./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe001_tso.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/safe001_tso.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cde23df1 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe001_tso.i ./goblint.2024-05-21_14-57-05.files/mutex-meet/safe001_tso.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-cde23df-m [2024-06-14 13:51:36,828 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-14 13:51:36,900 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-14 13:51:36,903 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-14 13:51:36,904 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-14 13:51:36,933 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-14 13:51:36,934 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-14 13:51:36,934 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-14 13:51:36,935 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-14 13:51:36,938 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-14 13:51:36,938 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-14 13:51:36,938 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-14 13:51:36,939 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-14 13:51:36,940 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-14 13:51:36,940 INFO L153 SettingsManager]: * Use SBE=true [2024-06-14 13:51:36,941 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-14 13:51:36,941 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-14 13:51:36,941 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-14 13:51:36,941 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-14 13:51:36,942 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-14 13:51:36,942 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-14 13:51:36,942 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-14 13:51:36,942 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-14 13:51:36,943 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-14 13:51:36,943 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-14 13:51:36,943 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-14 13:51:36,943 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-14 13:51:36,943 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-14 13:51:36,944 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-14 13:51:36,944 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-14 13:51:36,945 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-14 13:51:36,945 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-14 13:51:36,945 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 13:51:36,945 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-14 13:51:36,946 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-14 13:51:36,946 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-14 13:51:36,946 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-14 13:51:36,946 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-14 13:51:36,946 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-14 13:51:36,947 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-14 13:51:36,947 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-14 13:51:36,947 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-14 13:51:36,947 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-14 13:51:36,947 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-14 13:51:37,159 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-14 13:51:37,174 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-14 13:51:37,176 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-14 13:51:37,177 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-14 13:51:37,177 INFO L274 PluginConnector]: CDTParser initialized [2024-06-14 13:51:37,178 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe001_tso.i [2024-06-14 13:51:38,278 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-14 13:51:38,483 INFO L384 CDTParser]: Found 1 translation units. [2024-06-14 13:51:38,486 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe001_tso.i [2024-06-14 13:51:38,498 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9176eaea3/429b7f1095ca4da696ceae2dbed3565b/FLAG4a27747df [2024-06-14 13:51:38,510 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9176eaea3/429b7f1095ca4da696ceae2dbed3565b [2024-06-14 13:51:38,512 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-14 13:51:38,513 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-14 13:51:38,513 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/mutex-meet/safe001_tso.yml/witness.yml [2024-06-14 13:51:38,613 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-14 13:51:38,615 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-14 13:51:38,616 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-14 13:51:38,616 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-14 13:51:38,620 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-14 13:51:38,620 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 01:51:38" (1/2) ... [2024-06-14 13:51:38,621 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a3d1181 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:51:38, skipping insertion in model container [2024-06-14 13:51:38,621 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 01:51:38" (1/2) ... [2024-06-14 13:51:38,623 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@319ec2f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:51:38, skipping insertion in model container [2024-06-14 13:51:38,623 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 01:51:38" (2/2) ... [2024-06-14 13:51:38,623 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a3d1181 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:51:38, skipping insertion in model container [2024-06-14 13:51:38,624 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 01:51:38" (2/2) ... [2024-06-14 13:51:38,624 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-14 13:51:38,668 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-14 13:51:38,669 INFO L97 edCorrectnessWitness]: Location invariant before [L779-L779] ((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || (0 <= __unbuffered_p2_EAX && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || (0 <= __unbuffered_p0_EAX && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || (((((((((((((((long long )__unbuffered_cnt + (long long )__unbuffered_p0_EAX >= 0LL && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )x + (long long )y >= 0LL))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p2_EAX) && 0 <= x) && 0 <= y) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((x == 0 || x == 1) || x == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) [2024-06-14 13:51:38,669 INFO L97 edCorrectnessWitness]: Location invariant before [L782-L782] ((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || (0 <= __unbuffered_p2_EAX && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || (0 <= __unbuffered_p0_EAX && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || (((((((((((((((long long )__unbuffered_cnt + (long long )__unbuffered_p0_EAX >= 0LL && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )x + (long long )y >= 0LL))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p2_EAX) && 0 <= x) && 0 <= y) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((x == 0 || x == 1) || x == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) [2024-06-14 13:51:38,670 INFO L97 edCorrectnessWitness]: Location invariant before [L781-L781] ((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || (0 <= __unbuffered_p2_EAX && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || (0 <= __unbuffered_p0_EAX && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || (((((((((((((((long long )__unbuffered_cnt + (long long )__unbuffered_p0_EAX >= 0LL && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )x + (long long )y >= 0LL))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p2_EAX) && 0 <= x) && 0 <= y) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((x == 0 || x == 1) || x == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) [2024-06-14 13:51:38,670 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-14 13:51:38,670 INFO L106 edCorrectnessWitness]: ghost_update [L777-L777] multithreaded = 1; [2024-06-14 13:51:38,706 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-14 13:51:38,991 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 13:51:38,999 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-14 13:51:39,129 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 13:51:39,166 INFO L206 MainTranslator]: Completed translation [2024-06-14 13:51:39,167 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:51:39 WrapperNode [2024-06-14 13:51:39,167 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-14 13:51:39,169 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-14 13:51:39,169 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-14 13:51:39,169 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-14 13:51:39,174 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:51:39" (1/1) ... [2024-06-14 13:51:39,201 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:51:39" (1/1) ... [2024-06-14 13:51:39,237 INFO L138 Inliner]: procedures = 175, calls = 42, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 65 [2024-06-14 13:51:39,237 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-14 13:51:39,238 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-14 13:51:39,238 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-14 13:51:39,239 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-14 13:51:39,247 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:51:39" (1/1) ... [2024-06-14 13:51:39,248 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:51:39" (1/1) ... [2024-06-14 13:51:39,252 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:51:39" (1/1) ... [2024-06-14 13:51:39,272 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-14 13:51:39,273 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:51:39" (1/1) ... [2024-06-14 13:51:39,274 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:51:39" (1/1) ... [2024-06-14 13:51:39,290 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:51:39" (1/1) ... [2024-06-14 13:51:39,292 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:51:39" (1/1) ... [2024-06-14 13:51:39,295 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:51:39" (1/1) ... [2024-06-14 13:51:39,297 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:51:39" (1/1) ... [2024-06-14 13:51:39,300 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-14 13:51:39,303 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-14 13:51:39,304 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-14 13:51:39,304 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-14 13:51:39,305 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:51:39" (1/1) ... [2024-06-14 13:51:39,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 13:51:39,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 13:51:39,331 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-14 13:51:39,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-14 13:51:39,361 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-14 13:51:39,361 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-14 13:51:39,362 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-14 13:51:39,362 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-14 13:51:39,362 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-14 13:51:39,362 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-14 13:51:39,362 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-14 13:51:39,363 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-14 13:51:39,363 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-14 13:51:39,363 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-14 13:51:39,363 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-14 13:51:39,363 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-14 13:51:39,364 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-14 13:51:39,518 INFO L244 CfgBuilder]: Building ICFG [2024-06-14 13:51:39,519 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-14 13:51:39,710 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-14 13:51:39,711 INFO L293 CfgBuilder]: Performing block encoding [2024-06-14 13:51:39,851 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-14 13:51:39,859 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-14 13:51:39,859 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 01:51:39 BoogieIcfgContainer [2024-06-14 13:51:39,859 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-14 13:51:39,861 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-14 13:51:39,861 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-14 13:51:39,864 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-14 13:51:39,864 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.06 01:51:38" (1/4) ... [2024-06-14 13:51:39,865 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3483707a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 01:51:39, skipping insertion in model container [2024-06-14 13:51:39,865 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 01:51:38" (2/4) ... [2024-06-14 13:51:39,866 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3483707a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 01:51:39, skipping insertion in model container [2024-06-14 13:51:39,866 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:51:39" (3/4) ... [2024-06-14 13:51:39,866 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3483707a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 01:51:39, skipping insertion in model container [2024-06-14 13:51:39,866 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 01:51:39" (4/4) ... [2024-06-14 13:51:39,867 INFO L112 eAbstractionObserver]: Analyzing ICFG safe001_tso.i [2024-06-14 13:51:39,881 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-14 13:51:39,882 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-14 13:51:39,882 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-14 13:51:39,935 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-14 13:51:39,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 41 transitions, 94 flow [2024-06-14 13:51:40,003 INFO L124 PetriNetUnfolderBase]: 0/38 cut-off events. [2024-06-14 13:51:40,003 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 13:51:40,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 38 events. 0/38 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. 0/35 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-14 13:51:40,005 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 41 transitions, 94 flow [2024-06-14 13:51:40,008 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 32 transitions, 73 flow [2024-06-14 13:51:40,015 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-14 13:51:40,020 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;@18b4bd12, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-14 13:51:40,021 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-14 13:51:40,024 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-14 13:51:40,024 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-14 13:51:40,024 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 13:51:40,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:51:40,025 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-14 13:51:40,025 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:51:40,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:51:40,031 INFO L85 PathProgramCache]: Analyzing trace with hash -1793314465, now seen corresponding path program 1 times [2024-06-14 13:51:40,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:51:40,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980067280] [2024-06-14 13:51:40,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:51:40,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:51:40,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:51:40,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:51:40,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:51:40,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980067280] [2024-06-14 13:51:40,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980067280] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:51:40,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:51:40,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-14 13:51:40,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810365469] [2024-06-14 13:51:40,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:51:40,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-14 13:51:40,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:51:40,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-14 13:51:40,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-14 13:51:40,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-14 13:51:40,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:40,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:51:40,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-14 13:51:40,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:51:40,833 INFO L124 PetriNetUnfolderBase]: 603/1009 cut-off events. [2024-06-14 13:51:40,834 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2024-06-14 13:51:40,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2003 conditions, 1009 events. 603/1009 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 5026 event pairs, 376 based on Foata normal form. 1/960 useless extension candidates. Maximal degree in co-relation 1988. Up to 929 conditions per place. [2024-06-14 13:51:40,842 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 30 selfloop transitions, 4 changer transitions 0/42 dead transitions. [2024-06-14 13:51:40,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 42 transitions, 167 flow [2024-06-14 13:51:40,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-14 13:51:40,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-14 13:51:40,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 82 transitions. [2024-06-14 13:51:40,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-14 13:51:40,851 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 73 flow. Second operand 3 states and 82 transitions. [2024-06-14 13:51:40,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 42 transitions, 167 flow [2024-06-14 13:51:40,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 42 transitions, 162 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-14 13:51:40,855 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 100 flow [2024-06-14 13:51:40,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2024-06-14 13:51:40,858 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 0 predicate places. [2024-06-14 13:51:40,858 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 100 flow [2024-06-14 13:51:40,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:40,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:51:40,859 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:51:40,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-14 13:51:40,859 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:51:40,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:51:40,860 INFO L85 PathProgramCache]: Analyzing trace with hash 468063438, now seen corresponding path program 1 times [2024-06-14 13:51:40,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:51:40,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493380837] [2024-06-14 13:51:40,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:51:40,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:51:40,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:51:41,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:51:41,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:51:41,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493380837] [2024-06-14 13:51:41,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493380837] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:51:41,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:51:41,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 13:51:41,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316490754] [2024-06-14 13:51:41,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:51:41,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 13:51:41,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:51:41,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 13:51:41,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 13:51:41,155 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-14 13:51:41,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 100 flow. Second operand has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:41,156 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:51:41,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-14 13:51:41,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:51:41,316 INFO L124 PetriNetUnfolderBase]: 778/1332 cut-off events. [2024-06-14 13:51:41,317 INFO L125 PetriNetUnfolderBase]: For 251/266 co-relation queries the response was YES. [2024-06-14 13:51:41,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2973 conditions, 1332 events. 778/1332 cut-off events. For 251/266 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 6771 event pairs, 280 based on Foata normal form. 9/1331 useless extension candidates. Maximal degree in co-relation 2958. Up to 1108 conditions per place. [2024-06-14 13:51:41,326 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 42 selfloop transitions, 11 changer transitions 0/60 dead transitions. [2024-06-14 13:51:41,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 60 transitions, 276 flow [2024-06-14 13:51:41,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 13:51:41,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 13:51:41,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 110 transitions. [2024-06-14 13:51:41,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6707317073170732 [2024-06-14 13:51:41,328 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 100 flow. Second operand 4 states and 110 transitions. [2024-06-14 13:51:41,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 60 transitions, 276 flow [2024-06-14 13:51:41,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 60 transitions, 272 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 13:51:41,330 INFO L231 Difference]: Finished difference. Result has 46 places, 43 transitions, 172 flow [2024-06-14 13:51:41,330 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=172, PETRI_PLACES=46, PETRI_TRANSITIONS=43} [2024-06-14 13:51:41,330 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 4 predicate places. [2024-06-14 13:51:41,331 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 43 transitions, 172 flow [2024-06-14 13:51:41,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:41,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:51:41,331 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:51:41,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-14 13:51:41,332 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)] === [2024-06-14 13:51:41,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:51:41,332 INFO L85 PathProgramCache]: Analyzing trace with hash -110344597, now seen corresponding path program 1 times [2024-06-14 13:51:41,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:51:41,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088905321] [2024-06-14 13:51:41,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:51:41,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:51:41,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:51:41,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:51:41,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:51:41,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088905321] [2024-06-14 13:51:41,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088905321] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:51:41,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:51:41,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:51:41,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449255680] [2024-06-14 13:51:41,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:51:41,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:51:41,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:51:41,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:51:41,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:51:41,617 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-14 13:51:41,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 43 transitions, 172 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:41,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:51:41,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-14 13:51:41,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:51:41,803 INFO L124 PetriNetUnfolderBase]: 790/1350 cut-off events. [2024-06-14 13:51:41,804 INFO L125 PetriNetUnfolderBase]: For 942/1003 co-relation queries the response was YES. [2024-06-14 13:51:41,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3602 conditions, 1350 events. 790/1350 cut-off events. For 942/1003 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 6893 event pairs, 180 based on Foata normal form. 28/1368 useless extension candidates. Maximal degree in co-relation 3584. Up to 1076 conditions per place. [2024-06-14 13:51:41,814 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 46 selfloop transitions, 14 changer transitions 0/67 dead transitions. [2024-06-14 13:51:41,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 67 transitions, 364 flow [2024-06-14 13:51:41,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:51:41,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:51:41,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 131 transitions. [2024-06-14 13:51:41,819 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6390243902439025 [2024-06-14 13:51:41,819 INFO L175 Difference]: Start difference. First operand has 46 places, 43 transitions, 172 flow. Second operand 5 states and 131 transitions. [2024-06-14 13:51:41,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 67 transitions, 364 flow [2024-06-14 13:51:41,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 67 transitions, 360 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-14 13:51:41,823 INFO L231 Difference]: Finished difference. Result has 50 places, 45 transitions, 220 flow [2024-06-14 13:51:41,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=220, PETRI_PLACES=50, PETRI_TRANSITIONS=45} [2024-06-14 13:51:41,824 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 8 predicate places. [2024-06-14 13:51:41,825 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 45 transitions, 220 flow [2024-06-14 13:51:41,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:41,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:51:41,825 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:51:41,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-14 13:51:41,826 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)] === [2024-06-14 13:51:41,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:51:41,827 INFO L85 PathProgramCache]: Analyzing trace with hash -1976063819, now seen corresponding path program 1 times [2024-06-14 13:51:41,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:51:41,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889298445] [2024-06-14 13:51:41,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:51:41,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:51:41,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:51:42,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:51:42,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:51:42,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889298445] [2024-06-14 13:51:42,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889298445] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:51:42,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:51:42,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 13:51:42,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057129793] [2024-06-14 13:51:42,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:51:42,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 13:51:42,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:51:42,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 13:51:42,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-14 13:51:42,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-14 13:51:42,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 45 transitions, 220 flow. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:42,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:51:42,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-14 13:51:42,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:51:42,225 INFO L124 PetriNetUnfolderBase]: 606/1013 cut-off events. [2024-06-14 13:51:42,225 INFO L125 PetriNetUnfolderBase]: For 1339/1360 co-relation queries the response was YES. [2024-06-14 13:51:42,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3129 conditions, 1013 events. 606/1013 cut-off events. For 1339/1360 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 5038 event pairs, 248 based on Foata normal form. 19/1024 useless extension candidates. Maximal degree in co-relation 3108. Up to 892 conditions per place. [2024-06-14 13:51:42,232 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 37 selfloop transitions, 11 changer transitions 0/56 dead transitions. [2024-06-14 13:51:42,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 56 transitions, 344 flow [2024-06-14 13:51:42,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 13:51:42,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 13:51:42,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 105 transitions. [2024-06-14 13:51:42,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6402439024390244 [2024-06-14 13:51:42,234 INFO L175 Difference]: Start difference. First operand has 50 places, 45 transitions, 220 flow. Second operand 4 states and 105 transitions. [2024-06-14 13:51:42,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 56 transitions, 344 flow [2024-06-14 13:51:42,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 56 transitions, 310 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-14 13:51:42,240 INFO L231 Difference]: Finished difference. Result has 51 places, 45 transitions, 218 flow [2024-06-14 13:51:42,240 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=218, PETRI_PLACES=51, PETRI_TRANSITIONS=45} [2024-06-14 13:51:42,241 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 9 predicate places. [2024-06-14 13:51:42,241 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 45 transitions, 218 flow [2024-06-14 13:51:42,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:42,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:51:42,242 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:51:42,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-14 13:51:42,242 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:51:42,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:51:42,242 INFO L85 PathProgramCache]: Analyzing trace with hash -1129415895, now seen corresponding path program 1 times [2024-06-14 13:51:42,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:51:42,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481813115] [2024-06-14 13:51:42,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:51:42,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:51:42,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:51:42,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:51:42,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:51:42,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481813115] [2024-06-14 13:51:42,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481813115] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:51:42,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:51:42,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 13:51:42,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891615007] [2024-06-14 13:51:42,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:51:42,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 13:51:42,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:51:42,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 13:51:42,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 13:51:42,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:51:42,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 45 transitions, 218 flow. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:42,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:51:42,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:51:42,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:51:42,763 INFO L124 PetriNetUnfolderBase]: 923/1525 cut-off events. [2024-06-14 13:51:42,764 INFO L125 PetriNetUnfolderBase]: For 2070/2070 co-relation queries the response was YES. [2024-06-14 13:51:42,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4564 conditions, 1525 events. 923/1525 cut-off events. For 2070/2070 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 7632 event pairs, 346 based on Foata normal form. 2/1526 useless extension candidates. Maximal degree in co-relation 4542. Up to 1383 conditions per place. [2024-06-14 13:51:42,774 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 53 selfloop transitions, 10 changer transitions 0/69 dead transitions. [2024-06-14 13:51:42,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 69 transitions, 411 flow [2024-06-14 13:51:42,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:51:42,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:51:42,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 116 transitions. [2024-06-14 13:51:42,775 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5658536585365853 [2024-06-14 13:51:42,775 INFO L175 Difference]: Start difference. First operand has 51 places, 45 transitions, 218 flow. Second operand 5 states and 116 transitions. [2024-06-14 13:51:42,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 69 transitions, 411 flow [2024-06-14 13:51:42,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 69 transitions, 380 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-14 13:51:42,780 INFO L231 Difference]: Finished difference. Result has 55 places, 54 transitions, 262 flow [2024-06-14 13:51:42,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=262, PETRI_PLACES=55, PETRI_TRANSITIONS=54} [2024-06-14 13:51:42,780 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 13 predicate places. [2024-06-14 13:51:42,780 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 54 transitions, 262 flow [2024-06-14 13:51:42,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:42,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:51:42,796 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:51:42,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-14 13:51:42,797 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:51:42,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:51:42,797 INFO L85 PathProgramCache]: Analyzing trace with hash 1251394888, now seen corresponding path program 1 times [2024-06-14 13:51:42,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:51:42,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784566553] [2024-06-14 13:51:42,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:51:42,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:51:42,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:51:43,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:51:43,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:51:43,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784566553] [2024-06-14 13:51:43,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784566553] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:51:43,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:51:43,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:51:43,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439002519] [2024-06-14 13:51:43,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:51:43,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:51:43,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:51:43,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:51:43,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:51:43,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:51:43,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 54 transitions, 262 flow. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:43,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:51:43,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:51:43,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:51:43,243 INFO L124 PetriNetUnfolderBase]: 1077/1763 cut-off events. [2024-06-14 13:51:43,243 INFO L125 PetriNetUnfolderBase]: For 2983/2987 co-relation queries the response was YES. [2024-06-14 13:51:43,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5644 conditions, 1763 events. 1077/1763 cut-off events. For 2983/2987 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 9144 event pairs, 291 based on Foata normal form. 11/1771 useless extension candidates. Maximal degree in co-relation 5620. Up to 1372 conditions per place. [2024-06-14 13:51:43,255 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 62 selfloop transitions, 35 changer transitions 0/103 dead transitions. [2024-06-14 13:51:43,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 103 transitions, 662 flow [2024-06-14 13:51:43,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:51:43,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:51:43,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-14 13:51:43,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6132404181184669 [2024-06-14 13:51:43,256 INFO L175 Difference]: Start difference. First operand has 55 places, 54 transitions, 262 flow. Second operand 7 states and 176 transitions. [2024-06-14 13:51:43,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 103 transitions, 662 flow [2024-06-14 13:51:43,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 103 transitions, 662 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-06-14 13:51:43,262 INFO L231 Difference]: Finished difference. Result has 64 places, 73 transitions, 479 flow [2024-06-14 13:51:43,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=479, PETRI_PLACES=64, PETRI_TRANSITIONS=73} [2024-06-14 13:51:43,264 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 22 predicate places. [2024-06-14 13:51:43,264 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 73 transitions, 479 flow [2024-06-14 13:51:43,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:43,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:51:43,265 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:51:43,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-14 13:51:43,265 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:51:43,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:51:43,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1314994586, now seen corresponding path program 2 times [2024-06-14 13:51:43,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:51:43,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479405038] [2024-06-14 13:51:43,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:51:43,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:51:43,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:51:43,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:51:43,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:51:43,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479405038] [2024-06-14 13:51:43,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479405038] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:51:43,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:51:43,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:51:43,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212519242] [2024-06-14 13:51:43,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:51:43,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:51:43,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:51:43,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:51:43,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:51:43,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:51:43,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 73 transitions, 479 flow. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:43,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:51:43,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:51:43,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:51:43,650 INFO L124 PetriNetUnfolderBase]: 1072/1765 cut-off events. [2024-06-14 13:51:43,650 INFO L125 PetriNetUnfolderBase]: For 5468/5472 co-relation queries the response was YES. [2024-06-14 13:51:43,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7120 conditions, 1765 events. 1072/1765 cut-off events. For 5468/5472 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 8982 event pairs, 331 based on Foata normal form. 3/1764 useless extension candidates. Maximal degree in co-relation 7091. Up to 1476 conditions per place. [2024-06-14 13:51:43,663 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 80 selfloop transitions, 28 changer transitions 0/114 dead transitions. [2024-06-14 13:51:43,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 114 transitions, 932 flow [2024-06-14 13:51:43,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:51:43,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:51:43,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-14 13:51:43,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5934959349593496 [2024-06-14 13:51:43,665 INFO L175 Difference]: Start difference. First operand has 64 places, 73 transitions, 479 flow. Second operand 6 states and 146 transitions. [2024-06-14 13:51:43,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 114 transitions, 932 flow [2024-06-14 13:51:43,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 114 transitions, 875 flow, removed 15 selfloop flow, removed 2 redundant places. [2024-06-14 13:51:43,677 INFO L231 Difference]: Finished difference. Result has 71 places, 91 transitions, 696 flow [2024-06-14 13:51:43,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=438, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=696, PETRI_PLACES=71, PETRI_TRANSITIONS=91} [2024-06-14 13:51:43,678 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 29 predicate places. [2024-06-14 13:51:43,678 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 91 transitions, 696 flow [2024-06-14 13:51:43,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:43,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:51:43,678 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:51:43,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-14 13:51:43,679 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:51:43,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:51:43,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1258070056, now seen corresponding path program 1 times [2024-06-14 13:51:43,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:51:43,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129922688] [2024-06-14 13:51:43,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:51:43,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:51:43,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:51:43,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:51:43,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:51:43,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129922688] [2024-06-14 13:51:43,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129922688] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:51:43,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:51:43,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:51:43,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187779467] [2024-06-14 13:51:43,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:51:43,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:51:43,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:51:43,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:51:43,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:51:43,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:51:43,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 91 transitions, 696 flow. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:43,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:51:43,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:51:43,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:51:44,087 INFO L124 PetriNetUnfolderBase]: 1064/1759 cut-off events. [2024-06-14 13:51:44,087 INFO L125 PetriNetUnfolderBase]: For 7024/7024 co-relation queries the response was YES. [2024-06-14 13:51:44,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7704 conditions, 1759 events. 1064/1759 cut-off events. For 7024/7024 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 9007 event pairs, 291 based on Foata normal form. 4/1762 useless extension candidates. Maximal degree in co-relation 7670. Up to 1562 conditions per place. [2024-06-14 13:51:44,101 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 95 selfloop transitions, 12 changer transitions 0/113 dead transitions. [2024-06-14 13:51:44,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 113 transitions, 980 flow [2024-06-14 13:51:44,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:51:44,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:51:44,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 136 transitions. [2024-06-14 13:51:44,104 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5528455284552846 [2024-06-14 13:51:44,104 INFO L175 Difference]: Start difference. First operand has 71 places, 91 transitions, 696 flow. Second operand 6 states and 136 transitions. [2024-06-14 13:51:44,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 113 transitions, 980 flow [2024-06-14 13:51:44,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 113 transitions, 954 flow, removed 13 selfloop flow, removed 0 redundant places. [2024-06-14 13:51:44,140 INFO L231 Difference]: Finished difference. Result has 77 places, 93 transitions, 725 flow [2024-06-14 13:51:44,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=670, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=725, PETRI_PLACES=77, PETRI_TRANSITIONS=93} [2024-06-14 13:51:44,141 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 35 predicate places. [2024-06-14 13:51:44,141 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 93 transitions, 725 flow [2024-06-14 13:51:44,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:44,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:51:44,141 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:51:44,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-14 13:51:44,142 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:51:44,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:51:44,142 INFO L85 PathProgramCache]: Analyzing trace with hash -204667698, now seen corresponding path program 1 times [2024-06-14 13:51:44,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:51:44,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706288222] [2024-06-14 13:51:44,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:51:44,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:51:44,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:51:44,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:51:44,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:51:44,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706288222] [2024-06-14 13:51:44,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706288222] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:51:44,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:51:44,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:51:44,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17231739] [2024-06-14 13:51:44,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:51:44,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:51:44,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:51:44,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:51:44,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:51:44,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:51:44,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 93 transitions, 725 flow. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:44,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:51:44,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:51:44,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:51:44,562 INFO L124 PetriNetUnfolderBase]: 1095/1800 cut-off events. [2024-06-14 13:51:44,562 INFO L125 PetriNetUnfolderBase]: For 8667/8673 co-relation queries the response was YES. [2024-06-14 13:51:44,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8183 conditions, 1800 events. 1095/1800 cut-off events. For 8667/8673 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 9286 event pairs, 323 based on Foata normal form. 7/1805 useless extension candidates. Maximal degree in co-relation 8146. Up to 1387 conditions per place. [2024-06-14 13:51:44,579 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 72 selfloop transitions, 49 changer transitions 0/127 dead transitions. [2024-06-14 13:51:44,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 127 transitions, 1198 flow [2024-06-14 13:51:44,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:51:44,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:51:44,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-14 13:51:44,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-14 13:51:44,581 INFO L175 Difference]: Start difference. First operand has 77 places, 93 transitions, 725 flow. Second operand 6 states and 150 transitions. [2024-06-14 13:51:44,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 127 transitions, 1198 flow [2024-06-14 13:51:44,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 127 transitions, 1161 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-14 13:51:44,597 INFO L231 Difference]: Finished difference. Result has 80 places, 105 transitions, 921 flow [2024-06-14 13:51:44,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=688, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=921, PETRI_PLACES=80, PETRI_TRANSITIONS=105} [2024-06-14 13:51:44,598 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 38 predicate places. [2024-06-14 13:51:44,598 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 105 transitions, 921 flow [2024-06-14 13:51:44,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:44,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:51:44,599 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:51:44,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-14 13:51:44,599 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:51:44,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:51:44,599 INFO L85 PathProgramCache]: Analyzing trace with hash 60955086, now seen corresponding path program 2 times [2024-06-14 13:51:44,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:51:44,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957605293] [2024-06-14 13:51:44,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:51:44,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:51:44,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:51:44,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:51:44,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:51:44,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957605293] [2024-06-14 13:51:44,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957605293] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:51:44,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:51:44,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:51:44,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638734447] [2024-06-14 13:51:44,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:51:44,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:51:44,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:51:44,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:51:44,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:51:44,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:51:44,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 105 transitions, 921 flow. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:44,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:51:44,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:51:44,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:51:45,024 INFO L124 PetriNetUnfolderBase]: 1086/1794 cut-off events. [2024-06-14 13:51:45,024 INFO L125 PetriNetUnfolderBase]: For 10323/10329 co-relation queries the response was YES. [2024-06-14 13:51:45,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8625 conditions, 1794 events. 1086/1794 cut-off events. For 10323/10329 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 9320 event pairs, 309 based on Foata normal form. 10/1803 useless extension candidates. Maximal degree in co-relation 8586. Up to 1380 conditions per place. [2024-06-14 13:51:45,039 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 78 selfloop transitions, 55 changer transitions 0/139 dead transitions. [2024-06-14 13:51:45,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 139 transitions, 1359 flow [2024-06-14 13:51:45,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:51:45,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:51:45,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-14 13:51:45,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6236933797909407 [2024-06-14 13:51:45,041 INFO L175 Difference]: Start difference. First operand has 80 places, 105 transitions, 921 flow. Second operand 7 states and 179 transitions. [2024-06-14 13:51:45,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 139 transitions, 1359 flow [2024-06-14 13:51:45,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 139 transitions, 1313 flow, removed 17 selfloop flow, removed 1 redundant places. [2024-06-14 13:51:45,064 INFO L231 Difference]: Finished difference. Result has 88 places, 108 transitions, 1077 flow [2024-06-14 13:51:45,065 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=875, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1077, PETRI_PLACES=88, PETRI_TRANSITIONS=108} [2024-06-14 13:51:45,065 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 46 predicate places. [2024-06-14 13:51:45,065 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 108 transitions, 1077 flow [2024-06-14 13:51:45,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:45,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:51:45,066 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:51:45,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-14 13:51:45,066 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:51:45,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:51:45,066 INFO L85 PathProgramCache]: Analyzing trace with hash -517847364, now seen corresponding path program 3 times [2024-06-14 13:51:45,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:51:45,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39978349] [2024-06-14 13:51:45,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:51:45,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:51:45,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:51:45,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:51:45,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:51:45,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39978349] [2024-06-14 13:51:45,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39978349] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:51:45,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:51:45,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:51:45,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285003526] [2024-06-14 13:51:45,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:51:45,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:51:45,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:51:45,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:51:45,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:51:45,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:51:45,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 108 transitions, 1077 flow. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:45,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:51:45,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:51:45,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:51:45,438 INFO L124 PetriNetUnfolderBase]: 1081/1797 cut-off events. [2024-06-14 13:51:45,439 INFO L125 PetriNetUnfolderBase]: For 12391/12397 co-relation queries the response was YES. [2024-06-14 13:51:45,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9229 conditions, 1797 events. 1081/1797 cut-off events. For 12391/12397 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 9336 event pairs, 330 based on Foata normal form. 5/1800 useless extension candidates. Maximal degree in co-relation 9186. Up to 1489 conditions per place. [2024-06-14 13:51:45,454 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 96 selfloop transitions, 28 changer transitions 0/130 dead transitions. [2024-06-14 13:51:45,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 130 transitions, 1404 flow [2024-06-14 13:51:45,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:51:45,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:51:45,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-14 13:51:45,456 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.573170731707317 [2024-06-14 13:51:45,456 INFO L175 Difference]: Start difference. First operand has 88 places, 108 transitions, 1077 flow. Second operand 6 states and 141 transitions. [2024-06-14 13:51:45,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 130 transitions, 1404 flow [2024-06-14 13:51:45,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 130 transitions, 1300 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-14 13:51:45,481 INFO L231 Difference]: Finished difference. Result has 91 places, 110 transitions, 1073 flow [2024-06-14 13:51:45,481 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=979, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1073, PETRI_PLACES=91, PETRI_TRANSITIONS=110} [2024-06-14 13:51:45,482 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 49 predicate places. [2024-06-14 13:51:45,482 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 110 transitions, 1073 flow [2024-06-14 13:51:45,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:45,482 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:51:45,482 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:51:45,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-14 13:51:45,483 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:51:45,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:51:45,483 INFO L85 PathProgramCache]: Analyzing trace with hash -1079765045, now seen corresponding path program 1 times [2024-06-14 13:51:45,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:51:45,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142598830] [2024-06-14 13:51:45,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:51:45,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:51:45,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:51:45,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:51:45,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:51:45,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142598830] [2024-06-14 13:51:45,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142598830] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:51:45,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:51:45,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 13:51:45,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934874714] [2024-06-14 13:51:45,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:51:45,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 13:51:45,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:51:45,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 13:51:45,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-14 13:51:45,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:51:45,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 110 transitions, 1073 flow. Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:45,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:51:45,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:51:45,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:51:45,882 INFO L124 PetriNetUnfolderBase]: 1075/1772 cut-off events. [2024-06-14 13:51:45,883 INFO L125 PetriNetUnfolderBase]: For 12633/12637 co-relation queries the response was YES. [2024-06-14 13:51:45,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9162 conditions, 1772 events. 1075/1772 cut-off events. For 12633/12637 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 9116 event pairs, 306 based on Foata normal form. 6/1777 useless extension candidates. Maximal degree in co-relation 9117. Up to 1586 conditions per place. [2024-06-14 13:51:45,899 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 104 selfloop transitions, 10 changer transitions 0/120 dead transitions. [2024-06-14 13:51:45,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 120 transitions, 1345 flow [2024-06-14 13:51:45,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 13:51:45,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 13:51:45,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 95 transitions. [2024-06-14 13:51:45,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5792682926829268 [2024-06-14 13:51:45,900 INFO L175 Difference]: Start difference. First operand has 91 places, 110 transitions, 1073 flow. Second operand 4 states and 95 transitions. [2024-06-14 13:51:45,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 120 transitions, 1345 flow [2024-06-14 13:51:45,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 120 transitions, 1303 flow, removed 7 selfloop flow, removed 2 redundant places. [2024-06-14 13:51:45,928 INFO L231 Difference]: Finished difference. Result has 93 places, 110 transitions, 1061 flow [2024-06-14 13:51:45,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1034, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1061, PETRI_PLACES=93, PETRI_TRANSITIONS=110} [2024-06-14 13:51:45,930 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 51 predicate places. [2024-06-14 13:51:45,930 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 110 transitions, 1061 flow [2024-06-14 13:51:45,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:45,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:51:45,931 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:51:45,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-14 13:51:45,931 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:51:45,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:51:45,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1743591957, now seen corresponding path program 1 times [2024-06-14 13:51:45,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:51:45,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169996113] [2024-06-14 13:51:45,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:51:45,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:51:45,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:51:46,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:51:46,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:51:46,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169996113] [2024-06-14 13:51:46,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169996113] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:51:46,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:51:46,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:51:46,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063591854] [2024-06-14 13:51:46,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:51:46,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:51:46,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:51:46,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:51:46,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:51:46,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-14 13:51:46,173 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 110 transitions, 1061 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:46,173 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:51:46,173 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-14 13:51:46,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:51:46,372 INFO L124 PetriNetUnfolderBase]: 1054/1750 cut-off events. [2024-06-14 13:51:46,373 INFO L125 PetriNetUnfolderBase]: For 15883/15913 co-relation queries the response was YES. [2024-06-14 13:51:46,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9241 conditions, 1750 events. 1054/1750 cut-off events. For 15883/15913 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 9166 event pairs, 197 based on Foata normal form. 15/1704 useless extension candidates. Maximal degree in co-relation 9194. Up to 1351 conditions per place. [2024-06-14 13:51:46,387 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 96 selfloop transitions, 20 changer transitions 0/134 dead transitions. [2024-06-14 13:51:46,387 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 134 transitions, 1441 flow [2024-06-14 13:51:46,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:51:46,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:51:46,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 126 transitions. [2024-06-14 13:51:46,388 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6146341463414634 [2024-06-14 13:51:46,389 INFO L175 Difference]: Start difference. First operand has 93 places, 110 transitions, 1061 flow. Second operand 5 states and 126 transitions. [2024-06-14 13:51:46,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 134 transitions, 1441 flow [2024-06-14 13:51:46,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 134 transitions, 1341 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-14 13:51:46,418 INFO L231 Difference]: Finished difference. Result has 93 places, 114 transitions, 1056 flow [2024-06-14 13:51:46,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=961, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1056, PETRI_PLACES=93, PETRI_TRANSITIONS=114} [2024-06-14 13:51:46,419 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 51 predicate places. [2024-06-14 13:51:46,419 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 114 transitions, 1056 flow [2024-06-14 13:51:46,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:46,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:51:46,420 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:51:46,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-14 13:51:46,420 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)] === [2024-06-14 13:51:46,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:51:46,421 INFO L85 PathProgramCache]: Analyzing trace with hash -1688891613, now seen corresponding path program 2 times [2024-06-14 13:51:46,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:51:46,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209726330] [2024-06-14 13:51:46,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:51:46,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:51:46,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:51:46,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:51:46,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:51:46,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209726330] [2024-06-14 13:51:46,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209726330] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:51:46,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:51:46,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:51:46,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531570115] [2024-06-14 13:51:46,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:51:46,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:51:46,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:51:46,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:51:46,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:51:46,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-14 13:51:46,657 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 114 transitions, 1056 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:46,657 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:51:46,657 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-14 13:51:46,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:51:46,852 INFO L124 PetriNetUnfolderBase]: 1038/1722 cut-off events. [2024-06-14 13:51:46,853 INFO L125 PetriNetUnfolderBase]: For 16886/16921 co-relation queries the response was YES. [2024-06-14 13:51:46,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9237 conditions, 1722 events. 