to 3631 conditions per place. [2024-06-20 17:48:34,488 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 438 selfloop transitions, 128 changer transitions 0/573 dead transitions. [2024-06-20 17:48:34,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 573 transitions, 8864 flow [2024-06-20 17:48:34,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:48:34,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:48:34,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-20 17:48:34,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.609375 [2024-06-20 17:48:34,490 INFO L175 Difference]: Start difference. First operand has 395 places, 536 transitions, 7352 flow. Second operand 8 states and 195 transitions. [2024-06-20 17:48:34,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 573 transitions, 8864 flow [2024-06-20 17:48:36,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 573 transitions, 8648 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-20 17:48:37,006 INFO L231 Difference]: Finished difference. Result has 395 places, 537 transitions, 7416 flow [2024-06-20 17:48:37,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7136, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=409, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7416, PETRI_PLACES=395, PETRI_TRANSITIONS=537} [2024-06-20 17:48:37,006 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 354 predicate places. [2024-06-20 17:48:37,007 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 537 transitions, 7416 flow [2024-06-20 17:48:37,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:48:37,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:48:37,007 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:48:37,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-20 17:48:37,007 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:48:37,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:48:37,008 INFO L85 PathProgramCache]: Analyzing trace with hash 890775088, now seen corresponding path program 7 times [2024-06-20 17:48:37,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:48:37,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287211294] [2024-06-20 17:48:37,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:48:37,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:48:37,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:48:37,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:48:37,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:48:37,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287211294] [2024-06-20 17:48:37,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287211294] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:48:37,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:48:37,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:48:37,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826538193] [2024-06-20 17:48:37,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:48:37,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:48:37,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:48:37,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:48:37,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:48:37,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:48:37,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 537 transitions, 7416 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:48:37,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:48:37,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:48:37,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:48:38,312 INFO L124 PetriNetUnfolderBase]: 2720/4598 cut-off events. [2024-06-20 17:48:38,312 INFO L125 PetriNetUnfolderBase]: For 593688/593696 co-relation queries the response was YES. [2024-06-20 17:48:38,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38873 conditions, 4598 events. 2720/4598 cut-off events. For 593688/593696 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 29897 event pairs, 634 based on Foata normal form. 16/4612 useless extension candidates. Maximal degree in co-relation 38700. Up to 3841 conditions per place. [2024-06-20 17:48:38,380 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 432 selfloop transitions, 127 changer transitions 0/566 dead transitions. [2024-06-20 17:48:38,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 566 transitions, 8666 flow [2024-06-20 17:48:38,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:48:38,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:48:38,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-20 17:48:38,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5875 [2024-06-20 17:48:38,381 INFO L175 Difference]: Start difference. First operand has 395 places, 537 transitions, 7416 flow. Second operand 8 states and 188 transitions. [2024-06-20 17:48:38,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 566 transitions, 8666 flow [2024-06-20 17:48:40,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 566 transitions, 8391 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-20 17:48:40,670 INFO L231 Difference]: Finished difference. Result has 397 places, 538 transitions, 7424 flow [2024-06-20 17:48:40,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7145, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=537, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=410, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7424, PETRI_PLACES=397, PETRI_TRANSITIONS=538} [2024-06-20 17:48:40,671 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 356 predicate places. [2024-06-20 17:48:40,671 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 538 transitions, 7424 flow [2024-06-20 17:48:40,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:48:40,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:48:40,671 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:48:40,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-20 17:48:40,672 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:48:40,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:48:40,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1006066258, now seen corresponding path program 8 times [2024-06-20 17:48:40,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:48:40,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755983202] [2024-06-20 17:48:40,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:48:40,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:48:40,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:48:41,094 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 17:48:41,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:48:41,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755983202] [2024-06-20 17:48:41,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755983202] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:48:41,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:48:41,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:48:41,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109014892] [2024-06-20 17:48:41,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:48:41,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:48:41,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:48:41,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:48:41,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:48:41,161 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:48:41,161 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 538 transitions, 7424 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:48:41,161 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:48:41,161 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:48:41,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:48:42,081 INFO L124 PetriNetUnfolderBase]: 2748/4643 cut-off events. [2024-06-20 17:48:42,082 INFO L125 PetriNetUnfolderBase]: For 605415/605425 co-relation queries the response was YES. [2024-06-20 17:48:42,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39206 conditions, 4643 events. 2748/4643 cut-off events. For 605415/605425 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 30243 event pairs, 615 based on Foata normal form. 18/4660 useless extension candidates. Maximal degree in co-relation 39032. Up to 4050 conditions per place. [2024-06-20 17:48:42,151 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 501 selfloop transitions, 56 changer transitions 0/564 dead transitions. [2024-06-20 17:48:42,151 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 564 transitions, 8660 flow [2024-06-20 17:48:42,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:48:42,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:48:42,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-20 17:48:42,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.56875 [2024-06-20 17:48:42,153 INFO L175 Difference]: Start difference. First operand has 397 places, 538 transitions, 7424 flow. Second operand 8 states and 182 transitions. [2024-06-20 17:48:42,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 564 transitions, 8660 flow [2024-06-20 17:48:44,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 564 transitions, 8405 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-20 17:48:44,388 INFO L231 Difference]: Finished difference. Result has 399 places, 539 transitions, 7308 flow [2024-06-20 17:48:44,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7169, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=482, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7308, PETRI_PLACES=399, PETRI_TRANSITIONS=539} [2024-06-20 17:48:44,388 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 358 predicate places. [2024-06-20 17:48:44,388 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 539 transitions, 7308 flow [2024-06-20 17:48:44,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:48:44,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:48:44,389 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:48:44,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-20 17:48:44,389 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:48:44,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:48:44,389 INFO L85 PathProgramCache]: Analyzing trace with hash 747630418, now seen corresponding path program 9 times [2024-06-20 17:48:44,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:48:44,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214357280] [2024-06-20 17:48:44,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:48:44,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:48:44,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:48:44,740 INFO 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 17:48:44,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:48:44,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214357280] [2024-06-20 17:48:44,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214357280] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:48:44,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:48:44,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:48:44,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459617352] [2024-06-20 17:48:44,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:48:44,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:48:44,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:48:44,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:48:44,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:48:44,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:48:44,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 539 transitions, 7308 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:48:44,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:48:44,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:48:44,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:48:45,715 INFO L124 PetriNetUnfolderBase]: 2776/4679 cut-off events. [2024-06-20 17:48:45,715 INFO L125 PetriNetUnfolderBase]: For 607447/607457 co-relation queries the response was YES. [2024-06-20 17:48:45,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39409 conditions, 4679 events. 2776/4679 cut-off events. For 607447/607457 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 30416 event pairs, 611 based on Foata normal form. 16/4694 useless extension candidates. Maximal degree in co-relation 39234. Up to 4064 conditions per place. [2024-06-20 17:48:45,784 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 505 selfloop transitions, 59 changer transitions 0/571 dead transitions. [2024-06-20 17:48:45,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 571 transitions, 8609 flow [2024-06-20 17:48:45,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:48:45,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:48:45,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 202 transitions. [2024-06-20 17:48:45,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5611111111111111 [2024-06-20 17:48:45,785 INFO L175 Difference]: Start difference. First operand has 399 places, 539 transitions, 7308 flow. Second operand 9 states and 202 transitions. [2024-06-20 17:48:45,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 571 transitions, 8609 flow [2024-06-20 17:48:48,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 571 transitions, 8494 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-20 17:48:48,204 INFO L231 Difference]: Finished difference. Result has 403 places, 542 transitions, 7370 flow [2024-06-20 17:48:48,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7193, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=539, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=480, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7370, PETRI_PLACES=403, PETRI_TRANSITIONS=542} [2024-06-20 17:48:48,205 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 362 predicate places. [2024-06-20 17:48:48,205 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 542 transitions, 7370 flow [2024-06-20 17:48:48,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:48:48,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:48:48,205 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:48:48,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-20 17:48:48,206 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:48:48,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:48:48,206 INFO L85 PathProgramCache]: Analyzing trace with hash 1006245004, now seen corresponding path program 5 times [2024-06-20 17:48:48,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:48:48,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813808892] [2024-06-20 17:48:48,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:48:48,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:48:48,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:48:48,568 INFO 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 17:48:48,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:48:48,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813808892] [2024-06-20 17:48:48,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813808892] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:48:48,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:48:48,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:48:48,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452413598] [2024-06-20 17:48:48,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:48:48,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:48:48,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:48:48,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:48:48,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:48:48,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:48:48,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 542 transitions, 7370 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:48:48,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:48:48,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:48:48,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:48:49,645 INFO L124 PetriNetUnfolderBase]: 2804/4735 cut-off events. [2024-06-20 17:48:49,646 INFO L125 PetriNetUnfolderBase]: For 629284/629294 co-relation queries the response was YES. [2024-06-20 17:48:49,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39941 conditions, 4735 events. 2804/4735 cut-off events. For 629284/629294 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 30968 event pairs, 625 based on Foata normal form. 18/4752 useless extension candidates. Maximal degree in co-relation 39764. Up to 4077 conditions per place. [2024-06-20 17:48:49,713 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 454 selfloop transitions, 110 changer transitions 0/571 dead transitions. [2024-06-20 17:48:49,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 571 transitions, 8635 flow [2024-06-20 17:48:49,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 17:48:49,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 17:48:49,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 239 transitions. [2024-06-20 17:48:49,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5431818181818182 [2024-06-20 17:48:49,715 INFO L175 Difference]: Start difference. First operand has 403 places, 542 transitions, 7370 flow. Second operand 11 states and 239 transitions. [2024-06-20 17:48:49,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 571 transitions, 8635 flow [2024-06-20 17:48:52,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 571 transitions, 8515 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-20 17:48:52,095 INFO L231 Difference]: Finished difference. Result has 408 places, 543 transitions, 7504 flow [2024-06-20 17:48:52,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7250, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=542, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7504, PETRI_PLACES=408, PETRI_TRANSITIONS=543} [2024-06-20 17:48:52,096 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 367 predicate places. [2024-06-20 17:48:52,096 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 543 transitions, 7504 flow [2024-06-20 17:48:52,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:48:52,096 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:48:52,096 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:48:52,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-20 17:48:52,097 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:48:52,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:48:52,097 INFO L85 PathProgramCache]: Analyzing trace with hash -958820182, now seen corresponding path program 6 times [2024-06-20 17:48:52,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:48:52,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862965652] [2024-06-20 17:48:52,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:48:52,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:48:52,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:48:52,454 INFO 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 17:48:52,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:48:52,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862965652] [2024-06-20 17:48:52,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862965652] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:48:52,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:48:52,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:48:52,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924244498] [2024-06-20 17:48:52,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:48:52,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:48:52,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:48:52,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:48:52,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:48:52,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:48:52,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 543 transitions, 7504 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:48:52,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:48:52,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:48:52,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:48:53,476 INFO L124 PetriNetUnfolderBase]: 2824/4757 cut-off events. [2024-06-20 17:48:53,476 INFO L125 PetriNetUnfolderBase]: For 633349/633359 co-relation queries the response was YES. [2024-06-20 17:48:53,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40396 conditions, 4757 events. 2824/4757 cut-off events. For 633349/633359 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 31050 event pairs, 619 based on Foata normal form. 16/4770 useless extension candidates. Maximal degree in co-relation 40218. Up to 4079 conditions per place. [2024-06-20 17:48:53,546 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 456 selfloop transitions, 113 changer transitions 0/576 dead transitions. [2024-06-20 17:48:53,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 576 transitions, 8811 flow [2024-06-20 17:48:53,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 17:48:53,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 17:48:53,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 259 transitions. [2024-06-20 17:48:53,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5395833333333333 [2024-06-20 17:48:53,547 INFO L175 Difference]: Start difference. First operand has 408 places, 543 transitions, 7504 flow. Second operand 12 states and 259 transitions. [2024-06-20 17:48:53,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 576 transitions, 8811 flow [2024-06-20 17:48:55,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 576 transitions, 8584 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-20 17:48:55,963 INFO L231 Difference]: Finished difference. Result has 411 places, 544 transitions, 7538 flow [2024-06-20 17:48:55,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7277, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=543, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7538, PETRI_PLACES=411, PETRI_TRANSITIONS=544} [2024-06-20 17:48:55,963 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 370 predicate places. [2024-06-20 17:48:55,963 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 544 transitions, 7538 flow [2024-06-20 17:48:55,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:48:55,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:48:55,964 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:48:55,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-20 17:48:55,964 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:48:55,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:48:55,964 INFO L85 PathProgramCache]: Analyzing trace with hash -343951476, now seen corresponding path program 7 times [2024-06-20 17:48:55,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:48:55,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357662656] [2024-06-20 17:48:55,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:48:55,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:48:55,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:48:56,323 INFO 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 17:48:56,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:48:56,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357662656] [2024-06-20 17:48:56,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357662656] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:48:56,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:48:56,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:48:56,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423082052] [2024-06-20 17:48:56,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:48:56,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:48:56,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:48:56,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:48:56,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:48:56,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:48:56,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 544 transitions, 7538 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:48:56,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:48:56,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:48:56,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:48:57,371 INFO L124 PetriNetUnfolderBase]: 2852/4803 cut-off events. [2024-06-20 17:48:57,371 INFO L125 PetriNetUnfolderBase]: For 657338/657348 co-relation queries the response was YES. [2024-06-20 17:48:57,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40891 conditions, 4803 events. 2852/4803 cut-off events. For 657338/657348 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 31378 event pairs, 631 based on Foata normal form. 18/4820 useless extension candidates. Maximal degree in co-relation 40712. Up to 4153 conditions per place. [2024-06-20 17:48:57,445 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 455 selfloop transitions, 107 changer transitions 0/569 dead transitions. [2024-06-20 17:48:57,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 569 transitions, 8793 flow [2024-06-20 17:48:57,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:48:57,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:48:57,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 219 transitions. [2024-06-20 17:48:57,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5475 [2024-06-20 17:48:57,446 INFO L175 Difference]: Start difference. First operand has 411 places, 544 transitions, 7538 flow. Second operand 10 states and 219 transitions. [2024-06-20 17:48:57,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 569 transitions, 8793 flow [2024-06-20 17:48:59,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 569 transitions, 8561 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-20 17:48:59,948 INFO L231 Difference]: Finished difference. Result has 412 places, 545 transitions, 7558 flow [2024-06-20 17:48:59,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7306, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=544, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=437, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7558, PETRI_PLACES=412, PETRI_TRANSITIONS=545} [2024-06-20 17:48:59,948 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 371 predicate places. [2024-06-20 17:48:59,948 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 545 transitions, 7558 flow [2024-06-20 17:48:59,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:48:59,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:48:59,949 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:48:59,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-20 17:48:59,949 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:48:59,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:48:59,949 INFO L85 PathProgramCache]: Analyzing trace with hash -344011926, now seen corresponding path program 8 times [2024-06-20 17:48:59,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:48:59,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518531055] [2024-06-20 17:48:59,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:48:59,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:48:59,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:49:00,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:49:00,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:49:00,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518531055] [2024-06-20 17:49:00,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518531055] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:49:00,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:49:00,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:49:00,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834039322] [2024-06-20 17:49:00,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:49:00,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:49:00,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:49:00,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:49:00,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:49:00,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:49:00,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 545 transitions, 7558 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:49:00,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:49:00,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:49:00,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:49:01,381 INFO L124 PetriNetUnfolderBase]: 2972/4999 cut-off events. [2024-06-20 17:49:01,382 INFO L125 PetriNetUnfolderBase]: For 754772/754782 co-relation queries the response was YES. [2024-06-20 17:49:01,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44131 conditions, 4999 events. 2972/4999 cut-off events. For 754772/754782 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 32874 event pairs, 651 based on Foata normal form. 18/5016 useless extension candidates. Maximal degree in co-relation 43951. Up to 4125 conditions per place. [2024-06-20 17:49:01,461 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 459 selfloop transitions, 111 changer transitions 0/577 dead transitions. [2024-06-20 17:49:01,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 577 transitions, 9141 flow [2024-06-20 17:49:01,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:49:01,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:49:01,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 223 transitions. [2024-06-20 17:49:01,462 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5575 [2024-06-20 17:49:01,462 INFO L175 Difference]: Start difference. First operand has 412 places, 545 transitions, 7558 flow. Second operand 10 states and 223 transitions. [2024-06-20 17:49:01,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 577 transitions, 9141 flow [2024-06-20 17:49:04,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 577 transitions, 8916 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-20 17:49:04,371 INFO L231 Difference]: Finished difference. Result has 415 places, 548 transitions, 7667 flow [2024-06-20 17:49:04,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7333, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=545, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=434, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7667, PETRI_PLACES=415, PETRI_TRANSITIONS=548} [2024-06-20 17:49:04,372 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 374 predicate places. [2024-06-20 17:49:04,372 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 548 transitions, 7667 flow [2024-06-20 17:49:04,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:49:04,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:49:04,372 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:49:04,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-20 17:49:04,372 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:49:04,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:49:04,373 INFO L85 PathProgramCache]: Analyzing trace with hash -657948492, now seen corresponding path program 10 times [2024-06-20 17:49:04,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:49:04,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521805424] [2024-06-20 17:49:04,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:49:04,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:49:04,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:49:04,723 INFO 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 17:49:04,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:49:04,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521805424] [2024-06-20 17:49:04,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521805424] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:49:04,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:49:04,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:49:04,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290901634] [2024-06-20 17:49:04,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:49:04,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:49:04,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:49:04,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:49:04,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:49:04,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:49:04,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 548 transitions, 7667 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:49:04,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:49:04,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:49:04,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:49:05,889 INFO L124 PetriNetUnfolderBase]: 3141/5256 cut-off events. [2024-06-20 17:49:05,889 INFO L125 PetriNetUnfolderBase]: For 882580/882590 co-relation queries the response was YES. [2024-06-20 17:49:05,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48433 conditions, 5256 events. 3141/5256 cut-off events. For 882580/882590 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 34757 event pairs, 694 based on Foata normal form. 16/5261 useless extension candidates. Maximal degree in co-relation 48251. Up to 4421 conditions per place. [2024-06-20 17:49:05,967 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 503 selfloop transitions, 76 changer transitions 0/586 dead transitions. [2024-06-20 17:49:05,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 423 places, 586 transitions, 9308 flow [2024-06-20 17:49:05,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:49:05,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:49:05,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 201 transitions. [2024-06-20 17:49:05,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5583333333333333 [2024-06-20 17:49:05,968 INFO L175 Difference]: Start difference. First operand has 415 places, 548 transitions, 7667 flow. Second operand 9 states and 201 transitions. [2024-06-20 17:49:05,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 423 places, 586 transitions, 9308 flow [2024-06-20 17:49:09,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 586 transitions, 9091 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-20 17:49:09,060 INFO L231 Difference]: Finished difference. Result has 419 places, 556 transitions, 7771 flow [2024-06-20 17:49:09,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7450, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=548, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=472, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7771, PETRI_PLACES=419, PETRI_TRANSITIONS=556} [2024-06-20 17:49:09,060 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 378 predicate places. [2024-06-20 17:49:09,060 INFO L495 AbstractCegarLoop]: Abstraction has has 419 places, 556 transitions, 7771 flow [2024-06-20 17:49:09,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:49:09,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:49:09,061 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:49:09,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-20 17:49:09,061 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:49:09,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:49:09,061 INFO L85 PathProgramCache]: Analyzing trace with hash -657948306, now seen corresponding path program 9 times [2024-06-20 17:49:09,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:49:09,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630116090] [2024-06-20 17:49:09,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:49:09,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:49:09,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:49:09,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:49:09,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:49:09,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630116090] [2024-06-20 17:49:09,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630116090] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:49:09,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:49:09,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:49:09,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306091671] [2024-06-20 17:49:09,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:49:09,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:49:09,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:49:09,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:49:09,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:49:09,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:49:09,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 419 places, 556 transitions, 7771 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:49:09,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:49:09,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:49:09,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:49:10,720 INFO L124 PetriNetUnfolderBase]: 3260/5445 cut-off events. [2024-06-20 17:49:10,720 INFO L125 PetriNetUnfolderBase]: For 998325/998335 co-relation queries the response was YES. [2024-06-20 17:49:10,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52038 conditions, 5445 events. 3260/5445 cut-off events. For 998325/998335 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 36073 event pairs, 718 based on Foata normal form. 16/5454 useless extension candidates. Maximal degree in co-relation 51853. Up to 4344 conditions per place. [2024-06-20 17:49:10,801 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 466 selfloop transitions, 123 changer transitions 0/596 dead transitions. [2024-06-20 17:49:10,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 596 transitions, 9697 flow [2024-06-20 17:49:10,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 17:49:10,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 17:49:10,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 245 transitions. [2024-06-20 17:49:10,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5568181818181818 [2024-06-20 17:49:10,802 INFO L175 Difference]: Start difference. First operand has 419 places, 556 transitions, 7771 flow. Second operand 11 states and 245 transitions. [2024-06-20 17:49:10,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 596 transitions, 9697 flow [2024-06-20 17:49:13,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 596 transitions, 9557 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-20 17:49:13,980 INFO L231 Difference]: Finished difference. Result has 426 places, 562 transitions, 8067 flow [2024-06-20 17:49:13,980 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7631, PETRI_DIFFERENCE_MINUEND_PLACES=414, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=556, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=434, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8067, PETRI_PLACES=426, PETRI_TRANSITIONS=562} [2024-06-20 17:49:13,981 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 385 predicate places. [2024-06-20 17:49:13,981 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 562 transitions, 8067 flow [2024-06-20 17:49:13,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:49:13,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:49:13,981 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:49:13,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-20 17:49:13,981 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:49:13,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:49:13,982 INFO L85 PathProgramCache]: Analyzing trace with hash 235652842, now seen corresponding path program 10 times [2024-06-20 17:49:13,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:49:13,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761711004] [2024-06-20 17:49:13,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:49:13,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:49:13,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:49:14,320 INFO 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 17:49:14,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:49:14,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761711004] [2024-06-20 17:49:14,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761711004] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:49:14,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:49:14,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:49:14,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748590117] [2024-06-20 17:49:14,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:49:14,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:49:14,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:49:14,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:49:14,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:49:14,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:49:14,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 562 transitions, 8067 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:49:14,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:49:14,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:49:14,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:49:15,668 INFO L124 PetriNetUnfolderBase]: 3247/5432 cut-off events. [2024-06-20 17:49:15,669 INFO L125 PetriNetUnfolderBase]: For 986669/986679 co-relation queries the response was YES. [2024-06-20 17:49:15,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51816 conditions, 5432 events. 3247/5432 cut-off events. For 986669/986679 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 36077 event pairs, 708 based on Foata normal form. 16/5439 useless extension candidates. Maximal degree in co-relation 51629. Up to 4338 conditions per place. [2024-06-20 17:49:15,749 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 463 selfloop transitions, 125 changer transitions 0/595 dead transitions. [2024-06-20 17:49:15,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 595 transitions, 9825 flow [2024-06-20 17:49:15,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 17:49:15,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 17:49:15,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 244 transitions. [2024-06-20 17:49:15,750 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5545454545454546 [2024-06-20 17:49:15,750 INFO L175 Difference]: Start difference. First operand has 426 places, 562 transitions, 8067 flow. Second operand 11 states and 244 transitions. [2024-06-20 17:49:15,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 595 transitions, 9825 flow [2024-06-20 17:49:19,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 595 transitions, 9667 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-20 17:49:19,293 INFO L231 Difference]: Finished difference. Result has 431 places, 562 transitions, 8163 flow [2024-06-20 17:49:19,293 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7909, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=562, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=437, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8163, PETRI_PLACES=431, PETRI_TRANSITIONS=562} [2024-06-20 17:49:19,293 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 390 predicate places. [2024-06-20 17:49:19,293 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 562 transitions, 8163 flow [2024-06-20 17:49:19,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:49:19,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:49:19,294 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:49:19,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-20 17:49:19,294 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:49:19,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:49:19,294 INFO L85 PathProgramCache]: Analyzing trace with hash -129943116, now seen corresponding path program 11 times [2024-06-20 17:49:19,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:49:19,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137805922] [2024-06-20 17:49:19,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:49:19,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:49:19,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:49:19,640 INFO 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 17:49:19,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:49:19,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137805922] [2024-06-20 17:49:19,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137805922] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:49:19,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:49:19,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:49:19,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676461256] [2024-06-20 17:49:19,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:49:19,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:49:19,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:49:19,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:49:19,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:49:19,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:49:19,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 562 transitions, 8163 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:49:19,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:49:19,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:49:19,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:49:20,988 INFO L124 PetriNetUnfolderBase]: 3234/5411 cut-off events. [2024-06-20 17:49:20,988 INFO L125 PetriNetUnfolderBase]: For 970426/970436 co-relation queries the response was YES. [2024-06-20 17:49:21,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51403 conditions, 5411 events. 3234/5411 cut-off events. For 970426/970436 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 35918 event pairs, 747 based on Foata normal form. 16/5424 useless extension candidates. Maximal degree in co-relation 51214. Up to 4663 conditions per place. [2024-06-20 17:49:21,068 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 473 selfloop transitions, 112 changer transitions 0/592 dead transitions. [2024-06-20 17:49:21,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 592 transitions, 9679 flow [2024-06-20 17:49:21,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 17:49:21,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 17:49:21,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 258 transitions. [2024-06-20 17:49:21,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5375 [2024-06-20 17:49:21,070 INFO L175 Difference]: Start difference. First operand has 431 places, 562 transitions, 8163 flow. Second operand 12 states and 258 transitions. [2024-06-20 17:49:21,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 592 transitions, 9679 flow [2024-06-20 17:49:24,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 592 transitions, 9430 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-20 17:49:24,504 INFO L231 Difference]: Finished difference. Result has 434 places, 562 transitions, 8142 flow [2024-06-20 17:49:24,504 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7914, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=562, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=450, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8142, PETRI_PLACES=434, PETRI_TRANSITIONS=562} [2024-06-20 17:49:24,505 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 393 predicate places. [2024-06-20 17:49:24,505 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 562 transitions, 8142 flow [2024-06-20 17:49:24,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:49:24,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:49:24,505 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:49:24,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-20 17:49:24,505 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:49:24,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:49:24,506 INFO L85 PathProgramCache]: Analyzing trace with hash -129795432, now seen corresponding path program 11 times [2024-06-20 17:49:24,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:49:24,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572226332] [2024-06-20 17:49:24,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:49:24,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:49:24,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:49:24,844 INFO 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 17:49:24,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:49:24,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572226332] [2024-06-20 17:49:24,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572226332] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:49:24,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:49:24,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:49:24,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255174385] [2024-06-20 17:49:24,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:49:24,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:49:24,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:49:24,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:49:24,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:49:24,898 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:49:24,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 562 transitions, 8142 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:49:24,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:49:24,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:49:24,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:49:26,186 INFO L124 PetriNetUnfolderBase]: 3216/5387 cut-off events. [2024-06-20 17:49:26,187 INFO L125 PetriNetUnfolderBase]: For 953177/953187 co-relation queries the response was YES. [2024-06-20 17:49:26,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50201 conditions, 5387 events. 3216/5387 cut-off events. For 953177/953187 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 35787 event pairs, 747 based on Foata normal form. 18/5404 useless extension candidates. Maximal degree in co-relation 50012. Up to 4769 conditions per place. [2024-06-20 17:49:26,264 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 513 selfloop transitions, 65 changer transitions 0/585 dead transitions. [2024-06-20 17:49:26,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 585 transitions, 9394 flow [2024-06-20 17:49:26,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:49:26,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:49:26,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 197 transitions. [2024-06-20 17:49:26,266 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5472222222222223 [2024-06-20 17:49:26,266 INFO L175 Difference]: Start difference. First operand has 434 places, 562 transitions, 8142 flow. Second operand 9 states and 197 transitions. [2024-06-20 17:49:26,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 585 transitions, 9394 flow [2024-06-20 17:49:29,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 585 transitions, 9163 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-20 17:49:29,646 INFO L231 Difference]: Finished difference. Result has 434 places, 562 transitions, 8046 flow [2024-06-20 17:49:29,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7911, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=562, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=497, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8046, PETRI_PLACES=434, PETRI_TRANSITIONS=562} [2024-06-20 17:49:29,647 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 393 predicate places. [2024-06-20 17:49:29,647 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 562 transitions, 8046 flow [2024-06-20 17:49:29,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:49:29,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:49:29,647 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:49:29,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-20 17:49:29,647 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:49:29,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:49:29,648 INFO L85 PathProgramCache]: Analyzing trace with hash -569056116, now seen corresponding path program 12 times [2024-06-20 17:49:29,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:49:29,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976136935] [2024-06-20 17:49:29,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:49:29,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:49:29,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:49:29,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:49:29,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:49:29,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976136935] [2024-06-20 17:49:29,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976136935] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:49:29,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:49:29,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:49:29,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906571156] [2024-06-20 17:49:29,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:49:29,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:49:29,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:49:29,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:49:29,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:49:30,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:49:30,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 562 transitions, 8046 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:49:30,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:49:30,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:49:30,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:49:31,192 INFO L124 PetriNetUnfolderBase]: 3198/5365 cut-off events. [2024-06-20 17:49:31,193 INFO L125 PetriNetUnfolderBase]: For 921057/921067 co-relation queries the response was YES. [2024-06-20 17:49:31,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49072 conditions, 5365 events. 3198/5365 cut-off events. For 921057/921067 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 35674 event pairs, 741 based on Foata normal form. 18/5382 useless extension candidates. Maximal degree in co-relation 48882. Up to 4691 conditions per place. [2024-06-20 17:49:31,277 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 473 selfloop transitions, 108 changer transitions 0/588 dead transitions. [2024-06-20 17:49:31,278 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 588 transitions, 9312 flow [2024-06-20 17:49:31,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 17:49:31,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 17:49:31,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 255 transitions. [2024-06-20 17:49:31,279 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.53125 [2024-06-20 17:49:31,279 INFO L175 Difference]: Start difference. First operand has 434 places, 562 transitions, 8046 flow. Second operand 12 states and 255 transitions. [2024-06-20 17:49:31,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 588 transitions, 9312 flow [2024-06-20 17:49:34,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 588 transitions, 9165 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-20 17:49:34,996 INFO L231 Difference]: Finished difference. Result has 439 places, 562 transitions, 8120 flow [2024-06-20 17:49:34,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7899, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=562, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=454, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8120, PETRI_PLACES=439, PETRI_TRANSITIONS=562} [2024-06-20 17:49:34,996 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 398 predicate places. [2024-06-20 17:49:34,996 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 562 transitions, 8120 flow [2024-06-20 17:49:34,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:49:34,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:49:34,997 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:49:34,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-20 17:49:34,997 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:49:34,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:49:34,997 INFO L85 PathProgramCache]: Analyzing trace with hash -569382732, now seen corresponding path program 12 times [2024-06-20 17:49:34,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:49:34,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774345615] [2024-06-20 17:49:34,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:49:34,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:49:35,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:49:35,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:49:35,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:49:35,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774345615] [2024-06-20 17:49:35,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774345615] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:49:35,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:49:35,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:49:35,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551673226] [2024-06-20 17:49:35,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:49:35,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:49:35,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:49:35,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:49:35,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:49:35,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:49:35,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 562 transitions, 8120 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:49:35,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:49:35,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:49:35,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:49:36,673 INFO L124 PetriNetUnfolderBase]: 3185/5340 cut-off events. [2024-06-20 17:49:36,674 INFO L125 PetriNetUnfolderBase]: For 888779/888789 co-relation queries the response was YES. [2024-06-20 17:49:36,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48383 conditions, 5340 events. 3185/5340 cut-off events. For 888779/888789 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 35481 event pairs, 724 based on Foata normal form. 16/5353 useless extension candidates. Maximal degree in co-relation 48192. Up to 4694 conditions per place. [2024-06-20 17:49:36,763 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 514 selfloop transitions, 68 changer transitions 0/589 dead transitions. [2024-06-20 17:49:36,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 589 transitions, 9408 flow [2024-06-20 17:49:36,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:49:36,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:49:36,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 217 transitions. [2024-06-20 17:49:36,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5425 [2024-06-20 17:49:36,764 INFO L175 Difference]: Start difference. First operand has 439 places, 562 transitions, 8120 flow. Second operand 10 states and 217 transitions. [2024-06-20 17:49:36,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 589 transitions, 9408 flow [2024-06-20 17:49:40,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 589 transitions, 9193 flow, removed 1 selfloop flow, removed 10 redundant places. [2024-06-20 17:49:40,412 INFO L231 Difference]: Finished difference. Result has 439 places, 562 transitions, 8045 flow [2024-06-20 17:49:40,412 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7905, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=562, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=494, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8045, PETRI_PLACES=439, PETRI_TRANSITIONS=562} [2024-06-20 17:49:40,413 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 398 predicate places. [2024-06-20 17:49:40,413 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 562 transitions, 8045 flow [2024-06-20 17:49:40,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:49:40,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:49:40,413 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:49:40,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-20 17:49:40,413 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:49:40,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:49:40,414 INFO L85 PathProgramCache]: Analyzing trace with hash 1301146394, now seen corresponding path program 13 times [2024-06-20 17:49:40,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:49:40,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518467936] [2024-06-20 17:49:40,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:49:40,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:49:40,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:49:40,792 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 17:49:40,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:49:40,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518467936] [2024-06-20 17:49:40,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518467936] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:49:40,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:49:40,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:49:40,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622186459] [2024-06-20 17:49:40,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:49:40,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:49:40,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:49:40,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:49:40,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:49:40,870 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:49:40,870 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 562 transitions, 8045 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:49:40,870 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:49:40,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:49:40,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:49:42,099 INFO L124 PetriNetUnfolderBase]: 3259/5460 cut-off events. [2024-06-20 17:49:42,099 INFO L125 PetriNetUnfolderBase]: For 966877/966887 co-relation queries the response was YES. [2024-06-20 17:49:42,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50214 conditions, 5460 events. 3259/5460 cut-off events. For 966877/966887 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 36442 event pairs, 746 based on Foata normal form. 18/5477 useless extension candidates. Maximal degree in co-relation 50022. Up to 4523 conditions per place. [2024-06-20 17:49:42,194 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 482 selfloop transitions, 115 changer transitions 0/604 dead transitions. [2024-06-20 17:49:42,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 604 transitions, 9687 flow [2024-06-20 17:49:42,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:49:42,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:49:42,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 216 transitions. [2024-06-20 17:49:42,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-20 17:49:42,196 INFO L175 Difference]: Start difference. First operand has 439 places, 562 transitions, 8045 flow. Second operand 9 states and 216 transitions. [2024-06-20 17:49:42,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 604 transitions, 9687 flow [2024-06-20 17:49:46,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 604 transitions, 9551 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-20 17:49:46,741 INFO L231 Difference]: Finished difference. Result has 441 places, 564 transitions, 8193 flow [2024-06-20 17:49:46,742 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7909, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=562, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=448, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8193, PETRI_PLACES=441, PETRI_TRANSITIONS=564} [2024-06-20 17:49:46,746 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 400 predicate places. [2024-06-20 17:49:46,746 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 564 transitions, 8193 flow [2024-06-20 17:49:46,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:49:46,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:49:46,747 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:49:46,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-20 17:49:46,747 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:49:46,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:49:46,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1309717274, now seen corresponding path program 14 times [2024-06-20 17:49:46,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:49:46,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438772393] [2024-06-20 17:49:46,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:49:46,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:49:46,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:49:47,129 INFO 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 17:49:47,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:49:47,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438772393] [2024-06-20 17:49:47,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438772393] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:49:47,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:49:47,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:49:47,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418710795] [2024-06-20 17:49:47,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:49:47,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:49:47,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:49:47,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:49:47,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:49:47,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:49:47,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 564 transitions, 8193 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:49:47,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:49:47,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:49:47,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:49:48,368 INFO L124 PetriNetUnfolderBase]: 3287/5500 cut-off events. [2024-06-20 17:49:48,368 INFO L125 PetriNetUnfolderBase]: For 986013/986023 co-relation queries the response was YES. [2024-06-20 17:49:48,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50887 conditions, 5500 events. 3287/5500 cut-off events. For 986013/986023 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 36789 event pairs, 764 based on Foata normal form. 18/5517 useless extension candidates. Maximal degree in co-relation 50694. Up to 4761 conditions per place. [2024-06-20 17:49:48,458 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 474 selfloop transitions, 116 changer transitions 0/597 dead transitions. [2024-06-20 17:49:48,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 449 places, 597 transitions, 9519 flow [2024-06-20 17:49:48,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:49:48,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:49:48,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 209 transitions. [2024-06-20 17:49:48,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5805555555555556 [2024-06-20 17:49:48,460 INFO L175 Difference]: Start difference. First operand has 441 places, 564 transitions, 8193 flow. Second operand 9 states and 209 transitions. [2024-06-20 17:49:48,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 449 places, 597 transitions, 9519 flow [2024-06-20 17:49:51,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 597 transitions, 9358 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-20 17:49:51,874 INFO L231 Difference]: Finished difference. Result has 445 places, 565 transitions, 8299 flow [2024-06-20 17:49:51,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8040, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=564, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=448, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8299, PETRI_PLACES=445, PETRI_TRANSITIONS=565} [2024-06-20 17:49:51,875 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 404 predicate places. [2024-06-20 17:49:51,875 INFO L495 AbstractCegarLoop]: Abstraction has has 445 places, 565 transitions, 8299 flow [2024-06-20 17:49:51,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:49:51,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:49:51,876 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:49:51,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-20 17:49:51,876 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:49:51,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:49:51,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1596604604, now seen corresponding path program 15 times [2024-06-20 17:49:51,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:49:51,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234692312] [2024-06-20 17:49:51,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:49:51,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:49:51,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:49:52,242 INFO 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 17:49:52,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:49:52,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234692312] [2024-06-20 17:49:52,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234692312] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:49:52,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:49:52,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:49:52,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446141746] [2024-06-20 17:49:52,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:49:52,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:49:52,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:49:52,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:49:52,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:49:52,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:49:52,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 565 transitions, 8299 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:49:52,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:49:52,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:49:52,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:49:53,596 INFO L124 PetriNetUnfolderBase]: 3315/5552 cut-off events. [2024-06-20 17:49:53,596 INFO L125 PetriNetUnfolderBase]: For 1001652/1001662 co-relation queries the response was YES. [2024-06-20 17:49:53,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51398 conditions, 5552 events. 3315/5552 cut-off events. For 1001652/1001662 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 37163 event pairs, 772 based on Foata normal form. 18/5569 useless extension candidates. Maximal degree in co-relation 51203. Up to 4805 conditions per place. [2024-06-20 17:49:53,681 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 467 selfloop transitions, 122 changer transitions 0/596 dead transitions. [2024-06-20 17:49:53,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 596 transitions, 9611 flow [2024-06-20 17:49:53,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:49:53,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:49:53,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 224 transitions. [2024-06-20 17:49:53,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.56 [2024-06-20 17:49:53,682 INFO L175 Difference]: Start difference. First operand has 445 places, 565 transitions, 8299 flow. Second operand 10 states and 224 transitions. [2024-06-20 17:49:53,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 454 places, 596 transitions, 9611 flow [2024-06-20 17:49:57,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 447 places, 596 transitions, 9380 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-20 17:49:57,798 INFO L231 Difference]: Finished difference. Result has 448 places, 566 transitions, 8341 flow [2024-06-20 17:49:57,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8068, PETRI_DIFFERENCE_MINUEND_PLACES=438, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=565, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=443, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8341, PETRI_PLACES=448, PETRI_TRANSITIONS=566} [2024-06-20 17:49:57,798 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 407 predicate places. [2024-06-20 17:49:57,798 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 566 transitions, 8341 flow [2024-06-20 17:49:57,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:49:57,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:49:57,798 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:49:57,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-20 17:49:57,799 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:49:57,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:49:57,799 INFO L85 PathProgramCache]: Analyzing trace with hash 442866510, now seen corresponding path program 16 times [2024-06-20 17:49:57,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:49:57,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831019254] [2024-06-20 17:49:57,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:49:57,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:49:57,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:49:58,172 INFO 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 17:49:58,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:49:58,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831019254] [2024-06-20 17:49:58,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831019254] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:49:58,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:49:58,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:49:58,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475712283] [2024-06-20 17:49:58,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:49:58,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:49:58,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:49:58,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:49:58,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:49:58,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:49:58,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 566 transitions, 8341 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:49:58,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:49:58,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:49:58,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:49:59,467 INFO L124 PetriNetUnfolderBase]: 3409/5693 cut-off events. [2024-06-20 17:49:59,468 INFO L125 PetriNetUnfolderBase]: For 1098163/1098171 co-relation queries the response was YES. [2024-06-20 17:49:59,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54004 conditions, 5693 events. 3409/5693 cut-off events. For 1098163/1098171 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 38186 event pairs, 813 based on Foata normal form. 16/5707 useless extension candidates. Maximal degree in co-relation 53808. Up to 4725 conditions per place. [2024-06-20 17:49:59,561 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 484 selfloop transitions, 110 changer transitions 0/601 dead transitions. [2024-06-20 17:49:59,561 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 601 transitions, 9989 flow [2024-06-20 17:49:59,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:49:59,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:49:59,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-20 17:49:59,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6178571428571429 [2024-06-20 17:49:59,563 INFO L175 Difference]: Start difference. First operand has 448 places, 566 transitions, 8341 flow. Second operand 7 states and 173 transitions. [2024-06-20 17:49:59,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 454 places, 601 transitions, 9989 flow [2024-06-20 17:50:03,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 601 transitions, 9744 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-20 17:50:03,721 INFO L231 Difference]: Finished difference. Result has 448 places, 569 transitions, 8417 flow [2024-06-20 17:50:03,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8096, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=566, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=457, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8417, PETRI_PLACES=448, PETRI_TRANSITIONS=569} [2024-06-20 17:50:03,722 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 407 predicate places. [2024-06-20 17:50:03,722 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 569 transitions, 8417 flow [2024-06-20 17:50:03,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:50:03,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:50:03,722 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:50:03,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-20 17:50:03,722 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:50:03,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:50:03,723 INFO L85 PathProgramCache]: Analyzing trace with hash 1250471038, now seen corresponding path program 17 times [2024-06-20 17:50:03,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:50:03,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085231652] [2024-06-20 17:50:03,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:50:03,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:50:03,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:50:04,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:50:04,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:50:04,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085231652] [2024-06-20 17:50:04,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085231652] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:50:04,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:50:04,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:50:04,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276611930] [2024-06-20 17:50:04,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:50:04,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:50:04,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:50:04,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:50:04,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:50:04,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:50:04,158 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 569 transitions, 8417 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:50:04,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:50:04,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:50:04,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:50:05,432 INFO L124 PetriNetUnfolderBase]: 3437/5737 cut-off events. [2024-06-20 17:50:05,433 INFO L125 PetriNetUnfolderBase]: For 1118900/1118908 co-relation queries the response was YES. [2024-06-20 17:50:05,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54657 conditions, 5737 events. 3437/5737 cut-off events. For 1118900/1118908 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 38532 event pairs, 833 based on Foata normal form. 16/5751 useless extension candidates. Maximal degree in co-relation 54459. Up to 4995 conditions per place. [2024-06-20 17:50:05,529 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 478 selfloop transitions, 109 changer transitions 0/594 dead transitions. [2024-06-20 17:50:05,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 594 transitions, 9720 flow [2024-06-20 17:50:05,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:50:05,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:50:05,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-20 17:50:05,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5928571428571429 [2024-06-20 17:50:05,530 INFO L175 Difference]: Start difference. First operand has 448 places, 569 transitions, 8417 flow. Second operand 7 states and 166 transitions. [2024-06-20 17:50:05,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 454 places, 594 transitions, 9720 flow [2024-06-20 17:50:10,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 594 transitions, 9565 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-20 17:50:10,322 INFO L231 Difference]: Finished difference. Result has 452 places, 570 transitions, 8518 flow [2024-06-20 17:50:10,323 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8270, PETRI_DIFFERENCE_MINUEND_PLACES=445, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=569, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=460, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8518, PETRI_PLACES=452, PETRI_TRANSITIONS=570} [2024-06-20 17:50:10,323 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 411 predicate places. [2024-06-20 17:50:10,323 INFO L495 AbstractCegarLoop]: Abstraction has has 452 places, 570 transitions, 8518 flow [2024-06-20 17:50:10,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:50:10,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:50:10,323 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:50:10,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-20 17:50:10,324 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:50:10,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:50:10,324 INFO L85 PathProgramCache]: Analyzing trace with hash 557379270, now seen corresponding path program 18 times [2024-06-20 17:50:10,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:50:10,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107276028] [2024-06-20 17:50:10,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:50:10,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:50:10,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:50:10,698 INFO 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 17:50:10,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:50:10,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107276028] [2024-06-20 17:50:10,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107276028] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:50:10,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:50:10,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:50:10,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943554272] [2024-06-20 17:50:10,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:50:10,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:50:10,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:50:10,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:50:10,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:50:10,759 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:50:10,759 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 570 transitions, 8518 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:50:10,759 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:50:10,759 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:50:10,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:50:12,123 INFO L124 PetriNetUnfolderBase]: 3457/5775 cut-off events. [2024-06-20 17:50:12,124 INFO L125 PetriNetUnfolderBase]: For 1121909/1121917 co-relation queries the response was YES. [2024-06-20 17:50:12,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55056 conditions, 5775 events. 3457/5775 cut-off events. For 1121909/1121917 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 38852 event pairs, 619 based on Foata normal form. 14/5787 useless extension candidates. Maximal degree in co-relation 54856. Up to 4178 conditions per place. [2024-06-20 17:50:12,218 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 472 selfloop transitions, 127 changer transitions 0/606 dead transitions. [2024-06-20 17:50:12,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 606 transitions, 10368 flow [2024-06-20 17:50:12,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:50:12,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:50:12,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-20 17:50:12,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6285714285714286 [2024-06-20 17:50:12,219 INFO L175 Difference]: Start difference. First operand has 452 places, 570 transitions, 8518 flow. Second operand 7 states and 176 transitions. [2024-06-20 17:50:12,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 606 transitions, 10368 flow [2024-06-20 17:50:17,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 606 transitions, 10149 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-20 17:50:17,077 INFO L231 Difference]: Finished difference. Result has 454 places, 571 transitions, 8585 flow [2024-06-20 17:50:17,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8299, PETRI_DIFFERENCE_MINUEND_PLACES=447, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=570, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=444, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8585, PETRI_PLACES=454, PETRI_TRANSITIONS=571} [2024-06-20 17:50:17,078 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 413 predicate places. [2024-06-20 17:50:17,078 INFO L495 AbstractCegarLoop]: Abstraction has has 454 places, 571 transitions, 8585 flow [2024-06-20 17:50:17,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:50:17,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:50:17,078 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:50:17,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-20 17:50:17,078 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:50:17,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:50:17,079 INFO L85 PathProgramCache]: Analyzing trace with hash 300883410, now seen corresponding path program 19 times [2024-06-20 17:50:17,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:50:17,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247758151] [2024-06-20 17:50:17,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:50:17,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:50:17,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:50:17,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:50:17,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:50:17,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247758151] [2024-06-20 17:50:17,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247758151] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:50:17,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:50:17,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:50:17,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760600644] [2024-06-20 17:50:17,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:50:17,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:50:17,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:50:17,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:50:17,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:50:17,556 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:50:17,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 454 places, 571 transitions, 8585 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:50:17,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:50:17,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:50:17,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:50:18,996 INFO L124 PetriNetUnfolderBase]: 3444/5757 cut-off events. [2024-06-20 17:50:18,997 INFO L125 PetriNetUnfolderBase]: For 1101386/1101396 co-relation queries the response was YES. [2024-06-20 17:50:19,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54636 conditions, 5757 events. 3444/5757 cut-off events. For 1101386/1101396 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 38725 event pairs, 596 based on Foata normal form. 16/5772 useless extension candidates. Maximal degree in co-relation 54435. Up to 5070 conditions per place. [2024-06-20 17:50:19,083 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 532 selfloop transitions, 57 changer transitions 0/596 dead transitions. [2024-06-20 17:50:19,083 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 596 transitions, 9843 flow [2024-06-20 17:50:19,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:50:19,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:50:19,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-20 17:50:19,084 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5892857142857143 [2024-06-20 17:50:19,084 INFO L175 Difference]: Start difference. First operand has 454 places, 571 transitions, 8585 flow. Second operand 7 states and 165 transitions. [2024-06-20 17:50:19,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 596 transitions, 9843 flow [2024-06-20 17:50:23,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 450 places, 596 transitions, 9165 flow, removed 23 selfloop flow, removed 10 redundant places. [2024-06-20 17:50:23,695 INFO L231 Difference]: Finished difference. Result has 451 places, 571 transitions, 8025 flow [2024-06-20 17:50:23,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7907, PETRI_DIFFERENCE_MINUEND_PLACES=444, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=571, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=514, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8025, PETRI_PLACES=451, PETRI_TRANSITIONS=571} [2024-06-20 17:50:23,696 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 410 predicate places. [2024-06-20 17:50:23,696 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 571 transitions, 8025 flow [2024-06-20 17:50:23,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:50:23,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:50:23,696 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:50:23,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-20 17:50:23,697 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:50:23,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:50:23,697 INFO L85 PathProgramCache]: Analyzing trace with hash 300883596, now seen corresponding path program 13 times [2024-06-20 17:50:23,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:50:23,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435280728] [2024-06-20 17:50:23,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:50:23,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:50:23,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:50:24,081 INFO 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 17:50:24,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:50:24,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435280728] [2024-06-20 17:50:24,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435280728] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:50:24,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:50:24,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:50:24,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317839383] [2024-06-20 17:50:24,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:50:24,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:50:24,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:50:24,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:50:24,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:50:24,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:50:24,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 571 transitions, 8025 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:50:24,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:50:24,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:50:24,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:50:25,456 INFO L124 PetriNetUnfolderBase]: 3431/5740 cut-off events. [2024-06-20 17:50:25,456 INFO L125 PetriNetUnfolderBase]: For 1071424/1071434 co-relation queries the response was YES. [2024-06-20 17:50:25,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52059 conditions, 5740 events. 3431/5740 cut-off events. For 1071424/1071434 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 38566 event pairs, 578 based on Foata normal form. 16/5755 useless extension candidates. Maximal degree in co-relation 51862. Up to 4680 conditions per place. [2024-06-20 17:50:25,550 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 499 selfloop transitions, 95 changer transitions 0/601 dead transitions. [2024-06-20 17:50:25,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 601 transitions, 9583 flow [2024-06-20 17:50:25,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:50:25,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:50:25,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-20 17:50:25,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.596875 [2024-06-20 17:50:25,551 INFO L175 Difference]: Start difference. First operand has 451 places, 571 transitions, 8025 flow. Second operand 8 states and 191 transitions. [2024-06-20 17:50:25,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 601 transitions, 9583 flow [2024-06-20 17:50:29,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 452 places, 601 transitions, 9449 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-20 17:50:29,928 INFO L231 Difference]: Finished difference. Result has 453 places, 571 transitions, 8087 flow [2024-06-20 17:50:29,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7891, PETRI_DIFFERENCE_MINUEND_PLACES=445, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=571, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=476, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8087, PETRI_PLACES=453, PETRI_TRANSITIONS=571} [2024-06-20 17:50:29,929 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 412 predicate places. [2024-06-20 17:50:29,929 INFO L495 AbstractCegarLoop]: Abstraction has has 453 places, 571 transitions, 8087 flow [2024-06-20 17:50:29,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:50:29,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:50:29,929 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:50:29,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-20 17:50:29,929 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:50:29,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:50:29,930 INFO L85 PathProgramCache]: Analyzing trace with hash 566580690, now seen corresponding path program 20 times [2024-06-20 17:50:29,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:50:29,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443833892] [2024-06-20 17:50:29,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:50:29,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:50:29,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:50:30,321 INFO 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 17:50:30,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:50:30,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443833892] [2024-06-20 17:50:30,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443833892] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:50:30,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:50:30,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:50:30,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824813585] [2024-06-20 17:50:30,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:50:30,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:50:30,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:50:30,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:50:30,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:50:30,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:50:30,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 453 places, 571 transitions, 8087 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:50:30,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:50:30,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:50:30,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:50:31,713 INFO L124 PetriNetUnfolderBase]: 3418/5713 cut-off events. [2024-06-20 17:50:31,714 INFO L125 PetriNetUnfolderBase]: For 1050672/1050682 co-relation queries the response was YES. [2024-06-20 17:50:31,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51548 conditions, 5713 events. 3418/5713 cut-off events. For 1050672/1050682 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 38446 event pairs, 783 based on Foata normal form. 16/5724 useless extension candidates. Maximal degree in co-relation 51350. Up to 5055 conditions per place. [2024-06-20 17:50:31,799 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 536 selfloop transitions, 54 changer transitions 0/597 dead transitions. [2024-06-20 17:50:31,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 597 transitions, 9625 flow [2024-06-20 17:50:31,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:50:31,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:50:31,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-20 17:50:31,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.571875 [2024-06-20 17:50:31,800 INFO L175 Difference]: Start difference. First operand has 453 places, 571 transitions, 8087 flow. Second operand 8 states and 183 transitions. [2024-06-20 17:50:31,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 597 transitions, 9625 flow [2024-06-20 17:50:36,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 597 transitions, 9352 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-20 17:50:36,271 INFO L231 Difference]: Finished difference. Result has 452 places, 571 transitions, 7926 flow [2024-06-20 17:50:36,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7814, PETRI_DIFFERENCE_MINUEND_PLACES=444, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=571, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=517, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7926, PETRI_PLACES=452, PETRI_TRANSITIONS=571} [2024-06-20 17:50:36,271 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 411 predicate places. [2024-06-20 17:50:36,271 INFO L495 AbstractCegarLoop]: Abstraction has has 452 places, 571 transitions, 7926 flow [2024-06-20 17:50:36,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:50:36,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:50:36,271 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:50:36,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-20 17:50:36,272 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:50:36,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:50:36,272 INFO L85 PathProgramCache]: Analyzing trace with hash 566907306, now seen corresponding path program 14 times [2024-06-20 17:50:36,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:50:36,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412551628] [2024-06-20 17:50:36,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:50:36,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:50:36,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:50:36,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:50:36,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:50:36,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412551628] [2024-06-20 17:50:36,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412551628] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:50:36,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:50:36,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:50:36,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533069211] [2024-06-20 17:50:36,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:50:36,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:50:36,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:50:36,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:50:36,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:50:36,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:50:36,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 571 transitions, 7926 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:50:36,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:50:36,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:50:36,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:50:37,970 INFO L124 PetriNetUnfolderBase]: 3400/5695 cut-off events. [2024-06-20 17:50:37,970 INFO L125 PetriNetUnfolderBase]: For 1019575/1019585 co-relation queries the response was YES. [2024-06-20 17:50:38,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50077 conditions, 5695 events. 3400/5695 cut-off events. For 1019575/1019585 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 38333 event pairs, 777 based on Foata normal form. 18/5712 useless extension candidates. Maximal degree in co-relation 49879. Up to 5013 conditions per place. [2024-06-20 17:50:38,062 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 506 selfloop transitions, 80 changer transitions 0/593 dead transitions. [2024-06-20 17:50:38,062 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 593 transitions, 9194 flow [2024-06-20 17:50:38,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:50:38,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:50:38,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 184 transitions. [2024-06-20 17:50:38,063 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-20 17:50:38,064 INFO L175 Difference]: Start difference. First operand has 452 places, 571 transitions, 7926 flow. Second operand 8 states and 184 transitions. [2024-06-20 17:50:38,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 593 transitions, 9194 flow [2024-06-20 17:50:42,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 593 transitions, 9062 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-20 17:50:42,392 INFO L231 Difference]: Finished difference. Result has 454 places, 571 transitions, 7964 flow [2024-06-20 17:50:42,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7794, PETRI_DIFFERENCE_MINUEND_PLACES=446, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=571, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=491, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7964, PETRI_PLACES=454, PETRI_TRANSITIONS=571} [2024-06-20 17:50:42,392 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 413 predicate places. [2024-06-20 17:50:42,393 INFO L495 AbstractCegarLoop]: Abstraction has has 454 places, 571 transitions, 7964 flow [2024-06-20 17:50:42,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:50:42,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:50:42,393 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:50:42,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-20 17:50:42,393 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:50:42,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:50:42,393 INFO L85 PathProgramCache]: Analyzing trace with hash 308296440, now seen corresponding path program 21 times [2024-06-20 17:50:42,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:50:42,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412227204] [2024-06-20 17:50:42,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:50:42,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:50:42,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:50:42,786 INFO 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 17:50:42,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:50:42,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412227204] [2024-06-20 17:50:42,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412227204] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:50:42,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:50:42,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:50:42,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927648095] [2024-06-20 17:50:42,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:50:42,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:50:42,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:50:42,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:50:42,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:50:42,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:50:42,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 454 places, 571 transitions, 7964 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:50:42,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:50:42,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:50:42,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:50:44,102 INFO L124 PetriNetUnfolderBase]: 3382/5665 cut-off events. [2024-06-20 17:50:44,102 INFO L125 PetriNetUnfolderBase]: For 977645/977655 co-relation queries the response was YES. [2024-06-20 17:50:44,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49050 conditions, 5665 events. 3382/5665 cut-off events. For 977645/977655 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 38147 event pairs, 779 based on Foata normal form. 18/5682 useless extension candidates. Maximal degree in co-relation 48851. Up to 5059 conditions per place. [2024-06-20 17:50:44,195 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 536 selfloop transitions, 49 changer transitions 0/592 dead transitions. [2024-06-20 17:50:44,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 592 transitions, 9226 flow [2024-06-20 17:50:44,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:50:44,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:50:44,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-20 17:50:44,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-20 17:50:44,196 INFO L175 Difference]: Start difference. First operand has 454 places, 571 transitions, 7964 flow. Second operand 7 states and 161 transitions. [2024-06-20 17:50:44,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 592 transitions, 9226 flow [2024-06-20 17:50:48,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 592 transitions, 9055 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-20 17:50:48,427 INFO L231 Difference]: Finished difference. Result has 454 places, 571 transitions, 7898 flow [2024-06-20 17:50:48,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7793, PETRI_DIFFERENCE_MINUEND_PLACES=447, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=571, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7898, PETRI_PLACES=454, PETRI_TRANSITIONS=571} [2024-06-20 17:50:48,428 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 413 predicate places. [2024-06-20 17:50:48,428 INFO L495 AbstractCegarLoop]: Abstraction has has 454 places, 571 transitions, 7898 flow [2024-06-20 17:50:48,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:50:48,428 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:50:48,428 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:50:48,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-20 17:50:48,428 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:50:48,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:50:48,429 INFO L85 PathProgramCache]: Analyzing trace with hash 566580876, now seen corresponding path program 15 times [2024-06-20 17:50:48,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:50:48,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678163615] [2024-06-20 17:50:48,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:50:48,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:50:48,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:50:48,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:50:48,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:50:48,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678163615] [2024-06-20 17:50:48,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678163615] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:50:48,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:50:48,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:50:48,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137750894] [2024-06-20 17:50:48,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:50:48,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:50:48,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:50:48,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:50:48,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:50:48,884 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:50:48,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 454 places, 571 transitions, 7898 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:50:48,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:50:48,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:50:48,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:50:50,142 INFO L124 PetriNetUnfolderBase]: 3369/5644 cut-off events. [2024-06-20 17:50:50,142 INFO L125 PetriNetUnfolderBase]: For 934026/934036 co-relation queries the response was YES. [2024-06-20 17:50:50,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48227 conditions, 5644 events. 