1038/1722 cut-off events. For 16886/16921 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 9018 event pairs, 252 based on Foata normal form. 11/1676 useless extension candidates. Maximal degree in co-relation 9190. Up to 1417 conditions per place. [2024-06-14 13:51:46,868 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 92 selfloop transitions, 22 changer transitions 0/132 dead transitions. [2024-06-14 13:51:46,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 132 transitions, 1348 flow [2024-06-14 13:51:46,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:51:46,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:51:46,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 125 transitions. [2024-06-14 13:51:46,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-14 13:51:46,870 INFO L175 Difference]: Start difference. First operand has 93 places, 114 transitions, 1056 flow. Second operand 5 states and 125 transitions. [2024-06-14 13:51:46,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 132 transitions, 1348 flow [2024-06-14 13:51:46,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 132 transitions, 1307 flow, removed 14 selfloop flow, removed 1 redundant places. [2024-06-14 13:51:46,897 INFO L231 Difference]: Finished difference. Result has 97 places, 114 transitions, 1067 flow [2024-06-14 13:51:46,897 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1015, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1067, PETRI_PLACES=97, PETRI_TRANSITIONS=114} [2024-06-14 13:51:46,898 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 55 predicate places. [2024-06-14 13:51:46,898 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 114 transitions, 1067 flow [2024-06-14 13:51:46,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:46,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:51:46,899 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:51:46,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-14 13:51:46,899 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:51:46,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:51:46,899 INFO L85 PathProgramCache]: Analyzing trace with hash -1625259129, now seen corresponding path program 1 times [2024-06-14 13:51:46,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:51:46,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956345223] [2024-06-14 13:51:46,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:51:46,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:51:46,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:51:47,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:51:47,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:51:47,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956345223] [2024-06-14 13:51:47,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956345223] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:51:47,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:51:47,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:51:47,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545919513] [2024-06-14 13:51:47,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:51:47,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:51:47,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:51:47,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:51:47,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:51:47,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:51:47,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 114 transitions, 1067 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:47,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:51:47,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:51:47,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:51:47,418 INFO L124 PetriNetUnfolderBase]: 1383/2282 cut-off events. [2024-06-14 13:51:47,418 INFO L125 PetriNetUnfolderBase]: For 25807/25811 co-relation queries the response was YES. [2024-06-14 13:51:47,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11446 conditions, 2282 events. 1383/2282 cut-off events. For 25807/25811 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 12421 event pairs, 327 based on Foata normal form. 75/2354 useless extension candidates. Maximal degree in co-relation 11397. Up to 1438 conditions per place. [2024-06-14 13:51:47,438 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 82 selfloop transitions, 64 changer transitions 0/152 dead transitions. [2024-06-14 13:51:47,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 152 transitions, 1581 flow [2024-06-14 13:51:47,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:51:47,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:51:47,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-14 13:51:47,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6158536585365854 [2024-06-14 13:51:47,440 INFO L175 Difference]: Start difference. First operand has 97 places, 114 transitions, 1067 flow. Second operand 8 states and 202 transitions. [2024-06-14 13:51:47,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 152 transitions, 1581 flow [2024-06-14 13:51:47,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 152 transitions, 1528 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-14 13:51:47,477 INFO L231 Difference]: Finished difference. Result has 101 places, 118 transitions, 1218 flow [2024-06-14 13:51:47,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1014, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1218, PETRI_PLACES=101, PETRI_TRANSITIONS=118} [2024-06-14 13:51:47,479 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 59 predicate places. [2024-06-14 13:51:47,479 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 118 transitions, 1218 flow [2024-06-14 13:51:47,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:47,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:51:47,479 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:51:47,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-14 13:51:47,479 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:51:47,480 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:51:47,480 INFO L85 PathProgramCache]: Analyzing trace with hash 2110953095, now seen corresponding path program 2 times [2024-06-14 13:51:47,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:51:47,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234491369] [2024-06-14 13:51:47,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:51:47,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:51:47,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:51:47,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:51:47,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:51:47,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234491369] [2024-06-14 13:51:47,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234491369] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:51:47,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:51:47,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:51:47,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095391236] [2024-06-14 13:51:47,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:51:47,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:51:47,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:51:47,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:51:47,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:51:47,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:51:47,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 118 transitions, 1218 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:47,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:51:47,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:51:47,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:51:47,961 INFO L124 PetriNetUnfolderBase]: 1400/2303 cut-off events. [2024-06-14 13:51:47,961 INFO L125 PetriNetUnfolderBase]: For 22102/22106 co-relation queries the response was YES. [2024-06-14 13:51:47,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12335 conditions, 2303 events. 1400/2303 cut-off events. For 22102/22106 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 12483 event pairs, 379 based on Foata normal form. 5/2303 useless extension candidates. Maximal degree in co-relation 12285. Up to 2006 conditions per place. [2024-06-14 13:51:47,983 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 105 selfloop transitions, 34 changer transitions 0/145 dead transitions. [2024-06-14 13:51:47,984 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 145 transitions, 1593 flow [2024-06-14 13:51:47,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:51:47,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:51:47,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-14 13:51:47,985 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-14 13:51:47,985 INFO L175 Difference]: Start difference. First operand has 101 places, 118 transitions, 1218 flow. Second operand 7 states and 164 transitions. [2024-06-14 13:51:47,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 145 transitions, 1593 flow [2024-06-14 13:51:48,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 145 transitions, 1431 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-14 13:51:48,089 INFO L231 Difference]: Finished difference. Result has 102 places, 120 transitions, 1165 flow [2024-06-14 13:51:48,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1058, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1165, PETRI_PLACES=102, PETRI_TRANSITIONS=120} [2024-06-14 13:51:48,090 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 60 predicate places. [2024-06-14 13:51:48,091 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 120 transitions, 1165 flow [2024-06-14 13:51:48,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:48,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:51:48,091 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:51:48,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-14 13:51:48,092 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:51:48,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:51:48,093 INFO L85 PathProgramCache]: Analyzing trace with hash 2119523975, now seen corresponding path program 3 times [2024-06-14 13:51:48,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:51:48,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056540197] [2024-06-14 13:51:48,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:51:48,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:51:48,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:51:48,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:51:48,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:51:48,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056540197] [2024-06-14 13:51:48,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056540197] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:51:48,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:51:48,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:51:48,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366502169] [2024-06-14 13:51:48,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:51:48,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:51:48,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:51:48,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:51:48,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:51:48,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:51:48,302 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 120 transitions, 1165 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:48,302 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:51:48,302 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:51:48,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:51:48,625 INFO L124 PetriNetUnfolderBase]: 1392/2291 cut-off events. [2024-06-14 13:51:48,625 INFO L125 PetriNetUnfolderBase]: For 19929/19933 co-relation queries the response was YES. [2024-06-14 13:51:48,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11493 conditions, 2291 events. 1392/2291 cut-off events. For 19929/19933 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 12387 event pairs, 336 based on Foata normal form. 5/2291 useless extension candidates. Maximal degree in co-relation 11442. Up to 1843 conditions per place. [2024-06-14 13:51:48,642 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 107 selfloop transitions, 39 changer transitions 0/152 dead transitions. [2024-06-14 13:51:48,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 152 transitions, 1580 flow [2024-06-14 13:51:48,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:51:48,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:51:48,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-14 13:51:48,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-14 13:51:48,644 INFO L175 Difference]: Start difference. First operand has 102 places, 120 transitions, 1165 flow. Second operand 7 states and 168 transitions. [2024-06-14 13:51:48,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 152 transitions, 1580 flow [2024-06-14 13:51:48,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 152 transitions, 1491 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-14 13:51:48,681 INFO L231 Difference]: Finished difference. Result has 105 places, 123 transitions, 1213 flow [2024-06-14 13:51:48,681 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1076, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1213, PETRI_PLACES=105, PETRI_TRANSITIONS=123} [2024-06-14 13:51:48,682 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 63 predicate places. [2024-06-14 13:51:48,682 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 123 transitions, 1213 flow [2024-06-14 13:51:48,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:48,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:51:48,682 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:51:48,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-14 13:51:48,683 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:51:48,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:51:48,683 INFO L85 PathProgramCache]: Analyzing trace with hash 813746065, now seen corresponding path program 1 times [2024-06-14 13:51:48,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:51:48,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780718505] [2024-06-14 13:51:48,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:51:48,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:51:48,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:51:48,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:51:48,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:51:48,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780718505] [2024-06-14 13:51:48,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780718505] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:51:48,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:51:48,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:51:48,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817617146] [2024-06-14 13:51:48,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:51:48,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:51:48,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:51:48,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:51:48,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:51:48,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:51:48,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 123 transitions, 1213 flow. Second operand has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:48,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:51:48,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:51:48,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:51:49,397 INFO L124 PetriNetUnfolderBase]: 2251/3775 cut-off events. [2024-06-14 13:51:49,397 INFO L125 PetriNetUnfolderBase]: For 50064/50070 co-relation queries the response was YES. [2024-06-14 13:51:49,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19019 conditions, 3775 events. 2251/3775 cut-off events. For 50064/50070 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 23448 event pairs, 437 based on Foata normal form. 57/3830 useless extension candidates. Maximal degree in co-relation 18966. Up to 1439 conditions per place. [2024-06-14 13:51:49,428 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 123 selfloop transitions, 61 changer transitions 0/190 dead transitions. [2024-06-14 13:51:49,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 190 transitions, 2113 flow [2024-06-14 13:51:49,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:51:49,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:51:49,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 194 transitions. [2024-06-14 13:51:49,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6759581881533101 [2024-06-14 13:51:49,429 INFO L175 Difference]: Start difference. First operand has 105 places, 123 transitions, 1213 flow. Second operand 7 states and 194 transitions. [2024-06-14 13:51:49,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 190 transitions, 2113 flow [2024-06-14 13:51:49,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 190 transitions, 2020 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-14 13:51:49,507 INFO L231 Difference]: Finished difference. Result has 110 places, 137 transitions, 1502 flow [2024-06-14 13:51:49,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1120, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1502, PETRI_PLACES=110, PETRI_TRANSITIONS=137} [2024-06-14 13:51:49,507 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 68 predicate places. [2024-06-14 13:51:49,507 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 137 transitions, 1502 flow [2024-06-14 13:51:49,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:49,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:51:49,508 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:51:49,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-14 13:51:49,508 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:51:49,508 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:51:49,508 INFO L85 PathProgramCache]: Analyzing trace with hash 819187891, now seen corresponding path program 2 times [2024-06-14 13:51:49,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:51:49,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108279992] [2024-06-14 13:51:49,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:51:49,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:51:49,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:51:49,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:51:49,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:51:49,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108279992] [2024-06-14 13:51:49,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108279992] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:51:49,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:51:49,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:51:49,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771762098] [2024-06-14 13:51:49,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:51:49,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:51:49,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:51:49,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:51:49,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:51:49,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:51:49,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 137 transitions, 1502 flow. Second operand has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:49,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:51:49,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:51:49,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:51:50,323 INFO L124 PetriNetUnfolderBase]: 2629/4462 cut-off events. [2024-06-14 13:51:50,323 INFO L125 PetriNetUnfolderBase]: For 65904/65908 co-relation queries the response was YES. [2024-06-14 13:51:50,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23253 conditions, 4462 events. 2629/4462 cut-off events. For 65904/65908 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 29211 event pairs, 797 based on Foata normal form. 55/4514 useless extension candidates. Maximal degree in co-relation 23197. Up to 2665 conditions per place. [2024-06-14 13:51:50,363 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 113 selfloop transitions, 71 changer transitions 0/190 dead transitions. [2024-06-14 13:51:50,364 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 190 transitions, 2272 flow [2024-06-14 13:51:50,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:51:50,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:51:50,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 212 transitions. [2024-06-14 13:51:50,365 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6463414634146342 [2024-06-14 13:51:50,365 INFO L175 Difference]: Start difference. First operand has 110 places, 137 transitions, 1502 flow. Second operand 8 states and 212 transitions. [2024-06-14 13:51:50,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 190 transitions, 2272 flow [2024-06-14 13:51:50,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 190 transitions, 2115 flow, removed 59 selfloop flow, removed 1 redundant places. [2024-06-14 13:51:50,486 INFO L231 Difference]: Finished difference. Result has 118 places, 146 transitions, 1693 flow [2024-06-14 13:51:50,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1369, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1693, PETRI_PLACES=118, PETRI_TRANSITIONS=146} [2024-06-14 13:51:50,487 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 76 predicate places. [2024-06-14 13:51:50,487 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 146 transitions, 1693 flow [2024-06-14 13:51:50,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:50,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:51:50,488 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:51:50,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-14 13:51:50,488 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:51:50,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:51:50,488 INFO L85 PathProgramCache]: Analyzing trace with hash -748375787, now seen corresponding path program 3 times [2024-06-14 13:51:50,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:51:50,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655601891] [2024-06-14 13:51:50,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:51:50,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:51:50,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:51:50,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:51:50,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:51:50,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655601891] [2024-06-14 13:51:50,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655601891] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:51:50,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:51:50,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:51:50,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504157731] [2024-06-14 13:51:50,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:51:50,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:51:50,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:51:50,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:51:50,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:51:50,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:51:50,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 146 transitions, 1693 flow. Second operand has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:50,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:51:50,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:51:50,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:51:51,496 INFO L124 PetriNetUnfolderBase]: 3054/5228 cut-off events. [2024-06-14 13:51:51,496 INFO L125 PetriNetUnfolderBase]: For 81107/81113 co-relation queries the response was YES. [2024-06-14 13:51:51,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27342 conditions, 5228 events. 3054/5228 cut-off events. For 81107/81113 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 35587 event pairs, 943 based on Foata normal form. 48/5275 useless extension candidates. Maximal degree in co-relation 27282. Up to 3708 conditions per place. [2024-06-14 13:51:51,543 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 134 selfloop transitions, 61 changer transitions 0/201 dead transitions. [2024-06-14 13:51:51,543 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 201 transitions, 2482 flow [2024-06-14 13:51:51,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:51:51,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:51:51,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 211 transitions. [2024-06-14 13:51:51,544 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6432926829268293 [2024-06-14 13:51:51,544 INFO L175 Difference]: Start difference. First operand has 118 places, 146 transitions, 1693 flow. Second operand 8 states and 211 transitions. [2024-06-14 13:51:51,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 201 transitions, 2482 flow [2024-06-14 13:51:51,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 201 transitions, 2297 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-14 13:51:51,672 INFO L231 Difference]: Finished difference. Result has 121 places, 152 transitions, 1756 flow [2024-06-14 13:51:51,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1508, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1756, PETRI_PLACES=121, PETRI_TRANSITIONS=152} [2024-06-14 13:51:51,673 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 79 predicate places. [2024-06-14 13:51:51,673 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 152 transitions, 1756 flow [2024-06-14 13:51:51,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:51,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:51:51,673 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:51:51,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-14 13:51:51,674 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:51:51,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:51:51,674 INFO L85 PathProgramCache]: Analyzing trace with hash -1546328807, now seen corresponding path program 4 times [2024-06-14 13:51:51,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:51:51,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154058842] [2024-06-14 13:51:51,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:51:51,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:51:51,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:51:51,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:51:51,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:51:51,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154058842] [2024-06-14 13:51:51,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154058842] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:51:51,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:51:51,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:51:51,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614844474] [2024-06-14 13:51:51,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:51:51,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:51:51,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:51:51,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:51:51,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:51:51,909 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:51:51,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 152 transitions, 1756 flow. Second operand has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:51,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:51:51,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:51:51,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:51:52,724 INFO L124 PetriNetUnfolderBase]: 3241/5569 cut-off events. [2024-06-14 13:51:52,724 INFO L125 PetriNetUnfolderBase]: For 87298/87304 co-relation queries the response was YES. [2024-06-14 13:51:52,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28621 conditions, 5569 events. 3241/5569 cut-off events. For 87298/87304 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 38652 event pairs, 1329 based on Foata normal form. 53/5620 useless extension candidates. Maximal degree in co-relation 28560. Up to 4628 conditions per place. [2024-06-14 13:51:52,764 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 122 selfloop transitions, 53 changer transitions 0/181 dead transitions. [2024-06-14 13:51:52,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 181 transitions, 2264 flow [2024-06-14 13:51:52,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:51:52,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:51:52,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-14 13:51:52,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6027874564459931 [2024-06-14 13:51:52,765 INFO L175 Difference]: Start difference. First operand has 121 places, 152 transitions, 1756 flow. Second operand 7 states and 173 transitions. [2024-06-14 13:51:52,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 181 transitions, 2264 flow [2024-06-14 13:51:52,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 181 transitions, 2154 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-14 13:51:52,995 INFO L231 Difference]: Finished difference. Result has 124 places, 154 transitions, 1809 flow [2024-06-14 13:51:52,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1648, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1809, PETRI_PLACES=124, PETRI_TRANSITIONS=154} [2024-06-14 13:51:52,996 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 82 predicate places. [2024-06-14 13:51:52,997 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 154 transitions, 1809 flow [2024-06-14 13:51:52,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:52,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:51:52,997 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:51:52,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-14 13:51:52,997 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:51:52,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:51:52,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1551691187, now seen corresponding path program 5 times [2024-06-14 13:51:52,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:51:52,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255284214] [2024-06-14 13:51:52,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:51:52,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:51:53,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:51:53,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:51:53,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:51:53,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255284214] [2024-06-14 13:51:53,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255284214] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:51:53,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:51:53,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:51:53,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162719162] [2024-06-14 13:51:53,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:51:53,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:51:53,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:51:53,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:51:53,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:51:53,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:51:53,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 154 transitions, 1809 flow. Second operand has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:53,198 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:51:53,198 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:51:53,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:51:54,026 INFO L124 PetriNetUnfolderBase]: 3296/5662 cut-off events. [2024-06-14 13:51:54,036 INFO L125 PetriNetUnfolderBase]: For 90665/90671 co-relation queries the response was YES. [2024-06-14 13:51:54,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28709 conditions, 5662 events. 3296/5662 cut-off events. For 90665/90671 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 39641 event pairs, 1320 based on Foata normal form. 56/5717 useless extension candidates. Maximal degree in co-relation 28646. Up to 4737 conditions per place. [2024-06-14 13:51:54,170 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 131 selfloop transitions, 58 changer transitions 0/195 dead transitions. [2024-06-14 13:51:54,170 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 195 transitions, 2426 flow [2024-06-14 13:51:54,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:51:54,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:51:54,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-14 13:51:54,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6219512195121951 [2024-06-14 13:51:54,172 INFO L175 Difference]: Start difference. First operand has 124 places, 154 transitions, 1809 flow. Second operand 8 states and 204 transitions. [2024-06-14 13:51:54,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 195 transitions, 2426 flow [2024-06-14 13:51:54,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 195 transitions, 2301 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-14 13:51:54,407 INFO L231 Difference]: Finished difference. Result has 127 places, 156 transitions, 1859 flow [2024-06-14 13:51:54,407 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1684, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1859, PETRI_PLACES=127, PETRI_TRANSITIONS=156} [2024-06-14 13:51:54,408 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 85 predicate places. [2024-06-14 13:51:54,408 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 156 transitions, 1859 flow [2024-06-14 13:51:54,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:54,408 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:51:54,408 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:51:54,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-14 13:51:54,409 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:51:54,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:51:54,409 INFO L85 PathProgramCache]: Analyzing trace with hash -1546113605, now seen corresponding path program 1 times [2024-06-14 13:51:54,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:51:54,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347414792] [2024-06-14 13:51:54,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:51:54,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:51:54,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:51:54,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:51:54,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:51:54,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347414792] [2024-06-14 13:51:54,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347414792] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:51:54,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:51:54,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:51:54,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845127831] [2024-06-14 13:51:54,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:51:54,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:51:54,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:51:54,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:51:54,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:51:54,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:51:54,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 156 transitions, 1859 flow. Second operand has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:54,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:51:54,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:51:54,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:51:55,406 INFO L124 PetriNetUnfolderBase]: 3353/5803 cut-off events. [2024-06-14 13:51:55,406 INFO L125 PetriNetUnfolderBase]: For 90267/90273 co-relation queries the response was YES. [2024-06-14 13:51:55,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28819 conditions, 5803 events. 3353/5803 cut-off events. For 90267/90273 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 41165 event pairs, 1190 based on Foata normal form. 45/5842 useless extension candidates. Maximal degree in co-relation 28755. Up to 3809 conditions per place. [2024-06-14 13:51:55,452 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 122 selfloop transitions, 62 changer transitions 0/190 dead transitions. [2024-06-14 13:51:55,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 190 transitions, 2399 flow [2024-06-14 13:51:55,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:51:55,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:51:55,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-14 13:51:55,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6202090592334495 [2024-06-14 13:51:55,454 INFO L175 Difference]: Start difference. First operand has 127 places, 156 transitions, 1859 flow. Second operand 7 states and 178 transitions. [2024-06-14 13:51:55,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 190 transitions, 2399 flow [2024-06-14 13:51:55,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 190 transitions, 2260 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-14 13:51:55,614 INFO L231 Difference]: Finished difference. Result has 128 places, 157 transitions, 1880 flow [2024-06-14 13:51:55,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1720, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1880, PETRI_PLACES=128, PETRI_TRANSITIONS=157} [2024-06-14 13:51:55,629 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 86 predicate places. [2024-06-14 13:51:55,629 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 157 transitions, 1880 flow [2024-06-14 13:51:55,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:55,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:51:55,634 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:51:55,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-14 13:51:55,634 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:51:55,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:51:55,635 INFO L85 PathProgramCache]: Analyzing trace with hash 564902843, now seen corresponding path program 6 times [2024-06-14 13:51:55,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:51:55,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519807296] [2024-06-14 13:51:55,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:51:55,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:51:55,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:51:55,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:51:55,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:51:55,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519807296] [2024-06-14 13:51:55,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519807296] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:51:55,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:51:55,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:51:55,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732329438] [2024-06-14 13:51:55,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:51:55,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:51:55,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:51:55,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:51:55,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:51:56,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:51:56,014 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 157 transitions, 1880 flow. Second operand has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:56,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:51:56,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:51:56,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:51:56,728 INFO L124 PetriNetUnfolderBase]: 3386/5868 cut-off events. [2024-06-14 13:51:56,728 INFO L125 PetriNetUnfolderBase]: For 89643/89649 co-relation queries the response was YES. [2024-06-14 13:51:56,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29237 conditions, 5868 events. 3386/5868 cut-off events. For 89643/89649 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 41846 event pairs, 1415 based on Foata normal form. 19/5885 useless extension candidates. Maximal degree in co-relation 29172. Up to 5238 conditions per place. [2024-06-14 13:51:56,770 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 151 selfloop transitions, 29 changer transitions 0/186 dead transitions. [2024-06-14 13:51:56,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 186 transitions, 2340 flow [2024-06-14 13:51:56,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:51:56,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:51:56,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-14 13:51:56,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5679442508710801 [2024-06-14 13:51:56,772 INFO L175 Difference]: Start difference. First operand has 128 places, 157 transitions, 1880 flow. Second operand 7 states and 163 transitions. [2024-06-14 13:51:56,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 186 transitions, 2340 flow [2024-06-14 13:51:56,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 186 transitions, 2159 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-14 13:51:56,928 INFO L231 Difference]: Finished difference. Result has 129 places, 158 transitions, 1782 flow [2024-06-14 13:51:56,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1699, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1782, PETRI_PLACES=129, PETRI_TRANSITIONS=158} [2024-06-14 13:51:56,929 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 87 predicate places. [2024-06-14 13:51:56,929 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 158 transitions, 1782 flow [2024-06-14 13:51:56,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:56,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:51:56,930 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:51:56,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-14 13:51:56,930 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:51:56,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:51:56,930 INFO L85 PathProgramCache]: Analyzing trace with hash 565118045, now seen corresponding path program 2 times [2024-06-14 13:51:56,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:51:56,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735475300] [2024-06-14 13:51:56,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:51:56,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:51:56,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:51:57,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:51:57,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:51:57,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735475300] [2024-06-14 13:51:57,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735475300] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:51:57,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:51:57,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:51:57,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753344947] [2024-06-14 13:51:57,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:51:57,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:51:57,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:51:57,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:51:57,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:51:57,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:51:57,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 158 transitions, 1782 flow. Second operand has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:57,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:51:57,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:51:57,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:51:57,954 INFO L124 PetriNetUnfolderBase]: 3427/5949 cut-off events. [2024-06-14 13:51:57,955 INFO L125 PetriNetUnfolderBase]: For 93120/93126 co-relation queries the response was YES. [2024-06-14 13:51:57,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29121 conditions, 5949 events. 3427/5949 cut-off events. For 93120/93126 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 42546 event pairs, 1415 based on Foata normal form. 15/5962 useless extension candidates. Maximal degree in co-relation 29056. Up to 5222 conditions per place. [2024-06-14 13:51:58,008 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 153 selfloop transitions, 31 changer transitions 0/190 dead transitions. [2024-06-14 13:51:58,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 190 transitions, 2264 flow [2024-06-14 13:51:58,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:51:58,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:51:58,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-14 13:51:58,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.578397212543554 [2024-06-14 13:51:58,010 INFO L175 Difference]: Start difference. First operand has 129 places, 158 transitions, 1782 flow. Second operand 7 states and 166 transitions. [2024-06-14 13:51:58,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 190 transitions, 2264 flow [2024-06-14 13:51:58,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 190 transitions, 2197 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-14 13:51:58,173 INFO L231 Difference]: Finished difference. Result has 131 places, 159 transitions, 1803 flow [2024-06-14 13:51:58,173 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1715, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1803, PETRI_PLACES=131, PETRI_TRANSITIONS=159} [2024-06-14 13:51:58,174 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 89 predicate places. [2024-06-14 13:51:58,175 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 159 transitions, 1803 flow [2024-06-14 13:51:58,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:58,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:51:58,176 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:51:58,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-14 13:51:58,176 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:51:58,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:51:58,178 INFO L85 PathProgramCache]: Analyzing trace with hash 830815325, now seen corresponding path program 3 times [2024-06-14 13:51:58,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:51:58,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102512440] [2024-06-14 13:51:58,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:51:58,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:51:58,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:51:58,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:51:58,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:51:58,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102512440] [2024-06-14 13:51:58,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102512440] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:51:58,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:51:58,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:51:58,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172314241] [2024-06-14 13:51:58,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:51:58,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:51:58,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:51:58,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:51:58,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:51:58,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:51:58,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 159 transitions, 1803 flow. Second operand has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:58,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:51:58,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:51:58,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:51:59,239 INFO L124 PetriNetUnfolderBase]: 3407/5917 cut-off events. [2024-06-14 13:51:59,240 INFO L125 PetriNetUnfolderBase]: For 96230/96236 co-relation queries the response was YES. [2024-06-14 13:51:59,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28946 conditions, 5917 events. 3407/5917 cut-off events. For 96230/96236 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 41878 event pairs, 1355 based on Foata normal form. 15/5930 useless extension candidates. Maximal degree in co-relation 28880. Up to 4717 conditions per place. [2024-06-14 13:51:59,280 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 146 selfloop transitions, 38 changer transitions 0/190 dead transitions. [2024-06-14 13:51:59,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 190 transitions, 2221 flow [2024-06-14 13:51:59,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:51:59,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:51:59,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-14 13:51:59,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5749128919860628 [2024-06-14 13:51:59,283 INFO L175 Difference]: Start difference. First operand has 131 places, 159 transitions, 1803 flow. Second operand 7 states and 165 transitions. [2024-06-14 13:51:59,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 190 transitions, 2221 flow [2024-06-14 13:51:59,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 190 transitions, 2145 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-14 13:51:59,465 INFO L231 Difference]: Finished difference. Result has 132 places, 158 transitions, 1759 flow [2024-06-14 13:51:59,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1679, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1759, PETRI_PLACES=132, PETRI_TRANSITIONS=158} [2024-06-14 13:51:59,467 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 90 predicate places. [2024-06-14 13:51:59,467 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 158 transitions, 1759 flow [2024-06-14 13:51:59,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:59,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:51:59,481 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:51:59,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-14 13:51:59,481 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)] === [2024-06-14 13:51:59,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:51:59,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1727896362, now seen corresponding path program 1 times [2024-06-14 13:51:59,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:51:59,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936280371] [2024-06-14 13:51:59,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:51:59,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:51:59,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:51:59,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:51:59,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:51:59,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936280371] [2024-06-14 13:51:59,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936280371] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:51:59,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:51:59,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:51:59,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457601002] [2024-06-14 13:51:59,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:51:59,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:51:59,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:51:59,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:51:59,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:51:59,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:51:59,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 158 transitions, 1759 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:59,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:51:59,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:51:59,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:00,352 INFO L124 PetriNetUnfolderBase]: 3404/5927 cut-off events. [2024-06-14 13:52:00,352 INFO L125 PetriNetUnfolderBase]: For 97865/97869 co-relation queries the response was YES. [2024-06-14 13:52:00,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29186 conditions, 5927 events. 3404/5927 cut-off events. For 97865/97869 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 42463 event pairs, 1387 based on Foata normal form. 5/5931 useless extension candidates. Maximal degree in co-relation 29119. Up to 5467 conditions per place. [2024-06-14 13:52:00,400 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 153 selfloop transitions, 13 changer transitions 0/172 dead transitions. [2024-06-14 13:52:00,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 172 transitions, 2168 flow [2024-06-14 13:52:00,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:52:00,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:52:00,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 111 transitions. [2024-06-14 13:52:00,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5414634146341464 [2024-06-14 13:52:00,402 INFO L175 Difference]: Start difference. First operand has 132 places, 158 transitions, 1759 flow. Second operand 5 states and 111 transitions. [2024-06-14 13:52:00,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 172 transitions, 2168 flow [2024-06-14 13:52:00,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 172 transitions, 2093 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-14 13:52:00,593 INFO L231 Difference]: Finished difference. Result has 133 places, 161 transitions, 1762 flow [2024-06-14 13:52:00,593 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1686, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1762, PETRI_PLACES=133, PETRI_TRANSITIONS=161} [2024-06-14 13:52:00,594 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 91 predicate places. [2024-06-14 13:52:00,594 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 161 transitions, 1762 flow [2024-06-14 13:52:00,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:00,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:00,594 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:00,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-14 13:52:00,595 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)] === [2024-06-14 13:52:00,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:00,595 INFO L85 PathProgramCache]: Analyzing trace with hash 1550413488, now seen corresponding path program 1 times [2024-06-14 13:52:00,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:00,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424896904] [2024-06-14 13:52:00,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:00,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:00,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:00,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:00,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:00,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424896904] [2024-06-14 13:52:00,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424896904] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:00,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:00,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:52:00,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827966479] [2024-06-14 13:52:00,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:00,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:52:00,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:00,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:52:00,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:52:00,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:00,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 161 transitions, 1762 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:00,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:00,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:00,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:01,510 INFO L124 PetriNetUnfolderBase]: 3401/5933 cut-off events. [2024-06-14 13:52:01,511 INFO L125 PetriNetUnfolderBase]: For 103132/103132 co-relation queries the response was YES. [2024-06-14 13:52:01,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29584 conditions, 5933 events. 3401/5933 cut-off events. For 103132/103132 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 42670 event pairs, 1363 based on Foata normal form. 1/5933 useless extension candidates. Maximal degree in co-relation 29516. Up to 5442 conditions per place. [2024-06-14 13:52:01,561 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 162 selfloop transitions, 29 changer transitions 0/197 dead transitions. [2024-06-14 13:52:01,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 197 transitions, 2459 flow [2024-06-14 13:52:01,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:52:01,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:52:01,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 139 transitions. [2024-06-14 13:52:01,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5650406504065041 [2024-06-14 13:52:01,563 INFO L175 Difference]: Start difference. First operand has 133 places, 161 transitions, 1762 flow. Second operand 6 states and 139 transitions. [2024-06-14 13:52:01,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 197 transitions, 2459 flow [2024-06-14 13:52:01,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 197 transitions, 2397 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-14 13:52:01,789 INFO L231 Difference]: Finished difference. Result has 139 places, 178 transitions, 2024 flow [2024-06-14 13:52:01,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1708, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2024, PETRI_PLACES=139, PETRI_TRANSITIONS=178} [2024-06-14 13:52:01,790 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 97 predicate places. [2024-06-14 13:52:01,790 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 178 transitions, 2024 flow [2024-06-14 13:52:01,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:01,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:01,790 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:01,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-14 13:52:01,791 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:01,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:01,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1550533644, now seen corresponding path program 1 times [2024-06-14 13:52:01,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:01,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398363315] [2024-06-14 13:52:01,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:01,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:01,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:01,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:01,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:01,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398363315] [2024-06-14 13:52:01,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398363315] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:01,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:01,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:52:01,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168064933] [2024-06-14 13:52:01,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:01,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:52:01,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:01,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:52:01,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:52:01,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:02,000 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 178 transitions, 2024 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:02,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:02,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:02,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:02,696 INFO L124 PetriNetUnfolderBase]: 3476/6056 cut-off events. [2024-06-14 13:52:02,696 INFO L125 PetriNetUnfolderBase]: For 116116/116120 co-relation queries the response was YES. [2024-06-14 13:52:02,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31692 conditions, 6056 events. 3476/6056 cut-off events. For 116116/116120 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 43639 event pairs, 1390 based on Foata normal form. 7/6060 useless extension candidates. Maximal degree in co-relation 31620. Up to 5451 conditions per place. [2024-06-14 13:52:02,753 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 163 selfloop transitions, 45 changer transitions 2/216 dead transitions. [2024-06-14 13:52:02,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 216 transitions, 2796 flow [2024-06-14 13:52:02,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:52:02,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:52:02,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 160 transitions. [2024-06-14 13:52:02,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5574912891986062 [2024-06-14 13:52:02,754 INFO L175 Difference]: Start difference. First operand has 139 places, 178 transitions, 2024 flow. Second operand 7 states and 160 transitions. [2024-06-14 13:52:02,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 216 transitions, 2796 flow [2024-06-14 13:52:03,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 216 transitions, 2752 flow, removed 22 selfloop flow, removed 0 redundant places. [2024-06-14 13:52:03,080 INFO L231 Difference]: Finished difference. Result has 147 places, 199 transitions, 2413 flow [2024-06-14 13:52:03,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1980, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2413, PETRI_PLACES=147, PETRI_TRANSITIONS=199} [2024-06-14 13:52:03,080 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 105 predicate places. [2024-06-14 13:52:03,081 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 199 transitions, 2413 flow [2024-06-14 13:52:03,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:03,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:03,081 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:03,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-14 13:52:03,081 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:03,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:03,082 INFO L85 PathProgramCache]: Analyzing trace with hash 199098346, now seen corresponding path program 2 times [2024-06-14 13:52:03,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:03,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322808989] [2024-06-14 13:52:03,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:03,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:03,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:03,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:03,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:03,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322808989] [2024-06-14 13:52:03,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322808989] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:03,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:03,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:52:03,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814092058] [2024-06-14 13:52:03,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:03,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:52:03,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:03,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:52:03,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:52:03,288 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:03,289 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 199 transitions, 2413 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:03,289 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:03,289 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:03,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:04,133 INFO L124 PetriNetUnfolderBase]: 3468/6053 cut-off events. [2024-06-14 13:52:04,133 INFO L125 PetriNetUnfolderBase]: For 122390/122394 co-relation queries the response was YES. [2024-06-14 13:52:04,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32088 conditions, 6053 events. 3468/6053 cut-off events. For 122390/122394 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 43612 event pairs, 1388 based on Foata normal form. 7/6057 useless extension candidates. Maximal degree in co-relation 32012. Up to 5296 conditions per place. [2024-06-14 13:52:04,193 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 128 selfloop transitions, 93 changer transitions 1/228 dead transitions. [2024-06-14 13:52:04,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 228 transitions, 3125 flow [2024-06-14 13:52:04,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:52:04,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:52:04,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-14 13:52:04,195 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6062717770034843 [2024-06-14 13:52:04,195 INFO L175 Difference]: Start difference. First operand has 147 places, 199 transitions, 2413 flow. Second operand 7 states and 174 transitions. [2024-06-14 13:52:04,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 228 transitions, 3125 flow [2024-06-14 13:52:04,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 228 transitions, 3031 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-14 13:52:04,449 INFO L231 Difference]: Finished difference. Result has 151 places, 205 transitions, 2621 flow [2024-06-14 13:52:04,449 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2319, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2621, PETRI_PLACES=151, PETRI_TRANSITIONS=205} [2024-06-14 13:52:04,459 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 109 predicate places. [2024-06-14 13:52:04,459 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 205 transitions, 2621 flow [2024-06-14 13:52:04,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:04,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:04,459 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:04,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-14 13:52:04,460 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:04,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:04,460 INFO L85 PathProgramCache]: Analyzing trace with hash 199335496, now seen corresponding path program 3 times [2024-06-14 13:52:04,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:04,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161281411] [2024-06-14 13:52:04,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:04,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:04,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:04,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:04,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:04,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161281411] [2024-06-14 13:52:04,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161281411] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:04,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:04,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:52:04,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655586168] [2024-06-14 13:52:04,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:04,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:52:04,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:04,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:52:04,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:52:04,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:04,791 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 205 transitions, 2621 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:04,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:04,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:04,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:05,577 INFO L124 PetriNetUnfolderBase]: 3384/5892 cut-off events. [2024-06-14 13:52:05,577 INFO L125 PetriNetUnfolderBase]: For 127449/127455 co-relation queries the response was YES. [2024-06-14 13:52:05,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31780 conditions, 5892 events. 3384/5892 cut-off events. For 127449/127455 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 42124 event pairs, 1360 based on Foata normal form. 6/5896 useless extension candidates. Maximal degree in co-relation 31703. Up to 5152 conditions per place. [2024-06-14 13:52:05,637 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 129 selfloop transitions, 83 changer transitions 1/219 dead transitions. [2024-06-14 13:52:05,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 219 transitions, 3139 flow [2024-06-14 13:52:05,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:52:05,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:52:05,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-14 13:52:05,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5813008130081301 [2024-06-14 13:52:05,638 INFO L175 Difference]: Start difference. First operand has 151 places, 205 transitions, 2621 flow. Second operand 6 states and 143 transitions. [2024-06-14 13:52:05,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 219 transitions, 3139 flow [2024-06-14 13:52:05,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 219 transitions, 3001 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-14 13:52:05,910 INFO L231 Difference]: Finished difference. Result has 153 places, 204 transitions, 2646 flow [2024-06-14 13:52:05,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2483, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2646, PETRI_PLACES=153, PETRI_TRANSITIONS=204} [2024-06-14 13:52:05,911 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 111 predicate places. [2024-06-14 13:52:05,911 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 204 transitions, 2646 flow [2024-06-14 13:52:05,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:05,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:05,912 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:05,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-14 13:52:05,912 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:05,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:05,912 INFO L85 PathProgramCache]: Analyzing trace with hash 199344424, now seen corresponding path program 1 times [2024-06-14 13:52:05,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:05,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576117550] [2024-06-14 13:52:05,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:05,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:05,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:06,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:06,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:06,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576117550] [2024-06-14 13:52:06,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576117550] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:06,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:06,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:52:06,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299588084] [2024-06-14 13:52:06,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:06,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:52:06,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:06,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:52:06,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:52:06,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:06,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 204 transitions, 2646 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:06,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:06,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:06,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:06,939 INFO L124 PetriNetUnfolderBase]: 3364/5854 cut-off events. [2024-06-14 13:52:06,939 INFO L125 PetriNetUnfolderBase]: For 133995/133999 co-relation queries the response was YES. [2024-06-14 13:52:06,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31769 conditions, 5854 events. 