3369/5644 cut-off events. For 934026/934036 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 38034 event pairs, 734 based on Foata normal form. 16/5657 useless extension candidates. Maximal degree in co-relation 48027. Up to 4906 conditions per place. [2024-06-20 17:50:50,235 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 506 selfloop transitions, 83 changer transitions 0/596 dead transitions. [2024-06-20 17:50:50,235 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 461 places, 596 transitions, 9200 flow [2024-06-20 17:50:50,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:50:50,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:50:50,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-20 17:50:50,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.584375 [2024-06-20 17:50:50,236 INFO L175 Difference]: Start difference. First operand has 454 places, 571 transitions, 7898 flow. Second operand 8 states and 187 transitions. [2024-06-20 17:50:50,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 461 places, 596 transitions, 9200 flow [2024-06-20 17:50:54,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 456 places, 596 transitions, 9097 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-20 17:50:54,663 INFO L231 Difference]: Finished difference. Result has 457 places, 571 transitions, 7967 flow [2024-06-20 17:50:54,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7795, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=571, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=488, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7967, PETRI_PLACES=457, PETRI_TRANSITIONS=571} [2024-06-20 17:50:54,664 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 416 predicate places. [2024-06-20 17:50:54,664 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 571 transitions, 7967 flow [2024-06-20 17:50:54,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:50:54,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:50:54,664 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:50:54,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-20 17:50:54,665 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:50:54,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:50:54,665 INFO L85 PathProgramCache]: Analyzing trace with hash -1022868432, now seen corresponding path program 22 times [2024-06-20 17:50:54,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:50:54,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304208919] [2024-06-20 17:50:54,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:50:54,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:50:54,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:50:55,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:50:55,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:50:55,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304208919] [2024-06-20 17:50:55,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304208919] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:50:55,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:50:55,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:50:55,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760604177] [2024-06-20 17:50:55,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:50:55,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:50:55,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:50:55,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:50:55,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:50:55,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:50:55,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 571 transitions, 7967 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:50:55,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:50:55,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:50:55,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:50:56,391 INFO L124 PetriNetUnfolderBase]: 3351/5620 cut-off events. [2024-06-20 17:50:56,391 INFO L125 PetriNetUnfolderBase]: For 904679/904689 co-relation queries the response was YES. [2024-06-20 17:50:56,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47282 conditions, 5620 events. 3351/5620 cut-off events. For 904679/904689 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 37896 event pairs, 752 based on Foata normal form. 18/5637 useless extension candidates. Maximal degree in co-relation 47081. Up to 4768 conditions per place. [2024-06-20 17:50:56,484 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 499 selfloop transitions, 99 changer transitions 0/605 dead transitions. [2024-06-20 17:50:56,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 605 transitions, 9289 flow [2024-06-20 17:50:56,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:50:56,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:50:56,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-20 17:50:56,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.609375 [2024-06-20 17:50:56,485 INFO L175 Difference]: Start difference. First operand has 457 places, 571 transitions, 7967 flow. Second operand 8 states and 195 transitions. [2024-06-20 17:50:56,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 464 places, 605 transitions, 9289 flow [2024-06-20 17:50:59,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 456 places, 605 transitions, 9067 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-20 17:50:59,775 INFO L231 Difference]: Finished difference. Result has 457 places, 571 transitions, 7960 flow [2024-06-20 17:50:59,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7745, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=571, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=472, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7960, PETRI_PLACES=457, PETRI_TRANSITIONS=571} [2024-06-20 17:50:59,776 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 416 predicate places. [2024-06-20 17:50:59,776 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 571 transitions, 7960 flow [2024-06-20 17:50:59,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:50:59,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:50:59,776 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:50:59,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-20 17:50:59,777 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:50:59,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:50:59,777 INFO L85 PathProgramCache]: Analyzing trace with hash -1022689686, now seen corresponding path program 16 times [2024-06-20 17:50:59,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:50:59,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451342054] [2024-06-20 17:50:59,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:50:59,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:50:59,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:51:00,184 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 17:51:00,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:51:00,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451342054] [2024-06-20 17:51:00,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451342054] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:51:00,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:51:00,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:51:00,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608663993] [2024-06-20 17:51:00,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:51:00,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:51:00,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:51:00,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:51:00,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:51:00,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:51:00,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 571 transitions, 7960 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:51:00,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:51:00,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:51:00,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:51:01,468 INFO L124 PetriNetUnfolderBase]: 3379/5664 cut-off events. [2024-06-20 17:51:01,469 INFO L125 PetriNetUnfolderBase]: For 918985/918995 co-relation queries the response was YES. [2024-06-20 17:51:01,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47780 conditions, 5664 events. 3379/5664 cut-off events. For 918985/918995 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 38129 event pairs, 744 based on Foata normal form. 18/5681 useless extension candidates. Maximal degree in co-relation 47578. Up to 4918 conditions per place. [2024-06-20 17:51:01,558 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 503 selfloop transitions, 83 changer transitions 0/593 dead transitions. [2024-06-20 17:51:01,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 593 transitions, 9253 flow [2024-06-20 17:51:01,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:51:01,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:51:01,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-20 17:51:01,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5892857142857143 [2024-06-20 17:51:01,576 INFO L175 Difference]: Start difference. First operand has 457 places, 571 transitions, 7960 flow. Second operand 7 states and 165 transitions. [2024-06-20 17:51:01,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 593 transitions, 9253 flow [2024-06-20 17:51:05,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 593 transitions, 9034 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-20 17:51:05,906 INFO L231 Difference]: Finished difference. Result has 455 places, 572 transitions, 7954 flow [2024-06-20 17:51:05,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7741, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=571, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=488, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7954, PETRI_PLACES=455, PETRI_TRANSITIONS=572} [2024-06-20 17:51:05,907 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 414 predicate places. [2024-06-20 17:51:05,907 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 572 transitions, 7954 flow [2024-06-20 17:51:05,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:51:05,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:51:05,907 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:51:05,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-20 17:51:05,907 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:51:05,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:51:05,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1017506052, now seen corresponding path program 23 times [2024-06-20 17:51:05,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:51:05,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481169058] [2024-06-20 17:51:05,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:51:05,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:51:05,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:51:06,311 INFO 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 17:51:06,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:51:06,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481169058] [2024-06-20 17:51:06,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481169058] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:51:06,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:51:06,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:51:06,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991406646] [2024-06-20 17:51:06,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:51:06,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:51:06,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:51:06,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:51:06,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:51:06,398 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:51:06,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 572 transitions, 7954 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:51:06,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:51:06,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:51:06,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:51:07,716 INFO L124 PetriNetUnfolderBase]: 3361/5638 cut-off events. [2024-06-20 17:51:07,716 INFO L125 PetriNetUnfolderBase]: For 844345/844355 co-relation queries the response was YES. [2024-06-20 17:51:07,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46492 conditions, 5638 events. 3361/5638 cut-off events. For 844345/844355 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 38043 event pairs, 748 based on Foata normal form. 18/5655 useless extension candidates. Maximal degree in co-relation 46291. Up to 4808 conditions per place. [2024-06-20 17:51:07,805 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 497 selfloop transitions, 98 changer transitions 0/602 dead transitions. [2024-06-20 17:51:07,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 461 places, 602 transitions, 9260 flow [2024-06-20 17:51:07,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:51:07,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:51:07,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-20 17:51:07,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6214285714285714 [2024-06-20 17:51:07,806 INFO L175 Difference]: Start difference. First operand has 455 places, 572 transitions, 7954 flow. Second operand 7 states and 174 transitions. [2024-06-20 17:51:07,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 461 places, 602 transitions, 9260 flow [2024-06-20 17:51:10,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 602 transitions, 9078 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-20 17:51:10,872 INFO L231 Difference]: Finished difference. Result has 455 places, 572 transitions, 7984 flow [2024-06-20 17:51:10,872 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7772, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=572, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=474, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7984, PETRI_PLACES=455, PETRI_TRANSITIONS=572} [2024-06-20 17:51:10,872 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 414 predicate places. [2024-06-20 17:51:10,872 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 572 transitions, 7984 flow [2024-06-20 17:51:10,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:51:10,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:51:10,873 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:51:10,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-20 17:51:10,873 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:51:10,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:51:10,873 INFO L85 PathProgramCache]: Analyzing trace with hash -1011964926, now seen corresponding path program 17 times [2024-06-20 17:51:10,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:51:10,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245100321] [2024-06-20 17:51:10,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:51:10,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:51:10,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:51:11,245 INFO 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 17:51:11,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:51:11,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245100321] [2024-06-20 17:51:11,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245100321] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:51:11,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:51:11,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:51:11,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255377274] [2024-06-20 17:51:11,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:51:11,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:51:11,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:51:11,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:51:11,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:51:11,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:51:11,292 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 572 transitions, 7984 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:51:11,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:51:11,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:51:11,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:51:12,674 INFO L124 PetriNetUnfolderBase]: 3376/5671 cut-off events. [2024-06-20 17:51:12,674 INFO L125 PetriNetUnfolderBase]: For 817205/817215 co-relation queries the response was YES. [2024-06-20 17:51:12,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46296 conditions, 5671 events. 3376/5671 cut-off events. For 817205/817215 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 38338 event pairs, 767 based on Foata normal form. 18/5688 useless extension candidates. Maximal degree in co-relation 46096. Up to 4985 conditions per place. [2024-06-20 17:51:12,756 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 507 selfloop transitions, 81 changer transitions 0/595 dead transitions. [2024-06-20 17:51:12,756 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 462 places, 595 transitions, 9285 flow [2024-06-20 17:51:12,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:51:12,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:51:12,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-20 17:51:12,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.571875 [2024-06-20 17:51:12,757 INFO L175 Difference]: Start difference. First operand has 455 places, 572 transitions, 7984 flow. Second operand 8 states and 183 transitions. [2024-06-20 17:51:12,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 462 places, 595 transitions, 9285 flow [2024-06-20 17:51:16,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 595 transitions, 9066 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-20 17:51:16,222 INFO L231 Difference]: Finished difference. Result has 456 places, 573 transitions, 7968 flow [2024-06-20 17:51:16,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7765, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=572, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=491, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7968, PETRI_PLACES=456, PETRI_TRANSITIONS=573} [2024-06-20 17:51:16,223 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 415 predicate places. [2024-06-20 17:51:16,223 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 573 transitions, 7968 flow [2024-06-20 17:51:16,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:51:16,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:51:16,223 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:51:16,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-20 17:51:16,223 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:51:16,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:51:16,224 INFO L85 PathProgramCache]: Analyzing trace with hash -1023016302, now seen corresponding path program 24 times [2024-06-20 17:51:16,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:51:16,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528201699] [2024-06-20 17:51:16,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:51:16,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:51:16,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:51:16,619 INFO 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 17:51:16,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:51:16,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528201699] [2024-06-20 17:51:16,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528201699] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:51:16,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:51:16,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:51:16,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081168543] [2024-06-20 17:51:16,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:51:16,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:51:16,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:51:16,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:51:16,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:51:16,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:51:16,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 573 transitions, 7968 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:51:16,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:51:16,701 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:51:16,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:51:17,997 INFO L124 PetriNetUnfolderBase]: 3363/5654 cut-off events. [2024-06-20 17:51:17,997 INFO L125 PetriNetUnfolderBase]: For 758353/758363 co-relation queries the response was YES. [2024-06-20 17:51:18,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45365 conditions, 5654 events. 3363/5654 cut-off events. For 758353/758363 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 38317 event pairs, 512 based on Foata normal form. 16/5669 useless extension candidates. Maximal degree in co-relation 45165. Up to 4442 conditions per place. [2024-06-20 17:51:18,086 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 487 selfloop transitions, 116 changer transitions 0/610 dead transitions. [2024-06-20 17:51:18,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 610 transitions, 9326 flow [2024-06-20 17:51:18,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:51:18,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:51:18,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-20 17:51:18,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.61875 [2024-06-20 17:51:18,087 INFO L175 Difference]: Start difference. First operand has 456 places, 573 transitions, 7968 flow. Second operand 8 states and 198 transitions. [2024-06-20 17:51:18,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 610 transitions, 9326 flow [2024-06-20 17:51:21,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 456 places, 610 transitions, 9147 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-20 17:51:21,385 INFO L231 Difference]: Finished difference. Result has 457 places, 573 transitions, 8029 flow [2024-06-20 17:51:21,386 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7789, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=573, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=457, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8029, PETRI_PLACES=457, PETRI_TRANSITIONS=573} [2024-06-20 17:51:21,386 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 416 predicate places. [2024-06-20 17:51:21,386 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 573 transitions, 8029 flow [2024-06-20 17:51:21,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:51:21,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:51:21,386 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:51:21,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-20 17:51:21,387 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:51:21,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:51:21,387 INFO L85 PathProgramCache]: Analyzing trace with hash -1023016116, now seen corresponding path program 18 times [2024-06-20 17:51:21,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:51:21,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736432126] [2024-06-20 17:51:21,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:51:21,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:51:21,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:51:21,769 INFO 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 17:51:21,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:51:21,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736432126] [2024-06-20 17:51:21,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736432126] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:51:21,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:51:21,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:51:21,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511556273] [2024-06-20 17:51:21,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:51:21,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:51:21,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:51:21,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:51:21,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:51:21,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:51:21,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 573 transitions, 8029 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:51:21,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:51:21,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:51:21,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:51:23,072 INFO L124 PetriNetUnfolderBase]: 3350/5633 cut-off events. [2024-06-20 17:51:23,072 INFO L125 PetriNetUnfolderBase]: For 714683/714693 co-relation queries the response was YES. [2024-06-20 17:51:23,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44608 conditions, 5633 events. 3350/5633 cut-off events. For 714683/714693 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 38113 event pairs, 513 based on Foata normal form. 16/5648 useless extension candidates. Maximal degree in co-relation 44408. Up to 4570 conditions per place. [2024-06-20 17:51:23,163 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 494 selfloop transitions, 99 changer transitions 0/600 dead transitions. [2024-06-20 17:51:23,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 600 transitions, 9345 flow [2024-06-20 17:51:23,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:51:23,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:51:23,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-20 17:51:23,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6107142857142858 [2024-06-20 17:51:23,165 INFO L175 Difference]: Start difference. First operand has 457 places, 573 transitions, 8029 flow. Second operand 7 states and 171 transitions. [2024-06-20 17:51:23,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 600 transitions, 9345 flow [2024-06-20 17:51:26,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 600 transitions, 9093 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-20 17:51:26,199 INFO L231 Difference]: Finished difference. Result has 455 places, 573 transitions, 7989 flow [2024-06-20 17:51:26,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7777, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=573, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=474, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7989, PETRI_PLACES=455, PETRI_TRANSITIONS=573} [2024-06-20 17:51:26,199 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 414 predicate places. [2024-06-20 17:51:26,199 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 573 transitions, 7989 flow [2024-06-20 17:51:26,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:51:26,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:51:26,200 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:51:26,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-20 17:51:26,200 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:51:26,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:51:26,200 INFO L85 PathProgramCache]: Analyzing trace with hash 836265332, now seen corresponding path program 25 times [2024-06-20 17:51:26,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:51:26,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35991993] [2024-06-20 17:51:26,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:51:26,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:51:26,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:51:26,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:51:26,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:51:26,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35991993] [2024-06-20 17:51:26,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35991993] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:51:26,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:51:26,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:51:26,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618399584] [2024-06-20 17:51:26,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:51:26,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:51:26,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:51:26,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:51:26,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:51:26,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:51:26,647 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 573 transitions, 7989 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:51:26,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:51:26,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:51:26,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:51:27,868 INFO L124 PetriNetUnfolderBase]: 3337/5608 cut-off events. [2024-06-20 17:51:27,869 INFO L125 PetriNetUnfolderBase]: For 661387/661397 co-relation queries the response was YES. [2024-06-20 17:51:27,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43630 conditions, 5608 events. 3337/5608 cut-off events. For 661387/661397 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 38022 event pairs, 681 based on Foata normal form. 16/5617 useless extension candidates. Maximal degree in co-relation 43431. Up to 4509 conditions per place. [2024-06-20 17:51:27,956 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 477 selfloop transitions, 135 changer transitions 0/619 dead transitions. [2024-06-20 17:51:27,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 619 transitions, 9627 flow [2024-06-20 17:51:27,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:51:27,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:51:27,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 242 transitions. [2024-06-20 17:51:27,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.605 [2024-06-20 17:51:27,957 INFO L175 Difference]: Start difference. First operand has 455 places, 573 transitions, 7989 flow. Second operand 10 states and 242 transitions. [2024-06-20 17:51:27,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 464 places, 619 transitions, 9627 flow [2024-06-20 17:51:30,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 456 places, 619 transitions, 9401 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-20 17:51:30,790 INFO L231 Difference]: Finished difference. Result has 457 places, 573 transitions, 8049 flow [2024-06-20 17:51:30,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7769, PETRI_DIFFERENCE_MINUEND_PLACES=447, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=573, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=438, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8049, PETRI_PLACES=457, PETRI_TRANSITIONS=573} [2024-06-20 17:51:30,791 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 416 predicate places. [2024-06-20 17:51:30,791 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 573 transitions, 8049 flow [2024-06-20 17:51:30,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:51:30,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:51:30,791 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:51:30,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-20 17:51:30,791 INFO L420 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:51:30,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:51:30,792 INFO L85 PathProgramCache]: Analyzing trace with hash 836265518, now seen corresponding path program 19 times [2024-06-20 17:51:30,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:51:30,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652785585] [2024-06-20 17:51:30,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:51:30,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:51:30,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:51:31,157 INFO 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 17:51:31,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:51:31,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652785585] [2024-06-20 17:51:31,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652785585] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:51:31,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:51:31,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:51:31,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267575124] [2024-06-20 17:51:31,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:51:31,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:51:31,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:51:31,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:51:31,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:51:31,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:51:31,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 573 transitions, 8049 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:51:31,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:51:31,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:51:31,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:51:32,479 INFO L124 PetriNetUnfolderBase]: 3357/5633 cut-off events. [2024-06-20 17:51:32,480 INFO L125 PetriNetUnfolderBase]: For 641361/641371 co-relation queries the response was YES. [2024-06-20 17:51:32,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43736 conditions, 5633 events. 3357/5633 cut-off events. For 641361/641371 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 38064 event pairs, 713 based on Foata normal form. 16/5635 useless extension candidates. Maximal degree in co-relation 43539. Up to 4698 conditions per place. [2024-06-20 17:51:32,560 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 476 selfloop transitions, 125 changer transitions 0/608 dead transitions. [2024-06-20 17:51:32,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 608 transitions, 9666 flow [2024-06-20 17:51:32,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:51:32,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:51:32,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 228 transitions. [2024-06-20 17:51:32,561 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.57 [2024-06-20 17:51:32,561 INFO L175 Difference]: Start difference. First operand has 457 places, 573 transitions, 8049 flow. Second operand 10 states and 228 transitions. [2024-06-20 17:51:32,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 608 transitions, 9666 flow [2024-06-20 17:51:35,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 608 transitions, 9394 flow, removed 7 selfloop flow, removed 11 redundant places. [2024-06-20 17:51:35,500 INFO L231 Difference]: Finished difference. Result has 456 places, 574 transitions, 8076 flow [2024-06-20 17:51:35,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7783, PETRI_DIFFERENCE_MINUEND_PLACES=446, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=573, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=449, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8076, PETRI_PLACES=456, PETRI_TRANSITIONS=574} [2024-06-20 17:51:35,501 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 415 predicate places. [2024-06-20 17:51:35,501 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 574 transitions, 8076 flow [2024-06-20 17:51:35,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:51:35,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:51:35,501 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:51:35,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-20 17:51:35,501 INFO L420 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:51:35,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:51:35,502 INFO L85 PathProgramCache]: Analyzing trace with hash 756874208, now seen corresponding path program 20 times [2024-06-20 17:51:35,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:51:35,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277331949] [2024-06-20 17:51:35,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:51:35,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:51:35,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:51:35,863 INFO 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 17:51:35,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:51:35,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277331949] [2024-06-20 17:51:35,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277331949] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:51:35,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:51:35,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:51:35,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088595301] [2024-06-20 17:51:35,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:51:35,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:51:35,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:51:35,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:51:35,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:51:35,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:51:35,957 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 574 transitions, 8076 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:51:35,957 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:51:35,958 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:51:35,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:51:37,167 INFO L124 PetriNetUnfolderBase]: 3431/5760 cut-off events. [2024-06-20 17:51:37,168 INFO L125 PetriNetUnfolderBase]: For 693475/693485 co-relation queries the response was YES. [2024-06-20 17:51:37,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45487 conditions, 5760 events. 3431/5760 cut-off events. For 693475/693485 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 39007 event pairs, 746 based on Foata normal form. 18/5777 useless extension candidates. Maximal degree in co-relation 45292. Up to 4732 conditions per place. [2024-06-20 17:51:37,262 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 485 selfloop transitions, 112 changer transitions 0/604 dead transitions. [2024-06-20 17:51:37,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 604 transitions, 9718 flow [2024-06-20 17:51:37,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:51:37,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:51:37,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 204 transitions. [2024-06-20 17:51:37,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5666666666666667 [2024-06-20 17:51:37,264 INFO L175 Difference]: Start difference. First operand has 456 places, 574 transitions, 8076 flow. Second operand 9 states and 204 transitions. [2024-06-20 17:51:37,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 464 places, 604 transitions, 9718 flow [2024-06-20 17:51:40,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 604 transitions, 9472 flow, removed 13 selfloop flow, removed 10 redundant places. [2024-06-20 17:51:40,572 INFO L231 Difference]: Finished difference. Result has 456 places, 576 transitions, 8162 flow [2024-06-20 17:51:40,572 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7835, PETRI_DIFFERENCE_MINUEND_PLACES=446, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=462, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8162, PETRI_PLACES=456, PETRI_TRANSITIONS=576} [2024-06-20 17:51:40,573 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 415 predicate places. [2024-06-20 17:51:40,573 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 576 transitions, 8162 flow [2024-06-20 17:51:40,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:51:40,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:51:40,573 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:51:40,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-20 17:51:40,573 INFO L420 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:51:40,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:51:40,574 INFO L85 PathProgramCache]: Analyzing trace with hash -1513914430, now seen corresponding path program 21 times [2024-06-20 17:51:40,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:51:40,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710996698] [2024-06-20 17:51:40,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:51:40,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:51:40,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:51:40,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:51:40,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:51:40,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710996698] [2024-06-20 17:51:40,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710996698] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:51:40,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:51:40,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:51:40,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200332787] [2024-06-20 17:51:40,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:51:40,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:51:40,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:51:40,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:51:40,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:51:41,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:51:41,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 576 transitions, 8162 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:51:41,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:51:41,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:51:41,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:51:42,156 INFO L124 PetriNetUnfolderBase]: 3413/5731 cut-off events. [2024-06-20 17:51:42,156 INFO L125 PetriNetUnfolderBase]: For 631567/631573 co-relation queries the response was YES. [2024-06-20 17:51:42,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44343 conditions, 5731 events. 3413/5731 cut-off events. For 631567/631573 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 38918 event pairs, 798 based on Foata normal form. 11/5740 useless extension candidates. Maximal degree in co-relation 44149. Up to 5048 conditions per place. [2024-06-20 17:51:42,245 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 484 selfloop transitions, 100 changer transitions 0/591 dead transitions. [2024-06-20 17:51:42,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 462 places, 591 transitions, 9408 flow [2024-06-20 17:51:42,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:51:42,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:51:42,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 157 transitions. [2024-06-20 17:51:42,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5607142857142857 [2024-06-20 17:51:42,246 INFO L175 Difference]: Start difference. First operand has 456 places, 576 transitions, 8162 flow. Second operand 7 states and 157 transitions. [2024-06-20 17:51:42,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 462 places, 591 transitions, 9408 flow [2024-06-20 17:51:44,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 456 places, 591 transitions, 9202 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-20 17:51:44,705 INFO L231 Difference]: Finished difference. Result has 457 places, 576 transitions, 8161 flow [2024-06-20 17:51:44,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7956, PETRI_DIFFERENCE_MINUEND_PLACES=450, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=576, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=476, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8161, PETRI_PLACES=457, PETRI_TRANSITIONS=576} [2024-06-20 17:51:44,705 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 416 predicate places. [2024-06-20 17:51:44,706 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 576 transitions, 8161 flow [2024-06-20 17:51:44,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:51:44,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:51:44,706 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:51:44,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-20 17:51:44,706 INFO L420 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:51:44,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:51:44,706 INFO L85 PathProgramCache]: Analyzing trace with hash -1516771390, now seen corresponding path program 22 times [2024-06-20 17:51:44,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:51:44,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151266842] [2024-06-20 17:51:44,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:51:44,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:51:44,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:51:45,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:51:45,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:51:45,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151266842] [2024-06-20 17:51:45,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151266842] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:51:45,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:51:45,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:51:45,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076522396] [2024-06-20 17:51:45,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:51:45,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:51:45,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:51:45,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:51:45,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:51:45,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:51:45,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 576 transitions, 8161 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:51:45,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:51:45,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:51:45,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:51:46,313 INFO L124 PetriNetUnfolderBase]: 3428/5760 cut-off events. [2024-06-20 17:51:46,314 INFO L125 PetriNetUnfolderBase]: For 618139/618145 co-relation queries the response was YES. [2024-06-20 17:51:46,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44110 conditions, 5760 events. 3428/5760 cut-off events. For 618139/618145 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 39168 event pairs, 787 based on Foata normal form. 11/5769 useless extension candidates. Maximal degree in co-relation 43915. Up to 4961 conditions per place. [2024-06-20 17:51:46,405 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 487 selfloop transitions, 102 changer transitions 0/596 dead transitions. [2024-06-20 17:51:46,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 596 transitions, 9498 flow [2024-06-20 17:51:46,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:51:46,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:51:46,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 160 transitions. [2024-06-20 17:51:46,406 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-20 17:51:46,406 INFO L175 Difference]: Start difference. First operand has 457 places, 576 transitions, 8161 flow. Second operand 7 states and 160 transitions. [2024-06-20 17:51:46,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 596 transitions, 9498 flow [2024-06-20 17:51:48,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 456 places, 596 transitions, 9247 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-20 17:51:48,712 INFO L231 Difference]: Finished difference. Result has 457 places, 577 transitions, 8149 flow [2024-06-20 17:51:48,712 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7910, PETRI_DIFFERENCE_MINUEND_PLACES=450, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=576, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=474, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8149, PETRI_PLACES=457, PETRI_TRANSITIONS=577} [2024-06-20 17:51:48,712 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 416 predicate places. [2024-06-20 17:51:48,712 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 577 transitions, 8149 flow [2024-06-20 17:51:48,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:51:48,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:51:48,713 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:51:48,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-20 17:51:48,713 INFO L420 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:51:48,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:51:48,713 INFO L85 PathProgramCache]: Analyzing trace with hash 836591948, now seen corresponding path program 23 times [2024-06-20 17:51:48,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:51:48,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859232117] [2024-06-20 17:51:48,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:51:48,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:51:48,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:51:49,071 INFO 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 17:51:49,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:51:49,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859232117] [2024-06-20 17:51:49,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859232117] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:51:49,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:51:49,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:51:49,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960792778] [2024-06-20 17:51:49,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:51:49,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:51:49,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:51:49,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:51:49,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:51:49,122 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:51:49,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 577 transitions, 8149 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:51:49,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:51:49,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:51:49,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:51:50,473 INFO L124 PetriNetUnfolderBase]: 3456/5807 cut-off events. [2024-06-20 17:51:50,473 INFO L125 PetriNetUnfolderBase]: For 627733/627743 co-relation queries the response was YES. [2024-06-20 17:51:50,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44344 conditions, 5807 events. 3456/5807 cut-off events. For 627733/627743 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 39555 event pairs, 779 based on Foata normal form. 18/5824 useless extension candidates. Maximal degree in co-relation 44150. Up to 5053 conditions per place. [2024-06-20 17:51:50,553 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 487 selfloop transitions, 111 changer transitions 0/605 dead transitions. [2024-06-20 17:51:50,553 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 605 transitions, 9486 flow [2024-06-20 17:51:50,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:51:50,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:51:50,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 221 transitions. [2024-06-20 17:51:50,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5525 [2024-06-20 17:51:50,554 INFO L175 Difference]: Start difference. First operand has 457 places, 577 transitions, 8149 flow. Second operand 10 states and 221 transitions. [2024-06-20 17:51:50,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 605 transitions, 9486 flow [2024-06-20 17:51:53,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 461 places, 605 transitions, 9270 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-20 17:51:53,153 INFO L231 Difference]: Finished difference. Result has 462 places, 578 transitions, 8201 flow [2024-06-20 17:51:53,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7933, PETRI_DIFFERENCE_MINUEND_PLACES=452, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=577, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=466, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8201, PETRI_PLACES=462, PETRI_TRANSITIONS=578} [2024-06-20 17:51:53,153 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 421 predicate places. [2024-06-20 17:51:53,154 INFO L495 AbstractCegarLoop]: Abstraction has has 462 places, 578 transitions, 8201 flow [2024-06-20 17:51:53,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:51:53,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:51:53,154 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:51:53,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-20 17:51:53,154 INFO L420 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:51:53,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:51:53,154 INFO L85 PathProgramCache]: Analyzing trace with hash 836413202, now seen corresponding path program 26 times [2024-06-20 17:51:53,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:51:53,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947135911] [2024-06-20 17:51:53,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:51:53,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:51:53,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:51:53,515 INFO 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 17:51:53,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:51:53,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947135911] [2024-06-20 17:51:53,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947135911] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:51:53,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:51:53,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:51:53,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312762130] [2024-06-20 17:51:53,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:51:53,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:51:53,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:51:53,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:51:53,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:51:53,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:51:53,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 462 places, 578 transitions, 8201 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:51:53,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:51:53,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:51:53,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:51:54,807 INFO L124 PetriNetUnfolderBase]: 3438/5781 cut-off events. [2024-06-20 17:51:54,807 INFO L125 PetriNetUnfolderBase]: For 582991/583001 co-relation queries the response was YES. [2024-06-20 17:51:54,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43310 conditions, 5781 events. 3438/5781 cut-off events. For 582991/583001 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 39431 event pairs, 757 based on Foata normal form. 18/5798 useless extension candidates. Maximal degree in co-relation 43115. Up to 4867 conditions per place. [2024-06-20 17:51:54,895 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 486 selfloop transitions, 123 changer transitions 0/616 dead transitions. [2024-06-20 17:51:54,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 616 transitions, 9555 flow [2024-06-20 17:51:54,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:51:54,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:51:54,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 217 transitions. [2024-06-20 17:51:54,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6027777777777777 [2024-06-20 17:51:54,896 INFO L175 Difference]: Start difference. First operand has 462 places, 578 transitions, 8201 flow. Second operand 9 states and 217 transitions. [2024-06-20 17:51:54,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 616 transitions, 9555 flow [2024-06-20 17:51:57,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 461 places, 616 transitions, 9315 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-20 17:51:57,621 INFO L231 Difference]: Finished difference. Result has 462 places, 578 transitions, 8221 flow [2024-06-20 17:51:57,621 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7961, PETRI_DIFFERENCE_MINUEND_PLACES=453, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=578, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=455, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8221, PETRI_PLACES=462, PETRI_TRANSITIONS=578} [2024-06-20 17:51:57,621 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 421 predicate places. [2024-06-20 17:51:57,622 INFO L495 AbstractCegarLoop]: Abstraction has has 462 places, 578 transitions, 8221 flow [2024-06-20 17:51:57,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:51:57,622 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:51:57,622 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:51:57,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-20 17:51:57,622 INFO L420 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:51:57,622 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:51:57,622 INFO L85 PathProgramCache]: Analyzing trace with hash 756934658, now seen corresponding path program 24 times [2024-06-20 17:51:57,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:51:57,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705945540] [2024-06-20 17:51:57,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:51:57,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:51:57,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:51:57,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:51:57,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:51:57,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705945540] [2024-06-20 17:51:57,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705945540] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:51:57,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:51:57,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:51:57,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730919677] [2024-06-20 17:51:57,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:51:57,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:51:57,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:51:57,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:51:57,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:51:58,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:51:58,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 462 places, 578 transitions, 8221 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:51:58,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:51:58,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:51:58,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:51:59,199 INFO L124 PetriNetUnfolderBase]: 3420/5755 cut-off events. [2024-06-20 17:51:59,199 INFO L125 PetriNetUnfolderBase]: For 518552/518562 co-relation queries the response was YES. [2024-06-20 17:51:59,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42095 conditions, 5755 events. 3420/5755 cut-off events. For 518552/518562 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 39346 event pairs, 763 based on Foata normal form. 18/5772 useless extension candidates. Maximal degree in co-relation 41900. Up to 5033 conditions per place. [2024-06-20 17:51:59,289 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 488 selfloop transitions, 106 changer transitions 0/601 dead transitions. [2024-06-20 17:51:59,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 601 transitions, 9507 flow [2024-06-20 17:51:59,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:51:59,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:51:59,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 200 transitions. [2024-06-20 17:51:59,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2024-06-20 17:51:59,290 INFO L175 Difference]: Start difference. First operand has 462 places, 578 transitions, 8221 flow. Second operand 9 states and 200 transitions. [2024-06-20 17:51:59,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 601 transitions, 9507 flow [2024-06-20 17:52:01,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 601 transitions, 9207 flow, removed 9 selfloop flow, removed 12 redundant places. [2024-06-20 17:52:01,556 INFO L231 Difference]: Finished difference. Result has 459 places, 578 transitions, 8141 flow [2024-06-20 17:52:01,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7921, PETRI_DIFFERENCE_MINUEND_PLACES=450, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=578, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=472, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8141, PETRI_PLACES=459, PETRI_TRANSITIONS=578} [2024-06-20 17:52:01,556 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 418 predicate places. [2024-06-20 17:52:01,557 INFO L495 AbstractCegarLoop]: Abstraction has has 459 places, 578 transitions, 8141 flow [2024-06-20 17:52:01,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:52:01,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:52:01,557 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:52:01,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2024-06-20 17:52:01,557 INFO L420 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:52:01,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:52:01,557 INFO L85 PathProgramCache]: Analyzing trace with hash 747699758, now seen corresponding path program 25 times [2024-06-20 17:52:01,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:52:01,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048561656] [2024-06-20 17:52:01,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:52:01,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:52:01,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:52:01,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:52:01,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:52:01,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048561656] [2024-06-20 17:52:01,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048561656] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:52:01,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:52:01,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:52:01,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211703180] [2024-06-20 17:52:01,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:52:01,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:52:01,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:52:01,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:52:01,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:52:01,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:52:01,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 578 transitions, 8141 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:52:01,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:52:01,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:52:01,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:52:03,247 INFO L124 PetriNetUnfolderBase]: 3440/5787 cut-off events. [2024-06-20 17:52:03,248 INFO L125 PetriNetUnfolderBase]: For 488408/488418 co-relation queries the response was YES. [2024-06-20 17:52:03,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41976 conditions, 5787 events. 3440/5787 cut-off events. For 488408/488418 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 39346 event pairs, 484 based on Foata normal form. 16/5802 useless extension candidates. Maximal degree in co-relation 41783. Up to 3960 conditions per place. [2024-06-20 17:52:03,331 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 453 selfloop transitions, 156 changer transitions 0/616 dead transitions. [2024-06-20 17:52:03,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 467 places, 616 transitions, 9814 flow [2024-06-20 17:52:03,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:52:03,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:52:03,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 214 transitions. [2024-06-20 17:52:03,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5944444444444444 [2024-06-20 17:52:03,332 INFO L175 Difference]: Start difference. First operand has 459 places, 578 transitions, 8141 flow. Second operand 9 states and 214 transitions. [2024-06-20 17:52:03,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 467 places, 616 transitions, 9814 flow [2024-06-20 17:52:05,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 616 transitions, 9531 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-06-20 17:52:05,640 INFO L231 Difference]: Finished difference. Result has 458 places, 579 transitions, 8215 flow [2024-06-20 17:52:05,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7862, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=578, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=423, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8215, PETRI_PLACES=458, PETRI_TRANSITIONS=579} [2024-06-20 17:52:05,640 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 417 predicate places. [2024-06-20 17:52:05,640 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 579 transitions, 8215 flow [2024-06-20 17:52:05,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:52:05,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:52:05,641 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:52:05,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2024-06-20 17:52:05,641 INFO L420 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:52:05,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:52:05,641 INFO L85 PathProgramCache]: Analyzing trace with hash 747699572, now seen corresponding path program 27 times [2024-06-20 17:52:05,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:52:05,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515168385] [2024-06-20 17:52:05,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:52:05,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:52:05,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:52:05,992 INFO 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 17:52:05,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:52:05,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515168385] [2024-06-20 17:52:05,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515168385] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:52:05,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:52:05,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:52:05,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354183200] [2024-06-20 17:52:05,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:52:05,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:52:05,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:52:05,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:52:05,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:52:06,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:52:06,057 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 579 transitions, 8215 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:52:06,057 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:52:06,057 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:52:06,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:52:07,287 INFO L124 PetriNetUnfolderBase]: 3427/5768 cut-off events. [2024-06-20 17:52:07,287 INFO L125 PetriNetUnfolderBase]: For 444366/444376 co-relation queries the response was YES. [2024-06-20 17:52:07,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41581 conditions, 5768 events. 3427/5768 cut-off events. For 444366/444376 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 39324 event pairs, 460 based on Foata normal form. 16/5783 useless extension candidates. Maximal degree in co-relation 41388. Up to 3997 conditions per place. [2024-06-20 17:52:07,377 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 460 selfloop transitions, 154 changer transitions 0/621 dead transitions. [2024-06-20 17:52:07,378 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 621 transitions, 9607 flow [2024-06-20 17:52:07,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:52:07,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:52:07,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 220 transitions. [2024-06-20 17:52:07,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-06-20 17:52:07,378 INFO L175 Difference]: Start difference. First operand has 458 places, 579 transitions, 8215 flow. Second operand 9 states and 220 transitions. [2024-06-20 17:52:07,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 621 transitions, 9607 flow [2024-06-20 17:52:09,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 621 transitions, 9285 flow, removed 16 selfloop flow, removed 11 redundant places. [2024-06-20 17:52:09,986 INFO L231 Difference]: Finished difference. Result has 456 places, 579 transitions, 8209 flow [2024-06-20 17:52:09,986 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7893, PETRI_DIFFERENCE_MINUEND_PLACES=447, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=579, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=425, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8209, PETRI_PLACES=456, PETRI_TRANSITIONS=579} [2024-06-20 17:52:09,986 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 415 predicate places. [2024-06-20 17:52:09,987 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 579 transitions, 8209 flow [2024-06-20 17:52:09,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:52:09,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:52:09,987 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:52:09,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2024-06-20 17:52:09,987 INFO L420 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:52:09,987 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:52:09,988 INFO L85 PathProgramCache]: Analyzing trace with hash 747936908, now seen corresponding path program 26 times [2024-06-20 17:52:09,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:52:09,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146870782] [2024-06-20 17:52:09,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:52:09,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:52:09,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:52:10,325 INFO 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 17:52:10,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:52:10,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146870782] [2024-06-20 17:52:10,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146870782] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:52:10,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:52:10,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:52:10,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754679066] [2024-06-20 17:52:10,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:52:10,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:52:10,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:52:10,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:52:10,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:52:10,383 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:52:10,384 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 579 transitions, 8209 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:52:10,384 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:52:10,384 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:52:10,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:52:11,576 INFO L124 PetriNetUnfolderBase]: 3414/5749 cut-off events. [2024-06-20 17:52:11,576 INFO L125 PetriNetUnfolderBase]: For 391911/391921 co-relation queries the response was YES. [2024-06-20 17:52:11,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40470 conditions, 5749 events. 3414/5749 cut-off events. For 391911/391921 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 39118 event pairs, 481 based on Foata normal form. 16/5764 useless extension candidates. Maximal degree in co-relation 40281. Up to 3935 conditions per place. [2024-06-20 17:52:11,665 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 445 selfloop transitions, 159 changer transitions 0/611 dead transitions. [2024-06-20 17:52:11,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 611 transitions, 9579 flow [2024-06-20 17:52:11,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:52:11,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:52:11,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 208 transitions. [2024-06-20 17:52:11,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5777777777777777 [2024-06-20 17:52:11,666 INFO L175 Difference]: Start difference. First operand has 456 places, 579 transitions, 8209 flow. Second operand 9 states and 208 transitions. [2024-06-20 17:52:11,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 464 places, 611 transitions, 9579 flow [2024-06-20 17:52:13,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 611 transitions, 9210 flow, removed 8 selfloop flow, removed 10 redundant places. [2024-06-20 17:52:13,797 INFO L231 Difference]: Finished difference. Result has 455 places, 579 transitions, 8166 flow [2024-06-20 17:52:13,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7840, PETRI_DIFFERENCE_MINUEND_PLACES=446, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=579, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8166, PETRI_PLACES=455, PETRI_TRANSITIONS=579} [2024-06-20 17:52:13,797 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 414 predicate places. [2024-06-20 17:52:13,798 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 579 transitions, 8166 flow [2024-06-20 17:52:13,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:52:13,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:52:13,798 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:52:13,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2024-06-20 17:52:13,798 INFO L420 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:52:13,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:52:13,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1507955516, now seen corresponding path program 1 times [2024-06-20 17:52:13,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:52:13,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494222803] [2024-06-20 17:52:13,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:52:13,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:52:13,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:52:14,167 INFO 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 17:52:14,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:52:14,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494222803] [2024-06-20 17:52:14,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494222803] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:52:14,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:52:14,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:52:14,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023340250] [2024-06-20 17:52:14,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:52:14,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:52:14,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:52:14,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:52:14,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:52:14,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:52:14,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 579 transitions, 8166 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:52:14,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:52:14,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:52:14,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:52:15,441 INFO L124 PetriNetUnfolderBase]: 3434/5785 cut-off events. [2024-06-20 17:52:15,441 INFO L125 PetriNetUnfolderBase]: For 386765/386775 co-relation queries the response was YES. [2024-06-20 17:52:15,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40628 conditions, 5785 events. 3434/5785 cut-off events. For 386765/386775 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 39603 event pairs, 704 based on Foata normal form. 16/5800 useless extension candidates. Maximal degree in co-relation 40439. Up to 4276 conditions per place. [2024-06-20 17:52:15,528 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 482 selfloop transitions, 133 changer transitions 0/622 dead transitions. [2024-06-20 17:52:15,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 622 transitions, 9822 flow [2024-06-20 17:52:15,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:52:15,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:52:15,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 218 transitions. [2024-06-20 17:52:15,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6055555555555555 [2024-06-20 17:52:15,529 INFO L175 Difference]: Start difference. First operand has 455 places, 579 transitions, 8166 flow. Second operand 9 states and 218 transitions. [2024-06-20 17:52:15,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 622 transitions, 9822 flow [2024-06-20 17:52:17,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 622 transitions, 9465 flow, removed 8 selfloop flow, removed 10 redundant places. [2024-06-20 17:52:17,440 INFO L231 Difference]: Finished difference. Result has 454 places, 580 transitions, 8103 flow [2024-06-20 17:52:17,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7813, PETRI_DIFFERENCE_MINUEND_PLACES=445, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=579, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=447, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8103, PETRI_PLACES=454, PETRI_TRANSITIONS=580} [2024-06-20 17:52:17,441 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 413 predicate places. [2024-06-20 17:52:17,441 INFO L495 AbstractCegarLoop]: Abstraction has has 454 places, 580 transitions, 8103 flow [2024-06-20 17:52:17,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:52:17,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:52:17,441 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:52:17,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2024-06-20 17:52:17,441 INFO L420 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:52:17,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:52:17,442 INFO L85 PathProgramCache]: Analyzing trace with hash 1508254046, now seen corresponding path program 2 times [2024-06-20 17:52:17,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:52:17,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309609584] [2024-06-20 17:52:17,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:52:17,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:52:17,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:52:17,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:52:17,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:52:17,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309609584] [2024-06-20 17:52:17,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309609584] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:52:17,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:52:17,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:52:17,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982683345] [2024-06-20 17:52:17,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:52:17,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:52:17,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:52:17,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:52:17,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:52:17,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:52:17,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 454 places, 580 transitions, 8103 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:52:17,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:52:17,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:52:17,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:52:19,117 INFO L124 PetriNetUnfolderBase]: 3454/5821 cut-off events. [2024-06-20 17:52:19,117 INFO L125 PetriNetUnfolderBase]: For 379591/379601 co-relation queries the response was YES. [2024-06-20 17:52:19,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40443 conditions, 5821 events. 3454/5821 cut-off events. For 379591/379601 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 39860 event pairs, 692 based on Foata normal form. 16/5836 useless extension candidates. Maximal degree in co-relation 40255. Up to 4288 conditions per place. [2024-06-20 17:52:19,205 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 479 selfloop transitions, 135 changer transitions 0/621 dead transitions. [2024-06-20 17:52:19,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 462 places, 621 transitions, 9771 flow [2024-06-20 17:52:19,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:52:19,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:52:19,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 217 transitions. [2024-06-20 17:52:19,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6027777777777777 [2024-06-20 17:52:19,206 INFO L175 Difference]: Start difference. First operand has 454 places, 580 transitions, 8103 flow. Second operand 9 states and 217 transitions. [2024-06-20 17:52:19,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 462 places, 621 transitions, 9771 flow [2024-06-20 17:52:21,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 621 transitions, 9393 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-20 17:52:21,194 INFO L231 Difference]: Finished difference. Result has 456 places, 581 transitions, 8021 flow [2024-06-20 17:52:21,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7734, PETRI_DIFFERENCE_MINUEND_PLACES=447, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=580, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=446, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8021, PETRI_PLACES=456, PETRI_TRANSITIONS=581} [2024-06-20 17:52:21,195 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 415 predicate places. [2024-06-20 17:52:21,195 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 581 transitions, 8021 flow [2024-06-20 17:52:21,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:52:21,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:52:21,195 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:52:21,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2024-06-20 17:52:21,195 INFO L420 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:52:21,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:52:21,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1508254418, now seen corresponding path program 1 times [2024-06-20 17:52:21,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:52:21,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410299458] [2024-06-20 17:52:21,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:52:21,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:52:21,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:52:21,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:52:21,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:52:21,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410299458] [2024-06-20 17:52:21,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410299458] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:52:21,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:52:21,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:52:21,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981422475] [2024-06-20 17:52:21,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:52:21,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:52:21,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:52:21,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:52:21,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:52:21,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:52:21,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 581 transitions, 8021 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:52:21,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:52:21,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:52:21,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:52:22,860 INFO L124 PetriNetUnfolderBase]: 3561/5998 cut-off events. [2024-06-20 17:52:22,860 INFO L125 PetriNetUnfolderBase]: For 434714/434724 co-relation queries the response was YES. [2024-06-20 17:52:22,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41779 conditions, 5998 events. 3561/5998 cut-off events. For 434714/434724 co-relation queries the response was YES. Maximal size of possible extension queue 514. Compared 41242 event pairs, 742 based on Foata normal form. 16/6013 useless extension candidates. Maximal degree in co-relation 41591. Up to 4977 conditions per place. [2024-06-20 17:52:22,953 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 515 selfloop transitions, 97 changer transitions 0/619 dead transitions. [2024-06-20 17:52:22,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 619 transitions, 9713 flow [2024-06-20 17:52:22,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:52:22,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:52:22,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 206 transitions. [2024-06-20 17:52:22,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5722222222222222 [2024-06-20 17:52:22,955 INFO L175 Difference]: Start difference. First operand has 456 places, 581 transitions, 8021 flow. Second operand 9 states and 206 transitions. [2024-06-20 17:52:22,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 464 places, 619 transitions, 9713 flow [2024-06-20 17:52:25,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 619 transitions, 9437 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-20 17:52:25,127 INFO L231 Difference]: Finished difference. Result has 460 places, 589 transitions, 8113 flow [2024-06-20 17:52:25,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7751, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=581, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=485, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8113, PETRI_PLACES=460, PETRI_TRANSITIONS=589} [2024-06-20 17:52:25,128 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 419 predicate places. [2024-06-20 17:52:25,128 INFO L495 AbstractCegarLoop]: Abstraction has has 460 places, 589 transitions, 8113 flow [2024-06-20 17:52:25,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:52:25,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:52:25,128 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:52:25,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2024-06-20 17:52:25,128 INFO L420 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:52:25,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:52:25,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1596820178, now seen corresponding path program 2 times [2024-06-20 17:52:25,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:52:25,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769964030] [2024-06-20 17:52:25,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:52:25,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:52:25,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:52:25,504 INFO 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 17:52:25,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:52:25,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769964030] [2024-06-20 17:52:25,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769964030] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:52:25,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:52:25,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:52:25,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968911574] [2024-06-20 17:52:25,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:52:25,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:52:25,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:52:25,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:52:25,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:52:25,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:52:25,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 460 places, 589 transitions, 8113 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:52:25,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:52:25,566 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:52:25,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:52:26,821 INFO L124 PetriNetUnfolderBase]: 3627/6098 cut-off events. [2024-06-20 17:52:26,821 INFO L125 PetriNetUnfolderBase]: For 494507/494517 co-relation queries the response was YES. [2024-06-20 17:52:26,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43486 conditions, 6098 events. 3627/6098 cut-off events. For 494507/494517 co-relation queries the response was YES. Maximal size of possible extension queue 518. Compared 42046 event pairs, 808 based on Foata normal form. 16/6113 useless extension candidates. Maximal degree in co-relation 43296. Up to 5297 conditions per place. [2024-06-20 17:52:26,917 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 520 selfloop transitions, 90 changer transitions 0/617 dead transitions. [2024-06-20 17:52:26,918 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 469 places, 617 transitions, 9737 flow [2024-06-20 17:52:26,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:52:26,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:52:26,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 221 transitions. [2024-06-20 17:52:26,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5525 [2024-06-20 17:52:26,919 INFO L175 Difference]: Start difference. First operand has 460 places, 589 transitions, 8113 flow. Second operand 10 states and 221 transitions. [2024-06-20 17:52:26,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 469 places, 617 transitions, 9737 flow [2024-06-20 17:52:29,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 617 transitions, 9612 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-20 17:52:29,591 INFO L231 Difference]: Finished difference. Result has 466 places, 592 transitions, 8257 flow [2024-06-20 17:52:29,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7990, PETRI_DIFFERENCE_MINUEND_PLACES=455, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=500, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8257, PETRI_PLACES=466, PETRI_TRANSITIONS=592} [2024-06-20 17:52:29,591 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 425 predicate places. [2024-06-20 17:52:29,592 INFO L495 AbstractCegarLoop]: Abstraction has has 466 places, 592 transitions, 8257 flow [2024-06-20 17:52:29,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:52:29,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:52:29,592 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:52:29,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2024-06-20 17:52:29,592 INFO L420 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:52:29,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:52:29,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1596968048, now seen corresponding path program 3 times [2024-06-20 17:52:29,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:52:29,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042494178] [2024-06-20 17:52:29,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:52:29,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:52:29,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:52:29,977 INFO 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 17:52:29,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:52:29,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042494178] [2024-06-20 17:52:29,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042494178] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:52:29,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:52:29,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:52:29,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634845353] [2024-06-20 17:52:29,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:52:29,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:52:29,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:52:29,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:52:29,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:52:30,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:52:30,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 466 places, 592 transitions, 8257 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:52:30,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:52:30,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:52:30,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:52:31,373 INFO L124 PetriNetUnfolderBase]: 3609/6074 cut-off events. [2024-06-20 17:52:31,373 INFO L125 PetriNetUnfolderBase]: For 458096/458106 co-relation queries the response was YES. [2024-06-20 17:52:31,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42631 conditions, 6074 events. 3609/6074 cut-off events. For 458096/458106 co-relation queries the response was YES. Maximal size of possible extension queue 518. Compared 41877 event pairs, 816 based on Foata normal form. 18/6091 useless extension candidates. Maximal degree in co-relation 42439. Up to 5351 conditions per place. [2024-06-20 17:52:31,455 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 521 selfloop transitions, 84 changer transitions 0/612 dead transitions. [2024-06-20 17:52:31,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 612 transitions, 9555 flow [2024-06-20 17:52:31,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:52:31,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:52:31,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 199 transitions. [2024-06-20 17:52:31,456 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5527777777777778 [2024-06-20 17:52:31,456 INFO L175 Difference]: Start difference. First operand has 466 places, 592 transitions, 8257 flow. Second operand 9 states and 199 transitions. [2024-06-20 17:52:31,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 612 transitions, 9555 flow [2024-06-20 17:52:33,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 467 places, 612 transitions, 9416 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-20 17:52:33,675 INFO L231 Difference]: Finished difference. Result has 468 places, 592 transitions, 8296 flow [2024-06-20 17:52:33,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8118, PETRI_DIFFERENCE_MINUEND_PLACES=459, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=592, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=508, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8296, PETRI_PLACES=468, PETRI_TRANSITIONS=592} [2024-06-20 17:52:33,675 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 427 predicate places. [2024-06-20 17:52:33,676 INFO L495 AbstractCegarLoop]: Abstraction has has 468 places, 592 transitions, 8296 flow [2024-06-20 17:52:33,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:52:33,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:52:33,676 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:52:33,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175 [2024-06-20 17:52:33,676 INFO L420 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:52:33,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:52:33,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1596819806, now seen corresponding path program 3 times [2024-06-20 17:52:33,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:52:33,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312195064] [2024-06-20 17:52:33,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:52:33,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:52:33,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:52:34,046 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 17:52:34,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:52:34,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312195064] [2024-06-20 17:52:34,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312195064] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:52:34,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:52:34,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:52:34,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181518258] [2024-06-20 17:52:34,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:52:34,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:52:34,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:52:34,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:52:34,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:52:34,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:52:34,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 468 places, 592 transitions, 8296 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:52:34,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:52:34,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:52:34,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:52:35,439 INFO L124 PetriNetUnfolderBase]: 3629/6106 cut-off events. [2024-06-20 17:52:35,440 INFO L125 PetriNetUnfolderBase]: For 444438/444448 co-relation queries the response was YES. [2024-06-20 17:52:35,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42835 conditions, 6106 events. 3629/6106 cut-off events. For 444438/444448 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 42151 event pairs, 812 based on Foata normal form. 16/6117 useless extension candidates. Maximal degree in co-relation 42642. Up to 5205 conditions per place. [2024-06-20 17:52:35,533 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 489 selfloop transitions, 130 changer transitions 0/626 dead transitions. [2024-06-20 17:52:35,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 477 places, 626 transitions, 9690 flow [2024-06-20 17:52:35,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:52:35,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:52:35,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 227 transitions. [2024-06-20 17:52:35,534 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5675 [2024-06-20 17:52:35,534 INFO L175 Difference]: Start difference. First operand has 468 places, 592 transitions, 8296 flow. Second operand 10 states and 227 transitions. [2024-06-20 17:52:35,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 477 places, 626 transitions, 9690 flow [2024-06-20 17:52:37,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 470 places, 626 transitions, 9528 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-20 17:52:37,618 INFO L231 Difference]: Finished difference. Result has 471 places, 593 transitions, 8415 flow [2024-06-20 17:52:37,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8134, PETRI_DIFFERENCE_MINUEND_PLACES=461, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=592, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=462, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8415, PETRI_PLACES=471, PETRI_TRANSITIONS=593} [2024-06-20 17:52:37,619 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 430 predicate places. [2024-06-20 17:52:37,619 INFO L495 AbstractCegarLoop]: Abstraction has has 471 places, 593 transitions, 8415 flow [2024-06-20 17:52:37,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:52:37,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:52:37,619 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:52:37,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176 [2024-06-20 17:52:37,620 INFO L420 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:52:37,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:52:37,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1017142608, now seen corresponding path program 4 times [2024-06-20 17:52:37,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:52:37,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609747464] [2024-06-20 17:52:37,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:52:37,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:52:37,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:52:37,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:52:37,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:52:37,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609747464] [2024-06-20 17:52:37,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609747464] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:52:37,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:52:37,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:52:37,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020250073] [2024-06-20 17:52:37,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:52:37,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:52:37,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:52:37,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:52:37,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:52:38,048 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:52:38,048 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 471 places, 593 transitions, 8415 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:52:38,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:52:38,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:52:38,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:52:39,301 INFO L124 PetriNetUnfolderBase]: 3657/6154 cut-off events. [2024-06-20 17:52:39,301 INFO L125 PetriNetUnfolderBase]: For 466582/466592 co-relation queries the response was YES. [2024-06-20 17:52:39,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43487 conditions, 6154 events. 3657/6154 cut-off events. For 466582/466592 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 42508 event pairs, 826 based on Foata normal form. 18/6171 useless extension candidates. Maximal degree in co-relation 43293. Up to 5464 conditions per place. [2024-06-20 17:52:39,401 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 544 selfloop transitions, 61 changer transitions 0/612 dead transitions. [2024-06-20 17:52:39,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 477 places, 612 transitions, 9738 flow [2024-06-20 17:52:39,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:52:39,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:52:39,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 162 transitions. [2024-06-20 17:52:39,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5785714285714286 [2024-06-20 17:52:39,402 INFO L175 Difference]: Start difference. First operand has 471 places, 593 transitions, 8415 flow. Second operand 7 states and 162 transitions. [2024-06-20 17:52:39,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 477 places, 612 transitions, 9738 flow [2024-06-20 17:52:41,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 469 places, 612 transitions, 9477 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-20 17:52:41,918 INFO L231 Difference]: Finished difference. Result has 470 places, 594 transitions, 8317 flow [2024-06-20 17:52:41,918 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8154, PETRI_DIFFERENCE_MINUEND_PLACES=463, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=593, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=532, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8317, PETRI_PLACES=470, PETRI_TRANSITIONS=594} [2024-06-20 17:52:41,918 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 429 predicate places. [2024-06-20 17:52:41,918 INFO L495 AbstractCegarLoop]: Abstraction has has 470 places, 594 transitions, 8317 flow [2024-06-20 17:52:41,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:52:41,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:52:41,918 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:52:41,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177 [2024-06-20 17:52:41,919 INFO L420 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:52:41,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:52:41,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1011780228, now seen corresponding path program 5 times [2024-06-20 17:52:41,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:52:41,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867318355] [2024-06-20 17:52:41,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:52:41,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:52:41,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:52:42,314 INFO 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 17:52:42,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:52:42,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867318355] [2024-06-20 17:52:42,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867318355] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:52:42,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:52:42,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:52:42,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047477727] [2024-06-20 17:52:42,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:52:42,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:52:42,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:52:42,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:52:42,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:52:42,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:52:42,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 594 transitions, 8317 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:52:42,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:52:42,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:52:42,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:52:43,672 INFO L124 PetriNetUnfolderBase]: 3685/6202 cut-off events. [2024-06-20 17:52:43,672 INFO L125 PetriNetUnfolderBase]: For 474097/474107 co-relation queries the response was YES. [2024-06-20 17:52:43,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43780 conditions, 6202 events. 3685/6202 cut-off events. For 474097/474107 co-relation queries the response was YES. Maximal size of possible extension queue 524. Compared 42952 event pairs, 832 based on Foata normal form. 18/6219 useless extension candidates. Maximal degree in co-relation 43585. Up to 5508 conditions per place. [2024-06-20 17:52:43,763 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 546 selfloop transitions, 61 changer transitions 0/614 dead transitions. [2024-06-20 17:52:43,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 477 places, 614 transitions, 9648 flow [2024-06-20 17:52:43,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:52:43,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:52:43,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-20 17:52:43,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-06-20 17:52:43,764 INFO L175 Difference]: Start difference. First operand has 470 places, 594 transitions, 8317 flow. Second operand 8 states and 180 transitions. [2024-06-20 17:52:43,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 477 places, 614 transitions, 9648 flow [2024-06-20 17:52:45,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 472 places, 614 transitions, 9520 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-20 17:52:45,952 INFO L231 Difference]: Finished difference. Result has 473 places, 595 transitions, 8354 flow [2024-06-20 17:52:45,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8189, PETRI_DIFFERENCE_MINUEND_PLACES=465, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=594, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=533, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8354, PETRI_PLACES=473, PETRI_TRANSITIONS=595} [2024-06-20 17:52:45,953 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 432 predicate places. [2024-06-20 17:52:45,953 INFO L495 AbstractCegarLoop]: Abstraction has has 473 places, 595 transitions, 8354 flow [2024-06-20 17:52:45,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:52:45,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:52:45,953 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:52:45,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178 [2024-06-20 17:52:45,953 INFO L420 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:52:45,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:52:45,954 INFO L85 PathProgramCache]: Analyzing trace with hash -1017290478, now seen corresponding path program 6 times [2024-06-20 17:52:45,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:52:45,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900852517] [2024-06-20 17:52:45,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:52:45,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:52:45,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:52:46,344 INFO 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 17:52:46,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:52:46,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900852517] [2024-06-20 17:52:46,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900852517] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:52:46,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:52:46,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:52:46,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967116265] [2024-06-20 17:52:46,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:52:46,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:52:46,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:52:46,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:52:46,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:52:46,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:52:46,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 473 places, 595 transitions, 8354 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:52:46,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:52:46,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:52:46,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:52:47,742 INFO L124 PetriNetUnfolderBase]: 3730/6273 cut-off events. [2024-06-20 17:52:47,742 INFO L125 PetriNetUnfolderBase]: For 469550/469560 co-relation queries the response was YES. [2024-06-20 17:52:47,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44305 conditions, 6273 events. 