3364/5854 cut-off events. For 133995/133999 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 41577 event pairs, 1288 based on Foata normal form. 8/5861 useless extension candidates. Maximal degree in co-relation 31691. Up to 5367 conditions per place. [2024-06-14 13:52:07,013 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 195 selfloop transitions, 16 changer transitions 0/217 dead transitions. [2024-06-14 13:52:07,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 217 transitions, 3139 flow [2024-06-14 13:52:07,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:52:07,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:52:07,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 112 transitions. [2024-06-14 13:52:07,014 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5463414634146342 [2024-06-14 13:52:07,014 INFO L175 Difference]: Start difference. First operand has 153 places, 204 transitions, 2646 flow. Second operand 5 states and 112 transitions. [2024-06-14 13:52:07,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 217 transitions, 3139 flow [2024-06-14 13:52:07,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 217 transitions, 2891 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-14 13:52:07,365 INFO L231 Difference]: Finished difference. Result has 152 places, 206 transitions, 2479 flow [2024-06-14 13:52:07,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2398, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2479, PETRI_PLACES=152, PETRI_TRANSITIONS=206} [2024-06-14 13:52:07,365 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 110 predicate places. [2024-06-14 13:52:07,365 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 206 transitions, 2479 flow [2024-06-14 13:52:07,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:07,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:07,366 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:07,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-14 13:52:07,366 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:07,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:07,366 INFO L85 PathProgramCache]: Analyzing trace with hash 126019310, now seen corresponding path program 1 times [2024-06-14 13:52:07,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:07,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711290239] [2024-06-14 13:52:07,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:07,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:07,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:07,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:07,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:07,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711290239] [2024-06-14 13:52:07,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711290239] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:07,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:07,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:07,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119012191] [2024-06-14 13:52:07,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:07,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:07,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:07,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:07,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:07,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:07,723 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 206 transitions, 2479 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:07,723 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:07,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:07,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:08,457 INFO L124 PetriNetUnfolderBase]: 3379/5868 cut-off events. [2024-06-14 13:52:08,457 INFO L125 PetriNetUnfolderBase]: For 139012/139018 co-relation queries the response was YES. [2024-06-14 13:52:08,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31890 conditions, 5868 events. 3379/5868 cut-off events. For 139012/139018 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 41601 event pairs, 1333 based on Foata normal form. 9/5876 useless extension candidates. Maximal degree in co-relation 31811. Up to 5138 conditions per place. [2024-06-14 13:52:08,513 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 141 selfloop transitions, 88 changer transitions 1/236 dead transitions. [2024-06-14 13:52:08,513 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 236 transitions, 3134 flow [2024-06-14 13:52:08,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:52:08,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:52:08,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-14 13:52:08,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6027874564459931 [2024-06-14 13:52:08,515 INFO L175 Difference]: Start difference. First operand has 152 places, 206 transitions, 2479 flow. Second operand 7 states and 173 transitions. [2024-06-14 13:52:08,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 236 transitions, 3134 flow [2024-06-14 13:52:08,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 236 transitions, 3065 flow, removed 21 selfloop flow, removed 3 redundant places. [2024-06-14 13:52:08,806 INFO L231 Difference]: Finished difference. Result has 156 places, 210 transitions, 2654 flow [2024-06-14 13:52:08,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2412, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2654, PETRI_PLACES=156, PETRI_TRANSITIONS=210} [2024-06-14 13:52:08,807 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 114 predicate places. [2024-06-14 13:52:08,807 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 210 transitions, 2654 flow [2024-06-14 13:52:08,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:08,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:08,807 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:08,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-14 13:52:08,808 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:08,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:08,808 INFO L85 PathProgramCache]: Analyzing trace with hash 126030470, now seen corresponding path program 2 times [2024-06-14 13:52:08,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:08,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059445227] [2024-06-14 13:52:08,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:08,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:08,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:09,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:09,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:09,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059445227] [2024-06-14 13:52:09,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059445227] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:09,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:09,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:09,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111942888] [2024-06-14 13:52:09,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:09,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:09,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:09,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:09,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:09,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:09,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 210 transitions, 2654 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:09,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:09,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:09,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:09,829 INFO L124 PetriNetUnfolderBase]: 3312/5745 cut-off events. [2024-06-14 13:52:09,829 INFO L125 PetriNetUnfolderBase]: For 138605/138611 co-relation queries the response was YES. [2024-06-14 13:52:09,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31476 conditions, 5745 events. 3312/5745 cut-off events. For 138605/138611 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 40448 event pairs, 1316 based on Foata normal form. 6/5749 useless extension candidates. Maximal degree in co-relation 31396. Up to 5021 conditions per place. [2024-06-14 13:52:09,890 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 130 selfloop transitions, 83 changer transitions 4/223 dead transitions. [2024-06-14 13:52:09,890 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 223 transitions, 3120 flow [2024-06-14 13:52:09,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:52:09,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:52:09,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-06-14 13:52:09,891 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5772357723577236 [2024-06-14 13:52:09,891 INFO L175 Difference]: Start difference. First operand has 156 places, 210 transitions, 2654 flow. Second operand 6 states and 142 transitions. [2024-06-14 13:52:09,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 223 transitions, 3120 flow [2024-06-14 13:52:10,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 223 transitions, 2959 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-14 13:52:10,170 INFO L231 Difference]: Finished difference. Result has 158 places, 206 transitions, 2619 flow [2024-06-14 13:52:10,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2493, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2619, PETRI_PLACES=158, PETRI_TRANSITIONS=206} [2024-06-14 13:52:10,171 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 116 predicate places. [2024-06-14 13:52:10,171 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 206 transitions, 2619 flow [2024-06-14 13:52:10,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:10,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:10,172 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:10,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-14 13:52:10,172 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:10,172 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:10,172 INFO L85 PathProgramCache]: Analyzing trace with hash 62556716, now seen corresponding path program 3 times [2024-06-14 13:52:10,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:10,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325272723] [2024-06-14 13:52:10,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:10,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:10,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:10,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:10,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:10,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325272723] [2024-06-14 13:52:10,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325272723] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:10,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:10,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:10,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136945354] [2024-06-14 13:52:10,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:10,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:10,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:10,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:10,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:10,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:10,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 206 transitions, 2619 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:10,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:10,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:10,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:11,203 INFO L124 PetriNetUnfolderBase]: 3039/5252 cut-off events. [2024-06-14 13:52:11,203 INFO L125 PetriNetUnfolderBase]: For 148124/148130 co-relation queries the response was YES. [2024-06-14 13:52:11,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30482 conditions, 5252 events. 3039/5252 cut-off events. For 148124/148130 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 35773 event pairs, 1144 based on Foata normal form. 6/5256 useless extension candidates. Maximal degree in co-relation 30401. Up to 4466 conditions per place. [2024-06-14 13:52:11,256 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 137 selfloop transitions, 99 changer transitions 0/242 dead transitions. [2024-06-14 13:52:11,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 242 transitions, 3585 flow [2024-06-14 13:52:11,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:52:11,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:52:11,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-14 13:52:11,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5749128919860628 [2024-06-14 13:52:11,258 INFO L175 Difference]: Start difference. First operand has 158 places, 206 transitions, 2619 flow. Second operand 7 states and 165 transitions. [2024-06-14 13:52:11,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 242 transitions, 3585 flow [2024-06-14 13:52:11,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 242 transitions, 3340 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-14 13:52:11,559 INFO L231 Difference]: Finished difference. Result has 160 places, 223 transitions, 2868 flow [2024-06-14 13:52:11,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2374, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2868, PETRI_PLACES=160, PETRI_TRANSITIONS=223} [2024-06-14 13:52:11,560 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 118 predicate places. [2024-06-14 13:52:11,560 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 223 transitions, 2868 flow [2024-06-14 13:52:11,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:11,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:11,560 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:11,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-14 13:52:11,561 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)] === [2024-06-14 13:52:11,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:11,561 INFO L85 PathProgramCache]: Analyzing trace with hash 835250642, now seen corresponding path program 1 times [2024-06-14 13:52:11,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:11,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432353028] [2024-06-14 13:52:11,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:11,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:11,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:11,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:11,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:11,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432353028] [2024-06-14 13:52:11,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432353028] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:11,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:11,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:11,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130457107] [2024-06-14 13:52:11,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:11,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:11,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:11,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:11,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:11,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:11,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 223 transitions, 2868 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:11,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:11,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:11,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:12,442 INFO L124 PetriNetUnfolderBase]: 3036/5247 cut-off events. [2024-06-14 13:52:12,442 INFO L125 PetriNetUnfolderBase]: For 158448/158448 co-relation queries the response was YES. [2024-06-14 13:52:12,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31928 conditions, 5247 events. 3036/5247 cut-off events. For 158448/158448 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 35694 event pairs, 1116 based on Foata normal form. 1/5247 useless extension candidates. Maximal degree in co-relation 31844. Up to 4764 conditions per place. [2024-06-14 13:52:12,499 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 196 selfloop transitions, 41 changer transitions 0/243 dead transitions. [2024-06-14 13:52:12,499 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 243 transitions, 3425 flow [2024-06-14 13:52:12,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:52:12,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:52:12,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 155 transitions. [2024-06-14 13:52:12,500 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5400696864111498 [2024-06-14 13:52:12,500 INFO L175 Difference]: Start difference. First operand has 160 places, 223 transitions, 2868 flow. Second operand 7 states and 155 transitions. [2024-06-14 13:52:12,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 243 transitions, 3425 flow [2024-06-14 13:52:12,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 243 transitions, 3253 flow, removed 55 selfloop flow, removed 2 redundant places. [2024-06-14 13:52:12,877 INFO L231 Difference]: Finished difference. Result has 165 places, 223 transitions, 2790 flow [2024-06-14 13:52:12,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2702, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2790, PETRI_PLACES=165, PETRI_TRANSITIONS=223} [2024-06-14 13:52:12,877 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 123 predicate places. [2024-06-14 13:52:12,878 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 223 transitions, 2790 flow [2024-06-14 13:52:12,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:12,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:12,878 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:12,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-14 13:52:12,878 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)] === [2024-06-14 13:52:12,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:12,879 INFO L85 PathProgramCache]: Analyzing trace with hash 700933837, now seen corresponding path program 1 times [2024-06-14 13:52:12,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:12,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276957273] [2024-06-14 13:52:12,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:12,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:12,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:13,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:13,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:13,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276957273] [2024-06-14 13:52:13,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276957273] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:13,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:13,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:13,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074852368] [2024-06-14 13:52:13,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:13,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:13,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:13,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:13,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:13,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:13,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 223 transitions, 2790 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:13,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:13,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:13,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:13,863 INFO L124 PetriNetUnfolderBase]: 3078/5307 cut-off events. [2024-06-14 13:52:13,863 INFO L125 PetriNetUnfolderBase]: For 167602/167606 co-relation queries the response was YES. [2024-06-14 13:52:13,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32194 conditions, 5307 events. 3078/5307 cut-off events. For 167602/167606 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 36061 event pairs, 1135 based on Foata normal form. 3/5307 useless extension candidates. Maximal degree in co-relation 32109. Up to 4580 conditions per place. [2024-06-14 13:52:13,917 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 142 selfloop transitions, 110 changer transitions 0/258 dead transitions. [2024-06-14 13:52:13,918 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 258 transitions, 3686 flow [2024-06-14 13:52:13,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:52:13,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:52:13,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-14 13:52:13,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5823170731707317 [2024-06-14 13:52:13,919 INFO L175 Difference]: Start difference. First operand has 165 places, 223 transitions, 2790 flow. Second operand 8 states and 191 transitions. [2024-06-14 13:52:13,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 258 transitions, 3686 flow [2024-06-14 13:52:14,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 258 transitions, 3594 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-14 13:52:14,275 INFO L231 Difference]: Finished difference. Result has 168 places, 234 transitions, 3107 flow [2024-06-14 13:52:14,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2698, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3107, PETRI_PLACES=168, PETRI_TRANSITIONS=234} [2024-06-14 13:52:14,276 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 126 predicate places. [2024-06-14 13:52:14,276 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 234 transitions, 3107 flow [2024-06-14 13:52:14,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:14,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:14,276 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:14,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-14 13:52:14,276 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)] === [2024-06-14 13:52:14,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:14,277 INFO L85 PathProgramCache]: Analyzing trace with hash -417698609, now seen corresponding path program 2 times [2024-06-14 13:52:14,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:14,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439075891] [2024-06-14 13:52:14,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:14,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:14,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:14,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:14,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:14,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439075891] [2024-06-14 13:52:14,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439075891] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:14,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:14,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:14,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308756786] [2024-06-14 13:52:14,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:14,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:14,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:14,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:14,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:14,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:14,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 234 transitions, 3107 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:14,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:14,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:14,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:15,162 INFO L124 PetriNetUnfolderBase]: 3099/5334 cut-off events. [2024-06-14 13:52:15,162 INFO L125 PetriNetUnfolderBase]: For 183471/183475 co-relation queries the response was YES. [2024-06-14 13:52:15,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34022 conditions, 5334 events. 3099/5334 cut-off events. For 183471/183475 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 36301 event pairs, 1154 based on Foata normal form. 2/5331 useless extension candidates. Maximal degree in co-relation 33936. Up to 4473 conditions per place. [2024-06-14 13:52:15,217 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 134 selfloop transitions, 140 changer transitions 0/280 dead transitions. [2024-06-14 13:52:15,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 280 transitions, 4407 flow [2024-06-14 13:52:15,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:52:15,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:52:15,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-14 13:52:15,218 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5993031358885017 [2024-06-14 13:52:15,219 INFO L175 Difference]: Start difference. First operand has 168 places, 234 transitions, 3107 flow. Second operand 7 states and 172 transitions. [2024-06-14 13:52:15,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 280 transitions, 4407 flow [2024-06-14 13:52:15,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 280 transitions, 4229 flow, removed 55 selfloop flow, removed 3 redundant places. [2024-06-14 13:52:15,667 INFO L231 Difference]: Finished difference. Result has 174 places, 255 transitions, 3688 flow [2024-06-14 13:52:15,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2943, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3688, PETRI_PLACES=174, PETRI_TRANSITIONS=255} [2024-06-14 13:52:15,667 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 132 predicate places. [2024-06-14 13:52:15,667 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 255 transitions, 3688 flow [2024-06-14 13:52:15,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:15,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:15,668 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:15,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-14 13:52:15,668 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)] === [2024-06-14 13:52:15,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:15,668 INFO L85 PathProgramCache]: Analyzing trace with hash -406270769, now seen corresponding path program 3 times [2024-06-14 13:52:15,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:15,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623774182] [2024-06-14 13:52:15,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:15,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:15,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:15,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:15,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:15,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623774182] [2024-06-14 13:52:15,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623774182] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:15,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:15,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:15,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620083247] [2024-06-14 13:52:15,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:15,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:15,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:15,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:15,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:15,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:15,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 255 transitions, 3688 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:15,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:15,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:15,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:16,516 INFO L124 PetriNetUnfolderBase]: 3096/5331 cut-off events. [2024-06-14 13:52:16,517 INFO L125 PetriNetUnfolderBase]: For 193414/193418 co-relation queries the response was YES. [2024-06-14 13:52:16,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34859 conditions, 5331 events. 3096/5331 cut-off events. For 193414/193418 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 36325 event pairs, 1158 based on Foata normal form. 2/5328 useless extension candidates. Maximal degree in co-relation 34769. Up to 4472 conditions per place. [2024-06-14 13:52:16,569 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 131 selfloop transitions, 140 changer transitions 0/277 dead transitions. [2024-06-14 13:52:16,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 277 transitions, 4566 flow [2024-06-14 13:52:16,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:52:16,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:52:16,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-14 13:52:16,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-14 13:52:16,570 INFO L175 Difference]: Start difference. First operand has 174 places, 255 transitions, 3688 flow. Second operand 7 states and 168 transitions. [2024-06-14 13:52:16,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 277 transitions, 4566 flow [2024-06-14 13:52:17,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 277 transitions, 4440 flow, removed 63 selfloop flow, removed 0 redundant places. [2024-06-14 13:52:17,034 INFO L231 Difference]: Finished difference. Result has 181 places, 256 transitions, 3882 flow [2024-06-14 13:52:17,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3572, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3882, PETRI_PLACES=181, PETRI_TRANSITIONS=256} [2024-06-14 13:52:17,035 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 139 predicate places. [2024-06-14 13:52:17,035 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 256 transitions, 3882 flow [2024-06-14 13:52:17,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:17,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:17,036 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:17,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-14 13:52:17,036 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)] === [2024-06-14 13:52:17,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:17,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1614312481, now seen corresponding path program 4 times [2024-06-14 13:52:17,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:17,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123997785] [2024-06-14 13:52:17,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:17,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:17,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:17,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:17,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:17,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123997785] [2024-06-14 13:52:17,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123997785] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:17,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:17,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:17,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252716068] [2024-06-14 13:52:17,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:17,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:17,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:17,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:17,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:17,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:17,226 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 256 transitions, 3882 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:17,226 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:17,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:17,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:17,956 INFO L124 PetriNetUnfolderBase]: 3138/5399 cut-off events. [2024-06-14 13:52:17,956 INFO L125 PetriNetUnfolderBase]: For 206461/206465 co-relation queries the response was YES. [2024-06-14 13:52:17,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35910 conditions, 5399 events. 3138/5399 cut-off events. For 206461/206465 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 36790 event pairs, 1129 based on Foata normal form. 3/5399 useless extension candidates. Maximal degree in co-relation 35817. Up to 4804 conditions per place. [2024-06-14 13:52:18,009 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 224 selfloop transitions, 58 changer transitions 0/288 dead transitions. [2024-06-14 13:52:18,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 288 transitions, 4910 flow [2024-06-14 13:52:18,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:52:18,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:52:18,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-14 13:52:18,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487804878048781 [2024-06-14 13:52:18,010 INFO L175 Difference]: Start difference. First operand has 181 places, 256 transitions, 3882 flow. Second operand 8 states and 180 transitions. [2024-06-14 13:52:18,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 288 transitions, 4910 flow [2024-06-14 13:52:18,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 288 transitions, 4605 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-14 13:52:18,509 INFO L231 Difference]: Finished difference. Result has 187 places, 270 transitions, 4028 flow [2024-06-14 13:52:18,509 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3597, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4028, PETRI_PLACES=187, PETRI_TRANSITIONS=270} [2024-06-14 13:52:18,510 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 145 predicate places. [2024-06-14 13:52:18,510 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 270 transitions, 4028 flow [2024-06-14 13:52:18,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:18,510 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:18,510 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:18,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-14 13:52:18,510 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)] === [2024-06-14 13:52:18,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:18,511 INFO L85 PathProgramCache]: Analyzing trace with hash -290800853, now seen corresponding path program 1 times [2024-06-14 13:52:18,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:18,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004568851] [2024-06-14 13:52:18,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:18,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:18,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:18,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:18,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:18,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004568851] [2024-06-14 13:52:18,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004568851] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:18,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:18,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:18,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148464071] [2024-06-14 13:52:18,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:18,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:18,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:18,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:18,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:18,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:18,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 270 transitions, 4028 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:18,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:18,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:18,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:19,425 INFO L124 PetriNetUnfolderBase]: 3132/5386 cut-off events. [2024-06-14 13:52:19,425 INFO L125 PetriNetUnfolderBase]: For 213004/213008 co-relation queries the response was YES. [2024-06-14 13:52:19,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35828 conditions, 5386 events. 3132/5386 cut-off events. For 213004/213008 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 36596 event pairs, 1131 based on Foata normal form. 3/5386 useless extension candidates. Maximal degree in co-relation 35732. Up to 4799 conditions per place. [2024-06-14 13:52:19,477 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 224 selfloop transitions, 58 changer transitions 0/288 dead transitions. [2024-06-14 13:52:19,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 288 transitions, 4793 flow [2024-06-14 13:52:19,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:52:19,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:52:19,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-14 13:52:19,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487804878048781 [2024-06-14 13:52:19,479 INFO L175 Difference]: Start difference. First operand has 187 places, 270 transitions, 4028 flow. Second operand 8 states and 180 transitions. [2024-06-14 13:52:19,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 288 transitions, 4793 flow [2024-06-14 13:52:20,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 288 transitions, 4667 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-14 13:52:20,103 INFO L231 Difference]: Finished difference. Result has 191 places, 270 transitions, 4025 flow [2024-06-14 13:52:20,103 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3902, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4025, PETRI_PLACES=191, PETRI_TRANSITIONS=270} [2024-06-14 13:52:20,103 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 149 predicate places. [2024-06-14 13:52:20,104 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 270 transitions, 4025 flow [2024-06-14 13:52:20,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:20,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:20,104 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:20,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-14 13:52:20,104 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:20,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:20,105 INFO L85 PathProgramCache]: Analyzing trace with hash 1639199259, now seen corresponding path program 2 times [2024-06-14 13:52:20,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:20,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815117041] [2024-06-14 13:52:20,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:20,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:20,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:20,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:20,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:20,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815117041] [2024-06-14 13:52:20,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815117041] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:20,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:20,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:20,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698127700] [2024-06-14 13:52:20,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:20,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:20,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:20,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:20,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:20,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:20,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 270 transitions, 4025 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:20,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:20,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:20,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:21,028 INFO L124 PetriNetUnfolderBase]: 3132/5386 cut-off events. [2024-06-14 13:52:21,029 INFO L125 PetriNetUnfolderBase]: For 223096/223100 co-relation queries the response was YES. [2024-06-14 13:52:21,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36028 conditions, 5386 events. 3132/5386 cut-off events. For 223096/223100 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 36613 event pairs, 1130 based on Foata normal form. 3/5386 useless extension candidates. Maximal degree in co-relation 35931. Up to 4559 conditions per place. [2024-06-14 13:52:21,087 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 153 selfloop transitions, 139 changer transitions 0/298 dead transitions. [2024-06-14 13:52:21,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 298 transitions, 4987 flow [2024-06-14 13:52:21,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:52:21,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:52:21,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-14 13:52:21,089 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884146341463414 [2024-06-14 13:52:21,089 INFO L175 Difference]: Start difference. First operand has 191 places, 270 transitions, 4025 flow. Second operand 8 states and 193 transitions. [2024-06-14 13:52:21,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 298 transitions, 4987 flow [2024-06-14 13:52:21,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 298 transitions, 4847 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-14 13:52:21,687 INFO L231 Difference]: Finished difference. Result has 194 places, 274 transitions, 4295 flow [2024-06-14 13:52:21,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3885, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4295, PETRI_PLACES=194, PETRI_TRANSITIONS=274} [2024-06-14 13:52:21,688 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 152 predicate places. [2024-06-14 13:52:21,688 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 274 transitions, 4295 flow [2024-06-14 13:52:21,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:21,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:21,688 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:21,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-14 13:52:21,688 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:21,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:21,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1717661879, now seen corresponding path program 3 times [2024-06-14 13:52:21,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:21,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601594160] [2024-06-14 13:52:21,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:21,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:21,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:21,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:21,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:21,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601594160] [2024-06-14 13:52:21,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601594160] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:21,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:21,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:21,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297106440] [2024-06-14 13:52:21,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:21,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:21,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:21,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:21,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:21,864 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:21,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 274 transitions, 4295 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:21,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:21,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:21,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:22,579 INFO L124 PetriNetUnfolderBase]: 3137/5406 cut-off events. [2024-06-14 13:52:22,579 INFO L125 PetriNetUnfolderBase]: For 233838/233844 co-relation queries the response was YES. [2024-06-14 13:52:22,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36736 conditions, 5406 events. 3137/5406 cut-off events. For 233838/233844 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 36832 event pairs, 1151 based on Foata normal form. 4/5408 useless extension candidates. Maximal degree in co-relation 36637. Up to 4561 conditions per place. [2024-06-14 13:52:22,636 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 164 selfloop transitions, 124 changer transitions 0/294 dead transitions. [2024-06-14 13:52:22,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 294 transitions, 5210 flow [2024-06-14 13:52:22,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:52:22,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:52:22,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 162 transitions. [2024-06-14 13:52:22,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5644599303135889 [2024-06-14 13:52:22,637 INFO L175 Difference]: Start difference. First operand has 194 places, 274 transitions, 4295 flow. Second operand 7 states and 162 transitions. [2024-06-14 13:52:22,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 294 transitions, 5210 flow [2024-06-14 13:52:23,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 294 transitions, 5050 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-14 13:52:23,322 INFO L231 Difference]: Finished difference. Result has 197 places, 277 transitions, 4454 flow [2024-06-14 13:52:23,323 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4142, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4454, PETRI_PLACES=197, PETRI_TRANSITIONS=277} [2024-06-14 13:52:23,323 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 155 predicate places. [2024-06-14 13:52:23,323 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 277 transitions, 4454 flow [2024-06-14 13:52:23,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:23,324 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:23,324 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:23,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-14 13:52:23,324 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)] === [2024-06-14 13:52:23,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:23,325 INFO L85 PathProgramCache]: Analyzing trace with hash -1084870931, now seen corresponding path program 5 times [2024-06-14 13:52:23,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:23,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729374062] [2024-06-14 13:52:23,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:23,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:23,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:23,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:23,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:23,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729374062] [2024-06-14 13:52:23,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729374062] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:23,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:23,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:23,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923936951] [2024-06-14 13:52:23,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:23,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:23,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:23,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:23,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:23,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:23,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 277 transitions, 4454 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:23,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:23,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:23,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:24,238 INFO L124 PetriNetUnfolderBase]: 3131/5390 cut-off events. [2024-06-14 13:52:24,239 INFO L125 PetriNetUnfolderBase]: For 234663/234667 co-relation queries the response was YES. [2024-06-14 13:52:24,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36602 conditions, 5390 events. 3131/5390 cut-off events. For 234663/234667 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 36689 event pairs, 1127 based on Foata normal form. 3/5390 useless extension candidates. Maximal degree in co-relation 36503. Up to 4558 conditions per place. [2024-06-14 13:52:24,295 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 153 selfloop transitions, 145 changer transitions 0/304 dead transitions. [2024-06-14 13:52:24,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 304 transitions, 5356 flow [2024-06-14 13:52:24,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:52:24,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:52:24,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-14 13:52:24,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5975609756097561 [2024-06-14 13:52:24,297 INFO L175 Difference]: Start difference. First operand has 197 places, 277 transitions, 4454 flow. Second operand 8 states and 196 transitions. [2024-06-14 13:52:24,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 304 transitions, 5356 flow [2024-06-14 13:52:24,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 304 transitions, 5047 flow, removed 39 selfloop flow, removed 4 redundant places. [2024-06-14 13:52:24,981 INFO L231 Difference]: Finished difference. Result has 201 places, 277 transitions, 4451 flow [2024-06-14 13:52:24,981 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4145, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4451, PETRI_PLACES=201, PETRI_TRANSITIONS=277} [2024-06-14 13:52:24,981 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 159 predicate places. [2024-06-14 13:52:24,982 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 277 transitions, 4451 flow [2024-06-14 13:52:24,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:24,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:24,982 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:24,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-14 13:52:24,982 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)] === [2024-06-14 13:52:24,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:24,983 INFO L85 PathProgramCache]: Analyzing trace with hash -1717811609, now seen corresponding path program 4 times [2024-06-14 13:52:24,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:24,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952557265] [2024-06-14 13:52:24,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:24,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:24,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:25,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:25,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:25,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952557265] [2024-06-14 13:52:25,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952557265] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:25,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:25,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:25,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271273702] [2024-06-14 13:52:25,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:25,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:25,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:25,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:25,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:25,152 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:25,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 277 transitions, 4451 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:25,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:25,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:25,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:25,871 INFO L124 PetriNetUnfolderBase]: 3123/5381 cut-off events. [2024-06-14 13:52:25,872 INFO L125 PetriNetUnfolderBase]: For 243145/243151 co-relation queries the response was YES. [2024-06-14 13:52:25,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36728 conditions, 5381 events. 3123/5381 cut-off events. For 243145/243151 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 36675 event pairs, 1146 based on Foata normal form. 5/5384 useless extension candidates. Maximal degree in co-relation 36628. Up to 4553 conditions per place. [2024-06-14 13:52:25,932 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 166 selfloop transitions, 121 changer transitions 0/293 dead transitions. [2024-06-14 13:52:25,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 293 transitions, 5227 flow [2024-06-14 13:52:25,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:52:25,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:52:25,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-14 13:52:25,934 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5679442508710801 [2024-06-14 13:52:25,934 INFO L175 Difference]: Start difference. First operand has 201 places, 277 transitions, 4451 flow. Second operand 7 states and 163 transitions. [2024-06-14 13:52:25,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 293 transitions, 5227 flow [2024-06-14 13:52:26,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 293 transitions, 4847 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-14 13:52:26,618 INFO L231 Difference]: Finished difference. Result has 200 places, 277 transitions, 4325 flow [2024-06-14 13:52:26,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4075, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4325, PETRI_PLACES=200, PETRI_TRANSITIONS=277} [2024-06-14 13:52:26,619 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 158 predicate places. [2024-06-14 13:52:26,619 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 277 transitions, 4325 flow [2024-06-14 13:52:26,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:26,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:26,620 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:26,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-14 13:52:26,620 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)] === [2024-06-14 13:52:26,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:26,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1717802681, now seen corresponding path program 1 times [2024-06-14 13:52:26,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:26,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936589887] [2024-06-14 13:52:26,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:26,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:26,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:26,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:26,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:26,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936589887] [2024-06-14 13:52:26,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936589887] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:26,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:26,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:26,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416825078] [2024-06-14 13:52:26,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:26,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:26,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:26,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:26,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:26,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:26,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 277 transitions, 4325 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:26,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:26,824 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:26,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:27,532 INFO L124 PetriNetUnfolderBase]: 3131/5394 cut-off events. [2024-06-14 13:52:27,533 INFO L125 PetriNetUnfolderBase]: For 242522/242526 co-relation queries the response was YES. [2024-06-14 13:52:27,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36691 conditions, 5394 events. 3131/5394 cut-off events. For 242522/242526 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 36749 event pairs, 1115 based on Foata normal form. 6/5399 useless extension candidates. Maximal degree in co-relation 36590. Up to 4924 conditions per place. [2024-06-14 13:52:27,587 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 267 selfloop transitions, 18 changer transitions 0/291 dead transitions. [2024-06-14 13:52:27,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 291 transitions, 4976 flow [2024-06-14 13:52:27,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:52:27,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:52:27,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 128 transitions. [2024-06-14 13:52:27,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5203252032520326 [2024-06-14 13:52:27,588 INFO L175 Difference]: Start difference. First operand has 200 places, 277 transitions, 4325 flow. Second operand 6 states and 128 transitions. [2024-06-14 13:52:27,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 291 transitions, 4976 flow [2024-06-14 13:52:28,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 291 transitions, 4702 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-14 13:52:28,331 INFO L231 Difference]: Finished difference. Result has 199 places, 279 transitions, 4142 flow [2024-06-14 13:52:28,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4051, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4142, PETRI_PLACES=199, PETRI_TRANSITIONS=279} [2024-06-14 13:52:28,331 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 157 predicate places. [2024-06-14 13:52:28,331 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 279 transitions, 4142 flow [2024-06-14 13:52:28,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:28,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:28,332 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:28,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-14 13:52:28,332 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)] === [2024-06-14 13:52:28,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:28,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1703517881, now seen corresponding path program 2 times [2024-06-14 13:52:28,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:28,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915140044] [2024-06-14 13:52:28,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:28,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:28,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:28,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:28,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:28,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915140044] [2024-06-14 13:52:28,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915140044] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:28,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:28,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:28,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366447332] [2024-06-14 13:52:28,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:28,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:28,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:28,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:28,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:28,544 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:28,544 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 279 transitions, 4142 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:28,544 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:28,544 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:28,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:29,306 INFO L124 PetriNetUnfolderBase]: 3126/5377 cut-off events. [2024-06-14 13:52:29,307 INFO L125 PetriNetUnfolderBase]: For 249414/249418 co-relation queries the response was YES. [2024-06-14 13:52:29,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36472 conditions, 5377 events. 3126/5377 cut-off events. For 249414/249418 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 36496 event pairs, 1079 based on Foata normal form. 6/5382 useless extension candidates. Maximal degree in co-relation 36370. Up to 4897 conditions per place. [2024-06-14 13:52:29,362 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 266 selfloop transitions, 22 changer transitions 0/294 dead transitions. [2024-06-14 13:52:29,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 294 transitions, 4805 flow [2024-06-14 13:52:29,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:52:29,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:52:29,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 129 transitions. [2024-06-14 13:52:29,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.524390243902439 [2024-06-14 13:52:29,364 INFO L175 Difference]: Start difference. First operand has 199 places, 279 transitions, 4142 flow. Second operand 6 states and 129 transitions. [2024-06-14 13:52:29,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 294 transitions, 4805 flow [2024-06-14 13:52:30,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 294 transitions, 4730 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-14 13:52:30,023 INFO L231 Difference]: Finished difference. Result has 201 places, 281 transitions, 4170 flow [2024-06-14 13:52:30,024 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4067, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4170, PETRI_PLACES=201, PETRI_TRANSITIONS=281} [2024-06-14 13:52:30,024 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 159 predicate places. [2024-06-14 13:52:30,024 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 281 transitions, 4170 flow [2024-06-14 13:52:30,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:30,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:30,025 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:30,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-14 13:52:30,025 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)] === [2024-06-14 13:52:30,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:30,025 INFO L85 PathProgramCache]: Analyzing trace with hash -1225355597, now seen corresponding path program 1 times [2024-06-14 13:52:30,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:30,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068902616] [2024-06-14 13:52:30,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:30,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:30,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:30,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:30,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:30,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068902616] [2024-06-14 13:52:30,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068902616] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:30,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:30,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:30,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418897284] [2024-06-14 13:52:30,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:30,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:30,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:30,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:30,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:30,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:30,214 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 281 transitions, 4170 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:30,214 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:30,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:30,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:30,964 INFO L124 PetriNetUnfolderBase]: 3134/5400 cut-off events. [2024-06-14 13:52:30,964 INFO L125 PetriNetUnfolderBase]: For 259058/259058 co-relation queries the response was YES. [2024-06-14 13:52:31,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36861 conditions, 5400 events. 3134/5400 cut-off events. For 259058/259058 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 36708 event pairs, 1072 based on Foata normal form. 2/5401 useless extension candidates. Maximal degree in co-relation 36758. Up to 4823 conditions per place. [2024-06-14 13:52:31,022 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 261 selfloop transitions, 48 changer transitions 0/315 dead transitions. [2024-06-14 13:52:31,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 315 transitions, 5116 flow [2024-06-14 13:52:31,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:52:31,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:52:31,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-14 13:52:31,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5679442508710801 [2024-06-14 13:52:31,024 INFO L175 Difference]: Start difference. First operand has 201 places, 281 transitions, 4170 flow. Second operand 7 states and 163 transitions. [2024-06-14 13:52:31,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 315 transitions, 5116 flow [2024-06-14 13:52:31,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 315 transitions, 5027 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-14 13:52:31,640 INFO L231 Difference]: Finished difference. Result has 205 places, 286 transitions, 4312 flow [2024-06-14 13:52:31,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4083, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4312, PETRI_PLACES=205, PETRI_TRANSITIONS=286} [2024-06-14 13:52:31,641 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 163 predicate places. [2024-06-14 13:52:31,641 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 286 transitions, 4312 flow [2024-06-14 13:52:31,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:31,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:31,641 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:31,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-14 13:52:31,641 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:31,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:31,642 INFO L85 PathProgramCache]: Analyzing trace with hash 1499030239, now seen corresponding path program 2 times [2024-06-14 13:52:31,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:31,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080875708] [2024-06-14 13:52:31,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:31,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:31,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:31,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:31,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:31,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080875708] [2024-06-14 13:52:31,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080875708] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:31,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:31,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:31,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502010892] [2024-06-14 13:52:31,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:31,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:31,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:31,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:31,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:31,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:31,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 286 transitions, 4312 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:31,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:31,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:31,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:32,587 INFO L124 PetriNetUnfolderBase]: 3129/5400 cut-off events. [2024-06-14 13:52:32,587 INFO L125 PetriNetUnfolderBase]: For 268562/268562 co-relation queries the response was YES. [2024-06-14 13:52:32,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37110 conditions, 5400 events. 3129/5400 cut-off events. For 268562/268562 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 36837 event pairs, 1108 based on Foata normal form. 2/5401 useless extension candidates. Maximal degree in co-relation 37005. Up to 4889 conditions per place. [2024-06-14 13:52:32,649 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 258 selfloop transitions, 43 changer transitions 0/307 dead transitions. [2024-06-14 13:52:32,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 307 transitions, 5006 flow [2024-06-14 13:52:32,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:52:32,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:52:32,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 155 transitions. [2024-06-14 13:52:32,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5400696864111498 [2024-06-14 13:52:32,650 INFO L175 Difference]: Start difference. First operand has 205 places, 286 transitions, 4312 flow. Second operand 7 states and 155 transitions. [2024-06-14 13:52:32,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 307 transitions, 5006 flow [2024-06-14 13:52:33,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 307 transitions, 4864 flow, removed 45 selfloop flow, removed 3 redundant places. [2024-06-14 13:52:33,333 INFO L231 Difference]: Finished difference. Result has 209 places, 286 transitions, 4261 flow [2024-06-14 13:52:33,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4170, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4261, PETRI_PLACES=209, PETRI_TRANSITIONS=286} [2024-06-14 13:52:33,334 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 167 predicate places. [2024-06-14 13:52:33,334 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 286 transitions, 4261 flow [2024-06-14 13:52:33,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:33,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:33,334 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:33,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-14 13:52:33,334 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:33,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:33,335 INFO L85 PathProgramCache]: Analyzing trace with hash 1614506107, now seen corresponding path program 1 times [2024-06-14 13:52:33,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:33,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203981234] [2024-06-14 13:52:33,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:33,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:33,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:33,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:33,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:33,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203981234] [2024-06-14 13:52:33,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203981234] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:33,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:33,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:33,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775519571] [2024-06-14 13:52:33,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:33,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:33,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:33,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:33,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:33,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:33,544 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 286 transitions, 4261 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:33,544 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:33,544 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:33,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:34,459 INFO L124 PetriNetUnfolderBase]: 3305/5666 cut-off events. [2024-06-14 13:52:34,459 INFO L125 PetriNetUnfolderBase]: For 335714/335718 co-relation queries the response was YES. [2024-06-14 13:52:34,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38590 conditions, 5666 events. 