3730/6273 cut-off events. For 469550/469560 co-relation queries the response was YES. Maximal size of possible extension queue 527. Compared 43401 event pairs, 760 based on Foata normal form. 16/6288 useless extension candidates. Maximal degree in co-relation 44109. Up to 5408 conditions per place. [2024-06-20 17:52:47,842 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 548 selfloop transitions, 69 changer transitions 0/624 dead transitions. [2024-06-20 17:52:47,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 479 places, 624 transitions, 9788 flow [2024-06-20 17:52:47,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:52:47,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:52:47,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-20 17:52:47,843 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-20 17:52:47,844 INFO L175 Difference]: Start difference. First operand has 473 places, 595 transitions, 8354 flow. Second operand 7 states and 168 transitions. [2024-06-20 17:52:47,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 479 places, 624 transitions, 9788 flow [2024-06-20 17:52:50,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 473 places, 624 transitions, 9658 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-20 17:52:50,435 INFO L231 Difference]: Finished difference. Result has 475 places, 600 transitions, 8487 flow [2024-06-20 17:52:50,436 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8224, PETRI_DIFFERENCE_MINUEND_PLACES=467, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=595, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=526, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8487, PETRI_PLACES=475, PETRI_TRANSITIONS=600} [2024-06-20 17:52:50,436 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 434 predicate places. [2024-06-20 17:52:50,436 INFO L495 AbstractCegarLoop]: Abstraction has has 475 places, 600 transitions, 8487 flow [2024-06-20 17:52:50,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:52:50,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:52:50,437 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:52:50,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179 [2024-06-20 17:52:50,437 INFO L420 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:52:50,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:52:50,437 INFO L85 PathProgramCache]: Analyzing trace with hash -1017290850, now seen corresponding path program 4 times [2024-06-20 17:52:50,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:52:50,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617453877] [2024-06-20 17:52:50,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:52:50,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:52:50,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:52:50,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:52:50,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:52:50,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617453877] [2024-06-20 17:52:50,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617453877] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:52:50,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:52:50,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:52:50,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932551517] [2024-06-20 17:52:50,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:52:50,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:52:50,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:52:50,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:52:50,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:52:50,870 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:52:50,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 475 places, 600 transitions, 8487 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:52:50,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:52:50,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:52:50,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:52:52,229 INFO L124 PetriNetUnfolderBase]: 3717/6256 cut-off events. [2024-06-20 17:52:52,229 INFO L125 PetriNetUnfolderBase]: For 437380/437390 co-relation queries the response was YES. [2024-06-20 17:52:52,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43739 conditions, 6256 events. 3717/6256 cut-off events. For 437380/437390 co-relation queries the response was YES. Maximal size of possible extension queue 527. Compared 43345 event pairs, 721 based on Foata normal form. 16/6271 useless extension candidates. Maximal degree in co-relation 43541. Up to 4979 conditions per place. [2024-06-20 17:52:52,325 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 514 selfloop transitions, 112 changer transitions 0/633 dead transitions. [2024-06-20 17:52:52,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 481 places, 633 transitions, 9883 flow [2024-06-20 17:52:52,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:52:52,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:52:52,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-20 17:52:52,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6321428571428571 [2024-06-20 17:52:52,327 INFO L175 Difference]: Start difference. First operand has 475 places, 600 transitions, 8487 flow. Second operand 7 states and 177 transitions. [2024-06-20 17:52:52,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 481 places, 633 transitions, 9883 flow [2024-06-20 17:52:54,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 476 places, 633 transitions, 9746 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-20 17:52:54,592 INFO L231 Difference]: Finished difference. Result has 477 places, 600 transitions, 8584 flow [2024-06-20 17:52:54,592 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8350, PETRI_DIFFERENCE_MINUEND_PLACES=470, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=600, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=488, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8584, PETRI_PLACES=477, PETRI_TRANSITIONS=600} [2024-06-20 17:52:54,592 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 436 predicate places. [2024-06-20 17:52:54,592 INFO L495 AbstractCegarLoop]: Abstraction has has 477 places, 600 transitions, 8584 flow [2024-06-20 17:52:54,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:52:54,593 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:52:54,593 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:52:54,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180 [2024-06-20 17:52:54,593 INFO L420 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:52:54,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:52:54,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1011565212, now seen corresponding path program 1 times [2024-06-20 17:52:54,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:52:54,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532587033] [2024-06-20 17:52:54,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:52:54,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:52:54,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:52:54,968 INFO 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 17:52:54,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:52:54,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532587033] [2024-06-20 17:52:54,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532587033] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:52:54,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:52:54,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:52:54,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489687831] [2024-06-20 17:52:54,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:52:54,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:52:54,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:52:54,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:52:54,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:52:55,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:52:55,022 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 477 places, 600 transitions, 8584 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:52:55,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:52:55,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:52:55,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:52:56,323 INFO L124 PetriNetUnfolderBase]: 3753/6318 cut-off events. [2024-06-20 17:52:56,323 INFO L125 PetriNetUnfolderBase]: For 439530/439540 co-relation queries the response was YES. [2024-06-20 17:52:56,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44117 conditions, 6318 events. 3753/6318 cut-off events. For 439530/439540 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 43766 event pairs, 743 based on Foata normal form. 16/6333 useless extension candidates. Maximal degree in co-relation 43919. Up to 5382 conditions per place. [2024-06-20 17:52:56,423 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 529 selfloop transitions, 94 changer transitions 0/630 dead transitions. [2024-06-20 17:52:56,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 484 places, 630 transitions, 10006 flow [2024-06-20 17:52:56,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:52:56,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:52:56,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-20 17:52:56,425 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.58125 [2024-06-20 17:52:56,425 INFO L175 Difference]: Start difference. First operand has 477 places, 600 transitions, 8584 flow. Second operand 8 states and 186 transitions. [2024-06-20 17:52:56,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 484 places, 630 transitions, 10006 flow [2024-06-20 17:52:58,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 476 places, 630 transitions, 9698 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-20 17:52:58,818 INFO L231 Difference]: Finished difference. Result has 478 places, 605 transitions, 8568 flow [2024-06-20 17:52:58,818 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8276, PETRI_DIFFERENCE_MINUEND_PLACES=469, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=600, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=506, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8568, PETRI_PLACES=478, PETRI_TRANSITIONS=605} [2024-06-20 17:52:58,818 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 437 predicate places. [2024-06-20 17:52:58,818 INFO L495 AbstractCegarLoop]: Abstraction has has 478 places, 605 transitions, 8568 flow [2024-06-20 17:52:58,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:52:58,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:52:58,819 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:52:58,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181 [2024-06-20 17:52:58,819 INFO L420 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:52:58,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:52:58,819 INFO L85 PathProgramCache]: Analyzing trace with hash -1011565026, now seen corresponding path program 1 times [2024-06-20 17:52:58,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:52:58,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368625591] [2024-06-20 17:52:58,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:52:58,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:52:58,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:52:59,205 INFO 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 17:52:59,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:52:59,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368625591] [2024-06-20 17:52:59,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368625591] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:52:59,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:52:59,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:52:59,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958665351] [2024-06-20 17:52:59,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:52:59,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:52:59,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:52:59,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:52:59,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:52:59,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:52:59,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 478 places, 605 transitions, 8568 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:52:59,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:52:59,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:52:59,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:53:00,689 INFO L124 PetriNetUnfolderBase]: 3773/6346 cut-off events. [2024-06-20 17:53:00,689 INFO L125 PetriNetUnfolderBase]: For 432610/432620 co-relation queries the response was YES. [2024-06-20 17:53:00,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44236 conditions, 6346 events. 3773/6346 cut-off events. For 432610/432620 co-relation queries the response was YES. Maximal size of possible extension queue 533. Compared 43979 event pairs, 800 based on Foata normal form. 16/6361 useless extension candidates. Maximal degree in co-relation 44037. Up to 5482 conditions per place. [2024-06-20 17:53:00,786 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 546 selfloop transitions, 75 changer transitions 0/628 dead transitions. [2024-06-20 17:53:00,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 485 places, 628 transitions, 9948 flow [2024-06-20 17:53:00,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:53:00,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:53:00,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-20 17:53:00,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.571875 [2024-06-20 17:53:00,787 INFO L175 Difference]: Start difference. First operand has 478 places, 605 transitions, 8568 flow. Second operand 8 states and 183 transitions. [2024-06-20 17:53:00,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 485 places, 628 transitions, 9948 flow [2024-06-20 17:53:02,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 479 places, 628 transitions, 9778 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-20 17:53:02,871 INFO L231 Difference]: Finished difference. Result has 480 places, 606 transitions, 8584 flow [2024-06-20 17:53:02,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8398, PETRI_DIFFERENCE_MINUEND_PLACES=472, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=605, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=530, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8584, PETRI_PLACES=480, PETRI_TRANSITIONS=606} [2024-06-20 17:53:02,871 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 439 predicate places. [2024-06-20 17:53:02,872 INFO L495 AbstractCegarLoop]: Abstraction has has 480 places, 606 transitions, 8584 flow [2024-06-20 17:53:02,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:53:02,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:53:02,872 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:53:02,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182 [2024-06-20 17:53:02,872 INFO L420 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:53:02,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:53:02,873 INFO L85 PathProgramCache]: Analyzing trace with hash -1132526266, now seen corresponding path program 2 times [2024-06-20 17:53:02,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:53:02,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636174535] [2024-06-20 17:53:02,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:53:02,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:53:02,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:53:03,242 INFO 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 17:53:03,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:53:03,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636174535] [2024-06-20 17:53:03,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636174535] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:53:03,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:53:03,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:53:03,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853680239] [2024-06-20 17:53:03,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:53:03,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:53:03,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:53:03,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:53:03,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:53:03,324 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:53:03,324 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 480 places, 606 transitions, 8584 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:53:03,324 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:53:03,324 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:53:03,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:53:04,783 INFO L124 PetriNetUnfolderBase]: 3793/6378 cut-off events. [2024-06-20 17:53:04,783 INFO L125 PetriNetUnfolderBase]: For 433507/433517 co-relation queries the response was YES. [2024-06-20 17:53:04,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44417 conditions, 6378 events. 3793/6378 cut-off events. For 433507/433517 co-relation queries the response was YES. Maximal size of possible extension queue 534. Compared 44194 event pairs, 804 based on Foata normal form. 16/6393 useless extension candidates. Maximal degree in co-relation 44218. Up to 5736 conditions per place. [2024-06-20 17:53:04,899 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 576 selfloop transitions, 40 changer transitions 0/623 dead transitions. [2024-06-20 17:53:04,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 486 places, 623 transitions, 9898 flow [2024-06-20 17:53:04,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:53:04,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:53:04,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 156 transitions. [2024-06-20 17:53:04,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5571428571428572 [2024-06-20 17:53:04,900 INFO L175 Difference]: Start difference. First operand has 480 places, 606 transitions, 8584 flow. Second operand 7 states and 156 transitions. [2024-06-20 17:53:04,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 486 places, 623 transitions, 9898 flow [2024-06-20 17:53:07,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 479 places, 623 transitions, 9731 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-20 17:53:07,094 INFO L231 Difference]: Finished difference. Result has 480 places, 607 transitions, 8527 flow [2024-06-20 17:53:07,094 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8417, PETRI_DIFFERENCE_MINUEND_PLACES=473, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=606, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=566, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8527, PETRI_PLACES=480, PETRI_TRANSITIONS=607} [2024-06-20 17:53:07,094 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 439 predicate places. [2024-06-20 17:53:07,095 INFO L495 AbstractCegarLoop]: Abstraction has has 480 places, 607 transitions, 8527 flow [2024-06-20 17:53:07,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:53:07,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:53:07,095 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:53:07,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183 [2024-06-20 17:53:07,095 INFO L420 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:53:07,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:53:07,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1132646236, now seen corresponding path program 3 times [2024-06-20 17:53:07,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:53:07,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58930843] [2024-06-20 17:53:07,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:53:07,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:53:07,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:53:07,454 INFO 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 17:53:07,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:53:07,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58930843] [2024-06-20 17:53:07,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58930843] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:53:07,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:53:07,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 17:53:07,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673041444] [2024-06-20 17:53:07,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:53:07,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 17:53:07,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:53:07,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 17:53:07,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 17:53:07,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:53:07,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 480 places, 607 transitions, 8527 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:53:07,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:53:07,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:53:07,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:53:08,832 INFO L124 PetriNetUnfolderBase]: 3813/6407 cut-off events. [2024-06-20 17:53:08,833 INFO L125 PetriNetUnfolderBase]: For 433172/433178 co-relation queries the response was YES. [2024-06-20 17:53:08,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44440 conditions, 6407 events. 3813/6407 cut-off events. For 433172/433178 co-relation queries the response was YES. Maximal size of possible extension queue 537. Compared 44341 event pairs, 835 based on Foata normal form. 9/6414 useless extension candidates. Maximal degree in co-relation 44241. Up to 5046 conditions per place. [2024-06-20 17:53:08,932 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 500 selfloop transitions, 122 changer transitions 0/629 dead transitions. [2024-06-20 17:53:08,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 486 places, 629 transitions, 9931 flow [2024-06-20 17:53:08,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:53:08,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:53:08,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 162 transitions. [2024-06-20 17:53:08,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5785714285714286 [2024-06-20 17:53:08,933 INFO L175 Difference]: Start difference. First operand has 480 places, 607 transitions, 8527 flow. Second operand 7 states and 162 transitions. [2024-06-20 17:53:08,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 486 places, 629 transitions, 9931 flow [2024-06-20 17:53:11,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 479 places, 629 transitions, 9731 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-20 17:53:11,027 INFO L231 Difference]: Finished difference. Result has 480 places, 608 transitions, 8603 flow [2024-06-20 17:53:11,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8327, PETRI_DIFFERENCE_MINUEND_PLACES=473, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=607, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=485, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8603, PETRI_PLACES=480, PETRI_TRANSITIONS=608} [2024-06-20 17:53:11,028 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 439 predicate places. [2024-06-20 17:53:11,028 INFO L495 AbstractCegarLoop]: Abstraction has has 480 places, 608 transitions, 8603 flow [2024-06-20 17:53:11,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:53:11,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:53:11,028 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:53:11,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184 [2024-06-20 17:53:11,028 INFO L420 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:53:11,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:53:11,029 INFO L85 PathProgramCache]: Analyzing trace with hash 171123714, now seen corresponding path program 27 times [2024-06-20 17:53:11,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:53:11,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70935075] [2024-06-20 17:53:11,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:53:11,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:53:11,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:53:11,457 INFO 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 17:53:11,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:53:11,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70935075] [2024-06-20 17:53:11,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70935075] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:53:11,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:53:11,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:53:11,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475379906] [2024-06-20 17:53:11,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:53:11,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:53:11,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:53:11,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:53:11,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:53:11,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-20 17:53:11,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 480 places, 608 transitions, 8603 flow. Second operand has 11 states, 11 states have (on average 14.545454545454545) internal successors, (160), 11 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:53:11,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:53:11,528 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-20 17:53:11,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:53:12,857 INFO L124 PetriNetUnfolderBase]: 3841/6454 cut-off events. [2024-06-20 17:53:12,857 INFO L125 PetriNetUnfolderBase]: For 454486/454488 co-relation queries the response was YES. [2024-06-20 17:53:12,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44840 conditions, 6454 events. 3841/6454 cut-off events. For 454486/454488 co-relation queries the response was YES. Maximal size of possible extension queue 540. Compared 44826 event pairs, 843 based on Foata normal form. 10/6463 useless extension candidates. Maximal degree in co-relation 44641. Up to 5767 conditions per place. [2024-06-20 17:53:12,961 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 563 selfloop transitions, 69 changer transitions 0/638 dead transitions. [2024-06-20 17:53:12,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 488 places, 638 transitions, 10071 flow [2024-06-20 17:53:12,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:53:12,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:53:12,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 194 transitions. [2024-06-20 17:53:12,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5388888888888889 [2024-06-20 17:53:12,963 INFO L175 Difference]: Start difference. First operand has 480 places, 608 transitions, 8603 flow. Second operand 9 states and 194 transitions. [2024-06-20 17:53:12,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 488 places, 638 transitions, 10071 flow [2024-06-20 17:53:15,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 483 places, 638 transitions, 9811 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-20 17:53:15,256 INFO L231 Difference]: Finished difference. Result has 484 places, 609 transitions, 8519 flow [2024-06-20 17:53:15,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8343, PETRI_DIFFERENCE_MINUEND_PLACES=475, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=608, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=539, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8519, PETRI_PLACES=484, PETRI_TRANSITIONS=609} [2024-06-20 17:53:15,256 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 443 predicate places. [2024-06-20 17:53:15,257 INFO L495 AbstractCegarLoop]: Abstraction has has 484 places, 609 transitions, 8519 flow [2024-06-20 17:53:15,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.545454545454545) internal successors, (160), 11 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:53:15,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:53:15,257 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:53:15,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185 [2024-06-20 17:53:15,257 INFO L420 AbstractCegarLoop]: === Iteration 187 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:53:15,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:53:15,258 INFO L85 PathProgramCache]: Analyzing trace with hash -580337854, now seen corresponding path program 28 times [2024-06-20 17:53:15,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:53:15,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109391452] [2024-06-20 17:53:15,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:53:15,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:53:15,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:53:15,643 INFO 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 17:53:15,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:53:15,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109391452] [2024-06-20 17:53:15,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109391452] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:53:15,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:53:15,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:53:15,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39439543] [2024-06-20 17:53:15,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:53:15,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:53:15,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:53:15,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:53:15,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:53:15,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:53:15,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 484 places, 609 transitions, 8519 flow. Second operand has 10 states, 10 states have (on average 15.6) internal successors, (156), 10 states have internal predecessors, (156), 0 states have call successors, (0), 0 states 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 17:53:15,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:53:15,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:53:15,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:53:17,106 INFO L124 PetriNetUnfolderBase]: 3869/6498 cut-off events. [2024-06-20 17:53:17,106 INFO L125 PetriNetUnfolderBase]: For 460364/460366 co-relation queries the response was YES. [2024-06-20 17:53:17,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44950 conditions, 6498 events. 3869/6498 cut-off events. For 460364/460366 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 45148 event pairs, 849 based on Foata normal form. 10/6507 useless extension candidates. Maximal degree in co-relation 44751. Up to 5755 conditions per place. [2024-06-20 17:53:17,209 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 509 selfloop transitions, 119 changer transitions 0/635 dead transitions. [2024-06-20 17:53:17,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 493 places, 635 transitions, 9910 flow [2024-06-20 17:53:17,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:53:17,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:53:17,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 219 transitions. [2024-06-20 17:53:17,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5475 [2024-06-20 17:53:17,211 INFO L175 Difference]: Start difference. First operand has 484 places, 609 transitions, 8519 flow. Second operand 10 states and 219 transitions. [2024-06-20 17:53:17,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 493 places, 635 transitions, 9910 flow [2024-06-20 17:53:19,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 486 places, 635 transitions, 9762 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-20 17:53:19,535 INFO L231 Difference]: Finished difference. Result has 487 places, 610 transitions, 8646 flow [2024-06-20 17:53:19,535 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8371, PETRI_DIFFERENCE_MINUEND_PLACES=477, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=609, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=490, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8646, PETRI_PLACES=487, PETRI_TRANSITIONS=610} [2024-06-20 17:53:19,535 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 446 predicate places. [2024-06-20 17:53:19,536 INFO L495 AbstractCegarLoop]: Abstraction has has 487 places, 610 transitions, 8646 flow [2024-06-20 17:53:19,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.6) internal successors, (156), 10 states have internal predecessors, (156), 0 states have call successors, (0), 0 states 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 17:53:19,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:53:19,536 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:53:19,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186 [2024-06-20 17:53:19,536 INFO L420 AbstractCegarLoop]: === Iteration 188 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:53:19,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:53:19,536 INFO L85 PathProgramCache]: Analyzing trace with hash -583194814, now seen corresponding path program 29 times [2024-06-20 17:53:19,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:53:19,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539500600] [2024-06-20 17:53:19,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:53:19,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:53:19,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:53:19,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:53:19,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:53:19,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539500600] [2024-06-20 17:53:19,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539500600] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:53:19,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:53:19,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:53:19,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436707092] [2024-06-20 17:53:19,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:53:19,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:53:19,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:53:19,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:53:19,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:53:19,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:53:19,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 487 places, 610 transitions, 8646 flow. Second operand has 10 states, 10 states have (on average 15.6) internal successors, (156), 10 states have internal predecessors, (156), 0 states have call successors, (0), 0 states 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 17:53:19,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:53:19,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:53:19,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:53:21,587 INFO L124 PetriNetUnfolderBase]: 3930/6593 cut-off events. [2024-06-20 17:53:21,588 INFO L125 PetriNetUnfolderBase]: For 510402/510404 co-relation queries the response was YES. [2024-06-20 17:53:21,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46570 conditions, 6593 events. 3930/6593 cut-off events. For 510402/510404 co-relation queries the response was YES. Maximal size of possible extension queue 550. Compared 45941 event pairs, 858 based on Foata normal form. 10/6602 useless extension candidates. Maximal degree in co-relation 46370. Up to 5692 conditions per place. [2024-06-20 17:53:21,680 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 513 selfloop transitions, 122 changer transitions 0/642 dead transitions. [2024-06-20 17:53:21,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 496 places, 642 transitions, 10373 flow [2024-06-20 17:53:21,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:53:21,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:53:21,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 223 transitions. [2024-06-20 17:53:21,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5575 [2024-06-20 17:53:21,682 INFO L175 Difference]: Start difference. First operand has 487 places, 610 transitions, 8646 flow. Second operand 10 states and 223 transitions. [2024-06-20 17:53:21,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 496 places, 642 transitions, 10373 flow [2024-06-20 17:53:24,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 488 places, 642 transitions, 10120 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-20 17:53:24,058 INFO L231 Difference]: Finished difference. Result has 489 places, 612 transitions, 8707 flow [2024-06-20 17:53:24,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8393, PETRI_DIFFERENCE_MINUEND_PLACES=479, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=610, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=489, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8707, PETRI_PLACES=489, PETRI_TRANSITIONS=612} [2024-06-20 17:53:24,058 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 448 predicate places. [2024-06-20 17:53:24,058 INFO L495 AbstractCegarLoop]: Abstraction has has 489 places, 612 transitions, 8707 flow [2024-06-20 17:53:24,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.6) internal successors, (156), 10 states have internal predecessors, (156), 0 states have call successors, (0), 0 states 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 17:53:24,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:53:24,059 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:53:24,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187 [2024-06-20 17:53:24,059 INFO L420 AbstractCegarLoop]: === Iteration 189 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:53:24,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:53:24,059 INFO L85 PathProgramCache]: Analyzing trace with hash -465046684, now seen corresponding path program 30 times [2024-06-20 17:53:24,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:53:24,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014493152] [2024-06-20 17:53:24,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:53:24,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:53:24,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:53:24,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:53:24,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:53:24,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014493152] [2024-06-20 17:53:24,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014493152] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:53:24,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:53:24,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:53:24,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746675894] [2024-06-20 17:53:24,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:53:24,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:53:24,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:53:24,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:53:24,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:53:24,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:53:24,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 489 places, 612 transitions, 8707 flow. Second operand has 10 states, 10 states have (on average 15.6) internal successors, (156), 10 states have internal predecessors, (156), 0 states have call successors, (0), 0 states 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 17:53:24,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:53:24,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:53:24,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:53:26,022 INFO L124 PetriNetUnfolderBase]: 3912/6567 cut-off events. [2024-06-20 17:53:26,022 INFO L125 PetriNetUnfolderBase]: For 462794/462796 co-relation queries the response was YES. [2024-06-20 17:53:26,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45423 conditions, 6567 events. 3912/6567 cut-off events. For 462794/462796 co-relation queries the response was YES. Maximal size of possible extension queue 550. Compared 45768 event pairs, 866 based on Foata normal form. 10/6576 useless extension candidates. Maximal degree in co-relation 45222. Up to 5947 conditions per place. [2024-06-20 17:53:26,139 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 587 selfloop transitions, 43 changer transitions 0/637 dead transitions. [2024-06-20 17:53:26,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 498 places, 637 transitions, 10072 flow [2024-06-20 17:53:26,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:53:26,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:53:26,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 216 transitions. [2024-06-20 17:53:26,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.54 [2024-06-20 17:53:26,141 INFO L175 Difference]: Start difference. First operand has 489 places, 612 transitions, 8707 flow. Second operand 10 states and 216 transitions. [2024-06-20 17:53:26,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 498 places, 637 transitions, 10072 flow [2024-06-20 17:53:29,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 492 places, 637 transitions, 9898 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-20 17:53:29,030 INFO L231 Difference]: Finished difference. Result has 493 places, 612 transitions, 8624 flow [2024-06-20 17:53:29,030 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8533, PETRI_DIFFERENCE_MINUEND_PLACES=483, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=612, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=569, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8624, PETRI_PLACES=493, PETRI_TRANSITIONS=612} [2024-06-20 17:53:29,030 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 452 predicate places. [2024-06-20 17:53:29,030 INFO L495 AbstractCegarLoop]: Abstraction has has 493 places, 612 transitions, 8624 flow [2024-06-20 17:53:29,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.6) internal successors, (156), 10 states have internal predecessors, (156), 0 states have call successors, (0), 0 states 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 17:53:29,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:53:29,030 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:53:29,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188 [2024-06-20 17:53:29,031 INFO L420 AbstractCegarLoop]: === Iteration 190 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:53:29,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:53:29,031 INFO L85 PathProgramCache]: Analyzing trace with hash -555158446, now seen corresponding path program 7 times [2024-06-20 17:53:29,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:53:29,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837933855] [2024-06-20 17:53:29,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:53:29,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:53:29,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:53:29,468 INFO 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 17:53:29,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:53:29,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837933855] [2024-06-20 17:53:29,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837933855] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:53:29,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:53:29,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:53:29,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694163246] [2024-06-20 17:53:29,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:53:29,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:53:29,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:53:29,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:53:29,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:53:29,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-20 17:53:29,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 493 places, 612 transitions, 8624 flow. Second operand has 11 states, 11 states have (on average 14.545454545454545) internal successors, (160), 11 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:53:29,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:53:29,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-20 17:53:29,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:53:31,041 INFO L124 PetriNetUnfolderBase]: 3998/6713 cut-off events. [2024-06-20 17:53:31,042 INFO L125 PetriNetUnfolderBase]: For 539556/539566 co-relation queries the response was YES. [2024-06-20 17:53:31,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47865 conditions, 6713 events. 3998/6713 cut-off events. For 539556/539566 co-relation queries the response was YES. Maximal size of possible extension queue 553. Compared 46897 event pairs, 808 based on Foata normal form. 16/6728 useless extension candidates. Maximal degree in co-relation 47661. Up to 5673 conditions per place. [2024-06-20 17:53:31,151 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 565 selfloop transitions, 71 changer transitions 0/642 dead transitions. [2024-06-20 17:53:31,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 500 places, 642 transitions, 10331 flow [2024-06-20 17:53:31,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:53:31,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:53:31,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 177 transitions. [2024-06-20 17:53:31,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.553125 [2024-06-20 17:53:31,153 INFO L175 Difference]: Start difference. First operand has 493 places, 612 transitions, 8624 flow. Second operand 8 states and 177 transitions. [2024-06-20 17:53:31,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 500 places, 642 transitions, 10331 flow [2024-06-20 17:53:33,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 491 places, 642 transitions, 10232 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-20 17:53:33,542 INFO L231 Difference]: Finished difference. Result has 493 places, 615 transitions, 8782 flow [2024-06-20 17:53:33,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8525, PETRI_DIFFERENCE_MINUEND_PLACES=484, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=612, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=542, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8782, PETRI_PLACES=493, PETRI_TRANSITIONS=615} [2024-06-20 17:53:33,543 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 452 predicate places. [2024-06-20 17:53:33,543 INFO L495 AbstractCegarLoop]: Abstraction has has 493 places, 615 transitions, 8782 flow [2024-06-20 17:53:33,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.545454545454545) internal successors, (160), 11 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:53:33,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:53:33,543 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:53:33,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable189 [2024-06-20 17:53:33,544 INFO L420 AbstractCegarLoop]: === Iteration 191 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:53:33,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:53:33,544 INFO L85 PathProgramCache]: Analyzing trace with hash -200479696, now seen corresponding path program 8 times [2024-06-20 17:53:33,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:53:33,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441911088] [2024-06-20 17:53:33,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:53:33,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:53:33,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:53:33,962 INFO 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 17:53:33,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:53:33,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441911088] [2024-06-20 17:53:33,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441911088] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:53:33,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:53:33,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:53:33,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979998533] [2024-06-20 17:53:33,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:53:33,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:53:33,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:53:33,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:53:33,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:53:34,023 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-20 17:53:34,023 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 493 places, 615 transitions, 8782 flow. Second operand has 11 states, 11 states have (on average 14.545454545454545) internal successors, (160), 11 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:53:34,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:53:34,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-20 17:53:34,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:53:35,534 INFO L124 PetriNetUnfolderBase]: 4051/6796 cut-off events. [2024-06-20 17:53:35,535 INFO L125 PetriNetUnfolderBase]: For 592919/592921 co-relation queries the response was YES. [2024-06-20 17:53:35,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49685 conditions, 6796 events. 4051/6796 cut-off events. For 592919/592921 co-relation queries the response was YES. Maximal size of possible extension queue 559. Compared 47490 event pairs, 858 based on Foata normal form. 8/6803 useless extension candidates. Maximal degree in co-relation 49479. Up to 5259 conditions per place. [2024-06-20 17:53:35,648 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 530 selfloop transitions, 123 changer transitions 0/659 dead transitions. [2024-06-20 17:53:35,648 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 502 places, 659 transitions, 10575 flow [2024-06-20 17:53:35,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:53:35,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:53:35,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 227 transitions. [2024-06-20 17:53:35,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5675 [2024-06-20 17:53:35,649 INFO L175 Difference]: Start difference. First operand has 493 places, 615 transitions, 8782 flow. Second operand 10 states and 227 transitions. [2024-06-20 17:53:35,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 502 places, 659 transitions, 10575 flow [2024-06-20 17:53:38,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 497 places, 659 transitions, 10458 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-20 17:53:38,484 INFO L231 Difference]: Finished difference. Result has 498 places, 617 transitions, 8979 flow [2024-06-20 17:53:38,485 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8667, PETRI_DIFFERENCE_MINUEND_PLACES=488, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=615, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=493, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8979, PETRI_PLACES=498, PETRI_TRANSITIONS=617} [2024-06-20 17:53:38,485 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 457 predicate places. [2024-06-20 17:53:38,485 INFO L495 AbstractCegarLoop]: Abstraction has has 498 places, 617 transitions, 8979 flow [2024-06-20 17:53:38,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.545454545454545) internal successors, (160), 11 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:53:38,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:53:38,485 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:53:38,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190 [2024-06-20 17:53:38,486 INFO L420 AbstractCegarLoop]: === Iteration 192 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:53:38,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:53:38,486 INFO L85 PathProgramCache]: Analyzing trace with hash -1246833936, now seen corresponding path program 9 times [2024-06-20 17:53:38,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:53:38,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120212519] [2024-06-20 17:53:38,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:53:38,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:53:38,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:53:38,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:53:38,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:53:38,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120212519] [2024-06-20 17:53:38,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120212519] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:53:38,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:53:38,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:53:38,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028612579] [2024-06-20 17:53:38,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:53:38,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:53:38,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:53:38,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:53:38,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:53:39,003 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-20 17:53:39,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 498 places, 617 transitions, 8979 flow. Second operand has 11 states, 11 states have (on average 14.545454545454545) internal successors, (160), 11 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:53:39,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:53:39,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-20 17:53:39,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:53:40,596 INFO L124 PetriNetUnfolderBase]: 4071/6834 cut-off events. [2024-06-20 17:53:40,596 INFO L125 PetriNetUnfolderBase]: For 596472/596482 co-relation queries the response was YES. [2024-06-20 17:53:40,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50275 conditions, 6834 events. 4071/6834 cut-off events. For 596472/596482 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 47960 event pairs, 933 based on Foata normal form. 16/6849 useless extension candidates. Maximal degree in co-relation 50068. Up to 6104 conditions per place. [2024-06-20 17:53:40,736 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 579 selfloop transitions, 51 changer transitions 0/636 dead transitions. [2024-06-20 17:53:40,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 504 places, 636 transitions, 10332 flow [2024-06-20 17:53:40,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:53:40,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:53:40,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 153 transitions. [2024-06-20 17:53:40,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5464285714285714 [2024-06-20 17:53:40,738 INFO L175 Difference]: Start difference. First operand has 498 places, 617 transitions, 8979 flow. Second operand 7 states and 153 transitions. [2024-06-20 17:53:40,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 504 places, 636 transitions, 10332 flow [2024-06-20 17:53:43,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 498 places, 636 transitions, 10176 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-20 17:53:43,496 INFO L231 Difference]: Finished difference. Result has 499 places, 618 transitions, 8964 flow [2024-06-20 17:53:43,496 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8823, PETRI_DIFFERENCE_MINUEND_PLACES=492, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=617, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=566, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8964, PETRI_PLACES=499, PETRI_TRANSITIONS=618} [2024-06-20 17:53:43,497 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 458 predicate places. [2024-06-20 17:53:43,497 INFO L495 AbstractCegarLoop]: Abstraction has has 499 places, 618 transitions, 8964 flow [2024-06-20 17:53:43,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.545454545454545) internal successors, (160), 11 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:53:43,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:53:43,498 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:53:43,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191 [2024-06-20 17:53:43,498 INFO L420 AbstractCegarLoop]: === Iteration 193 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:53:43,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:53:43,498 INFO L85 PathProgramCache]: Analyzing trace with hash -988130256, now seen corresponding path program 10 times [2024-06-20 17:53:43,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:53:43,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665666869] [2024-06-20 17:53:43,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:53:43,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:53:43,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:53:43,954 INFO 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 17:53:43,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:53:43,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665666869] [2024-06-20 17:53:43,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665666869] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:53:43,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:53:43,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:53:43,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715628599] [2024-06-20 17:53:43,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:53:43,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:53:43,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:53:43,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:53:43,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:53:44,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-20 17:53:44,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 499 places, 618 transitions, 8964 flow. Second operand has 11 states, 11 states have (on average 14.545454545454545) internal successors, (160), 11 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:53:44,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:53:44,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-20 17:53:44,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:53:45,698 INFO L124 PetriNetUnfolderBase]: 4137/6932 cut-off events. [2024-06-20 17:53:45,698 INFO L125 PetriNetUnfolderBase]: For 664316/664318 co-relation queries the response was YES. [2024-06-20 17:53:45,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52186 conditions, 6932 events. 4137/6932 cut-off events. For 664316/664318 co-relation queries the response was YES. Maximal size of possible extension queue 569. Compared 48614 event pairs, 923 based on Foata normal form. 8/6939 useless extension candidates. Maximal degree in co-relation 51977. Up to 5967 conditions per place. [2024-06-20 17:53:45,812 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 545 selfloop transitions, 108 changer transitions 0/659 dead transitions. [2024-06-20 17:53:45,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 509 places, 659 transitions, 10755 flow [2024-06-20 17:53:45,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 17:53:45,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 17:53:45,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 241 transitions. [2024-06-20 17:53:45,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5477272727272727 [2024-06-20 17:53:45,813 INFO L175 Difference]: Start difference. First operand has 499 places, 618 transitions, 8964 flow. Second operand 11 states and 241 transitions. [2024-06-20 17:53:45,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 509 places, 659 transitions, 10755 flow [2024-06-20 17:53:49,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 503 places, 659 transitions, 10637 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-20 17:53:49,109 INFO L231 Difference]: Finished difference. Result has 504 places, 620 transitions, 9134 flow [2024-06-20 17:53:49,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8848, PETRI_DIFFERENCE_MINUEND_PLACES=493, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=618, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=511, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9134, PETRI_PLACES=504, PETRI_TRANSITIONS=620} [2024-06-20 17:53:49,110 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 463 predicate places. [2024-06-20 17:53:49,110 INFO L495 AbstractCegarLoop]: Abstraction has has 504 places, 620 transitions, 9134 flow [2024-06-20 17:53:49,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.545454545454545) internal successors, (160), 11 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:53:49,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:53:49,110 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:53:49,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192 [2024-06-20 17:53:49,111 INFO L420 AbstractCegarLoop]: === Iteration 194 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:53:49,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:53:49,111 INFO L85 PathProgramCache]: Analyzing trace with hash -854598066, now seen corresponding path program 11 times [2024-06-20 17:53:49,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:53:49,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043618532] [2024-06-20 17:53:49,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:53:49,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:53:49,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:53:49,498 INFO 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 17:53:49,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:53:49,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043618532] [2024-06-20 17:53:49,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043618532] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:53:49,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:53:49,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:53:49,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336675580] [2024-06-20 17:53:49,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:53:49,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:53:49,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:53:49,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:53:49,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:53:49,556 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-20 17:53:49,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 504 places, 620 transitions, 9134 flow. Second operand has 11 states, 11 states have (on average 14.545454545454545) internal successors, (160), 11 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:53:49,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:53:49,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-20 17:53:49,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:53:51,305 INFO L124 PetriNetUnfolderBase]: 4165/6978 cut-off events. [2024-06-20 17:53:51,306 INFO L125 PetriNetUnfolderBase]: For 680201/680203 co-relation queries the response was YES. [2024-06-20 17:53:51,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52742 conditions, 6978 events. 4165/6978 cut-off events. For 680201/680203 co-relation queries the response was YES. Maximal size of possible extension queue 573. Compared 49049 event pairs, 983 based on Foata normal form. 10/6987 useless extension candidates. Maximal degree in co-relation 52533. Up to 6239 conditions per place. [2024-06-20 17:53:51,414 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 547 selfloop transitions, 101 changer transitions 0/654 dead transitions. [2024-06-20 17:53:51,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 515 places, 654 transitions, 10587 flow [2024-06-20 17:53:51,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 17:53:51,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 17:53:51,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 250 transitions. [2024-06-20 17:53:51,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5208333333333334 [2024-06-20 17:53:51,416 INFO L175 Difference]: Start difference. First operand has 504 places, 620 transitions, 9134 flow. Second operand 12 states and 250 transitions. [2024-06-20 17:53:51,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 515 places, 654 transitions, 10587 flow [2024-06-20 17:53:54,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 508 places, 654 transitions, 10438 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-20 17:53:54,927 INFO L231 Difference]: Finished difference. Result has 509 places, 621 transitions, 9228 flow [2024-06-20 17:53:54,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8985, PETRI_DIFFERENCE_MINUEND_PLACES=497, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=620, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=519, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=9228, PETRI_PLACES=509, PETRI_TRANSITIONS=621} [2024-06-20 17:53:54,927 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 468 predicate places. [2024-06-20 17:53:54,927 INFO L495 AbstractCegarLoop]: Abstraction has has 509 places, 621 transitions, 9228 flow [2024-06-20 17:53:54,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.545454545454545) internal successors, (160), 11 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:53:54,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:53:54,928 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:53:54,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193 [2024-06-20 17:53:54,928 INFO L420 AbstractCegarLoop]: === Iteration 195 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:53:54,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:53:54,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1603961174, now seen corresponding path program 12 times [2024-06-20 17:53:54,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:53:54,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148958255] [2024-06-20 17:53:54,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:53:54,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:53:54,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:53:55,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:53:55,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:53:55,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148958255] [2024-06-20 17:53:55,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148958255] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:53:55,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:53:55,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:53:55,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772919397] [2024-06-20 17:53:55,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:53:55,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:53:55,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:53:55,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:53:55,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:53:55,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-20 17:53:55,423 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 509 places, 621 transitions, 9228 flow. Second operand has 11 states, 11 states have (on average 14.545454545454545) internal successors, (160), 11 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:53:55,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:53:55,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-20 17:53:55,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:53:57,330 INFO L124 PetriNetUnfolderBase]: 4147/6952 cut-off events. [2024-06-20 17:53:57,330 INFO L125 PetriNetUnfolderBase]: For 629801/629803 co-relation queries the response was YES. [2024-06-20 17:53:57,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51725 conditions, 6952 events. 4147/6952 cut-off events. For 629801/629803 co-relation queries the response was YES. Maximal size of possible extension queue 573. Compared 48793 event pairs, 959 based on Foata normal form. 10/6961 useless extension candidates. Maximal degree in co-relation 51514. Up to 6101 conditions per place. [2024-06-20 17:53:57,434 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 548 selfloop transitions, 104 changer transitions 0/658 dead transitions. [2024-06-20 17:53:57,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 520 places, 658 transitions, 10705 flow [2024-06-20 17:53:57,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 17:53:57,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 17:53:57,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 253 transitions. [2024-06-20 17:53:57,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5270833333333333 [2024-06-20 17:53:57,435 INFO L175 Difference]: Start difference. First operand has 509 places, 621 transitions, 9228 flow. Second operand 12 states and 253 transitions. [2024-06-20 17:53:57,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 520 places, 658 transitions, 10705 flow [2024-06-20 17:54:00,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 511 places, 658 transitions, 10525 flow, removed 15 selfloop flow, removed 9 redundant places. [2024-06-20 17:54:00,501 INFO L231 Difference]: Finished difference. Result has 512 places, 621 transitions, 9260 flow [2024-06-20 17:54:00,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9048, PETRI_DIFFERENCE_MINUEND_PLACES=500, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=621, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=517, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=9260, PETRI_PLACES=512, PETRI_TRANSITIONS=621} [2024-06-20 17:54:00,501 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 471 predicate places. [2024-06-20 17:54:00,501 INFO L495 AbstractCegarLoop]: Abstraction has has 512 places, 621 transitions, 9260 flow [2024-06-20 17:54:00,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.545454545454545) internal successors, (160), 11 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:54:00,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:54:00,501 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:54:00,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194 [2024-06-20 17:54:00,502 INFO L420 AbstractCegarLoop]: === Iteration 196 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:54:00,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:54:00,502 INFO L85 PathProgramCache]: Analyzing trace with hash -602214992, now seen corresponding path program 13 times [2024-06-20 17:54:00,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:54:00,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111906066] [2024-06-20 17:54:00,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:54:00,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:54:00,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:54:00,929 INFO 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 17:54:00,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:54:00,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111906066] [2024-06-20 17:54:00,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111906066] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:54:00,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:54:00,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:54:00,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327279337] [2024-06-20 17:54:00,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:54:00,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:54:00,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:54:00,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:54:00,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:54:01,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-20 17:54:01,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 512 places, 621 transitions, 9260 flow. Second operand has 11 states, 11 states have (on average 14.545454545454545) internal successors, (160), 11 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:54:01,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:54:01,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-20 17:54:01,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:54:02,593 INFO L124 PetriNetUnfolderBase]: 4134/6937 cut-off events. [2024-06-20 17:54:02,593 INFO L125 PetriNetUnfolderBase]: For 577491/577501 co-relation queries the response was YES. [2024-06-20 17:54:02,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50751 conditions, 6937 events. 4134/6937 cut-off events. For 577491/577501 co-relation queries the response was YES. Maximal size of possible extension queue 573. Compared 48742 event pairs, 879 based on Foata normal form. 16/6952 useless extension candidates. Maximal degree in co-relation 50539. Up to 6031 conditions per place. [2024-06-20 17:54:02,907 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 577 selfloop transitions, 64 changer transitions 0/647 dead transitions. [2024-06-20 17:54:02,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 518 places, 647 transitions, 10919 flow [2024-06-20 17:54:02,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:54:02,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:54:02,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-20 17:54:02,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-20 17:54:02,909 INFO L175 Difference]: Start difference. First operand has 512 places, 621 transitions, 9260 flow. Second operand 7 states and 161 transitions. [2024-06-20 17:54:02,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 518 places, 647 transitions, 10919 flow [2024-06-20 17:54:05,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 507 places, 647 transitions, 10686 flow, removed 4 selfloop flow, removed 11 redundant places. [2024-06-20 17:54:05,462 INFO L231 Difference]: Finished difference. Result has 509 places, 622 transitions, 9204 flow [2024-06-20 17:54:05,462 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9027, PETRI_DIFFERENCE_MINUEND_PLACES=501, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=621, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=557, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9204, PETRI_PLACES=509, PETRI_TRANSITIONS=622} [2024-06-20 17:54:05,463 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 468 predicate places. [2024-06-20 17:54:05,463 INFO L495 AbstractCegarLoop]: Abstraction has has 509 places, 622 transitions, 9204 flow [2024-06-20 17:54:05,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.545454545454545) internal successors, (160), 11 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:54:05,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:54:05,463 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:54:05,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195 [2024-06-20 17:54:05,463 INFO L420 AbstractCegarLoop]: === Iteration 197 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:54:05,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:54:05,464 INFO L85 PathProgramCache]: Analyzing trace with hash -858567632, now seen corresponding path program 14 times [2024-06-20 17:54:05,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:54:05,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412436639] [2024-06-20 17:54:05,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:54:05,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:54:05,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:54:05,873 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 17:54:05,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:54:05,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412436639] [2024-06-20 17:54:05,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412436639] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:54:05,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:54:05,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:54:05,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650485120] [2024-06-20 17:54:05,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:54:05,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:54:05,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:54:05,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:54:05,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:54:05,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-20 17:54:05,949 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 509 places, 622 transitions, 9204 flow. Second operand has 11 states, 11 states have (on average 14.545454545454545) internal successors, (160), 11 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:54:05,949 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:54:05,949 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-20 17:54:05,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:54:07,519 INFO L124 PetriNetUnfolderBase]: 4116/6911 cut-off events. [2024-06-20 17:54:07,520 INFO L125 PetriNetUnfolderBase]: For 541660/541670 co-relation queries the response was YES. [2024-06-20 17:54:07,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49613 conditions, 6911 events. 4116/6911 cut-off events. For 541660/541670 co-relation queries the response was YES. Maximal size of possible extension queue 573. Compared 48617 event pairs, 972 based on Foata normal form. 18/6928 useless extension candidates. Maximal degree in co-relation 49399. Up to 6174 conditions per place. [2024-06-20 17:54:07,640 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 583 selfloop transitions, 50 changer transitions 0/639 dead transitions. [2024-06-20 17:54:07,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 514 places, 639 transitions, 10552 flow [2024-06-20 17:54:07,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 17:54:07,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 17:54:07,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 136 transitions. [2024-06-20 17:54:07,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5666666666666667 [2024-06-20 17:54:07,641 INFO L175 Difference]: Start difference. First operand has 509 places, 622 transitions, 9204 flow. Second operand 6 states and 136 transitions. [2024-06-20 17:54:07,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 514 places, 639 transitions, 10552 flow [2024-06-20 17:54:10,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 507 places, 639 transitions, 10303 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-20 17:54:10,059 INFO L231 Difference]: Finished difference. Result has 508 places, 622 transitions, 9068 flow [2024-06-20 17:54:10,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8955, PETRI_DIFFERENCE_MINUEND_PLACES=502, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=622, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=572, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=9068, PETRI_PLACES=508, PETRI_TRANSITIONS=622} [2024-06-20 17:54:10,059 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 467 predicate places. [2024-06-20 17:54:10,059 INFO L495 AbstractCegarLoop]: Abstraction has has 508 places, 622 transitions, 9068 flow [2024-06-20 17:54:10,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.545454545454545) internal successors, (160), 11 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:54:10,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:54:10,060 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:54:10,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196 [2024-06-20 17:54:10,060 INFO L420 AbstractCegarLoop]: === Iteration 198 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:54:10,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:54:10,060 INFO L85 PathProgramCache]: Analyzing trace with hash -593018222, now seen corresponding path program 15 times [2024-06-20 17:54:10,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:54:10,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92462754] [2024-06-20 17:54:10,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:54:10,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:54:10,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:54:10,476 INFO 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 17:54:10,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:54:10,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92462754] [2024-06-20 17:54:10,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92462754] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:54:10,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:54:10,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:54:10,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025927179] [2024-06-20 17:54:10,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:54:10,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:54:10,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:54:10,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:54:10,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:54:10,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-20 17:54:10,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 508 places, 622 transitions, 9068 flow. Second operand has 11 states, 11 states have (on average 14.545454545454545) internal successors, (160), 11 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:54:10,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:54:10,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-20 17:54:10,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:54:12,113 INFO L124 PetriNetUnfolderBase]: 4103/6892 cut-off events. [2024-06-20 17:54:12,113 INFO L125 PetriNetUnfolderBase]: For 481791/481801 co-relation queries the response was YES. [2024-06-20 17:54:12,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48149 conditions, 6892 events. 4103/6892 cut-off events. For 481791/481801 co-relation queries the response was YES. Maximal size of possible extension queue 573. Compared 48510 event pairs, 871 based on Foata normal form. 16/6907 useless extension candidates. Maximal degree in co-relation 47936. Up to 6133 conditions per place. [2024-06-20 17:54:12,228 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 589 selfloop transitions, 52 changer transitions 0/647 dead transitions. [2024-06-20 17:54:12,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 514 places, 647 transitions, 10432 flow [2024-06-20 17:54:12,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 17:54:12,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 17:54:12,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 159 transitions. [2024-06-20 17:54:12,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5678571428571428 [2024-06-20 17:54:12,229 INFO L175 Difference]: Start difference. First operand has 508 places, 622 transitions, 9068 flow. Second operand 7 states and 159 transitions. [2024-06-20 17:54:12,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 514 places, 647 transitions, 10432 flow [2024-06-20 17:54:15,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 509 places, 647 transitions, 10316 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-20 17:54:15,090 INFO L231 Difference]: Finished difference. Result has 510 places, 622 transitions, 9060 flow [2024-06-20 17:54:15,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8952, PETRI_DIFFERENCE_MINUEND_PLACES=503, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=622, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=570, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9060, PETRI_PLACES=510, PETRI_TRANSITIONS=622} [2024-06-20 17:54:15,090 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 469 predicate places. [2024-06-20 17:54:15,090 INFO L495 AbstractCegarLoop]: Abstraction has has 510 places, 622 transitions, 9060 flow [2024-06-20 17:54:15,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.545454545454545) internal successors, (160), 11 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:54:15,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:54:15,090 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:54:15,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197 [2024-06-20 17:54:15,091 INFO L420 AbstractCegarLoop]: === Iteration 199 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:54:15,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:54:15,091 INFO L85 PathProgramCache]: Analyzing trace with hash -589324262, now seen corresponding path program 16 times [2024-06-20 17:54:15,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:54:15,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939758545] [2024-06-20 17:54:15,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:54:15,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:54:15,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:54:15,513 INFO 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 17:54:15,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:54:15,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939758545] [2024-06-20 17:54:15,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939758545] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:54:15,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:54:15,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:54:15,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383083261] [2024-06-20 17:54:15,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:54:15,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:54:15,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:54:15,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:54:15,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:54:15,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-20 17:54:15,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 510 places, 622 transitions, 9060 flow. Second operand has 11 states, 11 states have (on average 14.545454545454545) internal successors, (160), 11 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:54:15,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:54:15,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-20 17:54:15,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:54:17,306 INFO L124 PetriNetUnfolderBase]: 4131/6932 cut-off events. [2024-06-20 17:54:17,307 INFO L125 PetriNetUnfolderBase]: For 486649/486651 co-relation queries the response was YES. [2024-06-20 17:54:17,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48405 conditions, 6932 events. 4131/6932 cut-off events. For 486649/486651 co-relation queries the response was YES. Maximal size of possible extension queue 577. Compared 48834 event pairs, 947 based on Foata normal form. 10/6941 useless extension candidates. Maximal degree in co-relation 48192. Up to 6218 conditions per place. [2024-06-20 17:54:17,427 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 559 selfloop transitions, 84 changer transitions 0/649 dead transitions. [2024-06-20 17:54:17,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 517 places, 649 transitions, 10487 flow [2024-06-20 17:54:17,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:54:17,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:54:17,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 179 transitions. [2024-06-20 17:54:17,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.559375 [2024-06-20 17:54:17,428 INFO L175 Difference]: Start difference. First operand has 510 places, 622 transitions, 9060 flow. Second operand 8 states and 179 transitions. [2024-06-20 17:54:17,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 517 places, 649 transitions, 10487 flow [2024-06-20 17:54:20,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 509 places, 649 transitions, 10249 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-20 17:54:20,105 INFO L231 Difference]: Finished difference. Result has 510 places, 623 transitions, 9031 flow [2024-06-20 17:54:20,105 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8824, PETRI_DIFFERENCE_MINUEND_PLACES=502, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=622, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=538, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9031, PETRI_PLACES=510, PETRI_TRANSITIONS=623} [2024-06-20 17:54:20,105 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 469 predicate places. [2024-06-20 17:54:20,106 INFO L495 AbstractCegarLoop]: Abstraction has has 510 places, 623 transitions, 9031 flow [2024-06-20 17:54:20,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.545454545454545) internal successors, (160), 11 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:54:20,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:54:20,106 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:54:20,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198 [2024-06-20 17:54:20,106 INFO L420 AbstractCegarLoop]: === Iteration 200 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:54:20,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:54:20,106 INFO L85 PathProgramCache]: Analyzing trace with hash -2016497360, now seen corresponding path program 17 times [2024-06-20 17:54:20,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:54:20,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847460839] [2024-06-20 17:54:20,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:54:20,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:54:20,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:54:20,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:54:20,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:54:20,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847460839] [2024-06-20 17:54:20,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847460839] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:54:20,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:54:20,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:54:20,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034219103] [2024-06-20 17:54:20,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:54:20,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:54:20,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:54:20,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:54:20,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:54:20,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-20 17:54:20,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 510 places, 623 transitions, 9031 flow. Second operand has 11 states, 11 states have (on average 14.545454545454545) internal successors, (160), 11 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:54:20,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:54:20,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-20 17:54:20,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:54:22,234 INFO L124 PetriNetUnfolderBase]: 4159/6976 cut-off events. [2024-06-20 17:54:22,234 INFO L125 PetriNetUnfolderBase]: For 493773/493775 co-relation queries the response was YES. [2024-06-20 17:54:22,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48490 conditions, 6976 events. 4159/6976 cut-off events. For 493773/493775 co-relation queries the response was YES. Maximal size of possible extension queue 580. Compared 49203 event pairs, 949 based on Foata normal form. 10/6985 useless extension candidates. Maximal degree in co-relation 48278. Up to 6258 conditions per place. [2024-06-20 17:54:22,351 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 558 selfloop transitions, 90 changer transitions 0/654 dead transitions. [2024-06-20 17:54:22,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 521 places, 654 transitions, 10476 flow [2024-06-20 17:54:22,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 17:54:22,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 17:54:22,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 247 transitions. [2024-06-20 17:54:22,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5145833333333333 [2024-06-20 17:54:22,352 INFO L175 Difference]: Start difference. First operand has 510 places, 623 transitions, 9031 flow. Second operand 12 states and 247 transitions. [2024-06-20 17:54:22,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 521 places, 654 transitions, 10476 flow [2024-06-20 17:54:24,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 514 places, 654 transitions, 10288 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-20 17:54:24,820 INFO L231 Difference]: Finished difference. Result has 515 places, 624 transitions, 9066 flow [2024-06-20 17:54:24,821 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8843, PETRI_DIFFERENCE_MINUEND_PLACES=503, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=623, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=533, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=9066, PETRI_PLACES=515, PETRI_TRANSITIONS=624} [2024-06-20 17:54:24,821 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 474 predicate places. [2024-06-20 17:54:24,821 INFO L495 AbstractCegarLoop]: Abstraction has has 515 places, 624 transitions, 9066 flow [2024-06-20 17:54:24,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.545454545454545) internal successors, (160), 11 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:54:24,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:54:24,821 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:54:24,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable199 [2024-06-20 17:54:24,821 INFO L420 AbstractCegarLoop]: === Iteration 201 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:54:24,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:54:24,822 INFO L85 PathProgramCache]: Analyzing trace with hash 399209562, now seen corresponding path program 18 times [2024-06-20 17:54:24,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:54:24,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708507028] [2024-06-20 17:54:24,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:54:24,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:54:24,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:54:25,259 INFO 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 17:54:25,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:54:25,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708507028] [2024-06-20 17:54:25,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708507028] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:54:25,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:54:25,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:54:25,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424890984] [2024-06-20 17:54:25,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:54:25,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:54:25,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:54:25,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:54:25,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:54:25,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-20 17:54:25,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 515 places, 624 transitions, 9066 flow. Second operand has 11 states, 11 states have (on average 14.545454545454545) internal successors, (160), 11 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:54:25,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:54:25,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-20 17:54:25,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:54:27,016 INFO L124 PetriNetUnfolderBase]: 4187/7020 cut-off events. [2024-06-20 17:54:27,016 INFO L125 PetriNetUnfolderBase]: For 494486/494488 co-relation queries the response was YES. [2024-06-20 17:54:27,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48830 conditions, 7020 events. 4187/7020 cut-off events. For 494486/494488 co-relation queries the response was YES. Maximal size of possible extension queue 584. Compared 49526 event pairs, 965 based on Foata normal form. 10/7029 useless extension candidates. Maximal degree in co-relation 48618. Up to 6306 conditions per place. [2024-06-20 17:54:27,127 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 559 selfloop transitions, 89 changer transitions 0/654 dead transitions. [2024-06-20 17:54:27,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 525 places, 654 transitions, 10511 flow [2024-06-20 17:54:27,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 17:54:27,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 17:54:27,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 230 transitions. [2024-06-20 17:54:27,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5227272727272727 [2024-06-20 17:54:27,128 INFO L175 Difference]: Start difference. First operand has 515 places, 624 transitions, 9066 flow. Second operand 11 states and 230 transitions. [2024-06-20 17:54:27,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 525 places, 654 transitions, 10511 flow [2024-06-20 17:54:29,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 515 places, 654 transitions, 10316 flow, removed 10 selfloop flow, removed 10 redundant places. [2024-06-20 17:54:29,516 INFO L231 Difference]: Finished difference. Result has 516 places, 625 transitions, 9092 flow [2024-06-20 17:54:29,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8871, PETRI_DIFFERENCE_MINUEND_PLACES=505, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=624, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=535, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9092, PETRI_PLACES=516, PETRI_TRANSITIONS=625} [2024-06-20 17:54:29,517 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 475 predicate places. [2024-06-20 17:54:29,517 INFO L495 AbstractCegarLoop]: Abstraction has has 516 places, 625 transitions, 9092 flow [2024-06-20 17:54:29,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.545454545454545) internal successors, (160), 11 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:54:29,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:54:29,517 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:54:29,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable200 [2024-06-20 17:54:29,517 INFO L420 AbstractCegarLoop]: === Iteration 202 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:54:29,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:54:29,518 INFO L85 PathProgramCache]: Analyzing trace with hash 407780442, now seen corresponding path program 19 times [2024-06-20 17:54:29,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:54:29,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111526477] [2024-06-20 17:54:29,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:54:29,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:54:29,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:54:29,914 INFO 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 17:54:29,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:54:29,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111526477] [2024-06-20 17:54:29,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111526477] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:54:29,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:54:29,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:54:29,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351852000] [2024-06-20 17:54:29,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:54:29,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:54:29,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:54:29,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:54:29,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:54:29,972 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-20 17:54:29,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 516 places, 625 transitions, 9092 flow. Second operand has 11 states, 11 states have (on average 14.545454545454545) internal successors, (160), 11 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:54:29,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:54:29,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-20 17:54:29,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:54:31,597 INFO L124 PetriNetUnfolderBase]: 4215/7064 cut-off events. [2024-06-20 17:54:31,598 INFO L125 PetriNetUnfolderBase]: For 502111/502113 co-relation queries the response was YES. [2024-06-20 17:54:31,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49223 conditions, 7064 events. 4215/7064 cut-off events. For 502111/502113 co-relation queries the response was YES. Maximal size of possible extension queue 590. Compared 49895 event pairs, 965 based on Foata normal form. 10/7073 useless extension candidates. Maximal degree in co-relation 49010. Up to 6202 conditions per place. [2024-06-20 17:54:31,722 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 561 selfloop transitions, 92 changer transitions 0/659 dead transitions. [2024-06-20 17:54:31,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 526 places, 659 transitions, 10599 flow [2024-06-20 17:54:31,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 17:54:31,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 17:54:31,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 233 transitions. [2024-06-20 17:54:31,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5295454545454545 [2024-06-20 17:54:31,723 INFO L175 Difference]: Start difference. First operand has 516 places, 625 transitions, 9092 flow. Second operand 11 states and 233 transitions. [2024-06-20 17:54:31,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 526 places, 659 transitions, 10599 flow [2024-06-20 17:54:34,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 517 places, 659 transitions, 10402 flow, removed 11 selfloop flow, removed 9 redundant places. [2024-06-20 17:54:34,098 INFO L231 Difference]: Finished difference. Result has 518 places, 626 transitions, 9123 flow [2024-06-20 17:54:34,098 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8895, PETRI_DIFFERENCE_MINUEND_PLACES=507, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=625, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=533, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9123, PETRI_PLACES=518, PETRI_TRANSITIONS=626} [2024-06-20 17:54:34,098 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 477 predicate places. [2024-06-20 17:54:34,098 INFO L495 AbstractCegarLoop]: Abstraction has has 518 places, 626 transitions, 9123 flow [2024-06-20 17:54:34,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.545454545454545) internal successors, (160), 11 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:54:34,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:54:34,099 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:54:34,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable201 [2024-06-20 17:54:34,099 INFO L420 AbstractCegarLoop]: === Iteration 203 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:54:34,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:54:34,099 INFO L85 PathProgramCache]: Analyzing trace with hash -450499442, now seen corresponding path program 20 times [2024-06-20 17:54:34,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:54:34,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778144518] [2024-06-20 17:54:34,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:54:34,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:54:34,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:54:34,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:54:34,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:54:34,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778144518] [2024-06-20 17:54:34,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778144518] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:54:34,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:54:34,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:54:34,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195244529] [2024-06-20 17:54:34,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:54:34,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:54:34,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:54:34,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:54:34,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:54:34,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-20 17:54:34,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 518 places, 626 transitions, 9123 flow. Second operand has 11 states, 11 states have (on average 14.545454545454545) internal successors, (160), 11 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:54:34,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:54:34,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-20 17:54:34,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:54:36,272 INFO L124 PetriNetUnfolderBase]: 4230/7089 cut-off events. [2024-06-20 17:54:36,272 INFO L125 PetriNetUnfolderBase]: For 493674/493676 co-relation queries the response was YES. [2024-06-20 17:54:36,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49212 conditions, 7089 events. 4230/7089 cut-off events. For 493674/493676 co-relation queries the response was YES. Maximal size of possible extension queue 593. Compared 50110 event pairs, 980 based on Foata normal form. 10/7098 useless extension candidates. Maximal degree in co-relation 48998. Up to 6231 conditions per place. [2024-06-20 17:54:36,382 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 564 selfloop transitions, 87 changer transitions 0/657 dead transitions. [2024-06-20 17:54:36,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 525 places, 657 transitions, 10622 flow [2024-06-20 17:54:36,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:54:36,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:54:36,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-20 17:54:36,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.56875 [2024-06-20 17:54:36,383 INFO L175 Difference]: Start difference. First operand has 518 places, 626 transitions, 9123 flow. Second operand 8 states and 182 transitions. [2024-06-20 17:54:36,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 525 places, 657 transitions, 10622 flow [2024-06-20 17:54:38,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 516 places, 657 transitions, 10416 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-20 17:54:38,668 INFO L231 Difference]: Finished difference. Result has 517 places, 627 transitions, 9137 flow [2024-06-20 17:54:38,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8917, PETRI_DIFFERENCE_MINUEND_PLACES=509, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=626, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=539, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9137, PETRI_PLACES=517, PETRI_TRANSITIONS=627} [2024-06-20 17:54:38,669 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 476 predicate places. [2024-06-20 17:54:38,669 INFO L495 AbstractCegarLoop]: Abstraction has has 517 places, 627 transitions, 9137 flow [2024-06-20 17:54:38,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.545454545454545) internal successors, (160), 11 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:54:38,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:54:38,669 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:54:38,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable202 [2024-06-20 17:54:38,670 INFO L420 AbstractCegarLoop]: === Iteration 204 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:54:38,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:54:38,670 INFO L85 PathProgramCache]: Analyzing trace with hash -592602512, now seen corresponding path program 21 times [2024-06-20 17:54:38,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:54:38,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573798838] [2024-06-20 17:54:38,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:54:38,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:54:38,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:54:39,075 INFO 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 17:54:39,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:54:39,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573798838] [2024-06-20 17:54:39,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573798838] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:54:39,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:54:39,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:54:39,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416222929] [2024-06-20 17:54:39,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:54:39,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:54:39,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:54:39,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:54:39,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:54:39,160 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-20 17:54:39,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 517 places, 627 transitions, 9137 flow. Second operand has 11 states, 11 states have (on average 14.545454545454545) internal successors, (160), 11 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:54:39,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:54:39,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-20 17:54:39,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:54:40,755 INFO L124 PetriNetUnfolderBase]: 4217/7070 cut-off events. [2024-06-20 17:54:40,755 INFO L125 PetriNetUnfolderBase]: For 434637/434639 co-relation queries the response was YES. [2024-06-20 17:54:40,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48163 conditions, 7070 events. 