3305/5666 cut-off events. For 335714/335718 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 38820 event pairs, 1154 based on Foata normal form. 55/5716 useless extension candidates. Maximal degree in co-relation 38483. Up to 4859 conditions per place. [2024-06-14 13:52:34,512 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 255 selfloop transitions, 47 changer transitions 3/311 dead transitions. [2024-06-14 13:52:34,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 311 transitions, 5002 flow [2024-06-14 13:52:34,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:52:34,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:52:34,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-14 13:52:34,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5579268292682927 [2024-06-14 13:52:34,513 INFO L175 Difference]: Start difference. First operand has 209 places, 286 transitions, 4261 flow. Second operand 8 states and 183 transitions. [2024-06-14 13:52:34,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 311 transitions, 5002 flow [2024-06-14 13:52:35,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 311 transitions, 4909 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-14 13:52:35,210 INFO L231 Difference]: Finished difference. Result has 212 places, 288 transitions, 4298 flow [2024-06-14 13:52:35,211 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4170, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4298, PETRI_PLACES=212, PETRI_TRANSITIONS=288} [2024-06-14 13:52:35,211 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 170 predicate places. [2024-06-14 13:52:35,212 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 288 transitions, 4298 flow [2024-06-14 13:52:35,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:35,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:35,212 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:35,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-14 13:52:35,212 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:35,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:35,213 INFO L85 PathProgramCache]: Analyzing trace with hash -1712082809, now seen corresponding path program 2 times [2024-06-14 13:52:35,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:35,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323411761] [2024-06-14 13:52:35,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:35,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:35,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:35,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:35,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:35,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323411761] [2024-06-14 13:52:35,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323411761] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:35,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:35,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:35,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544996459] [2024-06-14 13:52:35,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:35,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:35,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:35,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:35,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:35,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:35,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 288 transitions, 4298 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:35,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:35,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:35,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:36,315 INFO L124 PetriNetUnfolderBase]: 3329/5731 cut-off events. [2024-06-14 13:52:36,315 INFO L125 PetriNetUnfolderBase]: For 306009/306015 co-relation queries the response was YES. [2024-06-14 13:52:36,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39306 conditions, 5731 events. 3329/5731 cut-off events. For 306009/306015 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 39571 event pairs, 1196 based on Foata normal form. 15/5744 useless extension candidates. Maximal degree in co-relation 39198. Up to 4969 conditions per place. [2024-06-14 13:52:36,379 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 215 selfloop transitions, 82 changer transitions 6/309 dead transitions. [2024-06-14 13:52:36,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 309 transitions, 5011 flow [2024-06-14 13:52:36,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:52:36,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:52:36,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-14 13:52:36,380 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5679442508710801 [2024-06-14 13:52:36,380 INFO L175 Difference]: Start difference. First operand has 212 places, 288 transitions, 4298 flow. Second operand 7 states and 163 transitions. [2024-06-14 13:52:36,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 309 transitions, 5011 flow [2024-06-14 13:52:37,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 309 transitions, 4902 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-14 13:52:37,113 INFO L231 Difference]: Finished difference. Result has 213 places, 288 transitions, 4368 flow [2024-06-14 13:52:37,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4189, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4368, PETRI_PLACES=213, PETRI_TRANSITIONS=288} [2024-06-14 13:52:37,114 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 171 predicate places. [2024-06-14 13:52:37,114 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 288 transitions, 4368 flow [2024-06-14 13:52:37,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:37,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:37,114 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:37,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-14 13:52:37,115 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:37,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:37,115 INFO L85 PathProgramCache]: Analyzing trace with hash -1703511929, now seen corresponding path program 3 times [2024-06-14 13:52:37,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:37,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10546465] [2024-06-14 13:52:37,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:37,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:37,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:37,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:37,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:37,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10546465] [2024-06-14 13:52:37,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10546465] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:37,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:37,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:37,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193093842] [2024-06-14 13:52:37,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:37,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:37,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:37,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:37,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:37,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:37,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 288 transitions, 4368 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:37,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:37,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:37,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:38,265 INFO L124 PetriNetUnfolderBase]: 3802/6489 cut-off events. [2024-06-14 13:52:38,265 INFO L125 PetriNetUnfolderBase]: For 427118/427124 co-relation queries the response was YES. [2024-06-14 13:52:38,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47022 conditions, 6489 events. 3802/6489 cut-off events. For 427118/427124 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 45359 event pairs, 1332 based on Foata normal form. 15/6499 useless extension candidates. Maximal degree in co-relation 46913. Up to 4425 conditions per place. [2024-06-14 13:52:38,342 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 223 selfloop transitions, 91 changer transitions 0/320 dead transitions. [2024-06-14 13:52:38,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 320 transitions, 5301 flow [2024-06-14 13:52:38,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:52:38,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:52:38,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-14 13:52:38,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5888501742160279 [2024-06-14 13:52:38,343 INFO L175 Difference]: Start difference. First operand has 213 places, 288 transitions, 4368 flow. Second operand 7 states and 169 transitions. [2024-06-14 13:52:38,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 320 transitions, 5301 flow [2024-06-14 13:52:39,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 320 transitions, 5112 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-14 13:52:39,409 INFO L231 Difference]: Finished difference. Result has 216 places, 294 transitions, 4501 flow [2024-06-14 13:52:39,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4179, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4501, PETRI_PLACES=216, PETRI_TRANSITIONS=294} [2024-06-14 13:52:39,410 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 174 predicate places. [2024-06-14 13:52:39,410 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 294 transitions, 4501 flow [2024-06-14 13:52:39,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:39,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:39,410 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:39,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-14 13:52:39,410 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:39,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:39,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1939983959, now seen corresponding path program 4 times [2024-06-14 13:52:39,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:39,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374749967] [2024-06-14 13:52:39,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:39,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:39,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:39,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:39,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:39,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374749967] [2024-06-14 13:52:39,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374749967] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:39,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:39,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:39,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301668367] [2024-06-14 13:52:39,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:39,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:39,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:39,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:39,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:39,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:39,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 294 transitions, 4501 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:39,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:39,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:39,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:40,547 INFO L124 PetriNetUnfolderBase]: 3666/6265 cut-off events. [2024-06-14 13:52:40,547 INFO L125 PetriNetUnfolderBase]: For 432791/432795 co-relation queries the response was YES. [2024-06-14 13:52:40,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44295 conditions, 6265 events. 3666/6265 cut-off events. For 432791/432795 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 43694 event pairs, 1377 based on Foata normal form. 55/6317 useless extension candidates. Maximal degree in co-relation 44184. Up to 5113 conditions per place. [2024-06-14 13:52:40,619 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 218 selfloop transitions, 95 changer transitions 3/322 dead transitions. [2024-06-14 13:52:40,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 322 transitions, 5248 flow [2024-06-14 13:52:40,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:52:40,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:52:40,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-14 13:52:40,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5914634146341463 [2024-06-14 13:52:40,621 INFO L175 Difference]: Start difference. First operand has 216 places, 294 transitions, 4501 flow. Second operand 8 states and 194 transitions. [2024-06-14 13:52:40,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 322 transitions, 5248 flow [2024-06-14 13:52:41,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 322 transitions, 5007 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-14 13:52:41,719 INFO L231 Difference]: Finished difference. Result has 219 places, 294 transitions, 4468 flow [2024-06-14 13:52:41,719 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4260, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4468, PETRI_PLACES=219, PETRI_TRANSITIONS=294} [2024-06-14 13:52:41,720 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 177 predicate places. [2024-06-14 13:52:41,720 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 294 transitions, 4468 flow [2024-06-14 13:52:41,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:41,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:41,720 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:41,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-14 13:52:41,721 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:41,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:41,721 INFO L85 PathProgramCache]: Analyzing trace with hash -812610033, now seen corresponding path program 1 times [2024-06-14 13:52:41,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:41,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695099624] [2024-06-14 13:52:41,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:41,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:41,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:41,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:41,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:41,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695099624] [2024-06-14 13:52:41,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695099624] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:41,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:41,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:52:41,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114408565] [2024-06-14 13:52:41,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:41,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:52:41,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:41,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:52:41,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:52:41,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:41,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 294 transitions, 4468 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:41,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:41,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:41,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:42,989 INFO L124 PetriNetUnfolderBase]: 3863/6679 cut-off events. [2024-06-14 13:52:42,990 INFO L125 PetriNetUnfolderBase]: For 448981/448987 co-relation queries the response was YES. [2024-06-14 13:52:43,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47183 conditions, 6679 events. 3863/6679 cut-off events. For 448981/448987 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 47705 event pairs, 1194 based on Foata normal form. 36/6714 useless extension candidates. Maximal degree in co-relation 47071. Up to 5622 conditions per place. [2024-06-14 13:52:43,064 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 293 selfloop transitions, 34 changer transitions 0/333 dead transitions. [2024-06-14 13:52:43,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 333 transitions, 5432 flow [2024-06-14 13:52:43,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:52:43,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:52:43,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-14 13:52:43,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5640243902439024 [2024-06-14 13:52:43,066 INFO L175 Difference]: Start difference. First operand has 219 places, 294 transitions, 4468 flow. Second operand 8 states and 185 transitions. [2024-06-14 13:52:43,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 333 transitions, 5432 flow [2024-06-14 13:52:44,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 333 transitions, 5230 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-14 13:52:44,140 INFO L231 Difference]: Finished difference. Result has 222 places, 298 transitions, 4434 flow [2024-06-14 13:52:44,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4266, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4434, PETRI_PLACES=222, PETRI_TRANSITIONS=298} [2024-06-14 13:52:44,140 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 180 predicate places. [2024-06-14 13:52:44,140 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 298 transitions, 4434 flow [2024-06-14 13:52:44,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:44,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:44,141 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:44,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-14 13:52:44,142 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:44,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:44,142 INFO L85 PathProgramCache]: Analyzing trace with hash 682526607, now seen corresponding path program 2 times [2024-06-14 13:52:44,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:44,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452842265] [2024-06-14 13:52:44,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:44,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:44,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:44,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:44,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:44,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452842265] [2024-06-14 13:52:44,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452842265] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:44,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:44,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:52:44,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548619465] [2024-06-14 13:52:44,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:44,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:52:44,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:44,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:52:44,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:52:44,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:44,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 298 transitions, 4434 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:44,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:44,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:44,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:45,519 INFO L124 PetriNetUnfolderBase]: 4370/7568 cut-off events. [2024-06-14 13:52:45,519 INFO L125 PetriNetUnfolderBase]: For 531411/531417 co-relation queries the response was YES. [2024-06-14 13:52:45,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52918 conditions, 7568 events. 4370/7568 cut-off events. For 531411/531417 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 55691 event pairs, 1732 based on Foata normal form. 42/7609 useless extension candidates. Maximal degree in co-relation 52804. Up to 6105 conditions per place. [2024-06-14 13:52:45,602 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 298 selfloop transitions, 36 changer transitions 9/349 dead transitions. [2024-06-14 13:52:45,603 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 349 transitions, 5652 flow [2024-06-14 13:52:45,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:52:45,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:52:45,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-14 13:52:45,604 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5640243902439024 [2024-06-14 13:52:45,604 INFO L175 Difference]: Start difference. First operand has 222 places, 298 transitions, 4434 flow. Second operand 8 states and 185 transitions. [2024-06-14 13:52:45,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 349 transitions, 5652 flow [2024-06-14 13:52:46,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 349 transitions, 5517 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-06-14 13:52:47,002 INFO L231 Difference]: Finished difference. Result has 229 places, 310 transitions, 4624 flow [2024-06-14 13:52:47,002 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4313, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4624, PETRI_PLACES=229, PETRI_TRANSITIONS=310} [2024-06-14 13:52:47,002 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 187 predicate places. [2024-06-14 13:52:47,002 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 310 transitions, 4624 flow [2024-06-14 13:52:47,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:47,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:47,003 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:47,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-14 13:52:47,003 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:47,003 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:47,003 INFO L85 PathProgramCache]: Analyzing trace with hash 682853037, now seen corresponding path program 3 times [2024-06-14 13:52:47,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:47,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914412957] [2024-06-14 13:52:47,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:47,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:47,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:47,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:47,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:47,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914412957] [2024-06-14 13:52:47,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914412957] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:47,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:47,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:52:47,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103670985] [2024-06-14 13:52:47,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:47,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:52:47,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:47,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:52:47,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:52:47,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:47,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 310 transitions, 4624 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:47,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:47,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:47,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:48,297 INFO L124 PetriNetUnfolderBase]: 4137/7169 cut-off events. [2024-06-14 13:52:48,297 INFO L125 PetriNetUnfolderBase]: For 501563/501571 co-relation queries the response was YES. [2024-06-14 13:52:48,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49462 conditions, 7169 events. 4137/7169 cut-off events. For 501563/501571 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 52300 event pairs, 1653 based on Foata normal form. 50/7216 useless extension candidates. Maximal degree in co-relation 49344. Up to 6313 conditions per place. [2024-06-14 13:52:48,380 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 286 selfloop transitions, 27 changer transitions 17/336 dead transitions. [2024-06-14 13:52:48,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 336 transitions, 5390 flow [2024-06-14 13:52:48,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:52:48,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:52:48,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 175 transitions. [2024-06-14 13:52:48,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5335365853658537 [2024-06-14 13:52:48,381 INFO L175 Difference]: Start difference. First operand has 229 places, 310 transitions, 4624 flow. Second operand 8 states and 175 transitions. [2024-06-14 13:52:48,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 336 transitions, 5390 flow [2024-06-14 13:52:49,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 336 transitions, 5312 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-14 13:52:49,702 INFO L231 Difference]: Finished difference. Result has 235 places, 304 transitions, 4481 flow [2024-06-14 13:52:49,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4546, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4481, PETRI_PLACES=235, PETRI_TRANSITIONS=304} [2024-06-14 13:52:49,702 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 193 predicate places. [2024-06-14 13:52:49,703 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 304 transitions, 4481 flow [2024-06-14 13:52:49,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:49,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:49,703 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] [2024-06-14 13:52:49,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-14 13:52:49,703 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:49,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:49,704 INFO L85 PathProgramCache]: Analyzing trace with hash 845494573, now seen corresponding path program 4 times [2024-06-14 13:52:49,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:49,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158324201] [2024-06-14 13:52:49,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:49,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:49,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:49,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:49,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:49,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158324201] [2024-06-14 13:52:49,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158324201] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:49,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:49,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:52:49,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327336307] [2024-06-14 13:52:49,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:49,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:52:49,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:49,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:52:49,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:52:49,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:49,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 304 transitions, 4481 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:49,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:49,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:49,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:51,019 INFO L124 PetriNetUnfolderBase]: 4051/7015 cut-off events. [2024-06-14 13:52:51,020 INFO L125 PetriNetUnfolderBase]: For 518333/518341 co-relation queries the response was YES. [2024-06-14 13:52:51,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48987 conditions, 7015 events. 4051/7015 cut-off events. For 518333/518341 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 50841 event pairs, 1617 based on Foata normal form. 50/7064 useless extension candidates. Maximal degree in co-relation 48869. Up to 6030 conditions per place. [2024-06-14 13:52:51,109 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 237 selfloop transitions, 77 changer transitions 16/336 dead transitions. [2024-06-14 13:52:51,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 336 transitions, 5274 flow [2024-06-14 13:52:51,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:52:51,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:52:51,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-14 13:52:51,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5792682926829268 [2024-06-14 13:52:51,110 INFO L175 Difference]: Start difference. First operand has 235 places, 304 transitions, 4481 flow. Second operand 8 states and 190 transitions. [2024-06-14 13:52:51,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 336 transitions, 5274 flow [2024-06-14 13:52:52,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 336 transitions, 5198 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-14 13:52:52,400 INFO L231 Difference]: Finished difference. Result has 232 places, 298 transitions, 4468 flow [2024-06-14 13:52:52,400 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4409, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4468, PETRI_PLACES=232, PETRI_TRANSITIONS=298} [2024-06-14 13:52:52,400 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 190 predicate places. [2024-06-14 13:52:52,400 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 298 transitions, 4468 flow [2024-06-14 13:52:52,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:52,401 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:52,401 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:52,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-14 13:52:52,401 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:52,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:52,401 INFO L85 PathProgramCache]: Analyzing trace with hash 845168143, now seen corresponding path program 5 times [2024-06-14 13:52:52,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:52,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727836061] [2024-06-14 13:52:52,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:52,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:52,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:52,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:52,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:52,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727836061] [2024-06-14 13:52:52,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727836061] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:52,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:52,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:52:52,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823461182] [2024-06-14 13:52:52,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:52,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:52:52,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:52,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:52:52,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:52:52,617 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:52,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 298 transitions, 4468 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:52,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:52,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:52,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:53,628 INFO L124 PetriNetUnfolderBase]: 3828/6660 cut-off events. [2024-06-14 13:52:53,629 INFO L125 PetriNetUnfolderBase]: For 460319/460327 co-relation queries the response was YES. [2024-06-14 13:52:53,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45631 conditions, 6660 events. 3828/6660 cut-off events. For 460319/460327 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 47858 event pairs, 1221 based on Foata normal form. 44/6703 useless extension candidates. Maximal degree in co-relation 45513. Up to 4688 conditions per place. [2024-06-14 13:52:53,702 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 237 selfloop transitions, 79 changer transitions 16/338 dead transitions. [2024-06-14 13:52:53,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 338 transitions, 5386 flow [2024-06-14 13:52:53,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:52:53,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:52:53,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-14 13:52:53,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6067073170731707 [2024-06-14 13:52:53,704 INFO L175 Difference]: Start difference. First operand has 232 places, 298 transitions, 4468 flow. Second operand 8 states and 199 transitions. [2024-06-14 13:52:53,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 338 transitions, 5386 flow [2024-06-14 13:52:54,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 338 transitions, 5220 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-14 13:52:54,728 INFO L231 Difference]: Finished difference. Result has 230 places, 285 transitions, 4265 flow [2024-06-14 13:52:54,729 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4306, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4265, PETRI_PLACES=230, PETRI_TRANSITIONS=285} [2024-06-14 13:52:54,729 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 188 predicate places. [2024-06-14 13:52:54,729 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 285 transitions, 4265 flow [2024-06-14 13:52:54,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:54,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:54,730 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:54,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-14 13:52:54,730 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:54,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:54,732 INFO L85 PathProgramCache]: Analyzing trace with hash -193139715, now seen corresponding path program 1 times [2024-06-14 13:52:54,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:54,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519856025] [2024-06-14 13:52:54,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:54,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:54,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:54,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:54,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:54,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519856025] [2024-06-14 13:52:54,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519856025] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:54,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:54,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:54,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441757659] [2024-06-14 13:52:54,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:54,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:54,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:54,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:54,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:54,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:54,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 285 transitions, 4265 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:54,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:54,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:54,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:55,798 INFO L124 PetriNetUnfolderBase]: 3652/6342 cut-off events. [2024-06-14 13:52:55,798 INFO L125 PetriNetUnfolderBase]: For 399726/399732 co-relation queries the response was YES. [2024-06-14 13:52:55,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44329 conditions, 6342 events. 3652/6342 cut-off events. For 399726/399732 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 45240 event pairs, 1472 based on Foata normal form. 4/6344 useless extension candidates. Maximal degree in co-relation 44212. Up to 5574 conditions per place. [2024-06-14 13:52:55,872 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 220 selfloop transitions, 88 changer transitions 0/314 dead transitions. [2024-06-14 13:52:55,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 314 transitions, 5439 flow [2024-06-14 13:52:55,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:52:55,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:52:55,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-14 13:52:55,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-14 13:52:55,874 INFO L175 Difference]: Start difference. First operand has 230 places, 285 transitions, 4265 flow. Second operand 7 states and 164 transitions. [2024-06-14 13:52:55,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 314 transitions, 5439 flow [2024-06-14 13:52:57,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 314 transitions, 5262 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-14 13:52:57,036 INFO L231 Difference]: Finished difference. Result has 230 places, 294 transitions, 4482 flow [2024-06-14 13:52:57,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4094, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4482, PETRI_PLACES=230, PETRI_TRANSITIONS=294} [2024-06-14 13:52:57,037 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 188 predicate places. [2024-06-14 13:52:57,037 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 294 transitions, 4482 flow [2024-06-14 13:52:57,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:57,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:57,037 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:57,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-14 13:52:57,038 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:57,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:57,038 INFO L85 PathProgramCache]: Analyzing trace with hash -192840813, now seen corresponding path program 1 times [2024-06-14 13:52:57,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:57,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484673271] [2024-06-14 13:52:57,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:57,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:57,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:57,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:57,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:57,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484673271] [2024-06-14 13:52:57,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484673271] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:57,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:57,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:52:57,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429863305] [2024-06-14 13:52:57,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:57,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:52:57,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:57,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:52:57,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:52:57,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:57,249 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 294 transitions, 4482 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:57,249 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:57,249 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:57,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:58,188 INFO L124 PetriNetUnfolderBase]: 3646/6329 cut-off events. [2024-06-14 13:52:58,189 INFO L125 PetriNetUnfolderBase]: For 397568/397572 co-relation queries the response was YES. [2024-06-14 13:52:58,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44065 conditions, 6329 events. 3646/6329 cut-off events. For 397568/397572 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 45060 event pairs, 1457 based on Foata normal form. 3/6329 useless extension candidates. Maximal degree in co-relation 43948. Up to 5569 conditions per place. [2024-06-14 13:52:58,262 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 211 selfloop transitions, 100 changer transitions 0/317 dead transitions. [2024-06-14 13:52:58,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 317 transitions, 5262 flow [2024-06-14 13:52:58,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:52:58,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:52:58,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 208 transitions. [2024-06-14 13:52:58,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5636856368563685 [2024-06-14 13:52:58,264 INFO L175 Difference]: Start difference. First operand has 230 places, 294 transitions, 4482 flow. Second operand 9 states and 208 transitions. [2024-06-14 13:52:58,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 317 transitions, 5262 flow [2024-06-14 13:52:59,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 317 transitions, 5143 flow, removed 51 selfloop flow, removed 1 redundant places. [2024-06-14 13:52:59,454 INFO L231 Difference]: Finished difference. Result has 238 places, 294 transitions, 4574 flow [2024-06-14 13:52:59,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4363, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4574, PETRI_PLACES=238, PETRI_TRANSITIONS=294} [2024-06-14 13:52:59,455 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 196 predicate places. [2024-06-14 13:52:59,455 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 294 transitions, 4574 flow [2024-06-14 13:52:59,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:59,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:59,455 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:59,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-14 13:52:59,455 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:59,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:59,456 INFO L85 PathProgramCache]: Analyzing trace with hash -203844095, now seen corresponding path program 2 times [2024-06-14 13:52:59,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:59,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481069666] [2024-06-14 13:52:59,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:59,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:59,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:59,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:59,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:59,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481069666] [2024-06-14 13:52:59,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481069666] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:59,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:59,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:59,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024517927] [2024-06-14 13:52:59,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:59,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:59,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:59,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:59,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:59,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:59,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 294 transitions, 4574 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:59,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:59,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:59,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:00,604 INFO L124 PetriNetUnfolderBase]: 3643/6335 cut-off events. [2024-06-14 13:53:00,605 INFO L125 PetriNetUnfolderBase]: For 410750/410758 co-relation queries the response was YES. [2024-06-14 13:53:00,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44514 conditions, 6335 events. 3643/6335 cut-off events. For 410750/410758 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 45291 event pairs, 1460 based on Foata normal form. 9/6343 useless extension candidates. Maximal degree in co-relation 44395. Up to 5567 conditions per place. [2024-06-14 13:53:00,673 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 229 selfloop transitions, 87 changer transitions 0/322 dead transitions. [2024-06-14 13:53:00,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 322 transitions, 5380 flow [2024-06-14 13:53:00,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:53:00,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:53:00,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-14 13:53:00,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.573170731707317 [2024-06-14 13:53:00,675 INFO L175 Difference]: Start difference. First operand has 238 places, 294 transitions, 4574 flow. Second operand 8 states and 188 transitions. [2024-06-14 13:53:00,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 322 transitions, 5380 flow [2024-06-14 13:53:01,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 322 transitions, 5115 flow, removed 17 selfloop flow, removed 9 redundant places. [2024-06-14 13:53:01,750 INFO L231 Difference]: Finished difference. Result has 237 places, 294 transitions, 4491 flow [2024-06-14 13:53:01,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4311, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4491, PETRI_PLACES=237, PETRI_TRANSITIONS=294} [2024-06-14 13:53:01,750 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 195 predicate places. [2024-06-14 13:53:01,751 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 294 transitions, 4491 flow [2024-06-14 13:53:01,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:01,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:01,751 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:01,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-14 13:53:01,751 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:01,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:01,752 INFO L85 PathProgramCache]: Analyzing trace with hash -192841185, now seen corresponding path program 3 times [2024-06-14 13:53:01,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:01,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326004111] [2024-06-14 13:53:01,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:01,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:01,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:01,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:01,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:01,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326004111] [2024-06-14 13:53:01,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326004111] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:01,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:01,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:53:01,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477393444] [2024-06-14 13:53:01,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:01,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:53:01,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:01,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:53:01,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:53:01,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:01,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 294 transitions, 4491 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:01,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:01,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:01,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:02,834 INFO L124 PetriNetUnfolderBase]: 3640/6326 cut-off events. [2024-06-14 13:53:02,835 INFO L125 PetriNetUnfolderBase]: For 408774/408780 co-relation queries the response was YES. [2024-06-14 13:53:02,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44325 conditions, 6326 events. 3640/6326 cut-off events. For 408774/408780 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 45113 event pairs, 1474 based on Foata normal form. 4/6328 useless extension candidates. Maximal degree in co-relation 44206. Up to 5565 conditions per place. [2024-06-14 13:53:02,905 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 213 selfloop transitions, 90 changer transitions 0/309 dead transitions. [2024-06-14 13:53:02,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 309 transitions, 5237 flow [2024-06-14 13:53:02,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:53:02,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:53:02,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 160 transitions. [2024-06-14 13:53:02,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5574912891986062 [2024-06-14 13:53:02,906 INFO L175 Difference]: Start difference. First operand has 237 places, 294 transitions, 4491 flow. Second operand 7 states and 160 transitions. [2024-06-14 13:53:02,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 309 transitions, 5237 flow [2024-06-14 13:53:04,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 309 transitions, 4965 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-14 13:53:04,108 INFO L231 Difference]: Finished difference. Result has 237 places, 294 transitions, 4405 flow [2024-06-14 13:53:04,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4219, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4405, PETRI_PLACES=237, PETRI_TRANSITIONS=294} [2024-06-14 13:53:04,109 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 195 predicate places. [2024-06-14 13:53:04,109 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 294 transitions, 4405 flow [2024-06-14 13:53:04,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:04,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:04,109 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:04,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-14 13:53:04,109 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:04,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:04,110 INFO L85 PathProgramCache]: Analyzing trace with hash 856219333, now seen corresponding path program 6 times [2024-06-14 13:53:04,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:04,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361082106] [2024-06-14 13:53:04,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:04,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:04,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:04,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:04,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:04,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361082106] [2024-06-14 13:53:04,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361082106] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:04,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:04,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:04,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234138638] [2024-06-14 13:53:04,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:04,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:04,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:04,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:04,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:04,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:04,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 294 transitions, 4405 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:04,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:04,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:04,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:05,277 INFO L124 PetriNetUnfolderBase]: 3528/6126 cut-off events. [2024-06-14 13:53:05,277 INFO L125 PetriNetUnfolderBase]: For 419745/419751 co-relation queries the response was YES. [2024-06-14 13:53:05,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41539 conditions, 6126 events. 3528/6126 cut-off events. For 419745/419751 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 43324 event pairs, 1368 based on Foata normal form. 45/6167 useless extension candidates. Maximal degree in co-relation 41419. Up to 5224 conditions per place. [2024-06-14 13:53:05,347 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 229 selfloop transitions, 62 changer transitions 17/314 dead transitions. [2024-06-14 13:53:05,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 314 transitions, 5095 flow [2024-06-14 13:53:05,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:53:05,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:53:05,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-14 13:53:05,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-14 13:53:05,349 INFO L175 Difference]: Start difference. First operand has 237 places, 294 transitions, 4405 flow. Second operand 7 states and 161 transitions. [2024-06-14 13:53:05,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 314 transitions, 5095 flow [2024-06-14 13:53:06,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 314 transitions, 4897 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-14 13:53:06,461 INFO L231 Difference]: Finished difference. Result has 238 places, 285 transitions, 4175 flow [2024-06-14 13:53:06,462 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4207, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4175, PETRI_PLACES=238, PETRI_TRANSITIONS=285} [2024-06-14 13:53:06,462 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 196 predicate places. [2024-06-14 13:53:06,462 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 285 transitions, 4175 flow [2024-06-14 13:53:06,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:06,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:06,463 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] [2024-06-14 13:53:06,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-14 13:53:06,463 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:06,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:06,463 INFO L85 PathProgramCache]: Analyzing trace with hash 856619047, now seen corresponding path program 1 times [2024-06-14 13:53:06,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:06,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843426075] [2024-06-14 13:53:06,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:06,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:06,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:06,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:06,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:06,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843426075] [2024-06-14 13:53:06,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843426075] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:06,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:06,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:06,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383407722] [2024-06-14 13:53:06,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:06,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:06,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:06,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:06,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:06,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:06,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 285 transitions, 4175 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:06,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:06,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:06,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:07,509 INFO L124 PetriNetUnfolderBase]: 3211/5599 cut-off events. [2024-06-14 13:53:07,510 INFO L125 PetriNetUnfolderBase]: For 369326/369332 co-relation queries the response was YES. [2024-06-14 13:53:07,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37448 conditions, 5599 events. 3211/5599 cut-off events. For 369326/369332 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 38696 event pairs, 1083 based on Foata normal form. 39/5636 useless extension candidates. Maximal degree in co-relation 37327. Up to 4214 conditions per place. [2024-06-14 13:53:07,570 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 222 selfloop transitions, 72 changer transitions 11/311 dead transitions. [2024-06-14 13:53:07,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 311 transitions, 4899 flow [2024-06-14 13:53:07,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:53:07,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:53:07,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-14 13:53:07,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5818815331010453 [2024-06-14 13:53:07,572 INFO L175 Difference]: Start difference. First operand has 238 places, 285 transitions, 4175 flow. Second operand 7 states and 167 transitions. [2024-06-14 13:53:07,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 311 transitions, 4899 flow [2024-06-14 13:53:08,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 311 transitions, 4729 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-14 13:53:08,400 INFO L231 Difference]: Finished difference. Result has 234 places, 279 transitions, 4035 flow [2024-06-14 13:53:08,400 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4005, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4035, PETRI_PLACES=234, PETRI_TRANSITIONS=279} [2024-06-14 13:53:08,400 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 192 predicate places. [2024-06-14 13:53:08,400 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 279 transitions, 4035 flow [2024-06-14 13:53:08,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:08,401 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:08,401 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:08,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-14 13:53:08,401 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:08,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:08,401 INFO L85 PathProgramCache]: Analyzing trace with hash -837976067, now seen corresponding path program 4 times [2024-06-14 13:53:08,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:08,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833905929] [2024-06-14 13:53:08,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:08,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:08,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:08,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:08,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:08,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833905929] [2024-06-14 13:53:08,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833905929] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:08,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:08,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:53:08,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488514237] [2024-06-14 13:53:08,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:08,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:53:08,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:08,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:53:08,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:53:08,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:08,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 279 transitions, 4035 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:08,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:08,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:08,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:09,311 INFO L124 PetriNetUnfolderBase]: 2880/5030 cut-off events. [2024-06-14 13:53:09,312 INFO L125 PetriNetUnfolderBase]: For 307375/307381 co-relation queries the response was YES. [2024-06-14 13:53:09,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34981 conditions, 5030 events. 2880/5030 cut-off events. For 307375/307381 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 33884 event pairs, 1111 based on Foata normal form. 4/5029 useless extension candidates. Maximal degree in co-relation 34861. Up to 4198 conditions per place. [2024-06-14 13:53:09,369 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 170 selfloop transitions, 135 changer transitions 0/311 dead transitions. [2024-06-14 13:53:09,369 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 311 transitions, 5202 flow [2024-06-14 13:53:09,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:53:09,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:53:09,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-14 13:53:09,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-14 13:53:09,371 INFO L175 Difference]: Start difference. First operand has 234 places, 279 transitions, 4035 flow. Second operand 7 states and 168 transitions. [2024-06-14 13:53:09,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 311 transitions, 5202 flow [2024-06-14 13:53:10,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 311 transitions, 5035 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-14 13:53:10,229 INFO L231 Difference]: Finished difference. Result has 235 places, 288 transitions, 4329 flow [2024-06-14 13:53:10,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3868, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4329, PETRI_PLACES=235, PETRI_TRANSITIONS=288} [2024-06-14 13:53:10,230 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 193 predicate places. [2024-06-14 13:53:10,230 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 288 transitions, 4329 flow [2024-06-14 13:53:10,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:10,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:10,230 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:10,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-14 13:53:10,230 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:10,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:10,231 INFO L85 PathProgramCache]: Analyzing trace with hash -837677537, now seen corresponding path program 5 times [2024-06-14 13:53:10,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:10,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789810875] [2024-06-14 13:53:10,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:10,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:10,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:10,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:10,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:10,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789810875] [2024-06-14 13:53:10,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789810875] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:10,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:10,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:53:10,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360618630] [2024-06-14 13:53:10,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:10,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:53:10,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:10,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:53:10,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:53:10,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:10,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 288 transitions, 4329 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:10,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:10,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:10,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:11,123 INFO L124 PetriNetUnfolderBase]: 2885/5039 cut-off events. [2024-06-14 13:53:11,123 INFO L125 PetriNetUnfolderBase]: For 318057/318063 co-relation queries the response was YES. [2024-06-14 13:53:11,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35325 conditions, 5039 events. 2885/5039 cut-off events. For 318057/318063 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 33994 event pairs, 1112 based on Foata normal form. 4/5038 useless extension candidates. Maximal degree in co-relation 35204. Up to 4202 conditions per place. [2024-06-14 13:53:11,184 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 170 selfloop transitions, 135 changer transitions 0/311 dead transitions. [2024-06-14 13:53:11,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 311 transitions, 5387 flow [2024-06-14 13:53:11,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:53:11,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:53:11,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-14 13:53:11,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5749128919860628 [2024-06-14 13:53:11,185 INFO L175 Difference]: Start difference. First operand has 235 places, 288 transitions, 4329 flow. Second operand 7 states and 165 transitions. [2024-06-14 13:53:11,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 311 transitions, 5387 flow [2024-06-14 13:53:12,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 311 transitions, 5126 flow, removed 61 selfloop flow, removed 4 redundant places. [2024-06-14 13:53:12,007 INFO L231 Difference]: Finished difference. Result has 238 places, 291 transitions, 4420 flow [2024-06-14 13:53:12,008 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4090, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4420, PETRI_PLACES=238, PETRI_TRANSITIONS=291} [2024-06-14 13:53:12,008 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 196 predicate places. [2024-06-14 13:53:12,008 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 291 transitions, 4420 flow [2024-06-14 13:53:12,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:12,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:12,009 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:12,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-14 13:53:12,009 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:12,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:12,009 INFO L85 PathProgramCache]: Analyzing trace with hash -1925755685, now seen corresponding path program 2 times [2024-06-14 13:53:12,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:12,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570496070] [2024-06-14 13:53:12,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:12,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:12,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:12,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:12,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:12,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570496070] [2024-06-14 13:53:12,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570496070] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:12,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:12,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:12,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985543834] [2024-06-14 13:53:12,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:12,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:12,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:12,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:12,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:12,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:12,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 291 transitions, 4420 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:12,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:12,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:12,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:13,006 INFO L124 PetriNetUnfolderBase]: 2890/5032 cut-off events. [2024-06-14 13:53:13,006 INFO L125 PetriNetUnfolderBase]: For 329138/329142 co-relation queries the response was YES. [2024-06-14 13:53:13,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35356 conditions, 5032 events. 2890/5032 cut-off events. For 329138/329142 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 33844 event pairs, 1090 based on Foata normal form. 2/5029 useless extension candidates. Maximal degree in co-relation 35235. Up to 4206 conditions per place. [2024-06-14 13:53:13,057 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 156 selfloop transitions, 156 changer transitions 0/318 dead transitions. [2024-06-14 13:53:13,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 318 transitions, 5501 flow [2024-06-14 13:53:13,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:53:13,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:53:13,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-14 13:53:13,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.573170731707317 [2024-06-14 13:53:13,059 INFO L175 Difference]: Start difference. First operand has 238 places, 291 transitions, 4420 flow. Second operand 8 states and 188 transitions. [2024-06-14 13:53:13,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 318 transitions, 5501 flow [2024-06-14 13:53:13,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 318 transitions, 5219 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-14 13:53:13,830 INFO L231 Difference]: Finished difference. Result has 242 places, 294 transitions, 4525 flow [2024-06-14 13:53:13,830 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4142, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4525, PETRI_PLACES=242, PETRI_TRANSITIONS=294} [2024-06-14 13:53:13,831 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 200 predicate places. [2024-06-14 13:53:13,831 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 294 transitions, 4525 flow [2024-06-14 13:53:13,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:13,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:13,831 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:13,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-14 13:53:13,831 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:13,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:13,832 INFO L85 PathProgramCache]: Analyzing trace with hash 290509075, now seen corresponding path program 3 times [2024-06-14 13:53:13,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:13,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599322424] [2024-06-14 13:53:13,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:13,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:13,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:13,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:13,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:13,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599322424] [2024-06-14 13:53:13,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599322424] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:13,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:13,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:13,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90242737] [2024-06-14 13:53:13,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:13,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:13,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:13,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:13,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:14,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:14,026 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 294 transitions, 4525 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:14,026 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:14,026 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:14,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:14,789 INFO L124 PetriNetUnfolderBase]: 2895/5039 cut-off events. [2024-06-14 13:53:14,790 INFO L125 PetriNetUnfolderBase]: For 340236/340240 co-relation queries the response was YES. [2024-06-14 13:53:14,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35683 conditions, 5039 events. 2895/5039 cut-off events. For 340236/340240 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 33869 event pairs, 1090 based on Foata normal form. 2/5036 useless extension candidates. Maximal degree in co-relation 35561. Up to 4210 conditions per place. [2024-06-14 13:53:14,847 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 154 selfloop transitions, 158 changer transitions 0/318 dead transitions. [2024-06-14 13:53:14,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 318 transitions, 5606 flow [2024-06-14 13:53:14,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:53:14,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:53:14,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-14 13:53:14,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5640243902439024 [2024-06-14 13:53:14,848 INFO L175 Difference]: Start difference. First operand has 242 places, 294 transitions, 4525 flow. Second operand 8 states and 185 transitions. [2024-06-14 13:53:14,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 318 transitions, 5606 flow [2024-06-14 13:53:15,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 318 transitions, 5240 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-14 13:53:15,810 INFO L231 Difference]: Finished difference. Result has 244 places, 297 transitions, 4552 flow [2024-06-14 13:53:15,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4165, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4552, PETRI_PLACES=244, PETRI_TRANSITIONS=297} [2024-06-14 13:53:15,811 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 202 predicate places. [2024-06-14 13:53:15,811 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 297 transitions, 4552 flow [2024-06-14 13:53:15,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:15,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:15,811 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:15,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-14 13:53:15,811 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:15,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:15,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1764435873, now seen corresponding path program 6 times [2024-06-14 13:53:15,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:15,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456013733] [2024-06-14 13:53:15,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:15,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:15,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:15,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:15,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:15,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456013733] [2024-06-14 13:53:15,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456013733] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:15,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:15,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:53:15,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949657851] [2024-06-14 13:53:15,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:15,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:53:15,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:15,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:53:15,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:53:15,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:15,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 297 transitions, 4552 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:15,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:15,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:15,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:16,737 INFO L124 PetriNetUnfolderBase]: 2892/5046 cut-off events. [2024-06-14 13:53:16,737 INFO L125 PetriNetUnfolderBase]: For 349162/349168 co-relation queries the response was YES. [2024-06-14 13:53:16,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35751 conditions, 5046 events. 2892/5046 cut-off events. For 349162/349168 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 34003 event pairs, 1111 based on Foata normal form. 4/5044 useless extension candidates. Maximal degree in co-relation 35628. Up to 4208 conditions per place. [2024-06-14 13:53:16,794 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 167 selfloop transitions, 140 changer transitions 0/313 dead transitions. [2024-06-14 13:53:16,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 313 transitions, 5432 flow [2024-06-14 13:53:16,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:53:16,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:53:16,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 159 transitions. [2024-06-14 13:53:16,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.554006968641115 [2024-06-14 13:53:16,795 INFO L175 Difference]: Start difference. First operand has 244 places, 297 transitions, 4552 flow. Second operand 7 states and 159 transitions. [2024-06-14 13:53:16,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 313 transitions, 5432 flow [2024-06-14 13:53:17,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 313 transitions, 5144 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-14 13:53:17,676 INFO L231 Difference]: Finished difference. Result has 246 places, 297 transitions, 4550 flow [2024-06-14 13:53:17,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4264, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4550, PETRI_PLACES=246, PETRI_TRANSITIONS=297} [2024-06-14 13:53:17,676 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 204 predicate places. [2024-06-14 13:53:17,676 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 297 transitions, 4550 flow [2024-06-14 13:53:17,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:17,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:17,677 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:17,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-14 13:53:17,677 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:17,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:17,677 INFO L85 PathProgramCache]: Analyzing trace with hash 478606043, now seen corresponding path program 4 times [2024-06-14 13:53:17,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:17,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984729091] [2024-06-14 13:53:17,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:17,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:17,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:17,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:17,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:17,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984729091] [2024-06-14 13:53:17,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984729091] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:17,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:17,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:17,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480951459] [2024-06-14 13:53:17,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:17,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:17,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:17,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:17,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:17,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:17,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 297 transitions, 4550 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:17,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:17,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:17,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:18,617 INFO L124 PetriNetUnfolderBase]: 2889/5028 cut-off events. [2024-06-14 13:53:18,618 INFO L125 PetriNetUnfolderBase]: For 359181/359185 co-relation queries the response was YES. [2024-06-14 13:53:18,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35781 conditions, 5028 events. 2889/5028 cut-off events. For 359181/359185 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 33774 event pairs, 1088 based on Foata normal form. 2/5025 useless extension candidates. Maximal degree in co-relation 35657. Up to 4206 conditions per place. [2024-06-14 13:53:18,675 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 154 selfloop transitions, 158 changer transitions 0/318 dead transitions. [2024-06-14 13:53:18,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 318 transitions, 5572 flow [2024-06-14 13:53:18,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:53:18,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:53:18,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-14 13:53:18,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5701219512195121 [2024-06-14 13:53:18,676 INFO L175 Difference]: Start difference. First operand has 246 places, 297 transitions, 4550 flow. Second operand 8 states and 187 transitions. [2024-06-14 13:53:18,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 318 transitions, 5572 flow [2024-06-14 13:53:19,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 318 transitions, 5201 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-14 13:53:19,560 INFO L231 Difference]: Finished difference. Result has 248 places, 297 transitions, 4501 flow [2024-06-14 13:53:19,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4179, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4501, PETRI_PLACES=248, PETRI_TRANSITIONS=297} [2024-06-14 13:53:19,560 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 206 predicate places. [2024-06-14 13:53:19,560 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 297 transitions, 4501 flow [2024-06-14 13:53:19,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:19,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:19,561 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:19,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-14 13:53:19,561 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:19,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:19,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1490378675, now seen corresponding path program 5 times [2024-06-14 13:53:19,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:19,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456669616] [2024-06-14 13:53:19,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:19,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:19,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:19,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:19,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:19,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456669616] [2024-06-14 13:53:19,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456669616] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:19,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:19,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:19,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713576368] [2024-06-14 13:53:19,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:19,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:19,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:19,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:19,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:19,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:19,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 297 transitions, 4501 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:19,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:19,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:19,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:20,543 INFO L124 PetriNetUnfolderBase]: 2886/5042 cut-off events. [2024-06-14 13:53:20,543 INFO L125 PetriNetUnfolderBase]: For 366377/366381 co-relation queries the response was YES. [2024-06-14 13:53:20,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35770 conditions, 5042 events. 2886/5042 cut-off events. For 366377/366381 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 34001 event pairs, 1060 based on Foata normal form. 2/5041 useless extension candidates. Maximal degree in co-relation 35646. Up to 4469 conditions per place. [2024-06-14 13:53:20,600 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 258 selfloop transitions, 51 changer transitions 0/315 dead transitions. [2024-06-14 13:53:20,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 315 transitions, 5287 flow [2024-06-14 13:53:20,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:53:20,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:53:20,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 194 transitions. [2024-06-14 13:53:20,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5257452574525745 [2024-06-14 13:53:20,602 INFO L175 Difference]: Start difference. First operand has 248 places, 297 transitions, 4501 flow. Second operand 9 states and 194 transitions. [2024-06-14 13:53:20,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 315 transitions, 5287 flow [2024-06-14 13:53:21,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 315 transitions, 4719 flow, removed 34 selfloop flow, removed 10 redundant places. [2024-06-14 13:53:21,554 INFO L231 Difference]: Finished difference. Result has 247 places, 297 transitions, 4041 flow [2024-06-14 13:53:21,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3933, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4041, PETRI_PLACES=247, PETRI_TRANSITIONS=297} [2024-06-14 13:53:21,555 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 205 predicate places. [2024-06-14 13:53:21,555 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 297 transitions, 4041 flow [2024-06-14 13:53:21,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:21,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:21,555 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:21,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-14 13:53:21,555 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:21,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:21,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1495919615, now seen corresponding path program 6 times [2024-06-14 13:53:21,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:21,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112560439] [2024-06-14 13:53:21,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:21,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:21,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:21,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:21,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:21,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112560439] [2024-06-14 13:53:21,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112560439] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:21,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:21,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:21,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131900475] [2024-06-14 13:53:21,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:21,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:21,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:21,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:21,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:21,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:21,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 297 transitions, 4041 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:21,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:21,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:21,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:22,549 INFO L124 PetriNetUnfolderBase]: 2883/5037 cut-off events. [2024-06-14 13:53:22,550 INFO L125 PetriNetUnfolderBase]: For 372989/372993 co-relation queries the response was YES. [2024-06-14 13:53:22,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35302 conditions, 5037 events. 2883/5037 cut-off events. For 372989/372993 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 33925 event pairs, 1061 based on Foata normal form. 2/5036 useless extension candidates. Maximal degree in co-relation 35179. Up to 4466 conditions per place. [2024-06-14 13:53:22,605 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 257 selfloop transitions, 51 changer transitions 0/314 dead transitions. [2024-06-14 13:53:22,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 314 transitions, 4705 flow [2024-06-14 13:53:22,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:53:22,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:53:22,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 193 transitions. [2024-06-14 13:53:22,606 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5230352303523035 [2024-06-14 13:53:22,606 INFO L175 Difference]: Start difference. First operand has 247 places, 297 transitions, 4041 flow. Second operand 9 states and 193 transitions. [2024-06-14 13:53:22,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 314 transitions, 4705 flow [2024-06-14 13:53:23,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 314 transitions, 4571 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-14 13:53:23,509 INFO L231 Difference]: Finished difference. Result has 249 places, 297 transitions, 4015 flow [2024-06-14 13:53:23,509 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3907, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4015, PETRI_PLACES=249, PETRI_TRANSITIONS=297} [2024-06-14 13:53:23,510 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 207 predicate places. [2024-06-14 13:53:23,510 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 297 transitions, 4015 flow [2024-06-14 13:53:23,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:23,510 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:23,510 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:23,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-14 13:53:23,510 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:23,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:23,511 INFO L85 PathProgramCache]: Analyzing trace with hash -430432323, now seen corresponding path program 7 times [2024-06-14 13:53:23,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:23,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036335745] [2024-06-14 13:53:23,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:23,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:23,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:23,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:23,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:23,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036335745] [2024-06-14 13:53:23,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036335745] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:23,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:23,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:53:23,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335876822] [2024-06-14 13:53:23,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:23,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:53:23,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:23,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:53:23,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:53:23,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:23,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 297 transitions, 4015 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:23,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:23,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:23,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:24,419 INFO L124 PetriNetUnfolderBase]: 2877/5034 cut-off events. [2024-06-14 13:53:24,420 INFO L125 PetriNetUnfolderBase]: For 383701/383707 co-relation queries the response was YES. [2024-06-14 13:53:24,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35296 conditions, 5034 events. 2877/5034 cut-off events. For 383701/383707 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 34017 event pairs, 1078 based on Foata normal form. 5/5037 useless extension candidates. Maximal degree in co-relation 35172. Up to 4272 conditions per place. [2024-06-14 13:53:24,479 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 210 selfloop transitions, 103 changer transitions 0/319 dead transitions. [2024-06-14 13:53:24,479 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 319 transitions, 4939 flow [2024-06-14 13:53:24,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:53:24,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:53:24,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-14 13:53:24,480 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5888501742160279 [2024-06-14 13:53:24,480 INFO L175 Difference]: Start difference. First operand has 249 places, 297 transitions, 4015 flow. Second operand 7 states and 169 transitions. [2024-06-14 13:53:24,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 319 transitions, 4939 flow [2024-06-14 13:53:25,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 319 transitions, 4779 flow, removed 20 selfloop flow, removed 9 redundant places. [2024-06-14 13:53:25,481 INFO L231 Difference]: Finished difference. Result has 247 places, 297 transitions, 4073 flow [2024-06-14 13:53:25,482 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3855, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4073, PETRI_PLACES=247, PETRI_TRANSITIONS=297} [2024-06-14 13:53:25,482 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 205 predicate places. [2024-06-14 13:53:25,482 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 297 transitions, 4073 flow [2024-06-14 13:53:25,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:25,482 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:25,483 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:25,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-14 13:53:25,483 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:25,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:25,483 INFO L85 PathProgramCache]: Analyzing trace with hash -1535419967, now seen corresponding path program 7 times [2024-06-14 13:53:25,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:25,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464048615] [2024-06-14 13:53:25,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:25,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:25,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:25,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:25,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:25,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464048615] [2024-06-14 13:53:25,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464048615] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:25,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:25,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:25,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561186927] [2024-06-14 13:53:25,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:25,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:25,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:25,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:25,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:25,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:25,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 297 transitions, 4073 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:25,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:25,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:25,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:26,441 INFO L124 PetriNetUnfolderBase]: 2882/5043 cut-off events. [2024-06-14 13:53:26,441 INFO L125 PetriNetUnfolderBase]: For 394369/394375 co-relation queries the response was YES. [2024-06-14 13:53:26,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35708 conditions, 5043 events. 2882/5043 cut-off events. For 394369/394375 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 34053 event pairs, 1078 based on Foata normal form. 4/5045 useless extension candidates. Maximal degree in co-relation 35583. Up to 4276 conditions per place. [2024-06-14 13:53:26,500 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 204 selfloop transitions, 107 changer transitions 0/317 dead transitions. [2024-06-14 13:53:26,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 317 transitions, 5049 flow [2024-06-14 13:53:26,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:53:26,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:53:26,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 178 transitions. [2024-06-14 13:53:26,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5426829268292683 [2024-06-14 13:53:26,501 INFO L175 Difference]: Start difference. First operand has 247 places, 297 transitions, 4073 flow. Second operand 8 states and 178 transitions. [2024-06-14 13:53:26,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 317 transitions, 5049 flow [2024-06-14 13:53:27,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 317 transitions, 4715 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-14 13:53:27,383 INFO L231 Difference]: Finished difference. Result has 246 places, 300 transitions, 4035 flow [2024-06-14 13:53:27,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3753, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4035, PETRI_PLACES=246, PETRI_TRANSITIONS=300} [2024-06-14 13:53:27,384 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 204 predicate places. [2024-06-14 13:53:27,384 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 300 transitions, 4035 flow [2024-06-14 13:53:27,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:27,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:27,384 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:27,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-14 13:53:27,384 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:27,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:27,385 INFO L85 PathProgramCache]: Analyzing trace with hash -1712551487, now seen corresponding path program 8 times [2024-06-14 13:53:27,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:27,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439133504] [2024-06-14 13:53:27,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:27,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:27,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:27,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:27,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:27,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439133504] [2024-06-14 13:53:27,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439133504] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:27,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:27,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:27,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154575534] [2024-06-14 13:53:27,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:27,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:27,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:27,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:27,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:27,609 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:27,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 300 transitions, 4035 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:27,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:27,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:27,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:28,340 INFO L124 PetriNetUnfolderBase]: 2884/5048 cut-off events. [2024-06-14 13:53:28,340 INFO L125 PetriNetUnfolderBase]: For 382030/382036 co-relation queries the response was YES. [2024-06-14 13:53:28,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35375 conditions, 5048 events. 2884/5048 cut-off events. For 382030/382036 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 34099 event pairs, 1078 based on Foata normal form. 5/5051 useless extension candidates. Maximal degree in co-relation 35250. Up to 4277 conditions per place. [2024-06-14 13:53:28,400 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 206 selfloop transitions, 109 changer transitions 0/321 dead transitions. [2024-06-14 13:53:28,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 321 transitions, 5017 flow [2024-06-14 13:53:28,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:53:28,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:53:28,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 199 transitions. [2024-06-14 13:53:28,403 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5392953929539296 [2024-06-14 13:53:28,403 INFO L175 Difference]: Start difference. First operand has 246 places, 300 transitions, 4035 flow. Second operand 9 states and 199 transitions. [2024-06-14 13:53:28,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 321 transitions, 5017 flow [2024-06-14 13:53:29,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 321 transitions, 4824 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-14 13:53:29,391 INFO L231 Difference]: Finished difference. Result has 250 places, 303 transitions, 4135 flow [2024-06-14 13:53:29,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3844, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4135, PETRI_PLACES=250, PETRI_TRANSITIONS=303} [2024-06-14 13:53:29,392 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 208 predicate places. [2024-06-14 13:53:29,392 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 303 transitions, 4135 flow [2024-06-14 13:53:29,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:29,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:29,392 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:29,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-14 13:53:29,392 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:29,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:29,393 INFO L85 PathProgramCache]: Analyzing trace with hash -724429683, now seen corresponding path program 9 times [2024-06-14 13:53:29,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:29,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124830883] [2024-06-14 13:53:29,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:29,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:29,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:29,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:29,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:29,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124830883] [2024-06-14 13:53:29,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124830883] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:29,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:29,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:29,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415053098] [2024-06-14 13:53:29,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:29,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:29,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:29,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:29,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:29,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:29,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 303 transitions, 4135 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:29,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:29,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:29,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:30,345 INFO L124 PetriNetUnfolderBase]: 2881/5039 cut-off events. [2024-06-14 13:53:30,345 INFO L125 PetriNetUnfolderBase]: For 389906/389910 co-relation queries the response was YES. [2024-06-14 13:53:30,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35490 conditions, 5039 events. 2881/5039 cut-off events. For 389906/389910 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 34017 event pairs, 1060 based on Foata normal form. 2/5038 useless extension candidates. Maximal degree in co-relation 35364. Up to 4275 conditions per place. [2024-06-14 13:53:30,403 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 197 selfloop transitions, 124 changer transitions 0/327 dead transitions. [2024-06-14 13:53:30,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 327 transitions, 5083 flow [2024-06-14 13:53:30,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:53:30,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:53:30,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 208 transitions. [2024-06-14 13:53:30,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5636856368563685 [2024-06-14 13:53:30,404 INFO L175 Difference]: Start difference. First operand has 250 places, 303 transitions, 4135 flow. Second operand 9 states and 208 transitions. [2024-06-14 13:53:30,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 327 transitions, 5083 flow [2024-06-14 13:53:31,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 327 transitions, 4751 flow, removed 41 selfloop flow, removed 7 redundant places. [2024-06-14 13:53:31,430 INFO L231 Difference]: Finished difference. Result has 252 places, 303 transitions, 4061 flow [2024-06-14 13:53:31,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3803, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4061, PETRI_PLACES=252, PETRI_TRANSITIONS=303} [2024-06-14 13:53:31,431 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 210 predicate places. [2024-06-14 13:53:31,431 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 303 transitions, 4061 flow [2024-06-14 13:53:31,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:31,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:31,431 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:31,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-14 13:53:31,431 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:31,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:31,432 INFO L85 PathProgramCache]: Analyzing trace with hash 721590693, now seen corresponding path program 10 times [2024-06-14 13:53:31,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:31,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159329199] [2024-06-14 13:53:31,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:31,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:31,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:31,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:31,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:31,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159329199] [2024-06-14 13:53:31,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159329199] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:31,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:31,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:31,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614247325] [2024-06-14 13:53:31,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:31,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:31,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:31,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:31,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:31,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:31,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 303 transitions, 4061 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:31,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:31,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:31,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:32,404 INFO L124 PetriNetUnfolderBase]: 2878/5035 cut-off events. [2024-06-14 13:53:32,405 INFO L125 PetriNetUnfolderBase]: For 398139/398143 co-relation queries the response was YES. [2024-06-14 13:53:32,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35504 conditions, 5035 events. 2878/5035 cut-off events. For 398139/398143 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 33952 event pairs, 1060 based on Foata normal form. 2/5034 useless extension candidates. Maximal degree in co-relation 35377. Up to 4273 conditions per place. [2024-06-14 13:53:32,461 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 195 selfloop transitions, 128 changer transitions 0/329 dead transitions. [2024-06-14 13:53:32,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 329 transitions, 4897 flow [2024-06-14 13:53:32,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:53:32,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:53:32,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 211 transitions. [2024-06-14 13:53:32,462 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5718157181571816 [2024-06-14 13:53:32,462 INFO L175 Difference]: Start difference. First operand has 252 places, 303 transitions, 4061 flow. Second operand 9 states and 211 transitions. [2024-06-14 13:53:32,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 329 transitions, 4897 flow [2024-06-14 13:53:33,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 329 transitions, 4592 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-06-14 13:53:33,558 INFO L231 Difference]: Finished difference. Result has 253 places, 303 transitions, 4024 flow [2024-06-14 13:53:33,559 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3758, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4024, PETRI_PLACES=253, PETRI_TRANSITIONS=303} [2024-06-14 13:53:33,560 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 211 predicate places. [2024-06-14 13:53:33,560 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 303 transitions, 4024 flow [2024-06-14 13:53:33,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:33,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:33,560 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:33,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-14 13:53:33,560 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:33,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:33,561 INFO L85 PathProgramCache]: Analyzing trace with hash -12516117, now seen corresponding path program 7 times [2024-06-14 13:53:33,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:33,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975183077] [2024-06-14 13:53:33,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:33,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:33,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:33,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:33,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:33,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975183077] [2024-06-14 13:53:33,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975183077] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:33,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:33,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:33,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127298004] [2024-06-14 13:53:33,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:33,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:33,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:33,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:33,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:33,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:33,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 303 transitions, 4024 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:33,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:33,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:33,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:34,573 INFO L124 PetriNetUnfolderBase]: 2997/5241 cut-off events. [2024-06-14 13:53:34,573 INFO L125 PetriNetUnfolderBase]: For 476822/476828 co-relation queries the response was YES. [2024-06-14 13:53:34,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36271 conditions, 5241 events. 2997/5241 cut-off events. For 476822/476828 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 35712 event pairs, 1125 based on Foata normal form. 45/5284 useless extension candidates. Maximal degree in co-relation 36144. Up to 4272 conditions per place. [2024-06-14 13:53:34,632 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 207 selfloop transitions, 112 changer transitions 3/328 dead transitions. [2024-06-14 13:53:34,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 328 transitions, 5044 flow [2024-06-14 13:53:34,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:53:34,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:53:34,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-14 13:53:34,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5670731707317073 [2024-06-14 13:53:34,633 INFO L175 Difference]: Start difference. First operand has 253 places, 303 transitions, 4024 flow. Second operand 8 states and 186 transitions. [2024-06-14 13:53:34,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 328 transitions, 5044 flow [2024-06-14 13:53:35,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 328 transitions, 4728 flow, removed 10 selfloop flow, removed 10 redundant places. [2024-06-14 13:53:35,506 INFO L231 Difference]: Finished difference. Result has 251 places, 304 transitions, 3978 flow [2024-06-14 13:53:35,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3712, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3978, PETRI_PLACES=251, PETRI_TRANSITIONS=304} [2024-06-14 13:53:35,509 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 209 predicate places. [2024-06-14 13:53:35,509 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 304 transitions, 3978 flow [2024-06-14 13:53:35,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:35,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:35,510 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:35,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-14 13:53:35,510 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:35,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:35,510 INFO L85 PathProgramCache]: Analyzing trace with hash -1712274905, now seen corresponding path program 2 times [2024-06-14 13:53:35,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:35,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682586316] [2024-06-14 13:53:35,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:35,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:35,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:35,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:35,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:35,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682586316] [2024-06-14 13:53:35,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682586316] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:35,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:35,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:35,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094283080] [2024-06-14 13:53:35,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:35,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:35,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:35,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:35,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:35,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:35,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 304 transitions, 3978 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:35,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:35,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:35,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:36,654 INFO L124 PetriNetUnfolderBase]: 3229/5659 cut-off events. [2024-06-14 13:53:36,654 INFO L125 PetriNetUnfolderBase]: For 500880/500886 co-relation queries the response was YES. [2024-06-14 13:53:36,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39724 conditions, 5659 events. 3229/5659 cut-off events. For 500880/500886 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 39352 event pairs, 1162 based on Foata normal form. 39/5696 useless extension candidates. Maximal degree in co-relation 39597. Up to 4270 conditions per place. [2024-06-14 13:53:36,723 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 222 selfloop transitions, 110 changer transitions 0/338 dead transitions. [2024-06-14 13:53:36,723 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 338 transitions, 5248 flow [2024-06-14 13:53:36,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:53:36,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:53:36,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-14 13:53:36,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5823170731707317 [2024-06-14 13:53:36,724 INFO L175 Difference]: Start difference. First operand has 251 places, 304 transitions, 3978 flow. Second operand 8 states and 191 transitions. [2024-06-14 13:53:36,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 338 transitions, 5248 flow [2024-06-14 13:53:37,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 338 transitions, 4994 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-14 13:53:37,911 INFO L231 Difference]: Finished difference. Result has 254 places, 308 transitions, 4077 flow [2024-06-14 13:53:37,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3724, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4077, PETRI_PLACES=254, PETRI_TRANSITIONS=308} [2024-06-14 13:53:37,912 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 212 predicate places. [2024-06-14 13:53:37,912 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 308 transitions, 4077 flow [2024-06-14 13:53:37,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:37,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:37,912 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:37,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-14 13:53:37,912 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:37,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:37,913 INFO L85 PathProgramCache]: Analyzing trace with hash -1699330235, now seen corresponding path program 3 times [2024-06-14 13:53:37,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:37,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251520807] [2024-06-14 13:53:37,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:37,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:37,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:38,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:38,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:38,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251520807] [2024-06-14 13:53:38,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251520807] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:38,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:38,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:38,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522736819] [2024-06-14 13:53:38,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:38,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:38,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:38,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:38,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:38,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:38,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 308 transitions, 4077 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:38,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:38,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:38,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:39,121 INFO L124 PetriNetUnfolderBase]: 3572/6254 cut-off events. [2024-06-14 13:53:39,121 INFO L125 PetriNetUnfolderBase]: For 596605/596611 co-relation queries the response was YES. [2024-06-14 13:53:39,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45498 conditions, 6254 events. 3572/6254 cut-off events. For 596605/596611 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 44425 event pairs, 1256 based on Foata normal form. 39/6291 useless extension candidates. Maximal degree in co-relation 45369. Up to 3934 conditions per place. [2024-06-14 13:53:39,187 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 225 selfloop transitions, 118 changer transitions 0/349 dead transitions. [2024-06-14 13:53:39,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 349 transitions, 5563 flow [2024-06-14 13:53:39,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:53:39,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:53:39,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-14 13:53:39,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5975609756097561 [2024-06-14 13:53:39,189 INFO L175 Difference]: Start difference. First operand has 254 places, 308 transitions, 4077 flow. Second operand 8 states and 196 transitions. [2024-06-14 13:53:39,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 349 transitions, 5563 flow [2024-06-14 13:53:40,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 349 transitions, 5376 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-14 13:53:40,531 INFO L231 Difference]: Finished difference. Result has 259 places, 311 transitions, 4233 flow [2024-06-14 13:53:40,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3890, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4233, PETRI_PLACES=259, PETRI_TRANSITIONS=311} [2024-06-14 13:53:40,532 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 217 predicate places. [2024-06-14 13:53:40,532 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 311 transitions, 4233 flow [2024-06-14 13:53:40,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:40,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:40,532 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:40,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-14 13:53:40,533 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:40,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:40,533 INFO L85 PathProgramCache]: Analyzing trace with hash -571703117, now seen corresponding path program 1 times [2024-06-14 13:53:40,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:40,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095553760] [2024-06-14 13:53:40,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:40,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:40,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:40,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:40,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:40,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095553760] [2024-06-14 13:53:40,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095553760] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:40,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:40,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:40,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682269231] [2024-06-14 13:53:40,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:40,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:40,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:40,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:40,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:40,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:40,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 311 transitions, 4233 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:40,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:40,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:40,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:41,784 INFO L124 PetriNetUnfolderBase]: 3592/6285 cut-off events. [2024-06-14 13:53:41,784 INFO L125 PetriNetUnfolderBase]: For 559877/559877 co-relation queries the response was YES. [2024-06-14 13:53:41,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46029 conditions, 6285 events. 3592/6285 cut-off events. For 559877/559877 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 44905 event pairs, 1382 based on Foata normal form. 6/6290 useless extension candidates. Maximal degree in co-relation 45897. Up to 5627 conditions per place. [2024-06-14 13:53:41,858 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 289 selfloop transitions, 49 changer transitions 0/344 dead transitions. [2024-06-14 13:53:41,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 344 transitions, 5070 flow [2024-06-14 13:53:41,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:53:41,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:53:41,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-14 13:53:41,859 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487804878048781 [2024-06-14 13:53:41,859 INFO L175 Difference]: Start difference. First operand has 259 places, 311 transitions, 4233 flow. Second operand 8 states and 180 transitions. [2024-06-14 13:53:41,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 344 transitions, 5070 flow [2024-06-14 13:53:43,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 344 transitions, 4710 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-14 13:53:43,220 INFO L231 Difference]: Finished difference. Result has 261 places, 312 transitions, 3999 flow [2024-06-14 13:53:43,220 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3879, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3999, PETRI_PLACES=261, PETRI_TRANSITIONS=312} [2024-06-14 13:53:43,220 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 219 predicate places. [2024-06-14 13:53:43,221 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 312 transitions, 3999 flow [2024-06-14 13:53:43,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:43,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:43,221 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:43,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-14 13:53:43,221 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:43,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:43,221 INFO L85 PathProgramCache]: Analyzing trace with hash 290785843, now seen corresponding path program 2 times [2024-06-14 13:53:43,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:43,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607930479] [2024-06-14 13:53:43,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:43,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:43,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:43,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:43,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:43,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607930479] [2024-06-14 13:53:43,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607930479] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:43,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:43,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:43,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470984344] [2024-06-14 13:53:43,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:43,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:43,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:43,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:43,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:43,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:43,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 312 transitions, 3999 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:43,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:43,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:43,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:44,391 INFO L124 PetriNetUnfolderBase]: 3612/6322 cut-off events. [2024-06-14 13:53:44,391 INFO L125 PetriNetUnfolderBase]: For 572670/572670 co-relation queries the response was YES. [2024-06-14 13:53:44,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45355 conditions, 6322 events. 3612/6322 cut-off events. For 572670/572670 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 45315 event pairs, 1423 based on Foata normal form. 6/6327 useless extension candidates. Maximal degree in co-relation 45223. Up to 5679 conditions per place. [2024-06-14 13:53:44,464 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 292 selfloop transitions, 45 changer transitions 0/343 dead transitions. [2024-06-14 13:53:44,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 343 transitions, 4956 flow [2024-06-14 13:53:44,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:53:44,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:53:44,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 194 transitions. [2024-06-14 13:53:44,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5257452574525745 [2024-06-14 13:53:44,465 INFO L175 Difference]: Start difference. First operand has 261 places, 312 transitions, 3999 flow. Second operand 9 states and 194 transitions. [2024-06-14 13:53:44,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 343 transitions, 4956 flow [2024-06-14 13:53:45,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 343 transitions, 4827 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-14 13:53:45,925 INFO L231 Difference]: Finished difference. Result has 263 places, 313 transitions, 3983 flow [2024-06-14 13:53:45,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3873, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3983, PETRI_PLACES=263, PETRI_TRANSITIONS=313} [2024-06-14 13:53:45,926 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 221 predicate places. [2024-06-14 13:53:45,926 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 313 transitions, 3983 flow [2024-06-14 13:53:45,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:45,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:45,926 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:45,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-14 13:53:45,926 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:45,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:45,927 INFO L85 PathProgramCache]: Analyzing trace with hash -774553951, now seen corresponding path program 3 times [2024-06-14 13:53:45,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:45,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048914866] [2024-06-14 13:53:45,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:45,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:45,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:46,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:46,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:46,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048914866] [2024-06-14 13:53:46,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048914866] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:46,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:46,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:46,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693004779] [2024-06-14 13:53:46,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:46,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:46,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:46,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:46,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:46,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:46,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 313 transitions, 3983 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:46,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:46,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:46,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:47,071 INFO L124 PetriNetUnfolderBase]: 3594/6296 cut-off events. [2024-06-14 13:53:47,071 INFO L125 PetriNetUnfolderBase]: For 574920/574920 co-relation queries the response was YES. [2024-06-14 13:53:47,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44769 conditions, 6296 events. 3594/6296 cut-off events. For 574920/574920 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 45080 event pairs, 1421 based on Foata normal form. 8/6303 useless extension candidates. Maximal degree in co-relation 44637. Up to 5701 conditions per place. [2024-06-14 13:53:47,147 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 290 selfloop transitions, 42 changer transitions 0/338 dead transitions. [2024-06-14 13:53:47,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 338 transitions, 4761 flow [2024-06-14 13:53:47,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:53:47,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:53:47,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 174 transitions. [2024-06-14 13:53:47,149 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5304878048780488 [2024-06-14 13:53:47,150 INFO L175 Difference]: Start difference. First operand has 263 places, 313 transitions, 3983 flow. Second operand 8 states and 174 transitions. [2024-06-14 13:53:47,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 338 transitions, 4761 flow [2024-06-14 13:53:48,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 338 transitions, 4643 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-14 13:53:48,330 INFO L231 Difference]: Finished difference. Result has 265 places, 313 transitions, 3954 flow [2024-06-14 13:53:48,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3865, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3954, PETRI_PLACES=265, PETRI_TRANSITIONS=313} [2024-06-14 13:53:48,346 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 223 predicate places. [2024-06-14 13:53:48,346 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 313 transitions, 3954 flow [2024-06-14 13:53:48,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:48,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:48,346 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:48,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-14 13:53:48,347 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:48,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:48,347 INFO L85 PathProgramCache]: Analyzing trace with hash -430155183, now seen corresponding path program 4 times [2024-06-14 13:53:48,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:48,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323675628] [2024-06-14 13:53:48,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:48,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:48,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:48,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:48,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:48,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323675628] [2024-06-14 13:53:48,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323675628] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:48,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:48,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:53:48,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651174974] [2024-06-14 13:53:48,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:48,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:53:48,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:48,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:53:48,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:53:48,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:48,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 313 transitions, 3954 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:48,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:48,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:48,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:49,601 INFO L124 PetriNetUnfolderBase]: 3816/6671 cut-off events. [2024-06-14 13:53:49,601 INFO L125 PetriNetUnfolderBase]: For 617925/617927 co-relation queries the response was YES. [2024-06-14 13:53:49,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44634 conditions, 6671 events. 3816/6671 cut-off events. For 617925/617927 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 48186 event pairs, 1408 based on Foata normal form. 42/6710 useless extension candidates. Maximal degree in co-relation 44502. Up to 5448 conditions per place. [2024-06-14 13:53:49,681 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 292 selfloop transitions, 44 changer transitions 11/353 dead transitions. [2024-06-14 13:53:49,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 353 transitions, 4907 flow [2024-06-14 13:53:49,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:53:49,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:53:49,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-14 13:53:49,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5670731707317073 [2024-06-14 13:53:49,683 INFO L175 Difference]: Start difference. First operand has 265 places, 313 transitions, 3954 flow. Second operand 8 states and 186 transitions. [2024-06-14 13:53:49,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 353 transitions, 4907 flow [2024-06-14 13:53:50,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 353 transitions, 4816 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-14 13:53:51,003 INFO L231 Difference]: Finished difference. Result has 267 places, 319 transitions, 4048 flow [2024-06-14 13:53:51,003 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3865, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4048, PETRI_PLACES=267, PETRI_TRANSITIONS=319} [2024-06-14 13:53:51,004 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 225 predicate places. [2024-06-14 13:53:51,004 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 319 transitions, 4048 flow [2024-06-14 13:53:51,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:51,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:51,004 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:51,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-14 13:53:51,004 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:51,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:51,005 INFO L85 PathProgramCache]: Analyzing trace with hash -729693855, now seen corresponding path program 5 times [2024-06-14 13:53:51,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:51,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397732470] [2024-06-14 13:53:51,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:51,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:51,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:51,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:51,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:51,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397732470] [2024-06-14 13:53:51,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397732470] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:51,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:51,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:53:51,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282861367] [2024-06-14 13:53:51,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:51,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:53:51,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:51,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:53:51,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:53:51,197 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:51,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 319 transitions, 4048 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:51,198 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:51,198 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:51,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:52,231 INFO L124 PetriNetUnfolderBase]: 3616/6341 cut-off events. [2024-06-14 13:53:52,231 INFO L125 PetriNetUnfolderBase]: For 535051/535053 co-relation queries the response was YES. [2024-06-14 13:53:52,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40871 conditions, 6341 events. 3616/6341 cut-off events. For 535051/535053 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 45515 event pairs, 1121 based on Foata normal form. 42/6380 useless extension candidates. Maximal degree in co-relation 40737. Up to 4394 conditions per place. [2024-06-14 13:53:52,299 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 254 selfloop transitions, 86 changer transitions 10/356 dead transitions. [2024-06-14 13:53:52,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 356 transitions, 4897 flow [2024-06-14 13:53:52,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:53:52,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:53:52,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-14 13:53:52,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-14 13:53:52,300 INFO L175 Difference]: Start difference. First operand has 267 places, 319 transitions, 4048 flow. Second operand 8 states and 200 transitions. [2024-06-14 13:53:52,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 356 transitions, 4897 flow [2024-06-14 13:53:53,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 356 transitions, 4773 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-14 13:53:53,378 INFO L231 Difference]: Finished difference. Result has 271 places, 313 transitions, 4067 flow [2024-06-14 13:53:53,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3926, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4067, PETRI_PLACES=271, PETRI_TRANSITIONS=313} [2024-06-14 13:53:53,378 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 229 predicate places. [2024-06-14 13:53:53,379 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 313 transitions, 4067 flow [2024-06-14 13:53:53,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:53,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:53,379 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:53,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-14 13:53:53,379 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:53,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:53,379 INFO L85 PathProgramCache]: Analyzing trace with hash 2079784462, now seen corresponding path program 1 times [2024-06-14 13:53:53,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:53,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346946632] [2024-06-14 13:53:53,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:53,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:53,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:53,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:53,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:53,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346946632] [2024-06-14 13:53:53,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346946632] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:53,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:53,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:53,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938731621] [2024-06-14 13:53:53,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:53,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:53,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:53,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:53,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:53,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:53,599 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 313 transitions, 4067 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:53,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:53,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:53,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:54,583 INFO L124 PetriNetUnfolderBase]: 3466/6047 cut-off events. [2024-06-14 13:53:54,583 INFO L125 PetriNetUnfolderBase]: For 500187/500189 co-relation queries the response was YES. [2024-06-14 13:53:54,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41689 conditions, 6047 events. 