4217/7070 cut-off events. For 434637/434639 co-relation queries the response was YES. Maximal size of possible extension queue 593. Compared 49978 event pairs, 888 based on Foata normal form. 8/7077 useless extension candidates. Maximal degree in co-relation 47948. Up to 5794 conditions per place. [2024-06-20 17:54:40,875 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 551 selfloop transitions, 105 changer transitions 0/662 dead transitions. [2024-06-20 17:54:40,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 524 places, 662 transitions, 10620 flow [2024-06-20 17:54:40,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 17:54:40,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 17:54:40,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-20 17:54:40,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.584375 [2024-06-20 17:54:40,876 INFO L175 Difference]: Start difference. First operand has 517 places, 627 transitions, 9137 flow. Second operand 8 states and 187 transitions. [2024-06-20 17:54:40,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 524 places, 662 transitions, 10620 flow [2024-06-20 17:54:43,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 518 places, 662 transitions, 10412 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-20 17:54:43,119 INFO L231 Difference]: Finished difference. Result has 519 places, 627 transitions, 9143 flow [2024-06-20 17:54:43,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8929, PETRI_DIFFERENCE_MINUEND_PLACES=511, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=627, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9143, PETRI_PLACES=519, PETRI_TRANSITIONS=627} [2024-06-20 17:54:43,120 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 478 predicate places. [2024-06-20 17:54:43,120 INFO L495 AbstractCegarLoop]: Abstraction has has 519 places, 627 transitions, 9143 flow [2024-06-20 17:54:43,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.545454545454545) internal successors, (160), 11 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:54:43,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:54:43,120 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:54:43,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203 [2024-06-20 17:54:43,120 INFO L420 AbstractCegarLoop]: === Iteration 205 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:54:43,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:54:43,121 INFO L85 PathProgramCache]: Analyzing trace with hash -2016282158, now seen corresponding path program 2 times [2024-06-20 17:54:43,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:54:43,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186291568] [2024-06-20 17:54:43,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:54:43,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:54:43,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:54:43,521 INFO 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 17:54:43,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:54:43,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186291568] [2024-06-20 17:54:43,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186291568] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:54:43,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:54:43,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:54:43,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929523064] [2024-06-20 17:54:43,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:54:43,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:54:43,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:54:43,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:54:43,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:54:43,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-20 17:54:43,581 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 519 places, 627 transitions, 9143 flow. Second operand has 11 states, 11 states have (on average 14.545454545454545) internal successors, (160), 11 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:54:43,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:54:43,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-20 17:54:43,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:54:45,285 INFO L124 PetriNetUnfolderBase]: 4237/7098 cut-off events. [2024-06-20 17:54:45,286 INFO L125 PetriNetUnfolderBase]: For 439291/439293 co-relation queries the response was YES. [2024-06-20 17:54:45,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48380 conditions, 7098 events. 4237/7098 cut-off events. For 439291/439293 co-relation queries the response was YES. Maximal size of possible extension queue 594. Compared 50131 event pairs, 991 based on Foata normal form. 8/7105 useless extension candidates. Maximal degree in co-relation 48164. Up to 6278 conditions per place. [2024-06-20 17:54:45,395 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 559 selfloop transitions, 96 changer transitions 0/661 dead transitions. [2024-06-20 17:54:45,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 530 places, 661 transitions, 10620 flow [2024-06-20 17:54:45,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 17:54:45,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 17:54:45,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 250 transitions. [2024-06-20 17:54:45,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5208333333333334 [2024-06-20 17:54:45,396 INFO L175 Difference]: Start difference. First operand has 519 places, 627 transitions, 9143 flow. Second operand 12 states and 250 transitions. [2024-06-20 17:54:45,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 530 places, 661 transitions, 10620 flow [2024-06-20 17:54:47,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 521 places, 661 transitions, 10207 flow, removed 11 selfloop flow, removed 9 redundant places. [2024-06-20 17:54:47,574 INFO L231 Difference]: Finished difference. Result has 522 places, 628 transitions, 8954 flow [2024-06-20 17:54:47,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8730, PETRI_DIFFERENCE_MINUEND_PLACES=510, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=627, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=531, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8954, PETRI_PLACES=522, PETRI_TRANSITIONS=628} [2024-06-20 17:54:47,574 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 481 predicate places. [2024-06-20 17:54:47,574 INFO L495 AbstractCegarLoop]: Abstraction has has 522 places, 628 transitions, 8954 flow [2024-06-20 17:54:47,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.545454545454545) internal successors, (160), 11 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:54:47,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:54:47,575 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:54:47,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204 [2024-06-20 17:54:47,575 INFO L420 AbstractCegarLoop]: === Iteration 206 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:54:47,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:54:47,575 INFO L85 PathProgramCache]: Analyzing trace with hash 171523428, now seen corresponding path program 4 times [2024-06-20 17:54:47,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:54:47,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812892740] [2024-06-20 17:54:47,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:54:47,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:54:47,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:54:47,989 INFO 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 17:54:47,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:54:47,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812892740] [2024-06-20 17:54:47,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812892740] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:54:47,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:54:47,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:54:47,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350154595] [2024-06-20 17:54:47,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:54:47,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:54:47,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:54:47,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:54:47,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:54:48,054 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-20 17:54:48,054 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 522 places, 628 transitions, 8954 flow. Second operand has 11 states, 11 states have (on average 14.545454545454545) internal successors, (160), 11 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:54:48,054 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:54:48,054 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-20 17:54:48,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:54:49,625 INFO L124 PetriNetUnfolderBase]: 4265/7148 cut-off events. [2024-06-20 17:54:49,626 INFO L125 PetriNetUnfolderBase]: For 442813/442815 co-relation queries the response was YES. [2024-06-20 17:54:49,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47899 conditions, 7148 events. 4265/7148 cut-off events. For 442813/442815 co-relation queries the response was YES. Maximal size of possible extension queue 597. Compared 50597 event pairs, 981 based on Foata normal form. 8/7155 useless extension candidates. Maximal degree in co-relation 47684. Up to 6383 conditions per place. [2024-06-20 17:54:49,752 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 584 selfloop transitions, 73 changer transitions 0/663 dead transitions. [2024-06-20 17:54:49,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 530 places, 663 transitions, 10525 flow [2024-06-20 17:54:49,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:54:49,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:54:49,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 197 transitions. [2024-06-20 17:54:49,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5472222222222223 [2024-06-20 17:54:49,753 INFO L175 Difference]: Start difference. First operand has 522 places, 628 transitions, 8954 flow. Second operand 9 states and 197 transitions. [2024-06-20 17:54:49,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 530 places, 663 transitions, 10525 flow [2024-06-20 17:54:52,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 520 places, 663 transitions, 10308 flow, removed 9 selfloop flow, removed 10 redundant places. [2024-06-20 17:54:52,521 INFO L231 Difference]: Finished difference. Result has 522 places, 631 transitions, 8962 flow [2024-06-20 17:54:52,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8746, PETRI_DIFFERENCE_MINUEND_PLACES=512, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=628, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=555, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8962, PETRI_PLACES=522, PETRI_TRANSITIONS=631} [2024-06-20 17:54:52,522 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 481 predicate places. [2024-06-20 17:54:52,522 INFO L495 AbstractCegarLoop]: Abstraction has has 522 places, 631 transitions, 8962 flow [2024-06-20 17:54:52,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.545454545454545) internal successors, (160), 11 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:54:52,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:54:52,522 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:54:52,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205 [2024-06-20 17:54:52,522 INFO L420 AbstractCegarLoop]: === Iteration 207 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:54:52,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:54:52,523 INFO L85 PathProgramCache]: Analyzing trace with hash 614589564, now seen corresponding path program 3 times [2024-06-20 17:54:52,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:54:52,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345370052] [2024-06-20 17:54:52,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:54:52,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:54:52,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:54:52,943 INFO 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 17:54:52,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:54:52,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345370052] [2024-06-20 17:54:52,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345370052] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:54:52,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:54:52,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:54:52,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323579444] [2024-06-20 17:54:52,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:54:52,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:54:52,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:54:52,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:54:52,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:54:53,026 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-20 17:54:53,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 522 places, 631 transitions, 8962 flow. Second operand has 11 states, 11 states have (on average 14.545454545454545) internal successors, (160), 11 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:54:53,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:54:53,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-20 17:54:53,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:54:54,727 INFO L124 PetriNetUnfolderBase]: 4285/7186 cut-off events. [2024-06-20 17:54:54,728 INFO L125 PetriNetUnfolderBase]: For 449474/449476 co-relation queries the response was YES. [2024-06-20 17:54:54,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48117 conditions, 7186 events. 4285/7186 cut-off events. For 449474/449476 co-relation queries the response was YES. Maximal size of possible extension queue 598. Compared 50884 event pairs, 921 based on Foata normal form. 8/7193 useless extension candidates. Maximal degree in co-relation 47900. Up to 5899 conditions per place. [2024-06-20 17:54:54,839 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 547 selfloop transitions, 115 changer transitions 0/668 dead transitions. [2024-06-20 17:54:54,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 532 places, 668 transitions, 10741 flow [2024-06-20 17:54:54,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 17:54:54,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 17:54:54,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 236 transitions. [2024-06-20 17:54:54,840 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5363636363636364 [2024-06-20 17:54:54,840 INFO L175 Difference]: Start difference. First operand has 522 places, 631 transitions, 8962 flow. Second operand 11 states and 236 transitions. [2024-06-20 17:54:54,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 532 places, 668 transitions, 10741 flow [2024-06-20 17:54:57,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 525 places, 668 transitions, 10577 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-20 17:54:57,624 INFO L231 Difference]: Finished difference. Result has 526 places, 632 transitions, 9062 flow [2024-06-20 17:54:57,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8800, PETRI_DIFFERENCE_MINUEND_PLACES=515, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=631, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=517, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9062, PETRI_PLACES=526, PETRI_TRANSITIONS=632} [2024-06-20 17:54:57,624 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 485 predicate places. [2024-06-20 17:54:57,624 INFO L495 AbstractCegarLoop]: Abstraction has has 526 places, 632 transitions, 9062 flow [2024-06-20 17:54:57,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.545454545454545) internal successors, (160), 11 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:54:57,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:54:57,635 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:54:57,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206 [2024-06-20 17:54:57,635 INFO L420 AbstractCegarLoop]: === Iteration 208 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:54:57,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:54:57,636 INFO L85 PathProgramCache]: Analyzing trace with hash 614352228, now seen corresponding path program 5 times [2024-06-20 17:54:57,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:54:57,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188259369] [2024-06-20 17:54:57,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:54:57,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:54:57,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:54:58,090 INFO 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 17:54:58,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:54:58,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188259369] [2024-06-20 17:54:58,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188259369] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:54:58,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:54:58,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:54:58,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469913173] [2024-06-20 17:54:58,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:54:58,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:54:58,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:54:58,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:54:58,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:54:58,160 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-20 17:54:58,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 526 places, 632 transitions, 9062 flow. Second operand has 11 states, 11 states have (on average 14.545454545454545) internal successors, (160), 11 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:54:58,161 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:54:58,161 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-20 17:54:58,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:54:59,820 INFO L124 PetriNetUnfolderBase]: 4425/7414 cut-off events. [2024-06-20 17:54:59,820 INFO L125 PetriNetUnfolderBase]: For 453798/453800 co-relation queries the response was YES. [2024-06-20 17:54:59,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49721 conditions, 7414 events. 4425/7414 cut-off events. For 453798/453800 co-relation queries the response was YES. Maximal size of possible extension queue 614. Compared 52765 event pairs, 906 based on Foata normal form. 8/7421 useless extension candidates. Maximal degree in co-relation 49504. Up to 6307 conditions per place. [2024-06-20 17:54:59,942 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 578 selfloop transitions, 90 changer transitions 0/674 dead transitions. [2024-06-20 17:54:59,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 534 places, 674 transitions, 10745 flow [2024-06-20 17:54:59,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 17:54:59,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 17:54:59,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 197 transitions. [2024-06-20 17:54:59,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5472222222222223 [2024-06-20 17:54:59,944 INFO L175 Difference]: Start difference. First operand has 526 places, 632 transitions, 9062 flow. Second operand 9 states and 197 transitions. [2024-06-20 17:54:59,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 534 places, 674 transitions, 10745 flow [2024-06-20 17:55:02,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 525 places, 674 transitions, 10428 flow, removed 11 selfloop flow, removed 9 redundant places. [2024-06-20 17:55:02,665 INFO L231 Difference]: Finished difference. Result has 528 places, 640 transitions, 9132 flow [2024-06-20 17:55:02,665 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8760, PETRI_DIFFERENCE_MINUEND_PLACES=517, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=632, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=542, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9132, PETRI_PLACES=528, PETRI_TRANSITIONS=640} [2024-06-20 17:55:02,665 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 487 predicate places. [2024-06-20 17:55:02,665 INFO L495 AbstractCegarLoop]: Abstraction has has 528 places, 640 transitions, 9132 flow [2024-06-20 17:55:02,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.545454545454545) internal successors, (160), 11 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:55:02,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:55:02,666 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:55:02,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207 [2024-06-20 17:55:02,666 INFO L420 AbstractCegarLoop]: === Iteration 209 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:55:02,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:55:02,666 INFO L85 PathProgramCache]: Analyzing trace with hash 614352414, now seen corresponding path program 4 times [2024-06-20 17:55:02,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:55:02,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675601042] [2024-06-20 17:55:02,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:55:02,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:55:02,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:55:03,067 INFO 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 17:55:03,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:55:03,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675601042] [2024-06-20 17:55:03,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675601042] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:55:03,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:55:03,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:55:03,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510712076] [2024-06-20 17:55:03,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:55:03,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:55:03,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:55:03,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:55:03,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:55:03,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-20 17:55:03,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 528 places, 640 transitions, 9132 flow. Second operand has 11 states, 11 states have (on average 14.545454545454545) internal successors, (160), 11 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:55:03,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:55:03,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-20 17:55:03,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:55:04,988 INFO L124 PetriNetUnfolderBase]: 4412/7395 cut-off events. [2024-06-20 17:55:04,989 INFO L125 PetriNetUnfolderBase]: For 408971/408973 co-relation queries the response was YES. [2024-06-20 17:55:05,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48542 conditions, 7395 events. 4412/7395 cut-off events. For 408971/408973 co-relation queries the response was YES. Maximal size of possible extension queue 614. Compared 52700 event pairs, 911 based on Foata normal form. 8/7402 useless extension candidates. Maximal degree in co-relation 48323. Up to 6097 conditions per place. [2024-06-20 17:55:05,113 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 554 selfloop transitions, 116 changer transitions 0/676 dead transitions. [2024-06-20 17:55:05,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 538 places, 676 transitions, 10661 flow [2024-06-20 17:55:05,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 17:55:05,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 17:55:05,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 237 transitions. [2024-06-20 17:55:05,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5386363636363637 [2024-06-20 17:55:05,114 INFO L175 Difference]: Start difference. First operand has 528 places, 640 transitions, 9132 flow. Second operand 11 states and 237 transitions. [2024-06-20 17:55:05,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 538 places, 676 transitions, 10661 flow [2024-06-20 17:55:07,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 532 places, 676 transitions, 10484 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-20 17:55:07,265 INFO L231 Difference]: Finished difference. Result has 533 places, 640 transitions, 9192 flow [2024-06-20 17:55:07,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8955, PETRI_DIFFERENCE_MINUEND_PLACES=522, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=640, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=524, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9192, PETRI_PLACES=533, PETRI_TRANSITIONS=640} [2024-06-20 17:55:07,266 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 492 predicate places. [2024-06-20 17:55:07,266 INFO L495 AbstractCegarLoop]: Abstraction has has 533 places, 640 transitions, 9192 flow [2024-06-20 17:55:07,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.545454545454545) internal successors, (160), 11 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:55:07,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:55:07,266 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:55:07,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208 [2024-06-20 17:55:07,267 INFO L420 AbstractCegarLoop]: === Iteration 210 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:55:07,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:55:07,267 INFO L85 PathProgramCache]: Analyzing trace with hash -464646970, now seen corresponding path program 6 times [2024-06-20 17:55:07,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:55:07,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271996404] [2024-06-20 17:55:07,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:55:07,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:55:07,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:55:07,649 INFO 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 17:55:07,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:55:07,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271996404] [2024-06-20 17:55:07,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271996404] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:55:07,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:55:07,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:55:07,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925509016] [2024-06-20 17:55:07,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:55:07,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:55:07,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:55:07,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:55:07,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:55:07,758 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:55:07,758 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 533 places, 640 transitions, 9192 flow. Second operand has 10 states, 10 states have (on average 15.6) internal successors, (156), 10 states have internal predecessors, (156), 0 states have call successors, (0), 0 states 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 17:55:07,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:55:07,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:55:07,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:55:09,414 INFO L124 PetriNetUnfolderBase]: 4440/7443 cut-off events. [2024-06-20 17:55:09,414 INFO L125 PetriNetUnfolderBase]: For 409209/409211 co-relation queries the response was YES. [2024-06-20 17:55:09,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48831 conditions, 7443 events. 4440/7443 cut-off events. For 409209/409211 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 53189 event pairs, 1034 based on Foata normal form. 8/7450 useless extension candidates. Maximal degree in co-relation 48613. Up to 6757 conditions per place. [2024-06-20 17:55:09,543 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 619 selfloop transitions, 46 changer transitions 0/672 dead transitions. [2024-06-20 17:55:09,544 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 543 places, 672 transitions, 10712 flow [2024-06-20 17:55:09,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 17:55:09,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 17:55:09,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 236 transitions. [2024-06-20 17:55:09,544 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5363636363636364 [2024-06-20 17:55:09,545 INFO L175 Difference]: Start difference. First operand has 533 places, 640 transitions, 9192 flow. Second operand 11 states and 236 transitions. [2024-06-20 17:55:09,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 543 places, 672 transitions, 10712 flow [2024-06-20 17:55:11,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 533 places, 672 transitions, 10461 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-20 17:55:11,772 INFO L231 Difference]: Finished difference. Result has 535 places, 643 transitions, 9104 flow [2024-06-20 17:55:11,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8944, PETRI_DIFFERENCE_MINUEND_PLACES=523, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=640, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=594, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9104, PETRI_PLACES=535, PETRI_TRANSITIONS=643} [2024-06-20 17:55:11,773 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 494 predicate places. [2024-06-20 17:55:11,773 INFO L495 AbstractCegarLoop]: Abstraction has has 535 places, 643 transitions, 9104 flow [2024-06-20 17:55:11,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.6) internal successors, (156), 10 states have internal predecessors, (156), 0 states have call successors, (0), 0 states 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 17:55:11,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:55:11,773 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:55:11,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209 [2024-06-20 17:55:11,774 INFO L420 AbstractCegarLoop]: === Iteration 211 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:55:11,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:55:11,774 INFO L85 PathProgramCache]: Analyzing trace with hash -198949690, now seen corresponding path program 7 times [2024-06-20 17:55:11,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:55:11,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678247446] [2024-06-20 17:55:11,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:55:11,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:55:11,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:55:12,184 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 17:55:12,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:55:12,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678247446] [2024-06-20 17:55:12,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678247446] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:55:12,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:55:12,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:55:12,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777784482] [2024-06-20 17:55:12,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:55:12,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:55:12,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:55:12,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:55:12,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:55:12,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:55:12,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 535 places, 643 transitions, 9104 flow. Second operand has 10 states, 10 states have (on average 15.6) internal successors, (156), 10 states have internal predecessors, (156), 0 states have call successors, (0), 0 states 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 17:55:12,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:55:12,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:55:12,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:55:13,880 INFO L124 PetriNetUnfolderBase]: 4460/7467 cut-off events. [2024-06-20 17:55:13,880 INFO L125 PetriNetUnfolderBase]: For 410540/410542 co-relation queries the response was YES. [2024-06-20 17:55:13,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48800 conditions, 7467 events. 4460/7467 cut-off events. For 410540/410542 co-relation queries the response was YES. Maximal size of possible extension queue 619. Compared 53264 event pairs, 1038 based on Foata normal form. 8/7474 useless extension candidates. Maximal degree in co-relation 48580. Up to 6804 conditions per place. [2024-06-20 17:55:14,004 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 616 selfloop transitions, 47 changer transitions 0/670 dead transitions. [2024-06-20 17:55:14,004 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 544 places, 670 transitions, 10555 flow [2024-06-20 17:55:14,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:55:14,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:55:14,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 216 transitions. [2024-06-20 17:55:14,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.54 [2024-06-20 17:55:14,005 INFO L175 Difference]: Start difference. First operand has 535 places, 643 transitions, 9104 flow. Second operand 10 states and 216 transitions. [2024-06-20 17:55:14,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 544 places, 670 transitions, 10555 flow [2024-06-20 17:55:16,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 536 places, 670 transitions, 10437 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-20 17:55:16,489 INFO L231 Difference]: Finished difference. Result has 537 places, 644 transitions, 9126 flow [2024-06-20 17:55:16,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8986, PETRI_DIFFERENCE_MINUEND_PLACES=527, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=643, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=596, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9126, PETRI_PLACES=537, PETRI_TRANSITIONS=644} [2024-06-20 17:55:16,489 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 496 predicate places. [2024-06-20 17:55:16,490 INFO L495 AbstractCegarLoop]: Abstraction has has 537 places, 644 transitions, 9126 flow [2024-06-20 17:55:16,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.6) internal successors, (156), 10 states have internal predecessors, (156), 0 states have call successors, (0), 0 states 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 17:55:16,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:55:16,490 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:55:16,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable210 [2024-06-20 17:55:16,490 INFO L420 AbstractCegarLoop]: === Iteration 212 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:55:16,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:55:16,490 INFO L85 PathProgramCache]: Analyzing trace with hash 379035672, now seen corresponding path program 8 times [2024-06-20 17:55:16,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:55:16,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662709884] [2024-06-20 17:55:16,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:55:16,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:55:16,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:55:16,868 INFO 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 17:55:16,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:55:16,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662709884] [2024-06-20 17:55:16,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662709884] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:55:16,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:55:16,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:55:16,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094277542] [2024-06-20 17:55:16,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:55:16,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:55:16,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:55:16,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:55:16,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:55:16,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:55:16,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 537 places, 644 transitions, 9126 flow. Second operand has 10 states, 10 states have (on average 15.6) internal successors, (156), 10 states have internal predecessors, (156), 0 states have call successors, (0), 0 states 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 17:55:16,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:55:16,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:55:16,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:55:18,766 INFO L124 PetriNetUnfolderBase]: 4480/7509 cut-off events. [2024-06-20 17:55:18,767 INFO L125 PetriNetUnfolderBase]: For 416197/416199 co-relation queries the response was YES. [2024-06-20 17:55:18,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49043 conditions, 7509 events. 4480/7509 cut-off events. For 416197/416199 co-relation queries the response was YES. Maximal size of possible extension queue 624. Compared 53713 event pairs, 1020 based on Foata normal form. 8/7516 useless extension candidates. Maximal degree in co-relation 48822. Up to 6434 conditions per place. [2024-06-20 17:55:18,887 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 539 selfloop transitions, 130 changer transitions 0/676 dead transitions. [2024-06-20 17:55:18,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 546 places, 676 transitions, 10667 flow [2024-06-20 17:55:18,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:55:18,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:55:18,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 224 transitions. [2024-06-20 17:55:18,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.56 [2024-06-20 17:55:18,888 INFO L175 Difference]: Start difference. First operand has 537 places, 644 transitions, 9126 flow. Second operand 10 states and 224 transitions. [2024-06-20 17:55:18,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 546 places, 676 transitions, 10667 flow [2024-06-20 17:55:21,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 537 places, 676 transitions, 10515 flow, removed 22 selfloop flow, removed 9 redundant places. [2024-06-20 17:55:21,400 INFO L231 Difference]: Finished difference. Result has 538 places, 645 transitions, 9282 flow [2024-06-20 17:55:21,400 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8974, PETRI_DIFFERENCE_MINUEND_PLACES=528, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=644, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=514, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9282, PETRI_PLACES=538, PETRI_TRANSITIONS=645} [2024-06-20 17:55:21,401 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 497 predicate places. [2024-06-20 17:55:21,401 INFO L495 AbstractCegarLoop]: Abstraction has has 538 places, 645 transitions, 9282 flow [2024-06-20 17:55:21,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.6) internal successors, (156), 10 states have internal predecessors, (156), 0 states have call successors, (0), 0 states 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 17:55:21,401 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:55:21,401 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:55:21,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable211 [2024-06-20 17:55:21,401 INFO L420 AbstractCegarLoop]: === Iteration 213 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:55:21,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:55:21,402 INFO L85 PathProgramCache]: Analyzing trace with hash 334896326, now seen corresponding path program 9 times [2024-06-20 17:55:21,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:55:21,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156387283] [2024-06-20 17:55:21,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:55:21,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:55:21,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:55:21,802 INFO 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 17:55:21,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:55:21,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156387283] [2024-06-20 17:55:21,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156387283] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:55:21,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:55:21,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:55:21,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422036457] [2024-06-20 17:55:21,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:55:21,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:55:21,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:55:21,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:55:21,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:55:21,884 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:55:21,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 538 places, 645 transitions, 9282 flow. Second operand has 10 states, 10 states have (on average 15.6) internal successors, (156), 10 states have internal predecessors, (156), 0 states have call successors, (0), 0 states 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 17:55:21,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:55:21,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:55:21,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:55:23,728 INFO L124 PetriNetUnfolderBase]: 4541/7610 cut-off events. [2024-06-20 17:55:23,729 INFO L125 PetriNetUnfolderBase]: For 479323/479325 co-relation queries the response was YES. [2024-06-20 17:55:23,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50844 conditions, 7610 events. 4541/7610 cut-off events. For 479323/479325 co-relation queries the response was YES. Maximal size of possible extension queue 630. Compared 54608 event pairs, 953 based on Foata normal form. 8/7617 useless extension candidates. Maximal degree in co-relation 50624. Up to 6768 conditions per place. [2024-06-20 17:55:23,860 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 606 selfloop transitions, 68 changer transitions 0/681 dead transitions. [2024-06-20 17:55:23,860 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 548 places, 681 transitions, 11117 flow [2024-06-20 17:55:23,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 17:55:23,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 17:55:23,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 237 transitions. [2024-06-20 17:55:23,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5386363636363637 [2024-06-20 17:55:23,861 INFO L175 Difference]: Start difference. First operand has 538 places, 645 transitions, 9282 flow. Second operand 11 states and 237 transitions. [2024-06-20 17:55:23,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 548 places, 681 transitions, 11117 flow [2024-06-20 17:55:26,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 539 places, 681 transitions, 10818 flow, removed 19 selfloop flow, removed 9 redundant places. [2024-06-20 17:55:26,605 INFO L231 Difference]: Finished difference. Result has 540 places, 649 transitions, 9229 flow [2024-06-20 17:55:26,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8985, PETRI_DIFFERENCE_MINUEND_PLACES=529, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=645, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=580, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9229, PETRI_PLACES=540, PETRI_TRANSITIONS=649} [2024-06-20 17:55:26,605 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 499 predicate places. [2024-06-20 17:55:26,606 INFO L495 AbstractCegarLoop]: Abstraction has has 540 places, 649 transitions, 9229 flow [2024-06-20 17:55:26,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.6) internal successors, (156), 10 states have internal predecessors, (156), 0 states have call successors, (0), 0 states 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 17:55:26,606 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:55:26,606 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:55:26,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable212 [2024-06-20 17:55:26,606 INFO L420 AbstractCegarLoop]: === Iteration 214 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:55:26,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:55:26,606 INFO L85 PathProgramCache]: Analyzing trace with hash 328467236, now seen corresponding path program 10 times [2024-06-20 17:55:26,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:55:26,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44101562] [2024-06-20 17:55:26,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:55:26,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:55:26,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:55:26,989 INFO 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 17:55:26,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:55:26,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44101562] [2024-06-20 17:55:26,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44101562] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:55:26,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:55:26,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:55:26,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220678800] [2024-06-20 17:55:26,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:55:26,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:55:26,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:55:26,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:55:26,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:55:27,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:55:27,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 540 places, 649 transitions, 9229 flow. Second operand has 10 states, 10 states have (on average 15.6) internal successors, (156), 10 states have internal predecessors, (156), 0 states have call successors, (0), 0 states 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 17:55:27,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:55:27,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:55:27,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:55:29,113 INFO L124 PetriNetUnfolderBase]: 4528/7591 cut-off events. [2024-06-20 17:55:29,113 INFO L125 PetriNetUnfolderBase]: For 423756/423758 co-relation queries the response was YES. [2024-06-20 17:55:29,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49532 conditions, 7591 events. 4528/7591 cut-off events. For 423756/423758 co-relation queries the response was YES. Maximal size of possible extension queue 630. Compared 54422 event pairs, 951 based on Foata normal form. 8/7598 useless extension candidates. Maximal degree in co-relation 49312. Up to 6834 conditions per place. [2024-06-20 17:55:29,234 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 604 selfloop transitions, 65 changer transitions 0/676 dead transitions. [2024-06-20 17:55:29,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 549 places, 676 transitions, 10654 flow [2024-06-20 17:55:29,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:55:29,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:55:29,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 217 transitions. [2024-06-20 17:55:29,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5425 [2024-06-20 17:55:29,235 INFO L175 Difference]: Start difference. First operand has 540 places, 649 transitions, 9229 flow. Second operand 10 states and 217 transitions. [2024-06-20 17:55:29,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 549 places, 676 transitions, 10654 flow [2024-06-20 17:55:31,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 543 places, 676 transitions, 10501 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-20 17:55:31,578 INFO L231 Difference]: Finished difference. Result has 544 places, 649 transitions, 9210 flow [2024-06-20 17:55:31,579 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9076, PETRI_DIFFERENCE_MINUEND_PLACES=534, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=649, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=584, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9210, PETRI_PLACES=544, PETRI_TRANSITIONS=649} [2024-06-20 17:55:31,579 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 503 predicate places. [2024-06-20 17:55:31,579 INFO L495 AbstractCegarLoop]: Abstraction has has 544 places, 649 transitions, 9210 flow [2024-06-20 17:55:31,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.6) internal successors, (156), 10 states have internal predecessors, (156), 0 states have call successors, (0), 0 states 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 17:55:31,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:55:31,579 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:55:31,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable213 [2024-06-20 17:55:31,580 INFO L420 AbstractCegarLoop]: === Iteration 215 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:55:31,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:55:31,580 INFO L85 PathProgramCache]: Analyzing trace with hash 157644836, now seen corresponding path program 11 times [2024-06-20 17:55:31,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:55:31,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018697053] [2024-06-20 17:55:31,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:55:31,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:55:31,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:55:31,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:55:31,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:55:31,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018697053] [2024-06-20 17:55:31,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018697053] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:55:31,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:55:31,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:55:31,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806294696] [2024-06-20 17:55:31,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:55:31,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:55:31,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:55:31,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:55:31,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:55:32,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:55:32,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 544 places, 649 transitions, 9210 flow. Second operand has 10 states, 10 states have (on average 15.6) internal successors, (156), 10 states have internal predecessors, (156), 0 states have call successors, (0), 0 states 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 17:55:32,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:55:32,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:55:32,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:55:33,938 INFO L124 PetriNetUnfolderBase]: 4515/7572 cut-off events. [2024-06-20 17:55:33,938 INFO L125 PetriNetUnfolderBase]: For 369457/369459 co-relation queries the response was YES. [2024-06-20 17:55:34,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48328 conditions, 7572 events. 4515/7572 cut-off events. For 369457/369459 co-relation queries the response was YES. Maximal size of possible extension queue 627. Compared 54083 event pairs, 999 based on Foata normal form. 8/7579 useless extension candidates. Maximal degree in co-relation 48107. Up to 5545 conditions per place. [2024-06-20 17:55:34,163 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 510 selfloop transitions, 164 changer transitions 0/681 dead transitions. [2024-06-20 17:55:34,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 553 places, 681 transitions, 10721 flow [2024-06-20 17:55:34,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 17:55:34,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 17:55:34,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 224 transitions. [2024-06-20 17:55:34,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.56 [2024-06-20 17:55:34,164 INFO L175 Difference]: Start difference. First operand has 544 places, 649 transitions, 9210 flow. Second operand 10 states and 224 transitions. [2024-06-20 17:55:34,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 553 places, 681 transitions, 10721 flow [2024-06-20 17:55:37,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 543 places, 681 transitions, 10565 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-20 17:55:37,022 INFO L231 Difference]: Finished difference. Result has 544 places, 649 transitions, 9386 flow [2024-06-20 17:55:37,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9054, PETRI_DIFFERENCE_MINUEND_PLACES=534, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=649, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=485, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9386, PETRI_PLACES=544, PETRI_TRANSITIONS=649} [2024-06-20 17:55:37,022 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 503 predicate places. [2024-06-20 17:55:37,022 INFO L495 AbstractCegarLoop]: Abstraction has has 544 places, 649 transitions, 9386 flow [2024-06-20 17:55:37,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.6) internal successors, (156), 10 states have internal predecessors, (156), 0 states have call successors, (0), 0 states 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 17:55:37,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:55:37,023 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:55:37,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214 [2024-06-20 17:55:37,023 INFO L420 AbstractCegarLoop]: === Iteration 216 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:55:37,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:55:37,023 INFO L85 PathProgramCache]: Analyzing trace with hash 1103276396, now seen corresponding path program 1 times [2024-06-20 17:55:37,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:55:37,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791938241] [2024-06-20 17:55:37,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:55:37,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:55:37,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:55:37,416 INFO 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 17:55:37,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:55:37,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791938241] [2024-06-20 17:55:37,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791938241] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:55:37,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:55:37,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 17:55:37,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087880362] [2024-06-20 17:55:37,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:55:37,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 17:55:37,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:55:37,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 17:55:37,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-20 17:55:37,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:55:37,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 544 places, 649 transitions, 9386 flow. Second operand has 11 states, 11 states have (on average 15.545454545454545) internal successors, (171), 11 states have internal predecessors, (171), 0 states have call successors, (0), 0 states 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 17:55:37,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:55:37,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:55:37,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:55:39,810 INFO L124 PetriNetUnfolderBase]: 4804/8094 cut-off events. [2024-06-20 17:55:39,810 INFO L125 PetriNetUnfolderBase]: For 938127/938135 co-relation queries the response was YES. [2024-06-20 17:55:39,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58284 conditions, 8094 events. 