3466/6047 cut-off events. For 500187/500189 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 42685 event pairs, 1148 based on Foata normal form. 10/6050 useless extension candidates. Maximal degree in co-relation 41553. Up to 4978 conditions per place. [2024-06-14 13:53:54,652 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 246 selfloop transitions, 102 changer transitions 0/354 dead transitions. [2024-06-14 13:53:54,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 354 transitions, 5325 flow [2024-06-14 13:53:54,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:53:54,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:53:54,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 219 transitions. [2024-06-14 13:53:54,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5934959349593496 [2024-06-14 13:53:54,654 INFO L175 Difference]: Start difference. First operand has 271 places, 313 transitions, 4067 flow. Second operand 9 states and 219 transitions. [2024-06-14 13:53:54,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 354 transitions, 5325 flow [2024-06-14 13:53:56,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 354 transitions, 5175 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-14 13:53:56,008 INFO L231 Difference]: Finished difference. Result has 275 places, 317 transitions, 4285 flow [2024-06-14 13:53:56,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3921, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4285, PETRI_PLACES=275, PETRI_TRANSITIONS=317} [2024-06-14 13:53:56,009 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 233 predicate places. [2024-06-14 13:53:56,009 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 317 transitions, 4285 flow [2024-06-14 13:53:56,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:56,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:56,009 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:56,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-14 13:53:56,010 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:56,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:56,010 INFO L85 PathProgramCache]: Analyzing trace with hash 2082641422, now seen corresponding path program 2 times [2024-06-14 13:53:56,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:56,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973521811] [2024-06-14 13:53:56,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:56,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:56,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:56,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:56,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:56,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973521811] [2024-06-14 13:53:56,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973521811] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:56,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:56,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:56,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241490125] [2024-06-14 13:53:56,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:56,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:56,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:56,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:56,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:56,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:56,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 317 transitions, 4285 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:56,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:56,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:56,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:57,143 INFO L124 PetriNetUnfolderBase]: 3443/6016 cut-off events. [2024-06-14 13:53:57,143 INFO L125 PetriNetUnfolderBase]: For 477132/477134 co-relation queries the response was YES. [2024-06-14 13:53:57,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40738 conditions, 6016 events. 3443/6016 cut-off events. For 477132/477134 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 42483 event pairs, 1286 based on Foata normal form. 10/6021 useless extension candidates. Maximal degree in co-relation 40601. Up to 5264 conditions per place. [2024-06-14 13:53:57,211 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 250 selfloop transitions, 88 changer transitions 0/344 dead transitions. [2024-06-14 13:53:57,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 344 transitions, 5185 flow [2024-06-14 13:53:57,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:53:57,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:53:57,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 210 transitions. [2024-06-14 13:53:57,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5691056910569106 [2024-06-14 13:53:57,213 INFO L175 Difference]: Start difference. First operand has 275 places, 317 transitions, 4285 flow. Second operand 9 states and 210 transitions. [2024-06-14 13:53:57,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 344 transitions, 5185 flow [2024-06-14 13:53:58,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 344 transitions, 4922 flow, removed 65 selfloop flow, removed 7 redundant places. [2024-06-14 13:53:58,637 INFO L231 Difference]: Finished difference. Result has 277 places, 317 transitions, 4211 flow [2024-06-14 13:53:58,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4026, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4211, PETRI_PLACES=277, PETRI_TRANSITIONS=317} [2024-06-14 13:53:58,637 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 235 predicate places. [2024-06-14 13:53:58,637 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 317 transitions, 4211 flow [2024-06-14 13:53:58,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:58,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:58,638 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:58,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-14 13:53:58,638 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:53:58,638 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:58,638 INFO L85 PathProgramCache]: Analyzing trace with hash -2024198623, now seen corresponding path program 1 times [2024-06-14 13:53:58,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:58,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116768135] [2024-06-14 13:53:58,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:58,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:58,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:58,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:58,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:58,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116768135] [2024-06-14 13:53:58,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116768135] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:58,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:58,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:58,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338281037] [2024-06-14 13:53:58,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:58,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:58,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:58,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:58,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:58,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:58,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 317 transitions, 4211 flow. Second operand has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:58,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:58,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:58,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:59,762 INFO L124 PetriNetUnfolderBase]: 3448/6037 cut-off events. [2024-06-14 13:53:59,763 INFO L125 PetriNetUnfolderBase]: For 440866/440872 co-relation queries the response was YES. [2024-06-14 13:53:59,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40032 conditions, 6037 events. 3448/6037 cut-off events. For 440866/440872 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 42772 event pairs, 1291 based on Foata normal form. 7/6043 useless extension candidates. Maximal degree in co-relation 39895. Up to 5314 conditions per place. [2024-06-14 13:53:59,836 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 268 selfloop transitions, 75 changer transitions 0/349 dead transitions. [2024-06-14 13:53:59,837 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 349 transitions, 5156 flow [2024-06-14 13:53:59,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:53:59,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:53:59,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 205 transitions. [2024-06-14 13:53:59,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2024-06-14 13:53:59,838 INFO L175 Difference]: Start difference. First operand has 277 places, 317 transitions, 4211 flow. Second operand 9 states and 205 transitions. [2024-06-14 13:53:59,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 349 transitions, 5156 flow [2024-06-14 13:54:01,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 349 transitions, 4938 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-14 13:54:01,199 INFO L231 Difference]: Finished difference. Result has 277 places, 320 transitions, 4200 flow [2024-06-14 13:54:01,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4001, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4200, PETRI_PLACES=277, PETRI_TRANSITIONS=320} [2024-06-14 13:54:01,199 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 235 predicate places. [2024-06-14 13:54:01,199 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 320 transitions, 4200 flow [2024-06-14 13:54:01,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:01,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:01,200 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] [2024-06-14 13:54:01,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-14 13:54:01,200 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:54:01,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:01,200 INFO L85 PathProgramCache]: Analyzing trace with hash -1692362843, now seen corresponding path program 2 times [2024-06-14 13:54:01,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:01,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943510983] [2024-06-14 13:54:01,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:01,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:01,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:01,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:01,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:01,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943510983] [2024-06-14 13:54:01,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943510983] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:01,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:01,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:54:01,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854063453] [2024-06-14 13:54:01,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:01,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:54:01,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:01,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:54:01,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:54:01,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:01,388 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 320 transitions, 4200 flow. Second operand has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:01,388 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:01,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:01,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:02,316 INFO L124 PetriNetUnfolderBase]: 3453/6041 cut-off events. [2024-06-14 13:54:02,316 INFO L125 PetriNetUnfolderBase]: For 440120/440124 co-relation queries the response was YES. [2024-06-14 13:54:02,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39959 conditions, 6041 events. 3453/6041 cut-off events. For 440120/440124 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 42756 event pairs, 1305 based on Foata normal form. 3/6042 useless extension candidates. Maximal degree in co-relation 39822. Up to 5320 conditions per place. [2024-06-14 13:54:02,387 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 253 selfloop transitions, 83 changer transitions 0/342 dead transitions. [2024-06-14 13:54:02,387 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 342 transitions, 5105 flow [2024-06-14 13:54:02,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:54:02,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:54:02,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 179 transitions. [2024-06-14 13:54:02,388 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5457317073170732 [2024-06-14 13:54:02,388 INFO L175 Difference]: Start difference. First operand has 277 places, 320 transitions, 4200 flow. Second operand 8 states and 179 transitions. [2024-06-14 13:54:02,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 342 transitions, 5105 flow [2024-06-14 13:54:03,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 342 transitions, 4939 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-14 13:54:03,626 INFO L231 Difference]: Finished difference. Result has 278 places, 323 transitions, 4255 flow [2024-06-14 13:54:03,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4040, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4255, PETRI_PLACES=278, PETRI_TRANSITIONS=323} [2024-06-14 13:54:03,626 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 236 predicate places. [2024-06-14 13:54:03,626 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 323 transitions, 4255 flow [2024-06-14 13:54:03,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:03,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:03,627 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:54:03,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-14 13:54:03,627 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:54:03,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:03,627 INFO L85 PathProgramCache]: Analyzing trace with hash -1683097253, now seen corresponding path program 3 times [2024-06-14 13:54:03,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:03,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111346708] [2024-06-14 13:54:03,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:03,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:03,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:03,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:03,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:03,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111346708] [2024-06-14 13:54:03,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111346708] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:03,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:03,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:54:03,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992397504] [2024-06-14 13:54:03,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:03,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:54:03,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:03,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:54:03,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:54:03,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:03,814 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 323 transitions, 4255 flow. Second operand has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:03,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:03,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:03,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:04,814 INFO L124 PetriNetUnfolderBase]: 3458/6050 cut-off events. [2024-06-14 13:54:04,815 INFO L125 PetriNetUnfolderBase]: For 451835/451839 co-relation queries the response was YES. [2024-06-14 13:54:04,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40186 conditions, 6050 events. 3458/6050 cut-off events. For 451835/451839 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 42829 event pairs, 1305 based on Foata normal form. 3/6051 useless extension candidates. Maximal degree in co-relation 40048. Up to 5326 conditions per place. [2024-06-14 13:54:04,876 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 248 selfloop transitions, 88 changer transitions 0/342 dead transitions. [2024-06-14 13:54:04,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 342 transitions, 5154 flow [2024-06-14 13:54:04,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:54:04,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:54:04,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 177 transitions. [2024-06-14 13:54:04,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5396341463414634 [2024-06-14 13:54:04,878 INFO L175 Difference]: Start difference. First operand has 278 places, 323 transitions, 4255 flow. Second operand 8 states and 177 transitions. [2024-06-14 13:54:04,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 342 transitions, 5154 flow [2024-06-14 13:54:06,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 342 transitions, 4972 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-14 13:54:06,255 INFO L231 Difference]: Finished difference. Result has 280 places, 326 transitions, 4304 flow [2024-06-14 13:54:06,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4079, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4304, PETRI_PLACES=280, PETRI_TRANSITIONS=326} [2024-06-14 13:54:06,255 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 238 predicate places. [2024-06-14 13:54:06,256 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 326 transitions, 4304 flow [2024-06-14 13:54:06,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:06,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:06,256 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:54:06,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-14 13:54:06,256 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:54:06,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:06,257 INFO L85 PathProgramCache]: Analyzing trace with hash -1572285893, now seen corresponding path program 4 times [2024-06-14 13:54:06,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:06,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578036375] [2024-06-14 13:54:06,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:06,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:06,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:06,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:06,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:06,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578036375] [2024-06-14 13:54:06,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578036375] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:06,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:06,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:54:06,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486428522] [2024-06-14 13:54:06,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:06,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:54:06,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:06,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:54:06,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:54:06,459 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:06,459 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 326 transitions, 4304 flow. Second operand has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:06,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:06,459 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:06,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:07,364 INFO L124 PetriNetUnfolderBase]: 3455/6046 cut-off events. [2024-06-14 13:54:07,364 INFO L125 PetriNetUnfolderBase]: For 461139/461143 co-relation queries the response was YES. [2024-06-14 13:54:07,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40254 conditions, 6046 events. 3455/6046 cut-off events. For 461139/461143 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 42795 event pairs, 1305 based on Foata normal form. 3/6047 useless extension candidates. Maximal degree in co-relation 40115. Up to 5323 conditions per place. [2024-06-14 13:54:07,433 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 248 selfloop transitions, 89 changer transitions 0/343 dead transitions. [2024-06-14 13:54:07,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 343 transitions, 5018 flow [2024-06-14 13:54:07,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:54:07,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:54:07,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 210 transitions. [2024-06-14 13:54:07,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-14 13:54:07,435 INFO L175 Difference]: Start difference. First operand has 280 places, 326 transitions, 4304 flow. Second operand 10 states and 210 transitions. [2024-06-14 13:54:07,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 343 transitions, 5018 flow [2024-06-14 13:54:08,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 343 transitions, 4847 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-14 13:54:08,788 INFO L231 Difference]: Finished difference. Result has 285 places, 326 transitions, 4317 flow [2024-06-14 13:54:08,788 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4133, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4317, PETRI_PLACES=285, PETRI_TRANSITIONS=326} [2024-06-14 13:54:08,789 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 243 predicate places. [2024-06-14 13:54:08,789 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 326 transitions, 4317 flow [2024-06-14 13:54:08,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:08,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:08,789 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:54:08,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-14 13:54:08,789 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:54:08,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:08,790 INFO L85 PathProgramCache]: Analyzing trace with hash -201049202, now seen corresponding path program 3 times [2024-06-14 13:54:08,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:08,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386485654] [2024-06-14 13:54:08,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:08,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:08,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:08,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:08,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:08,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386485654] [2024-06-14 13:54:08,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386485654] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:08,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:08,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:54:08,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759446632] [2024-06-14 13:54:08,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:08,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:54:08,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:08,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:54:08,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:54:08,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:08,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 326 transitions, 4317 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:08,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:08,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:08,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:09,931 INFO L124 PetriNetUnfolderBase]: 3522/6122 cut-off events. [2024-06-14 13:54:09,931 INFO L125 PetriNetUnfolderBase]: For 508008/508010 co-relation queries the response was YES. [2024-06-14 13:54:09,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42199 conditions, 6122 events. 3522/6122 cut-off events. For 508008/508010 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 43222 event pairs, 1327 based on Foata normal form. 2/6119 useless extension candidates. Maximal degree in co-relation 42059. Up to 5169 conditions per place. [2024-06-14 13:54:10,008 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 183 selfloop transitions, 172 changer transitions 0/361 dead transitions. [2024-06-14 13:54:10,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 361 transitions, 5561 flow [2024-06-14 13:54:10,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:54:10,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:54:10,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-14 13:54:10,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5914634146341463 [2024-06-14 13:54:10,010 INFO L175 Difference]: Start difference. First operand has 285 places, 326 transitions, 4317 flow. Second operand 8 states and 194 transitions. [2024-06-14 13:54:10,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 361 transitions, 5561 flow [2024-06-14 13:54:11,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 361 transitions, 5307 flow, removed 0 selfloop flow, removed 11 redundant places. [2024-06-14 13:54:11,597 INFO L231 Difference]: Finished difference. Result has 282 places, 330 transitions, 4568 flow [2024-06-14 13:54:11,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4063, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4568, PETRI_PLACES=282, PETRI_TRANSITIONS=330} [2024-06-14 13:54:11,598 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 240 predicate places. [2024-06-14 13:54:11,598 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 330 transitions, 4568 flow [2024-06-14 13:54:11,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:11,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:11,598 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:54:11,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-14 13:54:11,599 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:54:11,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:11,599 INFO L85 PathProgramCache]: Analyzing trace with hash 588802096, now seen corresponding path program 4 times [2024-06-14 13:54:11,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:11,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111212062] [2024-06-14 13:54:11,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:11,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:11,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:11,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:11,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:11,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111212062] [2024-06-14 13:54:11,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111212062] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:11,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:11,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:54:11,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378810685] [2024-06-14 13:54:11,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:11,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:54:11,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:11,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:54:11,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:54:11,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:11,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 330 transitions, 4568 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:11,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:11,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:11,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:12,717 INFO L124 PetriNetUnfolderBase]: 3530/6136 cut-off events. [2024-06-14 13:54:12,717 INFO L125 PetriNetUnfolderBase]: For 524994/524996 co-relation queries the response was YES. [2024-06-14 13:54:12,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42869 conditions, 6136 events. 3530/6136 cut-off events. For 524994/524996 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 43341 event pairs, 1330 based on Foata normal form. 2/6133 useless extension candidates. Maximal degree in co-relation 42728. Up to 5270 conditions per place. [2024-06-14 13:54:12,791 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 180 selfloop transitions, 169 changer transitions 0/355 dead transitions. [2024-06-14 13:54:12,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 355 transitions, 5548 flow [2024-06-14 13:54:12,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:54:12,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:54:12,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-14 13:54:12,792 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5670731707317073 [2024-06-14 13:54:12,793 INFO L175 Difference]: Start difference. First operand has 282 places, 330 transitions, 4568 flow. Second operand 8 states and 186 transitions. [2024-06-14 13:54:12,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 355 transitions, 5548 flow [2024-06-14 13:54:14,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 355 transitions, 5098 flow, removed 59 selfloop flow, removed 5 redundant places. [2024-06-14 13:54:14,207 INFO L231 Difference]: Finished difference. Result has 285 places, 332 transitions, 4545 flow [2024-06-14 13:54:14,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4140, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4545, PETRI_PLACES=285, PETRI_TRANSITIONS=332} [2024-06-14 13:54:14,208 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 243 predicate places. [2024-06-14 13:54:14,208 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 332 transitions, 4545 flow [2024-06-14 13:54:14,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:14,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:14,208 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:54:14,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-14 13:54:14,208 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:54:14,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:14,209 INFO L85 PathProgramCache]: Analyzing trace with hash -1002931906, now seen corresponding path program 5 times [2024-06-14 13:54:14,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:14,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740201737] [2024-06-14 13:54:14,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:14,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:14,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:14,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:14,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:14,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740201737] [2024-06-14 13:54:14,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740201737] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:14,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:14,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:54:14,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261023587] [2024-06-14 13:54:14,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:14,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:54:14,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:14,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:54:14,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:54:14,412 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:14,412 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 332 transitions, 4545 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:14,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:14,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:14,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:15,425 INFO L124 PetriNetUnfolderBase]: 3757/6492 cut-off events. [2024-06-14 13:54:15,426 INFO L125 PetriNetUnfolderBase]: For 655692/655694 co-relation queries the response was YES. [2024-06-14 13:54:15,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48060 conditions, 6492 events. 3757/6492 cut-off events. For 655692/655694 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 46154 event pairs, 1254 based on Foata normal form. 2/6485 useless extension candidates. Maximal degree in co-relation 47918. Up to 4787 conditions per place. [2024-06-14 13:54:15,507 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 175 selfloop transitions, 194 changer transitions 0/375 dead transitions. [2024-06-14 13:54:15,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 375 transitions, 6061 flow [2024-06-14 13:54:15,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:54:15,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:54:15,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-14 13:54:15,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-14 13:54:15,508 INFO L175 Difference]: Start difference. First operand has 285 places, 332 transitions, 4545 flow. Second operand 8 states and 200 transitions. [2024-06-14 13:54:15,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 375 transitions, 6061 flow [2024-06-14 13:54:17,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 375 transitions, 5676 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-14 13:54:17,011 INFO L231 Difference]: Finished difference. Result has 287 places, 337 transitions, 4755 flow [2024-06-14 13:54:17,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4160, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=191, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4755, PETRI_PLACES=287, PETRI_TRANSITIONS=337} [2024-06-14 13:54:17,012 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 245 predicate places. [2024-06-14 13:54:17,012 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 337 transitions, 4755 flow [2024-06-14 13:54:17,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:17,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:17,012 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:54:17,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-14 13:54:17,012 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:54:17,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:17,013 INFO L85 PathProgramCache]: Analyzing trace with hash -991504066, now seen corresponding path program 6 times [2024-06-14 13:54:17,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:17,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321302794] [2024-06-14 13:54:17,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:17,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:17,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:17,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:17,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:17,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321302794] [2024-06-14 13:54:17,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321302794] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:17,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:17,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:54:17,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036528114] [2024-06-14 13:54:17,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:17,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:54:17,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:17,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:54:17,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:54:17,227 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:17,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 337 transitions, 4755 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:17,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:17,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:17,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:18,356 INFO L124 PetriNetUnfolderBase]: 3765/6500 cut-off events. [2024-06-14 13:54:18,357 INFO L125 PetriNetUnfolderBase]: For 677293/677295 co-relation queries the response was YES. [2024-06-14 13:54:18,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48719 conditions, 6500 events. 3765/6500 cut-off events. For 677293/677295 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 46214 event pairs, 1259 based on Foata normal form. 2/6493 useless extension candidates. Maximal degree in co-relation 48576. Up to 4795 conditions per place. [2024-06-14 13:54:18,429 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 172 selfloop transitions, 195 changer transitions 0/373 dead transitions. [2024-06-14 13:54:18,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 373 transitions, 5997 flow [2024-06-14 13:54:18,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:54:18,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:54:18,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-14 13:54:18,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5975609756097561 [2024-06-14 13:54:18,431 INFO L175 Difference]: Start difference. First operand has 287 places, 337 transitions, 4755 flow. Second operand 8 states and 196 transitions. [2024-06-14 13:54:18,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 373 transitions, 5997 flow [2024-06-14 13:54:20,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 373 transitions, 5645 flow, removed 69 selfloop flow, removed 3 redundant places. [2024-06-14 13:54:20,276 INFO L231 Difference]: Finished difference. Result has 292 places, 339 transitions, 4880 flow [2024-06-14 13:54:20,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4427, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=193, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4880, PETRI_PLACES=292, PETRI_TRANSITIONS=339} [2024-06-14 13:54:20,277 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 250 predicate places. [2024-06-14 13:54:20,277 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 339 transitions, 4880 flow [2024-06-14 13:54:20,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:20,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:20,277 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:54:20,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-14 13:54:20,278 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:54:20,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:20,278 INFO L85 PathProgramCache]: Analyzing trace with hash 1745463614, now seen corresponding path program 7 times [2024-06-14 13:54:20,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:20,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236684983] [2024-06-14 13:54:20,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:20,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:20,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:20,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:20,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:20,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236684983] [2024-06-14 13:54:20,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236684983] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:20,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:20,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:54:20,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807556577] [2024-06-14 13:54:20,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:20,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:54:20,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:20,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:54:20,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:54:20,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:20,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 339 transitions, 4880 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:20,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:20,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:20,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:21,573 INFO L124 PetriNetUnfolderBase]: 3773/6515 cut-off events. [2024-06-14 13:54:21,574 INFO L125 PetriNetUnfolderBase]: For 688235/688237 co-relation queries the response was YES. [2024-06-14 13:54:21,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49041 conditions, 6515 events. 3773/6515 cut-off events. For 688235/688237 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 46377 event pairs, 1447 based on Foata normal form. 2/6512 useless extension candidates. Maximal degree in co-relation 48896. Up to 5651 conditions per place. [2024-06-14 13:54:21,658 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 187 selfloop transitions, 168 changer transitions 0/361 dead transitions. [2024-06-14 13:54:21,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 361 transitions, 5860 flow [2024-06-14 13:54:21,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:54:21,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:54:21,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-14 13:54:21,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5579268292682927 [2024-06-14 13:54:21,659 INFO L175 Difference]: Start difference. First operand has 292 places, 339 transitions, 4880 flow. Second operand 8 states and 183 transitions. [2024-06-14 13:54:21,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 361 transitions, 5860 flow [2024-06-14 13:54:23,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 361 transitions, 5472 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-14 13:54:23,470 INFO L231 Difference]: Finished difference. Result has 295 places, 341 transitions, 4907 flow [2024-06-14 13:54:23,470 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4494, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4907, PETRI_PLACES=295, PETRI_TRANSITIONS=341} [2024-06-14 13:54:23,470 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 253 predicate places. [2024-06-14 13:54:23,471 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 341 transitions, 4907 flow [2024-06-14 13:54:23,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:23,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:23,471 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:54:23,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-14 13:54:23,471 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:54:23,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:23,471 INFO L85 PathProgramCache]: Analyzing trace with hash 424413710, now seen corresponding path program 8 times [2024-06-14 13:54:23,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:23,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163630985] [2024-06-14 13:54:23,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:23,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:23,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:23,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:23,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:23,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163630985] [2024-06-14 13:54:23,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163630985] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:23,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:23,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:54:23,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896205880] [2024-06-14 13:54:23,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:23,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:54:23,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:23,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:54:23,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:54:23,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:23,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 341 transitions, 4907 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:23,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:23,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:23,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:24,699 INFO L124 PetriNetUnfolderBase]: 3781/6529 cut-off events. [2024-06-14 13:54:24,700 INFO L125 PetriNetUnfolderBase]: For 703996/703998 co-relation queries the response was YES. [2024-06-14 13:54:24,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49158 conditions, 6529 events. 3781/6529 cut-off events. For 703996/703998 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 46452 event pairs, 1427 based on Foata normal form. 2/6524 useless extension candidates. Maximal degree in co-relation 49012. Up to 5605 conditions per place. [2024-06-14 13:54:24,787 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 186 selfloop transitions, 175 changer transitions 0/367 dead transitions. [2024-06-14 13:54:24,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 367 transitions, 5919 flow [2024-06-14 13:54:24,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:54:24,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:54:24,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-14 13:54:24,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5701219512195121 [2024-06-14 13:54:24,789 INFO L175 Difference]: Start difference. First operand has 295 places, 341 transitions, 4907 flow. Second operand 8 states and 187 transitions. [2024-06-14 13:54:24,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 367 transitions, 5919 flow [2024-06-14 13:54:26,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 367 transitions, 5532 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-14 13:54:26,648 INFO L231 Difference]: Finished difference. Result has 297 places, 343 transitions, 4939 flow [2024-06-14 13:54:26,648 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4520, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4939, PETRI_PLACES=297, PETRI_TRANSITIONS=343} [2024-06-14 13:54:26,648 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 255 predicate places. [2024-06-14 13:54:26,648 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 343 transitions, 4939 flow [2024-06-14 13:54:26,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:26,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:26,649 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:54:26,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-14 13:54:26,649 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:54:26,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:26,649 INFO L85 PathProgramCache]: Analyzing trace with hash -1206006141, now seen corresponding path program 5 times [2024-06-14 13:54:26,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:26,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073596379] [2024-06-14 13:54:26,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:26,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:26,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:26,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:26,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:26,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073596379] [2024-06-14 13:54:26,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073596379] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:26,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:26,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:54:26,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465219053] [2024-06-14 13:54:26,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:26,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:54:26,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:26,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:54:26,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:54:26,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:26,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 343 transitions, 4939 flow. Second operand has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:26,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:26,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:26,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:27,894 INFO L124 PetriNetUnfolderBase]: 3786/6553 cut-off events. [2024-06-14 13:54:27,895 INFO L125 PetriNetUnfolderBase]: For 719544/719548 co-relation queries the response was YES. [2024-06-14 13:54:27,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49447 conditions, 6553 events. 3786/6553 cut-off events. For 719544/719548 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 46694 event pairs, 1446 based on Foata normal form. 3/6550 useless extension candidates. Maximal degree in co-relation 49300. Up to 5675 conditions per place. [2024-06-14 13:54:27,974 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 210 selfloop transitions, 153 changer transitions 0/369 dead transitions. [2024-06-14 13:54:27,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 369 transitions, 6085 flow [2024-06-14 13:54:27,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:54:27,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:54:27,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 184 transitions. [2024-06-14 13:54:27,975 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-14 13:54:27,975 INFO L175 Difference]: Start difference. First operand has 297 places, 343 transitions, 4939 flow. Second operand 8 states and 184 transitions. [2024-06-14 13:54:27,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 369 transitions, 6085 flow [2024-06-14 13:54:30,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 369 transitions, 5682 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-14 13:54:30,297 INFO L231 Difference]: Finished difference. Result has 299 places, 346 transitions, 4900 flow [2024-06-14 13:54:30,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4542, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4900, PETRI_PLACES=299, PETRI_TRANSITIONS=346} [2024-06-14 13:54:30,298 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 257 predicate places. [2024-06-14 13:54:30,298 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 346 transitions, 4900 flow [2024-06-14 13:54:30,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:30,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:30,298 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:54:30,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-14 13:54:30,298 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:54:30,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:30,299 INFO L85 PathProgramCache]: Analyzing trace with hash 430795713, now seen corresponding path program 6 times [2024-06-14 13:54:30,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:30,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510443067] [2024-06-14 13:54:30,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:30,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:30,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:30,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:30,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:30,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510443067] [2024-06-14 13:54:30,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510443067] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:30,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:30,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:54:30,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238516172] [2024-06-14 13:54:30,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:30,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:54:30,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:30,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:54:30,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:54:30,530 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:30,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 346 transitions, 4900 flow. Second operand has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:30,531 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:30,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:30,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:31,635 INFO L124 PetriNetUnfolderBase]: 3799/6581 cut-off events. [2024-06-14 13:54:31,636 INFO L125 PetriNetUnfolderBase]: For 737633/737637 co-relation queries the response was YES. [2024-06-14 13:54:31,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49737 conditions, 6581 events. 3799/6581 cut-off events. For 737633/737637 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 46981 event pairs, 1450 based on Foata normal form. 3/6580 useless extension candidates. Maximal degree in co-relation 49589. Up to 5690 conditions per place. [2024-06-14 13:54:31,720 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 212 selfloop transitions, 157 changer transitions 0/375 dead transitions. [2024-06-14 13:54:31,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 375 transitions, 6270 flow [2024-06-14 13:54:31,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:54:31,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:54:31,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 217 transitions. [2024-06-14 13:54:31,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5292682926829269 [2024-06-14 13:54:31,721 INFO L175 Difference]: Start difference. First operand has 299 places, 346 transitions, 4900 flow. Second operand 10 states and 217 transitions. [2024-06-14 13:54:31,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 375 transitions, 6270 flow [2024-06-14 13:54:33,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 375 transitions, 5930 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-14 13:54:33,400 INFO L231 Difference]: Finished difference. Result has 303 places, 352 transitions, 4984 flow [2024-06-14 13:54:33,400 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4572, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4984, PETRI_PLACES=303, PETRI_TRANSITIONS=352} [2024-06-14 13:54:33,401 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 261 predicate places. [2024-06-14 13:54:33,401 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 352 transitions, 4984 flow [2024-06-14 13:54:33,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:33,401 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:33,401 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] [2024-06-14 13:54:33,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-14 13:54:33,401 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:54:33,402 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:33,402 INFO L85 PathProgramCache]: Analyzing trace with hash -198187685, now seen corresponding path program 7 times [2024-06-14 13:54:33,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:33,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319124191] [2024-06-14 13:54:33,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:33,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:33,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:33,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:33,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:33,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319124191] [2024-06-14 13:54:33,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319124191] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:33,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:33,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:54:33,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113338443] [2024-06-14 13:54:33,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:33,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:54:33,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:33,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:54:33,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:54:33,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:33,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 352 transitions, 4984 flow. Second operand has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:33,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:33,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:33,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:34,695 INFO L124 PetriNetUnfolderBase]: 3796/6577 cut-off events. [2024-06-14 13:54:34,695 INFO L125 PetriNetUnfolderBase]: For 751940/751944 co-relation queries the response was YES. [2024-06-14 13:54:34,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49819 conditions, 6577 events. 3796/6577 cut-off events. For 751940/751944 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 46995 event pairs, 1450 based on Foata normal form. 3/6576 useless extension candidates. Maximal degree in co-relation 49670. Up to 5687 conditions per place. [2024-06-14 13:54:34,781 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 210 selfloop transitions, 156 changer transitions 0/372 dead transitions. [2024-06-14 13:54:34,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 372 transitions, 6084 flow [2024-06-14 13:54:34,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:54:34,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:54:34,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-14 13:54:34,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5548780487804879 [2024-06-14 13:54:34,782 INFO L175 Difference]: Start difference. First operand has 303 places, 352 transitions, 4984 flow. Second operand 8 states and 182 transitions. [2024-06-14 13:54:34,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 372 transitions, 6084 flow [2024-06-14 13:54:36,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 372 transitions, 5724 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-06-14 13:54:36,600 INFO L231 Difference]: Finished difference. Result has 304 places, 352 transitions, 4942 flow [2024-06-14 13:54:36,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4624, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4942, PETRI_PLACES=304, PETRI_TRANSITIONS=352} [2024-06-14 13:54:36,602 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 262 predicate places. [2024-06-14 13:54:36,602 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 352 transitions, 4942 flow [2024-06-14 13:54:36,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:36,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:36,603 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:54:36,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-14 13:54:36,603 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:54:36,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:36,603 INFO L85 PathProgramCache]: Analyzing trace with hash 1951886099, now seen corresponding path program 8 times [2024-06-14 13:54:36,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:36,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990111506] [2024-06-14 13:54:36,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:36,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:36,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:36,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:36,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:36,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990111506] [2024-06-14 13:54:36,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990111506] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:36,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:36,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:54:36,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048316745] [2024-06-14 13:54:36,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:36,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:54:36,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:36,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:54:36,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:54:36,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:36,791 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 352 transitions, 4942 flow. Second operand has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:36,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:36,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:36,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:37,880 INFO L124 PetriNetUnfolderBase]: 3801/6588 cut-off events. [2024-06-14 13:54:37,880 INFO L125 PetriNetUnfolderBase]: For 769592/769596 co-relation queries the response was YES. [2024-06-14 13:54:37,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50071 conditions, 6588 events. 3801/6588 cut-off events. For 769592/769596 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 47038 event pairs, 1462 based on Foata normal form. 3/6589 useless extension candidates. Maximal degree in co-relation 49921. Up to 5693 conditions per place. [2024-06-14 13:54:37,966 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 207 selfloop transitions, 160 changer transitions 0/373 dead transitions. [2024-06-14 13:54:37,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 373 transitions, 6256 flow [2024-06-14 13:54:37,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:54:37,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:54:37,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 179 transitions. [2024-06-14 13:54:37,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5457317073170732 [2024-06-14 13:54:37,967 INFO L175 Difference]: Start difference. First operand has 304 places, 352 transitions, 4942 flow. Second operand 8 states and 179 transitions. [2024-06-14 13:54:37,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 373 transitions, 6256 flow [2024-06-14 13:54:39,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 373 transitions, 5938 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-14 13:54:39,947 INFO L231 Difference]: Finished difference. Result has 305 places, 355 transitions, 5002 flow [2024-06-14 13:54:39,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4630, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5002, PETRI_PLACES=305, PETRI_TRANSITIONS=355} [2024-06-14 13:54:39,948 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 263 predicate places. [2024-06-14 13:54:39,948 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 355 transitions, 5002 flow [2024-06-14 13:54:39,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:39,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:39,948 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:54:39,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-14 13:54:39,948 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:54:39,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:39,949 INFO L85 PathProgramCache]: Analyzing trace with hash -2100946493, now seen corresponding path program 9 times [2024-06-14 13:54:39,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:39,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608384681] [2024-06-14 13:54:39,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:39,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:39,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:40,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:40,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:40,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608384681] [2024-06-14 13:54:40,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608384681] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:40,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:40,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:54:40,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931716884] [2024-06-14 13:54:40,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:40,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:54:40,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:40,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:54:40,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:54:40,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:40,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 355 transitions, 5002 flow. Second operand has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:40,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:40,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:40,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:41,237 INFO L124 PetriNetUnfolderBase]: 3806/6589 cut-off events. [2024-06-14 13:54:41,238 INFO L125 PetriNetUnfolderBase]: For 789326/789330 co-relation queries the response was YES. [2024-06-14 13:54:41,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50356 conditions, 6589 events. 3806/6589 cut-off events. For 789326/789330 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 47032 event pairs, 1471 based on Foata normal form. 3/6586 useless extension candidates. Maximal degree in co-relation 50205. Up to 5699 conditions per place. [2024-06-14 13:54:41,321 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 208 selfloop transitions, 164 changer transitions 0/378 dead transitions. [2024-06-14 13:54:41,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 378 transitions, 6336 flow [2024-06-14 13:54:41,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:54:41,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:54:41,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 211 transitions. [2024-06-14 13:54:41,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5146341463414634 [2024-06-14 13:54:41,332 INFO L175 Difference]: Start difference. First operand has 305 places, 355 transitions, 5002 flow. Second operand 10 states and 211 transitions. [2024-06-14 13:54:41,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 378 transitions, 6336 flow [2024-06-14 13:54:43,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 378 transitions, 6019 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-14 13:54:43,387 INFO L231 Difference]: Finished difference. Result has 310 places, 358 transitions, 5071 flow [2024-06-14 13:54:43,387 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4698, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5071, PETRI_PLACES=310, PETRI_TRANSITIONS=358} [2024-06-14 13:54:43,387 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 268 predicate places. [2024-06-14 13:54:43,387 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 358 transitions, 5071 flow [2024-06-14 13:54:43,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:43,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:43,388 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:54:43,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-14 13:54:43,388 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:54:43,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:43,388 INFO L85 PathProgramCache]: Analyzing trace with hash -2100935333, now seen corresponding path program 10 times [2024-06-14 13:54:43,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:43,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055015929] [2024-06-14 13:54:43,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:43,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:43,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:43,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:43,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:43,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055015929] [2024-06-14 13:54:43,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055015929] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:43,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:43,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:54:43,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527522947] [2024-06-14 13:54:43,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:43,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:54:43,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:43,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:54:43,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:54:43,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:43,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 358 transitions, 5071 flow. Second operand has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:43,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:43,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:43,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:44,648 INFO L124 PetriNetUnfolderBase]: 3803/6589 cut-off events. [2024-06-14 13:54:44,648 INFO L125 PetriNetUnfolderBase]: For 802481/802485 co-relation queries the response was YES. [2024-06-14 13:54:44,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50455 conditions, 6589 events. 3803/6589 cut-off events. For 802481/802485 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 47089 event pairs, 1475 based on Foata normal form. 3/6586 useless extension candidates. Maximal degree in co-relation 50303. Up to 5696 conditions per place. [2024-06-14 13:54:44,732 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 206 selfloop transitions, 163 changer transitions 0/375 dead transitions. [2024-06-14 13:54:44,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 375 transitions, 6181 flow [2024-06-14 13:54:44,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:54:44,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:54:44,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 178 transitions. [2024-06-14 13:54:44,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5426829268292683 [2024-06-14 13:54:44,734 INFO L175 Difference]: Start difference. First operand has 310 places, 358 transitions, 5071 flow. Second operand 8 states and 178 transitions. [2024-06-14 13:54:44,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 375 transitions, 6181 flow [2024-06-14 13:54:46,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 375 transitions, 5604 flow, removed 12 selfloop flow, removed 10 redundant places. [2024-06-14 13:54:46,875 INFO L231 Difference]: Finished difference. Result has 308 places, 358 transitions, 4826 flow [2024-06-14 13:54:46,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4494, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4826, PETRI_PLACES=308, PETRI_TRANSITIONS=358} [2024-06-14 13:54:46,875 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 266 predicate places. [2024-06-14 13:54:46,876 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 358 transitions, 4826 flow [2024-06-14 13:54:46,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:46,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:46,876 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] [2024-06-14 13:54:46,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-14 13:54:46,876 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:54:46,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:46,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1245795214, now seen corresponding path program 9 times [2024-06-14 13:54:46,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:46,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318671665] [2024-06-14 13:54:46,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:46,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:46,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:47,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:47,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:47,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318671665] [2024-06-14 13:54:47,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318671665] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:47,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:47,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:54:47,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735697280] [2024-06-14 13:54:47,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:47,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:54:47,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:47,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:54:47,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:54:47,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:47,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 358 transitions, 4826 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:47,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:47,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:47,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:48,242 INFO L124 PetriNetUnfolderBase]: 3839/6640 cut-off events. [2024-06-14 13:54:48,242 INFO L125 PetriNetUnfolderBase]: For 855010/855012 co-relation queries the response was YES. [2024-06-14 13:54:48,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51100 conditions, 6640 events. 3839/6640 cut-off events. For 855010/855012 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 47387 event pairs, 1423 based on Foata normal form. 10/6647 useless extension candidates. Maximal degree in co-relation 50949. Up to 5976 conditions per place. [2024-06-14 13:54:48,319 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 327 selfloop transitions, 48 changer transitions 0/381 dead transitions. [2024-06-14 13:54:48,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 381 transitions, 5725 flow [2024-06-14 13:54:48,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:54:48,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:54:48,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 194 transitions. [2024-06-14 13:54:48,320 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5257452574525745 [2024-06-14 13:54:48,320 INFO L175 Difference]: Start difference. First operand has 308 places, 358 transitions, 4826 flow. Second operand 9 states and 194 transitions. [2024-06-14 13:54:48,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 381 transitions, 5725 flow [2024-06-14 13:54:50,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 381 transitions, 5399 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-14 13:54:50,397 INFO L231 Difference]: Finished difference. Result has 310 places, 360 transitions, 4678 flow [2024-06-14 13:54:50,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4500, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4678, PETRI_PLACES=310, PETRI_TRANSITIONS=360} [2024-06-14 13:54:50,398 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 268 predicate places. [2024-06-14 13:54:50,398 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 360 transitions, 4678 flow [2024-06-14 13:54:50,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:50,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:50,398 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:54:50,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-14 13:54:50,398 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:54:50,399 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:50,399 INFO L85 PathProgramCache]: Analyzing trace with hash -449921616, now seen corresponding path program 10 times [2024-06-14 13:54:50,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:50,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727688217] [2024-06-14 13:54:50,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:50,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:50,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:50,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:50,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:50,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727688217] [2024-06-14 13:54:50,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727688217] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:50,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:50,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:54:50,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382574901] [2024-06-14 13:54:50,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:50,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:54:50,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:50,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:54:50,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:54:50,689 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:50,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 360 transitions, 4678 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:50,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:50,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:50,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:51,897 INFO L124 PetriNetUnfolderBase]: 3921/6750 cut-off events. [2024-06-14 13:54:51,898 INFO L125 PetriNetUnfolderBase]: For 907729/907731 co-relation queries the response was YES. [2024-06-14 13:54:51,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52900 conditions, 6750 events. 3921/6750 cut-off events. For 907729/907731 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 48204 event pairs, 1419 based on Foata normal form. 10/6751 useless extension candidates. Maximal degree in co-relation 52748. Up to 5934 conditions per place. [2024-06-14 13:54:51,989 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 329 selfloop transitions, 54 changer transitions 2/391 dead transitions. [2024-06-14 13:54:51,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 391 transitions, 5838 flow [2024-06-14 13:54:51,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:54:51,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:54:51,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 200 transitions. [2024-06-14 13:54:51,991 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5420054200542005 [2024-06-14 13:54:51,991 INFO L175 Difference]: Start difference. First operand has 310 places, 360 transitions, 4678 flow. Second operand 9 states and 200 transitions. [2024-06-14 13:54:51,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 391 transitions, 5838 flow [2024-06-14 13:54:54,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 391 transitions, 5694 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-14 13:54:54,686 INFO L231 Difference]: Finished difference. Result has 313 places, 363 transitions, 4768 flow [2024-06-14 13:54:54,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4534, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4768, PETRI_PLACES=313, PETRI_TRANSITIONS=363} [2024-06-14 13:54:54,686 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 271 predicate places. [2024-06-14 13:54:54,686 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 363 transitions, 4768 flow [2024-06-14 13:54:54,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:54,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:54,687 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:54:54,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-14 13:54:54,687 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:54:54,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:54,687 INFO L85 PathProgramCache]: Analyzing trace with hash 1042909146, now seen corresponding path program 1 times [2024-06-14 13:54:54,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:54,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850553692] [2024-06-14 13:54:54,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:54,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:54,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:54,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:54,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:54,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850553692] [2024-06-14 13:54:54,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850553692] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:54,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:54,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:54:54,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410428594] [2024-06-14 13:54:54,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:54,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:54:54,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:54,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:54:54,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:54:54,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:54,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 363 transitions, 4768 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:54,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:54,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:54,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:56,061 INFO L124 PetriNetUnfolderBase]: 3957/6808 cut-off events. [2024-06-14 13:54:56,061 INFO L125 PetriNetUnfolderBase]: For 929128/929130 co-relation queries the response was YES. [2024-06-14 13:54:56,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53586 conditions, 6808 events. 3957/6808 cut-off events. For 929128/929130 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 48644 event pairs, 1443 based on Foata normal form. 10/6815 useless extension candidates. Maximal degree in co-relation 53432. Up to 6158 conditions per place. [2024-06-14 13:54:56,154 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 329 selfloop transitions, 47 changer transitions 4/386 dead transitions. [2024-06-14 13:54:56,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 386 transitions, 5652 flow [2024-06-14 13:54:56,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:54:56,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:54:56,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 194 transitions. [2024-06-14 13:54:56,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5257452574525745 [2024-06-14 13:54:56,155 INFO L175 Difference]: Start difference. First operand has 313 places, 363 transitions, 4768 flow. Second operand 9 states and 194 transitions. [2024-06-14 13:54:56,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 386 transitions, 5652 flow [2024-06-14 13:54:59,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 386 transitions, 5513 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-14 13:54:59,498 INFO L231 Difference]: Finished difference. Result has 316 places, 364 transitions, 4766 flow [2024-06-14 13:54:59,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4629, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4766, PETRI_PLACES=316, PETRI_TRANSITIONS=364} [2024-06-14 13:54:59,498 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 274 predicate places. [2024-06-14 13:54:59,499 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 364 transitions, 4766 flow [2024-06-14 13:54:59,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:59,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:59,499 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:54:59,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-14 13:54:59,499 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:54:59,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:59,499 INFO L85 PathProgramCache]: Analyzing trace with hash 1057193946, now seen corresponding path program 2 times [2024-06-14 13:54:59,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:59,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867668302] [2024-06-14 13:54:59,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:59,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:59,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:59,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:59,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:59,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867668302] [2024-06-14 13:54:59,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867668302] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:59,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:59,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:54:59,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626952995] [2024-06-14 13:54:59,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:59,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:54:59,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:59,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:54:59,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:54:59,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:59,749 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 364 transitions, 4766 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:59,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:59,749 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:59,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:55:00,917 INFO L124 PetriNetUnfolderBase]: 4029/6892 cut-off events. [2024-06-14 13:55:00,917 INFO L125 PetriNetUnfolderBase]: For 982691/982693 co-relation queries the response was YES. [2024-06-14 13:55:00,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55255 conditions, 6892 events. 4029/6892 cut-off events. For 982691/982693 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 48898 event pairs, 1427 based on Foata normal form. 10/6899 useless extension candidates. Maximal degree in co-relation 55100. Up to 6112 conditions per place. [2024-06-14 13:55:01,009 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 332 selfloop transitions, 50 changer transitions 7/395 dead transitions. [2024-06-14 13:55:01,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 395 transitions, 5924 flow [2024-06-14 13:55:01,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:55:01,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:55:01,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 200 transitions. [2024-06-14 13:55:01,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5420054200542005 [2024-06-14 13:55:01,010 INFO L175 Difference]: Start difference. First operand has 316 places, 364 transitions, 4766 flow. Second operand 9 states and 200 transitions. [2024-06-14 13:55:01,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 395 transitions, 5924 flow [2024-06-14 13:55:04,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 395 transitions, 5803 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-14 13:55:04,562 INFO L231 Difference]: Finished difference. Result has 319 places, 365 transitions, 4801 flow [2024-06-14 13:55:04,562 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4645, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4801, PETRI_PLACES=319, PETRI_TRANSITIONS=365} [2024-06-14 13:55:04,562 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 277 predicate places. [2024-06-14 13:55:04,562 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 365 transitions, 4801 flow [2024-06-14 13:55:04,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:04,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:55:04,563 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:55:04,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-14 13:55:04,563 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:55:04,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:55:04,563 INFO L85 PathProgramCache]: Analyzing trace with hash 1042901985, now seen corresponding path program 11 times [2024-06-14 13:55:04,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:55:04,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597733408] [2024-06-14 13:55:04,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:55:04,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:55:04,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:55:04,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:55:04,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:55:04,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597733408] [2024-06-14 13:55:04,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597733408] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:55:04,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:55:04,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:55:04,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442733940] [2024-06-14 13:55:04,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:55:04,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:55:04,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:55:04,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:55:04,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:55:04,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:55:04,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 365 transitions, 4801 flow. Second operand has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:04,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:55:04,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:55:04,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:55:06,030 INFO L124 PetriNetUnfolderBase]: 3948/6816 cut-off events. [2024-06-14 13:55:06,030 INFO L125 PetriNetUnfolderBase]: For 966266/966270 co-relation queries the response was YES. [2024-06-14 13:55:06,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54686 conditions, 6816 events. 3948/6816 cut-off events. For 966266/966270 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 48790 event pairs, 1459 based on Foata normal form. 3/6817 useless extension candidates. Maximal degree in co-relation 54529. Up to 6007 conditions per place. [2024-06-14 13:55:06,115 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 275 selfloop transitions, 104 changer transitions 0/385 dead transitions. [2024-06-14 13:55:06,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 385 transitions, 5988 flow [2024-06-14 13:55:06,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:55:06,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:55:06,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-14 13:55:06,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487804878048781 [2024-06-14 13:55:06,116 INFO L175 Difference]: Start difference. First operand has 319 places, 365 transitions, 4801 flow. Second operand 8 states and 180 transitions. [2024-06-14 13:55:06,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 385 transitions, 5988 flow [2024-06-14 13:55:08,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 385 transitions, 5852 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-14 13:55:08,970 INFO L231 Difference]: Finished difference. Result has 321 places, 368 transitions, 4919 flow [2024-06-14 13:55:08,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4665, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4919, PETRI_PLACES=321, PETRI_TRANSITIONS=368} [2024-06-14 13:55:08,970 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 279 predicate places. [2024-06-14 13:55:08,970 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 368 transitions, 4919 flow [2024-06-14 13:55:08,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:08,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:55:08,971 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:55:08,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-14 13:55:08,971 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:55:08,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:55:08,971 INFO L85 PathProgramCache]: Analyzing trace with hash 1245799771, now seen corresponding path program 12 times [2024-06-14 13:55:08,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:55:08,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000453294] [2024-06-14 13:55:08,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:55:08,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:55:08,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:55:09,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:55:09,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:55:09,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000453294] [2024-06-14 13:55:09,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000453294] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:55:09,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:55:09,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:55:09,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140612301] [2024-06-14 13:55:09,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:55:09,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:55:09,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:55:09,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:55:09,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:55:09,174 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:55:09,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 368 transitions, 4919 flow. Second operand has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:09,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:55:09,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:55:09,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:55:10,367 INFO L124 PetriNetUnfolderBase]: 3953/6821 cut-off events. [2024-06-14 13:55:10,368 INFO L125 PetriNetUnfolderBase]: For 987853/987857 co-relation queries the response was YES. [2024-06-14 13:55:10,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54938 conditions, 6821 events. 3953/6821 cut-off events. For 987853/987857 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 48890 event pairs, 1456 based on Foata normal form. 3/6822 useless extension candidates. Maximal degree in co-relation 54780. Up to 6013 conditions per place. [2024-06-14 13:55:10,463 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 281 selfloop transitions, 104 changer transitions 0/391 dead transitions. [2024-06-14 13:55:10,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 391 transitions, 6141 flow [2024-06-14 13:55:10,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:55:10,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:55:10,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-14 13:55:10,464 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5579268292682927 [2024-06-14 13:55:10,464 INFO L175 Difference]: Start difference. First operand has 321 places, 368 transitions, 4919 flow. Second operand 8 states and 183 transitions. [2024-06-14 13:55:10,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 391 transitions, 6141 flow [2024-06-14 13:55:13,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 391 transitions, 5951 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-14 13:55:13,440 INFO L231 Difference]: Finished difference. Result has 324 places, 371 transitions, 4992 flow [2024-06-14 13:55:13,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4735, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4992, PETRI_PLACES=324, PETRI_TRANSITIONS=371} [2024-06-14 13:55:13,441 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 282 predicate places. [2024-06-14 13:55:13,441 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 371 transitions, 4992 flow [2024-06-14 13:55:13,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:13,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:55:13,441 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] [2024-06-14 13:55:13,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-14 13:55:13,441 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:55:13,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:55:13,442 INFO L85 PathProgramCache]: Analyzing trace with hash 1417563331, now seen corresponding path program 13 times [2024-06-14 13:55:13,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:55:13,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62694511] [2024-06-14 13:55:13,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:55:13,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:55:13,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:55:13,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:55:13,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:55:13,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62694511] [2024-06-14 13:55:13,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62694511] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:55:13,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:55:13,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:55:13,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139189099] [2024-06-14 13:55:13,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:55:13,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:55:13,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:55:13,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:55:13,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:55:13,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:55:13,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 371 transitions, 4992 flow. Second operand has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:13,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:55:13,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:55:13,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:55:14,847 INFO L124 PetriNetUnfolderBase]: 3950/6817 cut-off events. [2024-06-14 13:55:14,847 INFO L125 PetriNetUnfolderBase]: For 1005060/1005064 co-relation queries the response was YES. [2024-06-14 13:55:14,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55075 conditions, 6817 events. 3950/6817 cut-off events. For 1005060/1005064 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 48847 event pairs, 1454 based on Foata normal form. 3/6818 useless extension candidates. Maximal degree in co-relation 54916. Up to 6010 conditions per place. [2024-06-14 13:55:14,947 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 270 selfloop transitions, 113 changer transitions 0/389 dead transitions. [2024-06-14 13:55:14,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 389 transitions, 5980 flow [2024-06-14 13:55:14,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:55:14,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:55:14,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 214 transitions. [2024-06-14 13:55:14,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5219512195121951 [2024-06-14 13:55:14,948 INFO L175 Difference]: Start difference. First operand has 324 places, 371 transitions, 4992 flow. Second operand 10 states and 214 transitions. [2024-06-14 13:55:14,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 389 transitions, 5980 flow [2024-06-14 13:55:18,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 389 transitions, 5653 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-14 13:55:18,254 INFO L231 Difference]: Finished difference. Result has 326 places, 371 transitions, 4897 flow [2024-06-14 13:55:18,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4665, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4897, PETRI_PLACES=326, PETRI_TRANSITIONS=371} [2024-06-14 13:55:18,254 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 284 predicate places. [2024-06-14 13:55:18,255 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 371 transitions, 4897 flow [2024-06-14 13:55:18,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:18,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:55:18,255 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:55:18,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-14 13:55:18,255 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:55:18,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:55:18,255 INFO L85 PathProgramCache]: Analyzing trace with hash 1245788611, now seen corresponding path program 14 times [2024-06-14 13:55:18,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:55:18,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807224861] [2024-06-14 13:55:18,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:55:18,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:55:18,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:55:18,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:55:18,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:55:18,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807224861] [2024-06-14 13:55:18,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807224861] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:55:18,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:55:18,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:55:18,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813205416] [2024-06-14 13:55:18,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:55:18,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:55:18,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:55:18,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:55:18,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:55:18,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:55:18,456 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 371 transitions, 4897 flow. Second operand has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:18,456 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:55:18,456 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:55:18,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:55:19,630 INFO L124 PetriNetUnfolderBase]: 3947/6813 cut-off events. [2024-06-14 13:55:19,630 INFO L125 PetriNetUnfolderBase]: For 1021566/1021570 co-relation queries the response was YES. [2024-06-14 13:55:19,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55009 conditions, 6813 events. 3947/6813 cut-off events. For 1021566/1021570 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 48790 event pairs, 1477 based on Foata normal form. 3/6814 useless extension candidates. Maximal degree in co-relation 54850. Up to 6007 conditions per place. [2024-06-14 13:55:19,730 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 281 selfloop transitions, 107 changer transitions 0/394 dead transitions. [2024-06-14 13:55:19,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 394 transitions, 5729 flow [2024-06-14 13:55:19,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:55:19,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:55:19,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 218 transitions. [2024-06-14 13:55:19,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5317073170731708 [2024-06-14 13:55:19,732 INFO L175 Difference]: Start difference. First operand has 326 places, 371 transitions, 4897 flow. Second operand 10 states and 218 transitions. [2024-06-14 13:55:19,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 394 transitions, 5729 flow [2024-06-14 13:55:22,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 394 transitions, 5385 flow, removed 2 selfloop flow, removed 12 redundant places. [2024-06-14 13:55:22,943 INFO L231 Difference]: Finished difference. Result has 324 places, 371 transitions, 4773 flow [2024-06-14 13:55:22,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4553, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4773, PETRI_PLACES=324, PETRI_TRANSITIONS=371} [2024-06-14 13:55:22,943 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 282 predicate places. [2024-06-14 13:55:22,943 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 371 transitions, 4773 flow [2024-06-14 13:55:22,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:22,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:55:22,944 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:55:22,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-14 13:55:22,944 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:55:22,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:55:22,945 INFO L85 PathProgramCache]: Analyzing trace with hash -494824818, now seen corresponding path program 11 times [2024-06-14 13:55:22,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:55:22,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557281315] [2024-06-14 13:55:22,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:55:22,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:55:22,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:55:23,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:55:23,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:55:23,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557281315] [2024-06-14 13:55:23,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557281315] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:55:23,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:55:23,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:55:23,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776448816] [2024-06-14 13:55:23,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:55:23,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:55:23,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:55:23,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:55:23,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:55:23,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:55:23,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 371 transitions, 4773 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:23,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:55:23,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:55:23,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:55:24,484 INFO L124 PetriNetUnfolderBase]: 3924/6770 cut-off events. [2024-06-14 13:55:24,484 INFO L125 PetriNetUnfolderBase]: For 1036824/1036826 co-relation queries the response was YES. [2024-06-14 13:55:24,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53935 conditions, 6770 events. 3924/6770 cut-off events. For 1036824/1036826 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 48436 event pairs, 1444 based on Foata normal form. 10/6777 useless extension candidates. Maximal degree in co-relation 53775. Up to 5880 conditions per place. [2024-06-14 13:55:24,566 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 267 selfloop transitions, 130 changer transitions 0/403 dead transitions. [2024-06-14 13:55:24,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 403 transitions, 5665 flow [2024-06-14 13:55:24,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:55:24,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:55:24,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 217 transitions. [2024-06-14 13:55:24,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5880758807588076 [2024-06-14 13:55:24,567 INFO L175 Difference]: Start difference. First operand has 324 places, 371 transitions, 4773 flow. Second operand 9 states and 217 transitions. [2024-06-14 13:55:24,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 403 transitions, 5665 flow [2024-06-14 13:55:27,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 403 transitions, 5352 flow, removed 21 selfloop flow, removed 10 redundant places. [2024-06-14 13:55:27,653 INFO L231 Difference]: Finished difference. Result has 323 places, 371 transitions, 4733 flow [2024-06-14 13:55:27,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4460, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4733, PETRI_PLACES=323, PETRI_TRANSITIONS=371} [2024-06-14 13:55:27,653 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 281 predicate places. [2024-06-14 13:55:27,653 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 371 transitions, 4733 flow [2024-06-14 13:55:27,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:27,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:55:27,654 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:55:27,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-14 13:55:27,654 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:55:27,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:55:27,654 INFO L85 PathProgramCache]: Analyzing trace with hash 2024109182, now seen corresponding path program 12 times [2024-06-14 13:55:27,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:55:27,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890222304] [2024-06-14 13:55:27,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:55:27,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:55:27,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:55:27,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:55:27,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:55:27,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890222304] [2024-06-14 13:55:27,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890222304] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:55:27,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:55:27,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:55:27,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388656030] [2024-06-14 13:55:27,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:55:27,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:55:27,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:55:27,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:55:27,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:55:27,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:55:27,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 371 transitions, 4733 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:27,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:55:27,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:55:27,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:55:29,090 INFO L124 PetriNetUnfolderBase]: 3901/6738 cut-off events. [2024-06-14 13:55:29,091 INFO L125 PetriNetUnfolderBase]: For 1012245/1012247 co-relation queries the response was YES. [2024-06-14 13:55:29,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52849 conditions, 6738 events. 3901/6738 cut-off events. For 1012245/1012247 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 48267 event pairs, 1244 based on Foata normal form. 10/6741 useless extension candidates. Maximal degree in co-relation 52688. Up to 5163 conditions per place. [2024-06-14 13:55:29,181 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 257 selfloop transitions, 147 changer transitions 0/410 dead transitions. [2024-06-14 13:55:29,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 410 transitions, 5867 flow [2024-06-14 13:55:29,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:55:29,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:55:29,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 223 transitions. [2024-06-14 13:55:29,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6043360433604336 [2024-06-14 13:55:29,182 INFO L175 Difference]: Start difference. First operand has 323 places, 371 transitions, 4733 flow. Second operand 9 states and 223 transitions. [2024-06-14 13:55:29,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 410 transitions, 5867 flow [2024-06-14 13:55:32,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 410 transitions, 5547 flow, removed 27 selfloop flow, removed 8 redundant places. [2024-06-14 13:55:32,738 INFO L231 Difference]: Finished difference. Result has 324 places, 371 transitions, 4720 flow [2024-06-14 13:55:32,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4415, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4720, PETRI_PLACES=324, PETRI_TRANSITIONS=371} [2024-06-14 13:55:32,739 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 282 predicate places. [2024-06-14 13:55:32,739 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 371 transitions, 4720 flow [2024-06-14 13:55:32,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:32,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:55:32,739 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:55:32,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-14 13:55:32,739 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:55:32,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:55:32,740 INFO L85 PathProgramCache]: Analyzing trace with hash -375603840, now seen corresponding path program 3 times [2024-06-14 13:55:32,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:55:32,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526474216] [2024-06-14 13:55:32,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:55:32,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:55:32,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:55:32,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:55:32,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:55:32,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526474216] [2024-06-14 13:55:32,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526474216] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:55:32,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:55:32,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:55:32,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894251663] [2024-06-14 13:55:32,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:55:32,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:55:32,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:55:32,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:55:32,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:55:32,975 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:55:32,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 371 transitions, 4720 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:32,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:55:32,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:55:32,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:55:34,130 INFO L124 PetriNetUnfolderBase]: 3937/6793 cut-off events. [2024-06-14 13:55:34,130 INFO L125 PetriNetUnfolderBase]: For 1011722/1011726 co-relation queries the response was YES. [2024-06-14 13:55:34,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53216 conditions, 6793 events. 3937/6793 cut-off events. For 1011722/1011726 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 48509 event pairs, 1453 based on Foata normal form. 12/6803 useless extension candidates. Maximal degree in co-relation 53054. Up to 5373 conditions per place. [2024-06-14 13:55:34,220 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 281 selfloop transitions, 112 changer transitions 0/399 dead transitions. [2024-06-14 13:55:34,220 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 399 transitions, 5845 flow [2024-06-14 13:55:34,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:55:34,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:55:34,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-14 13:55:34,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5701219512195121 [2024-06-14 13:55:34,221 INFO L175 Difference]: Start difference. First operand has 324 places, 371 transitions, 4720 flow. Second operand 8 states and 187 transitions. [2024-06-14 13:55:34,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 399 transitions, 5845 flow [2024-06-14 13:55:38,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 399 transitions, 5461 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-14 13:55:38,263 INFO L231 Difference]: Finished difference. Result has 323 places, 373 transitions, 4622 flow [2024-06-14 13:55:38,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4338, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4622, PETRI_PLACES=323, PETRI_TRANSITIONS=373} [2024-06-14 13:55:38,263 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 281 predicate places. [2024-06-14 13:55:38,263 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 373 transitions, 4622 flow [2024-06-14 13:55:38,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:38,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:55:38,264 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:55:38,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-14 13:55:38,264 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:55:38,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:55:38,264 INFO L85 PathProgramCache]: Analyzing trace with hash -339086106, now seen corresponding path program 4 times [2024-06-14 13:55:38,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:55:38,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457927235] [2024-06-14 13:55:38,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:55:38,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:55:38,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:55:38,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:55:38,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:55:38,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457927235] [2024-06-14 13:55:38,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457927235] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:55:38,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:55:38,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:55:38,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898789983] [2024-06-14 13:55:38,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:55:38,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:55:38,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:55:38,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:55:38,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:55:38,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:55:38,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 373 transitions, 4622 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:38,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:55:38,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:55:38,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:55:39,683 INFO L124 PetriNetUnfolderBase]: 3958/6832 cut-off events. [2024-06-14 13:55:39,683 INFO L125 PetriNetUnfolderBase]: For 987135/987139 co-relation queries the response was YES. [2024-06-14 13:55:39,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53420 conditions, 6832 events. 3958/6832 cut-off events. For 987135/987139 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 48966 event pairs, 1466 based on Foata normal form. 4/6834 useless extension candidates. Maximal degree in co-relation 53257. Up to 5947 conditions per place. [2024-06-14 13:55:39,780 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 280 selfloop transitions, 112 changer transitions 0/398 dead transitions. [2024-06-14 13:55:39,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 398 transitions, 5762 flow [2024-06-14 13:55:39,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:55:39,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:55:39,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 181 transitions. [2024-06-14 13:55:39,812 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.551829268292683 [2024-06-14 13:55:39,812 INFO L175 Difference]: Start difference. First operand has 323 places, 373 transitions, 4622 flow. Second operand 8 states and 181 transitions. [2024-06-14 13:55:39,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 398 transitions, 5762 flow [2024-06-14 13:55:43,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 398 transitions, 5529 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-14 13:55:43,225 INFO L231 Difference]: Finished difference. Result has 327 places, 377 transitions, 4742 flow [2024-06-14 13:55:43,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4390, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4742, PETRI_PLACES=327, PETRI_TRANSITIONS=377} [2024-06-14 13:55:43,225 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 285 predicate places. [2024-06-14 13:55:43,226 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 377 transitions, 4742 flow [2024-06-14 13:55:43,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:43,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:55:43,226 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:55:43,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-14 13:55:43,226 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:55:43,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:55:43,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1287896998, now seen corresponding path program 5 times [2024-06-14 13:55:43,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:55:43,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175506444] [2024-06-14 13:55:43,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:55:43,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:55:43,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:55:43,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:55:43,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:55:43,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175506444] [2024-06-14 13:55:43,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175506444] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:55:43,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:55:43,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:55:43,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719055428] [2024-06-14 13:55:43,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:55:43,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:55:43,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:55:43,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:55:43,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:55:43,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:55:43,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 377 transitions, 4742 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:43,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:55:43,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:55:43,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:55:44,702 INFO L124 PetriNetUnfolderBase]: 3913/6728 cut-off events. [2024-06-14 13:55:44,702 INFO L125 PetriNetUnfolderBase]: For 998212/998214 co-relation queries the response was YES. [2024-06-14 13:55:44,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52229 conditions, 6728 events. 3913/6728 cut-off events. For 998212/998214 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 47815 event pairs, 1406 based on Foata normal form. 10/6735 useless extension candidates. Maximal degree in co-relation 52064. Up to 5905 conditions per place. [2024-06-14 13:55:44,788 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 270 selfloop transitions, 123 changer transitions 4/403 dead transitions. [2024-06-14 13:55:44,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 403 transitions, 5618 flow [2024-06-14 13:55:44,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:55:44,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:55:44,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 209 transitions. [2024-06-14 13:55:44,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5663956639566395 [2024-06-14 13:55:44,790 INFO L175 Difference]: Start difference. First operand has 327 places, 377 transitions, 4742 flow. Second operand 9 states and 209 transitions. [2024-06-14 13:55:44,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 403 transitions, 5618 flow [2024-06-14 13:55:48,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 403 transitions, 5367 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-14 13:55:48,416 INFO L231 Difference]: Finished difference. Result has 331 places, 376 transitions, 4732 flow [2024-06-14 13:55:48,417 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4491, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4732, PETRI_PLACES=331, PETRI_TRANSITIONS=376} [2024-06-14 13:55:48,419 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 289 predicate places. [2024-06-14 13:55:48,420 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 376 transitions, 4732 flow [2024-06-14 13:55:48,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:48,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:55:48,420 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:55:48,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-14 13:55:48,420 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:55:48,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:55:48,421 INFO L85 PathProgramCache]: Analyzing trace with hash -308759160, now seen corresponding path program 6 times [2024-06-14 13:55:48,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:55:48,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137253029] [2024-06-14 13:55:48,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:55:48,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:55:48,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:55:48,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:55:48,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:55:48,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137253029] [2024-06-14 13:55:48,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137253029] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:55:48,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:55:48,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:55:48,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286298678] [2024-06-14 13:55:48,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:55:48,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:55:48,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:55:48,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:55:48,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:55:48,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:55:48,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 376 transitions, 4732 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:48,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:55:48,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:55:48,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:55:49,859 INFO L124 PetriNetUnfolderBase]: 3851/6580 cut-off events. [2024-06-14 13:55:49,859 INFO L125 PetriNetUnfolderBase]: For 981271/981273 co-relation queries the response was YES. [2024-06-14 13:55:49,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51094 conditions, 6580 events. 3851/6580 cut-off events. For 981271/981273 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 46186 event pairs, 1320 based on Foata normal form. 10/6587 useless extension candidates. Maximal degree in co-relation 50928. Up to 5571 conditions per place. [2024-06-14 13:55:49,956 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 268 selfloop transitions, 131 changer transitions 7/412 dead transitions. [2024-06-14 13:55:49,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 412 transitions, 5955 flow [2024-06-14 13:55:49,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:55:49,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:55:49,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 215 transitions. [2024-06-14 13:55:49,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5826558265582655 [2024-06-14 13:55:49,958 INFO L175 Difference]: Start difference. First operand has 331 places, 376 transitions, 4732 flow. Second operand 9 states and 215 transitions. [2024-06-14 13:55:49,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 412 transitions, 5955 flow [2024-06-14 13:55:52,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 412 transitions, 5667 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-06-14 13:55:52,995 INFO L231 Difference]: Finished difference. Result has 333 places, 377 transitions, 4803 flow [2024-06-14 13:55:52,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4444, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4803, PETRI_PLACES=333, PETRI_TRANSITIONS=377} [2024-06-14 13:55:52,995 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 291 predicate places. [2024-06-14 13:55:52,995 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 377 transitions, 4803 flow [2024-06-14 13:55:52,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:52,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:55:52,996 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:55:52,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-14 13:55:52,996 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:55:52,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:55:52,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1549480730, now seen corresponding path program 7 times [2024-06-14 13:55:52,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:55:52,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677814496] [2024-06-14 13:55:52,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:55:52,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:55:53,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:55:53,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:55:53,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:55:53,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677814496] [2024-06-14 13:55:53,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677814496] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:55:53,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:55:53,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:55:53,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229730155] [2024-06-14 13:55:53,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:55:53,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:55:53,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:55:53,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:55:53,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:55:53,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:55:53,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 377 transitions, 4803 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:53,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:55:53,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:55:53,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:55:54,260 INFO L124 PetriNetUnfolderBase]: 3568/6128 cut-off events. [2024-06-14 13:55:54,260 INFO L125 PetriNetUnfolderBase]: For 961207/961211 co-relation queries the response was YES. [2024-06-14 13:55:54,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48402 conditions, 6128 events. 3568/6128 cut-off events. For 961207/961211 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 42637 event pairs, 1243 based on Foata normal form. 12/6138 useless extension candidates. Maximal degree in co-relation 48235. Up to 5345 conditions per place. [2024-06-14 13:55:54,346 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 287 selfloop transitions, 105 changer transitions 0/398 dead transitions. [2024-06-14 13:55:54,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 398 transitions, 5703 flow [2024-06-14 13:55:54,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:55:54,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:55:54,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-14 13:55:54,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487804878048781 [2024-06-14 13:55:54,347 INFO L175 Difference]: Start difference. First operand has 333 places, 377 transitions, 4803 flow. Second operand 8 states and 180 transitions. [2024-06-14 13:55:54,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 398 transitions, 5703 flow [2024-06-14 13:55:57,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 398 transitions, 5403 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-14 13:55:57,649 INFO L231 Difference]: Finished difference. Result has 335 places, 379 transitions, 4779 flow [2024-06-14 13:55:57,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4503, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4779, PETRI_PLACES=335, PETRI_TRANSITIONS=379} [2024-06-14 13:55:57,649 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 293 predicate places. [2024-06-14 13:55:57,650 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 379 transitions, 4779 flow [2024-06-14 13:55:57,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:57,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:55:57,650 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:55:57,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-14 13:55:57,650 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:55:57,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:55:57,650 INFO L85 PathProgramCache]: Analyzing trace with hash -1405590200, now seen corresponding path program 8 times [2024-06-14 13:55:57,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:55:57,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2708433] [2024-06-14 13:55:57,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:55:57,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:55:57,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:55:57,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:55:57,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:55:57,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2708433] [2024-06-14 13:55:57,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2708433] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:55:57,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:55:57,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:55:57,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099796282] [2024-06-14 13:55:57,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:55:57,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:55:57,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:55:57,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:55:57,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:55:57,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:55:57,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 379 transitions, 4779 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:57,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:55:57,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:55:57,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:55:58,982 INFO L124 PetriNetUnfolderBase]: 3556/6106 cut-off events. [2024-06-14 13:55:58,982 INFO L125 PetriNetUnfolderBase]: For 912952/912956 co-relation queries the response was YES. [2024-06-14 13:55:59,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47745 conditions, 6106 events. 3556/6106 cut-off events. For 912952/912956 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 42382 event pairs, 1239 based on Foata normal form. 4/6108 useless extension candidates. Maximal degree in co-relation 47577. Up to 5357 conditions per place. [2024-06-14 13:55:59,068 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 284 selfloop transitions, 105 changer transitions 0/395 dead transitions. [2024-06-14 13:55:59,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 395 transitions, 5595 flow [2024-06-14 13:55:59,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:55:59,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:55:59,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 176 transitions. [2024-06-14 13:55:59,069 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-06-14 13:55:59,069 INFO L175 Difference]: Start difference. First operand has 335 places, 379 transitions, 4779 flow. Second operand 8 states and 176 transitions. [2024-06-14 13:55:59,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 395 transitions, 5595 flow [2024-06-14 13:56:02,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 395 transitions, 5325 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-14 13:56:02,540 INFO L231 Difference]: Finished difference. Result has 337 places, 379 transitions, 4724 flow [2024-06-14 13:56:02,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4509, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4724, PETRI_PLACES=337, PETRI_TRANSITIONS=379} [2024-06-14 13:56:02,540 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 295 predicate places. [2024-06-14 13:56:02,540 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 379 transitions, 4724 flow [2024-06-14 13:56:02,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:02,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:56:02,541 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:56:02,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-14 13:56:02,541 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:56:02,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:56:02,541 INFO L85 PathProgramCache]: Analyzing trace with hash -698118938, now seen corresponding path program 9 times [2024-06-14 13:56:02,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:56:02,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232065898] [2024-06-14 13:56:02,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:56:02,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:56:02,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:56:02,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:56:02,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:56:02,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232065898] [2024-06-14 13:56:02,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232065898] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:56:02,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:56:02,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:56:02,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421650949] [2024-06-14 13:56:02,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:56:02,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:56:02,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:56:02,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:56:02,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:56:02,756 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:56:02,756 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 379 transitions, 4724 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:02,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:56:02,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:56:02,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:56:03,935 INFO L124 PetriNetUnfolderBase]: 3551/6091 cut-off events. [2024-06-14 13:56:03,935 INFO L125 PetriNetUnfolderBase]: For 929921/929925 co-relation queries the response was YES. [2024-06-14 13:56:03,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47174 conditions, 6091 events. 3551/6091 cut-off events. For 929921/929925 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 42117 event pairs, 1130 based on Foata normal form. 10/6099 useless extension candidates. Maximal degree in co-relation 47005. Up to 4459 conditions per place. [2024-06-14 13:56:04,008 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 282 selfloop transitions, 122 changer transitions 0/410 dead transitions. [2024-06-14 13:56:04,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 410 transitions, 6081 flow [2024-06-14 13:56:04,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:56:04,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:56:04,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-14 13:56:04,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.573170731707317 [2024-06-14 13:56:04,010 INFO L175 Difference]: Start difference. First operand has 337 places, 379 transitions, 4724 flow. Second operand 8 states and 188 transitions. [2024-06-14 13:56:04,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 410 transitions, 6081 flow [2024-06-14 13:56:07,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 410 transitions, 5803 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-14 13:56:07,828 INFO L231 Difference]: Finished difference. Result has 336 places, 381 transitions, 4755 flow [2024-06-14 13:56:07,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4450, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4755, PETRI_PLACES=336, PETRI_TRANSITIONS=381} [2024-06-14 13:56:07,829 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 294 predicate places. [2024-06-14 13:56:07,829 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 381 transitions, 4755 flow [2024-06-14 13:56:07,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:07,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:56:07,829 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:56:07,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-14 13:56:07,829 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:56:07,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:56:07,830 INFO L85 PathProgramCache]: Analyzing trace with hash -692405018, now seen corresponding path program 10 times [2024-06-14 13:56:07,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:56:07,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796348081] [2024-06-14 13:56:07,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:56:07,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:56:07,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:56:08,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:56:08,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:56:08,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796348081] [2024-06-14 13:56:08,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796348081] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:56:08,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:56:08,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:56:08,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809492417] [2024-06-14 13:56:08,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:56:08,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:56:08,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:56:08,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:56:08,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:56:08,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:56:08,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 381 transitions, 4755 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:08,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:56:08,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:56:08,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:56:09,125 INFO L124 PetriNetUnfolderBase]: 3539/6069 cut-off events. [2024-06-14 13:56:09,125 INFO L125 PetriNetUnfolderBase]: For 892579/892583 co-relation queries the response was YES. [2024-06-14 13:56:09,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46981 conditions, 6069 events. 