4804/8094 cut-off events. For 938127/938135 co-relation queries the response was YES. Maximal size of possible extension queue 654. Compared 58513 event pairs, 1083 based on Foata normal form. 26/8118 useless extension candidates. Maximal degree in co-relation 58062. Up to 3030 conditions per place. [2024-06-20 17:55:39,948 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 366 selfloop transitions, 316 changer transitions 16/705 dead transitions. [2024-06-20 17:55:39,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 554 places, 705 transitions, 11682 flow [2024-06-20 17:55:39,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 17:55:39,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 17:55:39,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 267 transitions. [2024-06-20 17:55:39,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6068181818181818 [2024-06-20 17:55:39,949 INFO L175 Difference]: Start difference. First operand has 544 places, 649 transitions, 9386 flow. Second operand 11 states and 267 transitions. [2024-06-20 17:55:39,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 554 places, 705 transitions, 11682 flow [2024-06-20 17:55:45,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 543 places, 705 transitions, 11101 flow, removed 19 selfloop flow, removed 11 redundant places. [2024-06-20 17:55:45,425 INFO L231 Difference]: Finished difference. Result has 544 places, 646 transitions, 9411 flow [2024-06-20 17:55:45,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8805, PETRI_DIFFERENCE_MINUEND_PLACES=533, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=649, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=316, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9411, PETRI_PLACES=544, PETRI_TRANSITIONS=646} [2024-06-20 17:55:45,426 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 503 predicate places. [2024-06-20 17:55:45,426 INFO L495 AbstractCegarLoop]: Abstraction has has 544 places, 646 transitions, 9411 flow [2024-06-20 17:55:45,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 15.545454545454545) internal successors, (171), 11 states have internal predecessors, (171), 0 states have call successors, (0), 0 states 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 17:55:45,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:55:45,426 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:55:45,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable215 [2024-06-20 17:55:45,426 INFO L420 AbstractCegarLoop]: === Iteration 217 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:55:45,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:55:45,427 INFO L85 PathProgramCache]: Analyzing trace with hash 119382632, now seen corresponding path program 2 times [2024-06-20 17:55:45,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:55:45,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294722085] [2024-06-20 17:55:45,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:55:45,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:55:45,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:55:45,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:55:45,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:55:45,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294722085] [2024-06-20 17:55:45,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294722085] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:55:45,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:55:45,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:55:45,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772761151] [2024-06-20 17:55:45,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:55:45,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:55:45,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:55:45,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:55:45,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:55:45,931 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:55:45,932 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 544 places, 646 transitions, 9411 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:55:45,932 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:55:45,932 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:55:45,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:55:48,444 INFO L124 PetriNetUnfolderBase]: 4814/8113 cut-off events. [2024-06-20 17:55:48,445 INFO L125 PetriNetUnfolderBase]: For 1111950/1111960 co-relation queries the response was YES. [2024-06-20 17:55:48,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59841 conditions, 8113 events. 4814/8113 cut-off events. For 1111950/1111960 co-relation queries the response was YES. Maximal size of possible extension queue 645. Compared 58765 event pairs, 946 based on Foata normal form. 28/8140 useless extension candidates. Maximal degree in co-relation 59621. Up to 5828 conditions per place. [2024-06-20 17:55:48,574 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 526 selfloop transitions, 154 changer transitions 8/695 dead transitions. [2024-06-20 17:55:48,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 550 places, 695 transitions, 11363 flow [2024-06-20 17:55:48,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 17:55:48,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 17:55:48,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 256 transitions. [2024-06-20 17:55:48,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5818181818181818 [2024-06-20 17:55:48,577 INFO L175 Difference]: Start difference. First operand has 544 places, 646 transitions, 9411 flow. Second operand 11 states and 256 transitions. [2024-06-20 17:55:48,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 550 places, 695 transitions, 11363 flow [2024-06-20 17:55:54,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 541 places, 695 transitions, 10737 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-20 17:55:54,600 INFO L231 Difference]: Finished difference. Result has 542 places, 644 transitions, 9084 flow [2024-06-20 17:55:54,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8789, PETRI_DIFFERENCE_MINUEND_PLACES=531, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=646, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=492, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9084, PETRI_PLACES=542, PETRI_TRANSITIONS=644} [2024-06-20 17:55:54,600 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 501 predicate places. [2024-06-20 17:55:54,601 INFO L495 AbstractCegarLoop]: Abstraction has has 542 places, 644 transitions, 9084 flow [2024-06-20 17:55:54,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:55:54,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:55:54,601 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:55:54,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216 [2024-06-20 17:55:54,601 INFO L420 AbstractCegarLoop]: === Iteration 218 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:55:54,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:55:54,601 INFO L85 PathProgramCache]: Analyzing trace with hash 119388212, now seen corresponding path program 3 times [2024-06-20 17:55:54,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:55:54,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71341874] [2024-06-20 17:55:54,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:55:54,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:55:54,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:55:55,073 INFO 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 17:55:55,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:55:55,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71341874] [2024-06-20 17:55:55,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71341874] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:55:55,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:55:55,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:55:55,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263426292] [2024-06-20 17:55:55,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:55:55,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:55:55,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:55:55,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:55:55,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:55:55,161 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:55:55,161 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 542 places, 644 transitions, 9084 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:55:55,161 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:55:55,161 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:55:55,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:55:57,457 INFO L124 PetriNetUnfolderBase]: 4582/7705 cut-off events. [2024-06-20 17:55:57,458 INFO L125 PetriNetUnfolderBase]: For 699838/699848 co-relation queries the response was YES. [2024-06-20 17:55:57,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51829 conditions, 7705 events. 4582/7705 cut-off events. For 699838/699848 co-relation queries the response was YES. Maximal size of possible extension queue 631. Compared 55371 event pairs, 845 based on Foata normal form. 28/7732 useless extension candidates. Maximal degree in co-relation 51610. Up to 5623 conditions per place. [2024-06-20 17:55:57,577 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 511 selfloop transitions, 151 changer transitions 19/688 dead transitions. [2024-06-20 17:55:57,577 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 550 places, 688 transitions, 10698 flow [2024-06-20 17:55:57,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 17:55:57,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 17:55:57,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 250 transitions. [2024-06-20 17:55:57,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5681818181818182 [2024-06-20 17:55:57,578 INFO L175 Difference]: Start difference. First operand has 542 places, 644 transitions, 9084 flow. Second operand 11 states and 250 transitions. [2024-06-20 17:55:57,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 550 places, 688 transitions, 10698 flow [2024-06-20 17:56:00,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 540 places, 688 transitions, 10387 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-20 17:56:00,702 INFO L231 Difference]: Finished difference. Result has 541 places, 640 transitions, 9030 flow [2024-06-20 17:56:00,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8773, PETRI_DIFFERENCE_MINUEND_PLACES=530, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=644, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=493, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9030, PETRI_PLACES=541, PETRI_TRANSITIONS=640} [2024-06-20 17:56:00,703 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 500 predicate places. [2024-06-20 17:56:00,703 INFO L495 AbstractCegarLoop]: Abstraction has has 541 places, 640 transitions, 9030 flow [2024-06-20 17:56:00,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:56:00,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:56:00,703 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:56:00,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable217 [2024-06-20 17:56:00,704 INFO L420 AbstractCegarLoop]: === Iteration 219 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:56:00,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:56:00,704 INFO L85 PathProgramCache]: Analyzing trace with hash 1322849686, now seen corresponding path program 4 times [2024-06-20 17:56:00,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:56:00,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451840291] [2024-06-20 17:56:00,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:56:00,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:56:00,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:56:01,123 INFO 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 17:56:01,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:56:01,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451840291] [2024-06-20 17:56:01,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451840291] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:56:01,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:56:01,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:56:01,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331744612] [2024-06-20 17:56:01,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:56:01,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:56:01,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:56:01,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:56:01,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:56:01,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:56:01,188 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 541 places, 640 transitions, 9030 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:56:01,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:56:01,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:56:01,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:56:03,436 INFO L124 PetriNetUnfolderBase]: 4703/7934 cut-off events. [2024-06-20 17:56:03,436 INFO L125 PetriNetUnfolderBase]: For 1010743/1010753 co-relation queries the response was YES. [2024-06-20 17:56:03,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57544 conditions, 7934 events. 4703/7934 cut-off events. For 1010743/1010753 co-relation queries the response was YES. Maximal size of possible extension queue 636. Compared 57205 event pairs, 961 based on Foata normal form. 28/7961 useless extension candidates. Maximal degree in co-relation 57326. Up to 5467 conditions per place. [2024-06-20 17:56:03,563 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 521 selfloop transitions, 150 changer transitions 13/691 dead transitions. [2024-06-20 17:56:03,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 546 places, 691 transitions, 10970 flow [2024-06-20 17:56:03,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-20 17:56:03,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-20 17:56:03,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 287 transitions. [2024-06-20 17:56:03,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.551923076923077 [2024-06-20 17:56:03,564 INFO L175 Difference]: Start difference. First operand has 541 places, 640 transitions, 9030 flow. Second operand 13 states and 287 transitions. [2024-06-20 17:56:03,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 546 places, 691 transitions, 10970 flow [2024-06-20 17:56:08,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 536 places, 691 transitions, 10641 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-20 17:56:08,803 INFO L231 Difference]: Finished difference. Result has 537 places, 637 transitions, 8967 flow [2024-06-20 17:56:08,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8703, PETRI_DIFFERENCE_MINUEND_PLACES=524, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=640, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=490, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=8967, PETRI_PLACES=537, PETRI_TRANSITIONS=637} [2024-06-20 17:56:08,803 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 496 predicate places. [2024-06-20 17:56:08,803 INFO L495 AbstractCegarLoop]: Abstraction has has 537 places, 637 transitions, 8967 flow [2024-06-20 17:56:08,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:56:08,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:56:08,804 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:56:08,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218 [2024-06-20 17:56:08,804 INFO L420 AbstractCegarLoop]: === Iteration 220 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:56:08,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:56:08,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1315492456, now seen corresponding path program 5 times [2024-06-20 17:56:08,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:56:08,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215128185] [2024-06-20 17:56:08,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:56:08,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:56:08,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:56:09,168 INFO 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 17:56:09,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:56:09,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215128185] [2024-06-20 17:56:09,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215128185] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:56:09,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:56:09,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:56:09,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564739424] [2024-06-20 17:56:09,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:56:09,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:56:09,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:56:09,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:56:09,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:56:09,280 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:56:09,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 537 places, 637 transitions, 8967 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:56:09,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:56:09,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:56:09,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:56:11,497 INFO L124 PetriNetUnfolderBase]: 4659/7858 cut-off events. [2024-06-20 17:56:11,497 INFO L125 PetriNetUnfolderBase]: For 1011966/1011976 co-relation queries the response was YES. [2024-06-20 17:56:11,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57019 conditions, 7858 events. 4659/7858 cut-off events. For 1011966/1011976 co-relation queries the response was YES. Maximal size of possible extension queue 628. Compared 56579 event pairs, 997 based on Foata normal form. 28/7885 useless extension candidates. Maximal degree in co-relation 56802. Up to 5467 conditions per place. [2024-06-20 17:56:11,629 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 530 selfloop transitions, 144 changer transitions 8/689 dead transitions. [2024-06-20 17:56:11,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 544 places, 689 transitions, 11195 flow [2024-06-20 17:56:11,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 17:56:11,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 17:56:11,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 274 transitions. [2024-06-20 17:56:11,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5708333333333333 [2024-06-20 17:56:11,630 INFO L175 Difference]: Start difference. First operand has 537 places, 637 transitions, 8967 flow. Second operand 12 states and 274 transitions. [2024-06-20 17:56:11,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 544 places, 689 transitions, 11195 flow [2024-06-20 17:56:17,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 534 places, 689 transitions, 10895 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-20 17:56:17,393 INFO L231 Difference]: Finished difference. Result has 535 places, 635 transitions, 8945 flow [2024-06-20 17:56:17,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8671, PETRI_DIFFERENCE_MINUEND_PLACES=523, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=637, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=493, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8945, PETRI_PLACES=535, PETRI_TRANSITIONS=635} [2024-06-20 17:56:17,393 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 494 predicate places. [2024-06-20 17:56:17,393 INFO L495 AbstractCegarLoop]: Abstraction has has 535 places, 635 transitions, 8945 flow [2024-06-20 17:56:17,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:56:17,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:56:17,394 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:56:17,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219 [2024-06-20 17:56:17,394 INFO L420 AbstractCegarLoop]: === Iteration 221 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:56:17,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:56:17,394 INFO L85 PathProgramCache]: Analyzing trace with hash 1315498036, now seen corresponding path program 6 times [2024-06-20 17:56:17,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:56:17,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709134435] [2024-06-20 17:56:17,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:56:17,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:56:17,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:56:17,755 INFO 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 17:56:17,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:56:17,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709134435] [2024-06-20 17:56:17,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709134435] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:56:17,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:56:17,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:56:17,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307245059] [2024-06-20 17:56:17,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:56:17,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:56:17,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:56:17,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:56:17,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:56:17,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:56:17,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 535 places, 635 transitions, 8945 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:56:17,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:56:17,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:56:17,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:56:19,961 INFO L124 PetriNetUnfolderBase]: 4554/7675 cut-off events. [2024-06-20 17:56:19,961 INFO L125 PetriNetUnfolderBase]: For 848645/848655 co-relation queries the response was YES. [2024-06-20 17:56:20,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53799 conditions, 7675 events. 4554/7675 cut-off events. For 848645/848655 co-relation queries the response was YES. Maximal size of possible extension queue 620. Compared 55041 event pairs, 949 based on Foata normal form. 28/7702 useless extension candidates. Maximal degree in co-relation 53582. Up to 5467 conditions per place. [2024-06-20 17:56:20,081 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 515 selfloop transitions, 140 changer transitions 20/682 dead transitions. [2024-06-20 17:56:20,081 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 544 places, 682 transitions, 10839 flow [2024-06-20 17:56:20,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 17:56:20,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 17:56:20,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 268 transitions. [2024-06-20 17:56:20,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5583333333333333 [2024-06-20 17:56:20,082 INFO L175 Difference]: Start difference. First operand has 535 places, 635 transitions, 8945 flow. Second operand 12 states and 268 transitions. [2024-06-20 17:56:20,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 544 places, 682 transitions, 10839 flow [2024-06-20 17:56:24,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 534 places, 682 transitions, 10548 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-20 17:56:24,287 INFO L231 Difference]: Finished difference. Result has 535 places, 630 transitions, 8860 flow [2024-06-20 17:56:24,288 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8658, PETRI_DIFFERENCE_MINUEND_PLACES=523, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=635, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=495, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8860, PETRI_PLACES=535, PETRI_TRANSITIONS=630} [2024-06-20 17:56:24,288 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 494 predicate places. [2024-06-20 17:56:24,288 INFO L495 AbstractCegarLoop]: Abstraction has has 535 places, 630 transitions, 8860 flow [2024-06-20 17:56:24,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:56:24,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:56:24,288 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:56:24,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220 [2024-06-20 17:56:24,289 INFO L420 AbstractCegarLoop]: === Iteration 222 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:56:24,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:56:24,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1579122498, now seen corresponding path program 7 times [2024-06-20 17:56:24,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:56:24,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21579748] [2024-06-20 17:56:24,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:56:24,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:56:24,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:56:24,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 17:56:24,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:56:24,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21579748] [2024-06-20 17:56:24,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21579748] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:56:24,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:56:24,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:56:24,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329673374] [2024-06-20 17:56:24,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:56:24,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:56:24,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:56:24,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:56:24,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:56:24,759 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:56:24,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 535 places, 630 transitions, 8860 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:56:24,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:56:24,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:56:24,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:56:26,860 INFO L124 PetriNetUnfolderBase]: 4655/7833 cut-off events. [2024-06-20 17:56:26,860 INFO L125 PetriNetUnfolderBase]: For 1119519/1119527 co-relation queries the response was YES. [2024-06-20 17:56:26,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58093 conditions, 7833 events. 4655/7833 cut-off events. For 1119519/1119527 co-relation queries the response was YES. Maximal size of possible extension queue 624. Compared 56570 event pairs, 1264 based on Foata normal form. 32/7863 useless extension candidates. Maximal degree in co-relation 57877. Up to 6047 conditions per place. [2024-06-20 17:56:27,005 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 345 selfloop transitions, 305 changer transitions 19/676 dead transitions. [2024-06-20 17:56:27,005 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 540 places, 676 transitions, 10738 flow [2024-06-20 17:56:27,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-20 17:56:27,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-20 17:56:27,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 292 transitions. [2024-06-20 17:56:27,006 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5615384615384615 [2024-06-20 17:56:27,006 INFO L175 Difference]: Start difference. First operand has 535 places, 630 transitions, 8860 flow. Second operand 13 states and 292 transitions. [2024-06-20 17:56:27,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 540 places, 676 transitions, 10738 flow [2024-06-20 17:56:32,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 528 places, 676 transitions, 10323 flow, removed 5 selfloop flow, removed 12 redundant places. [2024-06-20 17:56:32,315 INFO L231 Difference]: Finished difference. Result has 529 places, 626 transitions, 9010 flow [2024-06-20 17:56:32,315 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8447, PETRI_DIFFERENCE_MINUEND_PLACES=516, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=630, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=305, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=9010, PETRI_PLACES=529, PETRI_TRANSITIONS=626} [2024-06-20 17:56:32,316 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 488 predicate places. [2024-06-20 17:56:32,316 INFO L495 AbstractCegarLoop]: Abstraction has has 529 places, 626 transitions, 9010 flow [2024-06-20 17:56:32,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:56:32,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:56:32,316 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:56:32,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable221 [2024-06-20 17:56:32,316 INFO L420 AbstractCegarLoop]: === Iteration 223 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:56:32,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:56:32,317 INFO L85 PathProgramCache]: Analyzing trace with hash 69436448, now seen corresponding path program 8 times [2024-06-20 17:56:32,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:56:32,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475214516] [2024-06-20 17:56:32,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:56:32,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:56:32,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:56:32,654 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 17:56:32,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:56:32,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475214516] [2024-06-20 17:56:32,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475214516] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:56:32,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:56:32,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:56:32,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188580884] [2024-06-20 17:56:32,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:56:32,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:56:32,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:56:32,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:56:32,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:56:32,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:56:32,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 529 places, 626 transitions, 9010 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:56:32,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:56:32,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:56:32,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:56:34,776 INFO L124 PetriNetUnfolderBase]: 4567/7688 cut-off events. [2024-06-20 17:56:34,777 INFO L125 PetriNetUnfolderBase]: For 1130187/1130195 co-relation queries the response was YES. [2024-06-20 17:56:34,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57140 conditions, 7688 events. 4567/7688 cut-off events. For 1130187/1130195 co-relation queries the response was YES. Maximal size of possible extension queue 619. Compared 55407 event pairs, 1302 based on Foata normal form. 34/7720 useless extension candidates. Maximal degree in co-relation 56926. Up to 6498 conditions per place. [2024-06-20 17:56:34,895 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 337 selfloop transitions, 302 changer transitions 12/658 dead transitions. [2024-06-20 17:56:34,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 537 places, 658 transitions, 10450 flow [2024-06-20 17:56:34,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-20 17:56:34,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-20 17:56:34,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 281 transitions. [2024-06-20 17:56:34,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5403846153846154 [2024-06-20 17:56:34,897 INFO L175 Difference]: Start difference. First operand has 529 places, 626 transitions, 9010 flow. Second operand 13 states and 281 transitions. [2024-06-20 17:56:34,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 537 places, 658 transitions, 10450 flow [2024-06-20 17:56:39,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 526 places, 658 transitions, 9874 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-20 17:56:39,435 INFO L231 Difference]: Finished difference. Result has 527 places, 622 transitions, 9015 flow [2024-06-20 17:56:39,435 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8434, PETRI_DIFFERENCE_MINUEND_PLACES=514, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=626, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=302, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=9015, PETRI_PLACES=527, PETRI_TRANSITIONS=622} [2024-06-20 17:56:39,435 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 486 predicate places. [2024-06-20 17:56:39,436 INFO L495 AbstractCegarLoop]: Abstraction has has 527 places, 622 transitions, 9015 flow [2024-06-20 17:56:39,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:56:39,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:56:39,436 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:56:39,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable222 [2024-06-20 17:56:39,436 INFO L420 AbstractCegarLoop]: === Iteration 224 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:56:39,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:56:39,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1468299978, now seen corresponding path program 9 times [2024-06-20 17:56:39,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:56:39,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992755116] [2024-06-20 17:56:39,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:56:39,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:56:39,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:56:39,809 INFO 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 17:56:39,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:56:39,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992755116] [2024-06-20 17:56:39,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992755116] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:56:39,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:56:39,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:56:39,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482499070] [2024-06-20 17:56:39,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:56:39,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:56:39,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:56:39,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:56:39,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:56:39,894 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:56:39,894 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 527 places, 622 transitions, 9015 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:56:39,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:56:39,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:56:39,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:56:42,005 INFO L124 PetriNetUnfolderBase]: 4727/7980 cut-off events. [2024-06-20 17:56:42,005 INFO L125 PetriNetUnfolderBase]: For 1405598/1405606 co-relation queries the response was YES. [2024-06-20 17:56:42,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63949 conditions, 7980 events. 4727/7980 cut-off events. For 1405598/1405606 co-relation queries the response was YES. Maximal size of possible extension queue 623. Compared 57802 event pairs, 1239 based on Foata normal form. 26/8004 useless extension candidates. Maximal degree in co-relation 63736. Up to 5314 conditions per place. [2024-06-20 17:56:42,132 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 344 selfloop transitions, 305 changer transitions 16/672 dead transitions. [2024-06-20 17:56:42,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 535 places, 672 transitions, 11175 flow [2024-06-20 17:56:42,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 17:56:42,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 17:56:42,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 280 transitions. [2024-06-20 17:56:42,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-20 17:56:42,133 INFO L175 Difference]: Start difference. First operand has 527 places, 622 transitions, 9015 flow. Second operand 12 states and 280 transitions. [2024-06-20 17:56:42,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 535 places, 672 transitions, 11175 flow [2024-06-20 17:56:48,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 523 places, 672 transitions, 10559 flow, removed 6 selfloop flow, removed 12 redundant places. [2024-06-20 17:56:48,864 INFO L231 Difference]: Finished difference. Result has 524 places, 619 transitions, 8992 flow [2024-06-20 17:56:48,865 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8407, PETRI_DIFFERENCE_MINUEND_PLACES=512, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=622, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=305, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8992, PETRI_PLACES=524, PETRI_TRANSITIONS=619} [2024-06-20 17:56:48,865 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 483 predicate places. [2024-06-20 17:56:48,865 INFO L495 AbstractCegarLoop]: Abstraction has has 524 places, 619 transitions, 8992 flow [2024-06-20 17:56:48,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:56:48,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:56:48,865 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:56:48,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable223 [2024-06-20 17:56:48,866 INFO L420 AbstractCegarLoop]: === Iteration 225 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:56:48,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:56:48,866 INFO L85 PathProgramCache]: Analyzing trace with hash 1844225132, now seen corresponding path program 10 times [2024-06-20 17:56:48,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:56:48,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212908545] [2024-06-20 17:56:48,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:56:48,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:56:48,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:56:49,250 INFO 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 17:56:49,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:56:49,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212908545] [2024-06-20 17:56:49,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212908545] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:56:49,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:56:49,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:56:49,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117085996] [2024-06-20 17:56:49,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:56:49,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:56:49,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:56:49,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:56:49,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:56:49,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:56:49,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 524 places, 619 transitions, 8992 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:56:49,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:56:49,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:56:49,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:56:51,441 INFO L124 PetriNetUnfolderBase]: 4676/7892 cut-off events. [2024-06-20 17:56:51,442 INFO L125 PetriNetUnfolderBase]: For 1437529/1437537 co-relation queries the response was YES. [2024-06-20 17:56:51,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63690 conditions, 7892 events. 4676/7892 cut-off events. For 1437529/1437537 co-relation queries the response was YES. Maximal size of possible extension queue 616. Compared 57272 event pairs, 1386 based on Foata normal form. 32/7922 useless extension candidates. Maximal degree in co-relation 63478. Up to 6658 conditions per place. [2024-06-20 17:56:51,571 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 329 selfloop transitions, 298 changer transitions 21/655 dead transitions. [2024-06-20 17:56:51,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 532 places, 655 transitions, 10476 flow [2024-06-20 17:56:51,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-20 17:56:51,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-20 17:56:51,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 282 transitions. [2024-06-20 17:56:51,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5423076923076923 [2024-06-20 17:56:51,572 INFO L175 Difference]: Start difference. First operand has 524 places, 619 transitions, 8992 flow. Second operand 13 states and 282 transitions. [2024-06-20 17:56:51,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 532 places, 655 transitions, 10476 flow [2024-06-20 17:56:57,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 522 places, 655 transitions, 9876 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-20 17:56:57,846 INFO L231 Difference]: Finished difference. Result has 523 places, 614 transitions, 8938 flow [2024-06-20 17:56:57,846 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8392, PETRI_DIFFERENCE_MINUEND_PLACES=510, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=619, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=298, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=8938, PETRI_PLACES=523, PETRI_TRANSITIONS=614} [2024-06-20 17:56:57,847 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 482 predicate places. [2024-06-20 17:56:57,847 INFO L495 AbstractCegarLoop]: Abstraction has has 523 places, 614 transitions, 8938 flow [2024-06-20 17:56:57,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:56:57,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:56:57,847 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:56:57,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable224 [2024-06-20 17:56:57,847 INFO L420 AbstractCegarLoop]: === Iteration 226 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:56:57,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:56:57,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1472024628, now seen corresponding path program 11 times [2024-06-20 17:56:57,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:56:57,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121656505] [2024-06-20 17:56:57,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:56:57,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:56:57,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:56:58,221 INFO 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 17:56:58,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:56:58,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121656505] [2024-06-20 17:56:58,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121656505] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:56:58,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:56:58,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:56:58,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514066089] [2024-06-20 17:56:58,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:56:58,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:56:58,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:56:58,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:56:58,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:56:58,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:56:58,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 523 places, 614 transitions, 8938 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:56:58,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:56:58,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:56:58,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:57:00,562 INFO L124 PetriNetUnfolderBase]: 4619/7777 cut-off events. [2024-06-20 17:57:00,563 INFO L125 PetriNetUnfolderBase]: For 1366454/1366464 co-relation queries the response was YES. [2024-06-20 17:57:00,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62952 conditions, 7777 events. 4619/7777 cut-off events. For 1366454/1366464 co-relation queries the response was YES. Maximal size of possible extension queue 607. Compared 55934 event pairs, 1236 based on Foata normal form. 28/7804 useless extension candidates. Maximal degree in co-relation 62741. Up to 6434 conditions per place. [2024-06-20 17:57:00,697 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 523 selfloop transitions, 121 changer transitions 12/663 dead transitions. [2024-06-20 17:57:00,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 530 places, 663 transitions, 10788 flow [2024-06-20 17:57:00,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-20 17:57:00,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-20 17:57:00,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 302 transitions. [2024-06-20 17:57:00,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5392857142857143 [2024-06-20 17:57:00,699 INFO L175 Difference]: Start difference. First operand has 523 places, 614 transitions, 8938 flow. Second operand 14 states and 302 transitions. [2024-06-20 17:57:00,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 530 places, 663 transitions, 10788 flow [2024-06-20 17:57:06,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 518 places, 663 transitions, 10176 flow, removed 8 selfloop flow, removed 12 redundant places. [2024-06-20 17:57:06,654 INFO L231 Difference]: Finished difference. Result has 519 places, 612 transitions, 8552 flow [2024-06-20 17:57:06,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8332, PETRI_DIFFERENCE_MINUEND_PLACES=505, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=614, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=493, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=8552, PETRI_PLACES=519, PETRI_TRANSITIONS=612} [2024-06-20 17:57:06,654 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 478 predicate places. [2024-06-20 17:57:06,655 INFO L495 AbstractCegarLoop]: Abstraction has has 519 places, 612 transitions, 8552 flow [2024-06-20 17:57:06,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:57:06,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:57:06,655 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:57:06,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable225 [2024-06-20 17:57:06,655 INFO L420 AbstractCegarLoop]: === Iteration 227 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:57:06,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:57:06,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1472019048, now seen corresponding path program 12 times [2024-06-20 17:57:06,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:57:06,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817249139] [2024-06-20 17:57:06,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:57:06,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:57:06,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:57:07,028 INFO 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 17:57:07,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:57:07,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817249139] [2024-06-20 17:57:07,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817249139] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:57:07,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:57:07,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:57:07,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451889481] [2024-06-20 17:57:07,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:57:07,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:57:07,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:57:07,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:57:07,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:57:07,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:57:07,112 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 519 places, 612 transitions, 8552 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:57:07,112 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:57:07,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:57:07,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:57:09,101 INFO L124 PetriNetUnfolderBase]: 4514/7590 cut-off events. [2024-06-20 17:57:09,101 INFO L125 PetriNetUnfolderBase]: For 1180715/1180725 co-relation queries the response was YES. [2024-06-20 17:57:09,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59202 conditions, 7590 events. 4514/7590 cut-off events. For 1180715/1180725 co-relation queries the response was YES. Maximal size of possible extension queue 599. Compared 54423 event pairs, 1224 based on Foata normal form. 28/7617 useless extension candidates. Maximal degree in co-relation 58993. Up to 6434 conditions per place. [2024-06-20 17:57:09,219 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 507 selfloop transitions, 117 changer transitions 19/650 dead transitions. [2024-06-20 17:57:09,220 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 527 places, 650 transitions, 10030 flow [2024-06-20 17:57:09,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 17:57:09,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 17:57:09,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 261 transitions. [2024-06-20 17:57:09,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.54375 [2024-06-20 17:57:09,221 INFO L175 Difference]: Start difference. First operand has 519 places, 612 transitions, 8552 flow. Second operand 12 states and 261 transitions. [2024-06-20 17:57:09,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 527 places, 650 transitions, 10030 flow [2024-06-20 17:57:14,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 515 places, 650 transitions, 9758 flow, removed 1 selfloop flow, removed 12 redundant places. [2024-06-20 17:57:14,145 INFO L231 Difference]: Finished difference. Result has 516 places, 608 transitions, 8473 flow [2024-06-20 17:57:14,145 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=8280, PETRI_DIFFERENCE_MINUEND_PLACES=504, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=612, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=495, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8473, PETRI_PLACES=516, PETRI_TRANSITIONS=608} [2024-06-20 17:57:14,145 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 475 predicate places. [2024-06-20 17:57:14,146 INFO L495 AbstractCegarLoop]: Abstraction has has 516 places, 608 transitions, 8473 flow [2024-06-20 17:57:14,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:57:14,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 17:57:14,146 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 17:57:14,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226 [2024-06-20 17:57:14,146 INFO L420 AbstractCegarLoop]: === Iteration 228 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 17:57:14,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 17:57:14,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1118705716, now seen corresponding path program 13 times [2024-06-20 17:57:14,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 17:57:14,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036286443] [2024-06-20 17:57:14,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 17:57:14,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 17:57:14,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 17:57:14,578 INFO 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 17:57:14,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 17:57:14,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036286443] [2024-06-20 17:57:14,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036286443] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 17:57:14,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 17:57:14,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 17:57:14,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095351698] [2024-06-20 17:57:14,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 17:57:14,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 17:57:14,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 17:57:14,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 17:57:14,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 17:57:14,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-20 17:57:14,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 516 places, 608 transitions, 8473 flow. Second operand has 10 states, 10 states have (on average 15.7) internal successors, (157), 10 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 17:57:14,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 17:57:14,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-20 17:57:14,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 17:57:16,876 INFO L124 PetriNetUnfolderBase]: 4914/8280 cut-off events. [2024-06-20 17:57:16,877 INFO L125 PetriNetUnfolderBase]: For 1931233/1931243 co-relation queries the response was YES. [2024-06-20 17:57:16,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74507 conditions, 8280 events. 4914/8280 cut-off events. For 1931233/1931243 co-relation queries the response was YES. Maximal size of possible extension queue 628. Compared 60530 event pairs, 1457 based on Foata normal form. 28/8307 useless extension candidates. Maximal degree in co-relation 74298. Up to 6521 conditions per place. [2024-06-20 17:57:17,014 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 520 selfloop transitions, 116 changer transitions 8/651 dead transitions. [2024-06-20 17:57:17,014 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 522 places, 651 transitions, 10537 flow [2024-06-20 17:57:17,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-20 17:57:17,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-20 17:57:17,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 302 transitions. [2024-06-20 17:57:17,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5392857142857143 [2024-06-20 17:57:17,015 INFO L175 Difference]: Start difference. First operand has 516 places, 608 transitions, 8473 flow. Second operand 14 states and 302 transitions. [2024-06-20 17:57:17,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 522 places, 651 transitions, 10537 flow