3539/6069 cut-off events. For 892579/892583 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 41996 event pairs, 1128 based on Foata normal form. 4/6071 useless extension candidates. Maximal degree in co-relation 46811. Up to 4451 conditions per place. [2024-06-14 13:56:09,207 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 277 selfloop transitions, 125 changer transitions 0/408 dead transitions. [2024-06-14 13:56:09,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 408 transitions, 5857 flow [2024-06-14 13:56:09,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:56:09,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:56:09,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-14 13:56:09,208 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5670731707317073 [2024-06-14 13:56:09,208 INFO L175 Difference]: Start difference. First operand has 336 places, 381 transitions, 4755 flow. Second operand 8 states and 186 transitions. [2024-06-14 13:56:09,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 408 transitions, 5857 flow [2024-06-14 13:56:13,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 408 transitions, 5568 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-14 13:56:13,502 INFO L231 Difference]: Finished difference. Result has 339 places, 381 transitions, 4721 flow [2024-06-14 13:56:13,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4466, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4721, PETRI_PLACES=339, PETRI_TRANSITIONS=381} [2024-06-14 13:56:13,503 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 297 predicate places. [2024-06-14 13:56:13,503 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 381 transitions, 4721 flow [2024-06-14 13:56:13,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:13,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:56:13,503 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:56:13,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-14 13:56:13,504 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:56:13,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:56:13,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1863165372, now seen corresponding path program 1 times [2024-06-14 13:56:13,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:56:13,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911425032] [2024-06-14 13:56:13,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:56:13,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:56:13,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:56:13,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:56:13,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:56:13,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911425032] [2024-06-14 13:56:13,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911425032] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:56:13,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:56:13,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:56:13,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690979682] [2024-06-14 13:56:13,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:56:13,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:56:13,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:56:13,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:56:13,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:56:13,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:56:13,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 381 transitions, 4721 flow. Second operand has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:13,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:56:13,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:56:13,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:56:14,985 INFO L124 PetriNetUnfolderBase]: 4006/6878 cut-off events. [2024-06-14 13:56:14,985 INFO L125 PetriNetUnfolderBase]: For 1360578/1360582 co-relation queries the response was YES. [2024-06-14 13:56:15,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59882 conditions, 6878 events. 4006/6878 cut-off events. For 1360578/1360582 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 48842 event pairs, 1118 based on Foata normal form. 8/6884 useless extension candidates. Maximal degree in co-relation 59711. Up to 2614 conditions per place. [2024-06-14 13:56:15,091 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 319 selfloop transitions, 107 changer transitions 0/432 dead transitions. [2024-06-14 13:56:15,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 432 transitions, 6513 flow [2024-06-14 13:56:15,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:56:15,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:56:15,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-14 13:56:15,092 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6280487804878049 [2024-06-14 13:56:15,092 INFO L175 Difference]: Start difference. First operand has 339 places, 381 transitions, 4721 flow. Second operand 8 states and 206 transitions. [2024-06-14 13:56:15,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 432 transitions, 6513 flow [2024-06-14 13:56:19,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 432 transitions, 6218 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-14 13:56:19,749 INFO L231 Difference]: Finished difference. Result has 341 places, 384 transitions, 4769 flow [2024-06-14 13:56:19,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4426, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4769, PETRI_PLACES=341, PETRI_TRANSITIONS=384} [2024-06-14 13:56:19,750 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 299 predicate places. [2024-06-14 13:56:19,750 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 384 transitions, 4769 flow [2024-06-14 13:56:19,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:19,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:56:19,750 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:56:19,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-14 13:56:19,750 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:56:19,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:56:19,751 INFO L85 PathProgramCache]: Analyzing trace with hash -1863045402, now seen corresponding path program 2 times [2024-06-14 13:56:19,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:56:19,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545985267] [2024-06-14 13:56:19,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:56:19,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:56:19,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:56:19,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:56:19,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:56:19,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545985267] [2024-06-14 13:56:19,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545985267] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:56:19,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:56:19,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:56:19,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052170670] [2024-06-14 13:56:19,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:56:19,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:56:19,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:56:19,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:56:19,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:56:19,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:56:19,966 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 384 transitions, 4769 flow. Second operand has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:19,966 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:56:19,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:56:19,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:56:21,343 INFO L124 PetriNetUnfolderBase]: 4211/7263 cut-off events. [2024-06-14 13:56:21,343 INFO L125 PetriNetUnfolderBase]: For 1588002/1588006 co-relation queries the response was YES. [2024-06-14 13:56:21,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64379 conditions, 7263 events. 4211/7263 cut-off events. For 1588002/1588006 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 52413 event pairs, 1229 based on Foata normal form. 26/7287 useless extension candidates. Maximal degree in co-relation 64205. Up to 6136 conditions per place. [2024-06-14 13:56:21,458 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 380 selfloop transitions, 34 changer transitions 0/420 dead transitions. [2024-06-14 13:56:21,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 420 transitions, 5991 flow [2024-06-14 13:56:21,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:56:21,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:56:21,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 179 transitions. [2024-06-14 13:56:21,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5457317073170732 [2024-06-14 13:56:21,459 INFO L175 Difference]: Start difference. First operand has 341 places, 384 transitions, 4769 flow. Second operand 8 states and 179 transitions. [2024-06-14 13:56:21,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 420 transitions, 5991 flow [2024-06-14 13:56:27,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 420 transitions, 5742 flow, removed 32 selfloop flow, removed 4 redundant places. [2024-06-14 13:56:27,482 INFO L231 Difference]: Finished difference. Result has 346 places, 388 transitions, 4684 flow [2024-06-14 13:56:27,482 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4536, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=352, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4684, PETRI_PLACES=346, PETRI_TRANSITIONS=388} [2024-06-14 13:56:27,482 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 304 predicate places. [2024-06-14 13:56:27,482 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 388 transitions, 4684 flow [2024-06-14 13:56:27,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:27,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:56:27,483 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:56:27,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-14 13:56:27,483 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:56:27,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:56:27,483 INFO L85 PathProgramCache]: Analyzing trace with hash 30948590, now seen corresponding path program 1 times [2024-06-14 13:56:27,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:56:27,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053836111] [2024-06-14 13:56:27,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:56:27,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:56:27,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:56:27,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:56:27,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:56:27,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053836111] [2024-06-14 13:56:27,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053836111] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:56:27,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:56:27,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:56:27,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876109558] [2024-06-14 13:56:27,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:56:27,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:56:27,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:56:27,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:56:27,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:56:27,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:56:27,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 388 transitions, 4684 flow. Second operand has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:27,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:56:27,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:56:27,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:56:28,988 INFO L124 PetriNetUnfolderBase]: 3931/6789 cut-off events. [2024-06-14 13:56:28,988 INFO L125 PetriNetUnfolderBase]: For 1294616/1294620 co-relation queries the response was YES. [2024-06-14 13:56:29,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54994 conditions, 6789 events. 3931/6789 cut-off events. For 1294616/1294620 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 48317 event pairs, 1078 based on Foata normal form. 26/6813 useless extension candidates. Maximal degree in co-relation 54818. Up to 5791 conditions per place. [2024-06-14 13:56:29,093 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 365 selfloop transitions, 29 changer transitions 19/419 dead transitions. [2024-06-14 13:56:29,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 419 transitions, 5620 flow [2024-06-14 13:56:29,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:56:29,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:56:29,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 178 transitions. [2024-06-14 13:56:29,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5426829268292683 [2024-06-14 13:56:29,094 INFO L175 Difference]: Start difference. First operand has 346 places, 388 transitions, 4684 flow. Second operand 8 states and 178 transitions. [2024-06-14 13:56:29,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 419 transitions, 5620 flow [2024-06-14 13:56:34,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 419 transitions, 5508 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-14 13:56:34,310 INFO L231 Difference]: Finished difference. Result has 350 places, 383 transitions, 4586 flow [2024-06-14 13:56:34,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4572, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4586, PETRI_PLACES=350, PETRI_TRANSITIONS=383} [2024-06-14 13:56:34,318 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 308 predicate places. [2024-06-14 13:56:34,318 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 383 transitions, 4586 flow [2024-06-14 13:56:34,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:34,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:56:34,319 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:56:34,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-14 13:56:34,319 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:56:34,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:56:34,319 INFO L85 PathProgramCache]: Analyzing trace with hash -39088272, now seen corresponding path program 2 times [2024-06-14 13:56:34,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:56:34,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877884671] [2024-06-14 13:56:34,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:56:34,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:56:34,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:56:34,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:56:34,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:56:34,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877884671] [2024-06-14 13:56:34,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877884671] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:56:34,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:56:34,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:56:34,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506406414] [2024-06-14 13:56:34,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:56:34,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:56:34,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:56:34,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:56:34,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:56:34,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:56:34,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 383 transitions, 4586 flow. Second operand has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:34,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:56:34,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:56:34,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:56:35,840 INFO L124 PetriNetUnfolderBase]: 3980/6868 cut-off events. [2024-06-14 13:56:35,840 INFO L125 PetriNetUnfolderBase]: For 1442470/1442474 co-relation queries the response was YES. [2024-06-14 13:56:35,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57989 conditions, 6868 events. 3980/6868 cut-off events. For 1442470/1442474 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 49007 event pairs, 1097 based on Foata normal form. 26/6892 useless extension candidates. Maximal degree in co-relation 57812. Up to 5108 conditions per place. [2024-06-14 13:56:35,943 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 383 selfloop transitions, 33 changer transitions 0/422 dead transitions. [2024-06-14 13:56:35,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 422 transitions, 6027 flow [2024-06-14 13:56:35,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:56:35,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:56:35,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 200 transitions. [2024-06-14 13:56:35,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5420054200542005 [2024-06-14 13:56:35,944 INFO L175 Difference]: Start difference. First operand has 350 places, 383 transitions, 4586 flow. Second operand 9 states and 200 transitions. [2024-06-14 13:56:35,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 422 transitions, 6027 flow [2024-06-14 13:56:41,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 422 transitions, 5949 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-14 13:56:41,419 INFO L231 Difference]: Finished difference. Result has 346 places, 385 transitions, 4618 flow [2024-06-14 13:56:41,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4520, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4618, PETRI_PLACES=346, PETRI_TRANSITIONS=385} [2024-06-14 13:56:41,420 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 304 predicate places. [2024-06-14 13:56:41,420 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 385 transitions, 4618 flow [2024-06-14 13:56:41,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:41,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:56:41,420 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:56:41,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-14 13:56:41,421 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:56:41,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:56:41,421 INFO L85 PathProgramCache]: Analyzing trace with hash -38851122, now seen corresponding path program 3 times [2024-06-14 13:56:41,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:56:41,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317657659] [2024-06-14 13:56:41,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:56:41,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:56:41,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:56:41,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:56:41,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:56:41,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317657659] [2024-06-14 13:56:41,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317657659] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:56:41,595 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:56:41,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:56:41,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437841034] [2024-06-14 13:56:41,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:56:41,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:56:41,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:56:41,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:56:41,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:56:41,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:56:41,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 385 transitions, 4618 flow. Second operand has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:41,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:56:41,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:56:41,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:56:42,952 INFO L124 PetriNetUnfolderBase]: 4048/7012 cut-off events. [2024-06-14 13:56:42,953 INFO L125 PetriNetUnfolderBase]: For 1384016/1384020 co-relation queries the response was YES. [2024-06-14 13:56:43,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59325 conditions, 7012 events. 4048/7012 cut-off events. For 1384016/1384020 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 50442 event pairs, 977 based on Foata normal form. 8/7018 useless extension candidates. Maximal degree in co-relation 59150. Up to 5108 conditions per place. [2024-06-14 13:56:43,058 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 375 selfloop transitions, 37 changer transitions 0/418 dead transitions. [2024-06-14 13:56:43,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 418 transitions, 5998 flow [2024-06-14 13:56:43,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:56:43,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:56:43,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 179 transitions. [2024-06-14 13:56:43,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5457317073170732 [2024-06-14 13:56:43,059 INFO L175 Difference]: Start difference. First operand has 346 places, 385 transitions, 4618 flow. Second operand 8 states and 179 transitions. [2024-06-14 13:56:43,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 418 transitions, 5998 flow [2024-06-14 13:56:48,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 418 transitions, 5899 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-14 13:56:48,390 INFO L231 Difference]: Finished difference. Result has 351 places, 386 transitions, 4647 flow [2024-06-14 13:56:48,390 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4519, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4647, PETRI_PLACES=351, PETRI_TRANSITIONS=386} [2024-06-14 13:56:48,391 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 309 predicate places. [2024-06-14 13:56:48,391 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 386 transitions, 4647 flow [2024-06-14 13:56:48,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:48,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:56:48,391 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:56:48,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-14 13:56:48,391 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:56:48,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:56:48,392 INFO L85 PathProgramCache]: Analyzing trace with hash -742570558, now seen corresponding path program 3 times [2024-06-14 13:56:48,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:56:48,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978979987] [2024-06-14 13:56:48,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:56:48,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:56:48,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:56:48,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:56:48,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:56:48,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978979987] [2024-06-14 13:56:48,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978979987] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:56:48,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:56:48,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:56:48,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196643036] [2024-06-14 13:56:48,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:56:48,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:56:48,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:56:48,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:56:48,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:56:48,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:56:48,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 386 transitions, 4647 flow. Second operand has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:48,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:56:48,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:56:48,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:56:50,039 INFO L124 PetriNetUnfolderBase]: 3987/6883 cut-off events. [2024-06-14 13:56:50,040 INFO L125 PetriNetUnfolderBase]: For 1384367/1384371 co-relation queries the response was YES. [2024-06-14 13:56:50,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56654 conditions, 6883 events. 3987/6883 cut-off events. For 1384367/1384371 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 49137 event pairs, 1129 based on Foata normal form. 26/6907 useless extension candidates. Maximal degree in co-relation 56478. Up to 5108 conditions per place. [2024-06-14 13:56:50,128 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 367 selfloop transitions, 27 changer transitions 21/421 dead transitions. [2024-06-14 13:56:50,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 421 transitions, 5815 flow [2024-06-14 13:56:50,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:56:50,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:56:50,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 198 transitions. [2024-06-14 13:56:50,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-06-14 13:56:50,129 INFO L175 Difference]: Start difference. First operand has 351 places, 386 transitions, 4647 flow. Second operand 9 states and 198 transitions. [2024-06-14 13:56:50,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 421 transitions, 5815 flow [2024-06-14 13:56:54,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 421 transitions, 5564 flow, removed 30 selfloop flow, removed 8 redundant places. [2024-06-14 13:56:54,607 INFO L231 Difference]: Finished difference. Result has 352 places, 379 transitions, 4376 flow [2024-06-14 13:56:54,607 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4396, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4376, PETRI_PLACES=352, PETRI_TRANSITIONS=379} [2024-06-14 13:56:54,607 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 310 predicate places. [2024-06-14 13:56:54,607 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 379 transitions, 4376 flow [2024-06-14 13:56:54,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:54,608 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:56:54,608 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:56:54,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-14 13:56:54,608 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:56:54,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:56:54,608 INFO L85 PathProgramCache]: Analyzing trace with hash 553124596, now seen corresponding path program 4 times [2024-06-14 13:56:54,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:56:54,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399107769] [2024-06-14 13:56:54,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:56:54,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:56:54,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:56:54,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:56:54,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:56:54,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399107769] [2024-06-14 13:56:54,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399107769] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:56:54,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:56:54,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:56:54,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450088700] [2024-06-14 13:56:54,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:56:54,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:56:54,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:56:54,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:56:54,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:56:54,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:56:54,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 379 transitions, 4376 flow. Second operand has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:54,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:56:54,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:56:54,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:56:56,121 INFO L124 PetriNetUnfolderBase]: 3873/6682 cut-off events. [2024-06-14 13:56:56,121 INFO L125 PetriNetUnfolderBase]: For 1354419/1354421 co-relation queries the response was YES. [2024-06-14 13:56:56,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56350 conditions, 6682 events. 3873/6682 cut-off events. For 1354419/1354421 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 47454 event pairs, 1223 based on Foata normal form. 6/6685 useless extension candidates. Maximal degree in co-relation 56176. Up to 4274 conditions per place. [2024-06-14 13:56:56,221 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 300 selfloop transitions, 119 changer transitions 1/426 dead transitions. [2024-06-14 13:56:56,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 426 transitions, 5876 flow [2024-06-14 13:56:56,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:56:56,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:56:56,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 225 transitions. [2024-06-14 13:56:56,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-14 13:56:56,223 INFO L175 Difference]: Start difference. First operand has 352 places, 379 transitions, 4376 flow. Second operand 9 states and 225 transitions. [2024-06-14 13:56:56,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 426 transitions, 5876 flow [2024-06-14 13:57:00,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 426 transitions, 5754 flow, removed 15 selfloop flow, removed 11 redundant places. [2024-06-14 13:57:00,703 INFO L231 Difference]: Finished difference. Result has 344 places, 381 transitions, 4648 flow [2024-06-14 13:57:00,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4270, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4648, PETRI_PLACES=344, PETRI_TRANSITIONS=381} [2024-06-14 13:57:00,703 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 302 predicate places. [2024-06-14 13:57:00,704 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 381 transitions, 4648 flow [2024-06-14 13:57:00,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:57:00,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:57:00,704 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:57:00,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-14 13:57:00,704 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:57:00,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:57:00,705 INFO L85 PathProgramCache]: Analyzing trace with hash 970973678, now seen corresponding path program 5 times [2024-06-14 13:57:00,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:57:00,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128585907] [2024-06-14 13:57:00,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:57:00,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:57:00,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:57:00,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:57:00,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:57:00,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128585907] [2024-06-14 13:57:00,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128585907] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:57:00,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:57:00,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:57:00,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639268410] [2024-06-14 13:57:00,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:57:00,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:57:00,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:57:00,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:57:00,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:57:00,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:57:00,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 381 transitions, 4648 flow. Second operand has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:57:00,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:57:00,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:57:00,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:57:02,103 INFO L124 PetriNetUnfolderBase]: 3761/6507 cut-off events. [2024-06-14 13:57:02,103 INFO L125 PetriNetUnfolderBase]: For 1186528/1186530 co-relation queries the response was YES. [2024-06-14 13:57:02,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51583 conditions, 6507 events. 3761/6507 cut-off events. For 1186528/1186530 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 46169 event pairs, 1257 based on Foata normal form. 24/6523 useless extension candidates. Maximal degree in co-relation 51413. Up to 5559 conditions per place. [2024-06-14 13:57:02,196 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 379 selfloop transitions, 27 changer transitions 0/412 dead transitions. [2024-06-14 13:57:02,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 412 transitions, 5770 flow [2024-06-14 13:57:02,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:57:02,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:57:02,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 179 transitions. [2024-06-14 13:57:02,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5457317073170732 [2024-06-14 13:57:02,197 INFO L175 Difference]: Start difference. First operand has 344 places, 381 transitions, 4648 flow. Second operand 8 states and 179 transitions. [2024-06-14 13:57:02,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 412 transitions, 5770 flow [2024-06-14 13:57:06,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 412 transitions, 5533 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-14 13:57:06,595 INFO L231 Difference]: Finished difference. Result has 346 places, 381 transitions, 4470 flow [2024-06-14 13:57:06,596 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4411, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4470, PETRI_PLACES=346, PETRI_TRANSITIONS=381} [2024-06-14 13:57:06,596 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 304 predicate places. [2024-06-14 13:57:06,596 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 381 transitions, 4470 flow [2024-06-14 13:57:06,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:57:06,596 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:57:06,596 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:57:06,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-14 13:57:06,597 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:57:06,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:57:06,597 INFO L85 PathProgramCache]: Analyzing trace with hash 226271366, now seen corresponding path program 4 times [2024-06-14 13:57:06,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:57:06,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399238667] [2024-06-14 13:57:06,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:57:06,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:57:06,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:57:06,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:57:06,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:57:06,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399238667] [2024-06-14 13:57:06,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399238667] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:57:06,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:57:06,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:57:06,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216535863] [2024-06-14 13:57:06,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:57:06,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:57:06,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:57:06,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:57:06,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:57:06,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:57:06,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 381 transitions, 4470 flow. Second operand has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:57:06,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:57:06,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:57:06,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:57:08,009 INFO L124 PetriNetUnfolderBase]: 3700/6398 cut-off events. [2024-06-14 13:57:08,010 INFO L125 PetriNetUnfolderBase]: For 1089910/1089912 co-relation queries the response was YES. [2024-06-14 13:57:08,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48230 conditions, 6398 events. 3700/6398 cut-off events. For 1089910/1089912 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 45218 event pairs, 1241 based on Foata normal form. 24/6414 useless extension candidates. Maximal degree in co-relation 48060. Up to 5559 conditions per place. [2024-06-14 13:57:08,102 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 364 selfloop transitions, 22 changer transitions 19/411 dead transitions. [2024-06-14 13:57:08,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 411 transitions, 5388 flow [2024-06-14 13:57:08,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:57:08,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:57:08,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 178 transitions. [2024-06-14 13:57:08,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5426829268292683 [2024-06-14 13:57:08,103 INFO L175 Difference]: Start difference. First operand has 346 places, 381 transitions, 4470 flow. Second operand 8 states and 178 transitions. [2024-06-14 13:57:08,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 411 transitions, 5388 flow [2024-06-14 13:57:11,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 411 transitions, 5213 flow, removed 4 selfloop flow, removed 11 redundant places. [2024-06-14 13:57:11,938 INFO L231 Difference]: Finished difference. Result has 343 places, 376 transitions, 4300 flow [2024-06-14 13:57:11,939 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4295, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4300, PETRI_PLACES=343, PETRI_TRANSITIONS=376} [2024-06-14 13:57:11,939 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 301 predicate places. [2024-06-14 13:57:11,939 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 376 transitions, 4300 flow [2024-06-14 13:57:11,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:57:11,939 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:57:11,939 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:57:11,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-14 13:57:11,940 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:57:11,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:57:11,940 INFO L85 PathProgramCache]: Analyzing trace with hash 2075997434, now seen corresponding path program 5 times [2024-06-14 13:57:11,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:57:11,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275738997] [2024-06-14 13:57:11,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:57:11,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:57:11,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:57:12,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:57:12,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:57:12,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275738997] [2024-06-14 13:57:12,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275738997] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:57:12,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:57:12,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:57:12,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325593929] [2024-06-14 13:57:12,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:57:12,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:57:12,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:57:12,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:57:12,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:57:12,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:57:12,183 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 376 transitions, 4300 flow. Second operand has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:57:12,183 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:57:12,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:57:12,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:57:13,340 INFO L124 PetriNetUnfolderBase]: 3653/6303 cut-off events. [2024-06-14 13:57:13,340 INFO L125 PetriNetUnfolderBase]: For 1140536/1140540 co-relation queries the response was YES. [2024-06-14 13:57:13,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48399 conditions, 6303 events. 3653/6303 cut-off events. For 1140536/1140540 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 44278 event pairs, 808 based on Foata normal form. 26/6327 useless extension candidates. Maximal degree in co-relation 48228. Up to 3528 conditions per place. [2024-06-14 13:57:13,423 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 324 selfloop transitions, 75 changer transitions 10/415 dead transitions. [2024-06-14 13:57:13,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 415 transitions, 5692 flow [2024-06-14 13:57:13,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:57:13,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:57:13,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-14 13:57:13,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6306620209059234 [2024-06-14 13:57:13,424 INFO L175 Difference]: Start difference. First operand has 343 places, 376 transitions, 4300 flow. Second operand 7 states and 181 transitions. [2024-06-14 13:57:13,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 415 transitions, 5692 flow [2024-06-14 13:57:16,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 415 transitions, 5636 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-14 13:57:16,475 INFO L231 Difference]: Finished difference. Result has 338 places, 373 transitions, 4385 flow [2024-06-14 13:57:16,475 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4252, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4385, PETRI_PLACES=338, PETRI_TRANSITIONS=373} [2024-06-14 13:57:16,475 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 296 predicate places. [2024-06-14 13:57:16,475 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 373 transitions, 4385 flow [2024-06-14 13:57:16,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:57:16,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:57:16,476 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:57:16,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-14 13:57:16,476 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:57:16,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:57:16,481 INFO L85 PathProgramCache]: Analyzing trace with hash 2076234584, now seen corresponding path program 6 times [2024-06-14 13:57:16,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:57:16,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868754276] [2024-06-14 13:57:16,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:57:16,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:57:16,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:57:16,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:57:16,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:57:16,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868754276] [2024-06-14 13:57:16,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868754276] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:57:16,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:57:16,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:57:16,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855867880] [2024-06-14 13:57:16,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:57:16,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:57:16,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:57:16,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:57:16,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:57:16,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:57:16,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 373 transitions, 4385 flow. Second operand has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:57:16,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:57:16,687 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:57:16,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:57:17,798 INFO L124 PetriNetUnfolderBase]: 3585/6193 cut-off events. [2024-06-14 13:57:17,798 INFO L125 PetriNetUnfolderBase]: For 1058491/1058495 co-relation queries the response was YES. [2024-06-14 13:57:17,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48697 conditions, 6193 events. 3585/6193 cut-off events. For 1058491/1058495 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 43304 event pairs, 757 based on Foata normal form. 8/6199 useless extension candidates. Maximal degree in co-relation 48527. Up to 3528 conditions per place. [2024-06-14 13:57:17,885 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 316 selfloop transitions, 72 changer transitions 12/406 dead transitions. [2024-06-14 13:57:17,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 406 transitions, 5715 flow [2024-06-14 13:57:17,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:57:17,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:57:17,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-14 13:57:17,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6062717770034843 [2024-06-14 13:57:17,886 INFO L175 Difference]: Start difference. First operand has 338 places, 373 transitions, 4385 flow. Second operand 7 states and 174 transitions. [2024-06-14 13:57:17,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 406 transitions, 5715 flow [2024-06-14 13:57:21,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 406 transitions, 5555 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-14 13:57:21,652 INFO L231 Difference]: Finished difference. Result has 338 places, 365 transitions, 4283 flow [2024-06-14 13:57:21,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4229, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4283, PETRI_PLACES=338, PETRI_TRANSITIONS=365} [2024-06-14 13:57:21,652 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 296 predicate places. [2024-06-14 13:57:21,652 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 365 transitions, 4283 flow [2024-06-14 13:57:21,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:57:21,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:57:21,653 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:57:21,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-14 13:57:21,653 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:57:21,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:57:21,653 INFO L85 PathProgramCache]: Analyzing trace with hash -1932604270, now seen corresponding path program 6 times [2024-06-14 13:57:21,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:57:21,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41905312] [2024-06-14 13:57:21,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:57:21,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:57:21,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:57:21,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:57:21,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:57:21,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41905312] [2024-06-14 13:57:21,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41905312] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:57:21,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:57:21,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:57:21,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517334217] [2024-06-14 13:57:21,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:57:21,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:57:21,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:57:21,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:57:21,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:57:21,894 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:57:21,894 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 365 transitions, 4283 flow. Second operand has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:57:21,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:57:21,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:57:21,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:57:23,002 INFO L124 PetriNetUnfolderBase]: 3614/6181 cut-off events. [2024-06-14 13:57:23,002 INFO L125 PetriNetUnfolderBase]: For 1228698/1228703 co-relation queries the response was YES. [2024-06-14 13:57:23,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52608 conditions, 6181 events. 3614/6181 cut-off events. For 1228698/1228703 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 42831 event pairs, 1175 based on Foata normal form. 11/6191 useless extension candidates. Maximal degree in co-relation 52455. Up to 4456 conditions per place. [2024-06-14 13:57:23,088 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 326 selfloop transitions, 82 changer transitions 0/414 dead transitions. [2024-06-14 13:57:23,088 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 414 transitions, 5749 flow [2024-06-14 13:57:23,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:57:23,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:57:23,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 220 transitions. [2024-06-14 13:57:23,089 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5962059620596206 [2024-06-14 13:57:23,089 INFO L175 Difference]: Start difference. First operand has 338 places, 365 transitions, 4283 flow. Second operand 9 states and 220 transitions. [2024-06-14 13:57:23,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 414 transitions, 5749 flow [2024-06-14 13:57:26,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 414 transitions, 5585 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-14 13:57:26,664 INFO L231 Difference]: Finished difference. Result has 333 places, 366 transitions, 4335 flow [2024-06-14 13:57:26,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4127, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4335, PETRI_PLACES=333, PETRI_TRANSITIONS=366} [2024-06-14 13:57:26,665 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 291 predicate places. [2024-06-14 13:57:26,665 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 366 transitions, 4335 flow [2024-06-14 13:57:26,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:57:26,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:57:26,665 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:57:26,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-14 13:57:26,665 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:57:26,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:57:26,667 INFO L85 PathProgramCache]: Analyzing trace with hash -1932484300, now seen corresponding path program 7 times [2024-06-14 13:57:26,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:57:26,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573640172] [2024-06-14 13:57:26,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:57:26,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:57:26,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:57:26,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:57:26,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:57:26,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573640172] [2024-06-14 13:57:26,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573640172] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:57:26,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:57:26,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:57:26,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856483764] [2024-06-14 13:57:26,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:57:26,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:57:26,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:57:26,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:57:26,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:57:26,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:57:26,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 366 transitions, 4335 flow. Second operand has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:57:26,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:57:26,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:57:26,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:57:27,916 INFO L124 PetriNetUnfolderBase]: 3391/5798 cut-off events. [2024-06-14 13:57:27,916 INFO L125 PetriNetUnfolderBase]: For 988395/988400 co-relation queries the response was YES. [2024-06-14 13:57:27,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44985 conditions, 5798 events. 3391/5798 cut-off events. For 988395/988400 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 39750 event pairs, 931 based on Foata normal form. 29/5826 useless extension candidates. Maximal degree in co-relation 44834. Up to 4960 conditions per place. [2024-06-14 13:57:27,997 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 356 selfloop transitions, 18 changer transitions 19/399 dead transitions. [2024-06-14 13:57:27,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 399 transitions, 5237 flow [2024-06-14 13:57:27,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:57:27,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:57:27,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 179 transitions. [2024-06-14 13:57:27,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5457317073170732 [2024-06-14 13:57:27,998 INFO L175 Difference]: Start difference. First operand has 333 places, 366 transitions, 4335 flow. Second operand 8 states and 179 transitions. [2024-06-14 13:57:27,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 399 transitions, 5237 flow [2024-06-14 13:57:32,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 399 transitions, 5015 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-06-14 13:57:32,167 INFO L231 Difference]: Finished difference. Result has 334 places, 361 transitions, 4117 flow [2024-06-14 13:57:32,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4113, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4117, PETRI_PLACES=334, PETRI_TRANSITIONS=361} [2024-06-14 13:57:32,167 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 292 predicate places. [2024-06-14 13:57:32,168 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 361 transitions, 4117 flow [2024-06-14 13:57:32,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:57:32,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:57:32,168 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:57:32,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-14 13:57:32,168 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:57:32,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:57:32,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1790501200, now seen corresponding path program 8 times [2024-06-14 13:57:32,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:57:32,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917884188] [2024-06-14 13:57:32,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:57:32,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:57:32,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:57:32,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:57:32,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:57:32,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917884188] [2024-06-14 13:57:32,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917884188] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:57:32,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:57:32,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:57:32,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590218922] [2024-06-14 13:57:32,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:57:32,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:57:32,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:57:32,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:57:32,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:57:32,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:57:32,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 361 transitions, 4117 flow. Second operand has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:57:32,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:57:32,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:57:32,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:57:33,394 INFO L124 PetriNetUnfolderBase]: 3128/5299 cut-off events. [2024-06-14 13:57:33,394 INFO L125 PetriNetUnfolderBase]: For 805934/805939 co-relation queries the response was YES. [2024-06-14 13:57:33,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40616 conditions, 5299 events. 3128/5299 cut-off events. For 805934/805939 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 35457 event pairs, 921 based on Foata normal form. 13/5309 useless extension candidates. Maximal degree in co-relation 40464. Up to 4527 conditions per place. [2024-06-14 13:57:33,462 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 318 selfloop transitions, 79 changer transitions 0/403 dead transitions. [2024-06-14 13:57:33,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 403 transitions, 5329 flow [2024-06-14 13:57:33,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:57:33,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:57:33,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 213 transitions. [2024-06-14 13:57:33,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5772357723577236 [2024-06-14 13:57:33,463 INFO L175 Difference]: Start difference. First operand has 334 places, 361 transitions, 4117 flow. Second operand 9 states and 213 transitions. [2024-06-14 13:57:33,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 403 transitions, 5329 flow [2024-06-14 13:57:36,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 403 transitions, 5279 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-14 13:57:36,497 INFO L231 Difference]: Finished difference. Result has 329 places, 363 transitions, 4315 flow [2024-06-14 13:57:36,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4075, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4315, PETRI_PLACES=329, PETRI_TRANSITIONS=363} [2024-06-14 13:57:36,498 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 287 predicate places. [2024-06-14 13:57:36,498 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 363 transitions, 4315 flow [2024-06-14 13:57:36,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:57:36,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:57:36,498 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:57:36,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-14 13:57:36,499 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:57:36,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:57:36,499 INFO L85 PathProgramCache]: Analyzing trace with hash -1781930320, now seen corresponding path program 9 times [2024-06-14 13:57:36,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:57:36,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302890508] [2024-06-14 13:57:36,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:57:36,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:57:36,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:57:36,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:57:36,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:57:36,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302890508] [2024-06-14 13:57:36,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302890508] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:57:36,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:57:36,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:57:36,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444087470] [2024-06-14 13:57:36,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:57:36,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:57:36,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:57:36,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:57:36,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:57:36,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:57:36,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 363 transitions, 4315 flow. Second operand has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:57:36,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:57:36,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:57:36,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:57:37,622 INFO L124 PetriNetUnfolderBase]: 3110/5275 cut-off events. [2024-06-14 13:57:37,622 INFO L125 PetriNetUnfolderBase]: For 750053/750058 co-relation queries the response was YES. [2024-06-14 13:57:37,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39632 conditions, 5275 events. 3110/5275 cut-off events. For 750053/750058 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 35338 event pairs, 933 based on Foata normal form. 13/5287 useless extension candidates. Maximal degree in co-relation 39482. Up to 4655 conditions per place. [2024-06-14 13:57:37,700 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 311 selfloop transitions, 78 changer transitions 0/395 dead transitions. [2024-06-14 13:57:37,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 395 transitions, 5191 flow [2024-06-14 13:57:37,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:57:37,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:57:37,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 205 transitions. [2024-06-14 13:57:37,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2024-06-14 13:57:37,702 INFO L175 Difference]: Start difference. First operand has 329 places, 363 transitions, 4315 flow. Second operand 9 states and 205 transitions. [2024-06-14 13:57:37,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 395 transitions, 5191 flow [2024-06-14 13:57:40,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 395 transitions, 5032 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-14 13:57:40,917 INFO L231 Difference]: Finished difference. Result has 333 places, 363 transitions, 4317 flow [2024-06-14 13:57:40,917 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4156, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4317, PETRI_PLACES=333, PETRI_TRANSITIONS=363} [2024-06-14 13:57:40,918 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 291 predicate places. [2024-06-14 13:57:40,918 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 363 transitions, 4317 flow [2024-06-14 13:57:40,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:57:40,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:57:40,918 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, 1] [2024-06-14 13:57:40,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-14 13:57:40,918 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:57:40,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:57:40,919 INFO L85 PathProgramCache]: Analyzing trace with hash -932221316, now seen corresponding path program 10 times [2024-06-14 13:57:40,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:57:40,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453981336] [2024-06-14 13:57:40,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:57:40,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:57:40,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:57:41,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:57:41,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:57:41,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453981336] [2024-06-14 13:57:41,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453981336] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:57:41,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:57:41,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:57:41,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348057634] [2024-06-14 13:57:41,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:57:41,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:57:41,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:57:41,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:57:41,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:57:41,175 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:57:41,175 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 363 transitions, 4317 flow. Second operand has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:57:41,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:57:41,176 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:57:41,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:57:42,093 INFO L124 PetriNetUnfolderBase]: 3184/5384 cut-off events. [2024-06-14 13:57:42,094 INFO L125 PetriNetUnfolderBase]: For 807852/807856 co-relation queries the response was YES. [2024-06-14 13:57:42,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41342 conditions, 5384 events. 3184/5384 cut-off events. For 807852/807856 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 36121 event pairs, 955 based on Foata normal form. 10/5392 useless extension candidates. Maximal degree in co-relation 41190. Up to 4611 conditions per place. [2024-06-14 13:57:42,168 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 307 selfloop transitions, 82 changer transitions 0/395 dead transitions. [2024-06-14 13:57:42,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 395 transitions, 5487 flow [2024-06-14 13:57:42,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:57:42,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:57:42,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-14 13:57:42,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5701219512195121 [2024-06-14 13:57:42,170 INFO L175 Difference]: Start difference. First operand has 333 places, 363 transitions, 4317 flow. Second operand 8 states and 187 transitions. [2024-06-14 13:57:42,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 395 transitions, 5487 flow [2024-06-14 13:57:45,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 395 transitions, 5326 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-14 13:57:45,800 INFO L231 Difference]: Finished difference. Result has 333 places, 365 transitions, 4406 flow [2024-06-14 13:57:45,800 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4156, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4406, PETRI_PLACES=333, PETRI_TRANSITIONS=365} [2024-06-14 13:57:45,815 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 291 predicate places. [2024-06-14 13:57:45,815 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 365 transitions, 4406 flow [2024-06-14 13:57:45,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:57:45,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:57:45,816 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:57:45,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-14 13:57:45,816 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:57:45,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:57:45,816 INFO L85 PathProgramCache]: Analyzing trace with hash -923650436, now seen corresponding path program 11 times [2024-06-14 13:57:45,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:57:45,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160814823] [2024-06-14 13:57:45,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:57:45,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:57:45,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:57:45,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:57:45,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:57:45,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160814823] [2024-06-14 13:57:45,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160814823] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:57:45,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:57:45,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:57:45,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086807800] [2024-06-14 13:57:45,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:57:45,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:57:45,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:57:45,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:57:45,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:57:46,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:57:46,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 365 transitions, 4406 flow. Second operand has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:57:46,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:57:46,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:57:46,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:57:46,955 INFO L124 PetriNetUnfolderBase]: 3212/5428 cut-off events. [2024-06-14 13:57:46,955 INFO L125 PetriNetUnfolderBase]: For 824376/824380 co-relation queries the response was YES. [2024-06-14 13:57:47,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41979 conditions, 5428 events. 3212/5428 cut-off events. For 824376/824380 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 36438 event pairs, 975 based on Foata normal form. 10/5436 useless extension candidates. Maximal degree in co-relation 41826. Up to 4813 conditions per place. [2024-06-14 13:57:47,033 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 301 selfloop transitions, 81 changer transitions 0/388 dead transitions. [2024-06-14 13:57:47,033 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 388 transitions, 5284 flow [2024-06-14 13:57:47,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:57:47,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:57:47,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-14 13:57:47,034 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487804878048781 [2024-06-14 13:57:47,034 INFO L175 Difference]: Start difference. First operand has 333 places, 365 transitions, 4406 flow. Second operand 8 states and 180 transitions. [2024-06-14 13:57:47,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 388 transitions, 5284 flow [2024-06-14 13:57:50,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 388 transitions, 5137 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-14 13:57:50,646 INFO L231 Difference]: Finished difference. Result has 337 places, 366 transitions, 4470 flow [2024-06-14 13:57:50,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4265, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4470, PETRI_PLACES=337, PETRI_TRANSITIONS=366} [2024-06-14 13:57:50,656 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 295 predicate places. [2024-06-14 13:57:50,656 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 366 transitions, 4470 flow [2024-06-14 13:57:50,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:57:50,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:57:50,657 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:57:50,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-14 13:57:50,657 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:57:50,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:57:50,657 INFO L85 PathProgramCache]: Analyzing trace with hash 85342844, now seen corresponding path program 12 times [2024-06-14 13:57:50,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:57:50,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972526206] [2024-06-14 13:57:50,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:57:50,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:57:50,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:57:50,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:57:50,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:57:50,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972526206] [2024-06-14 13:57:50,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972526206] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:57:50,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:57:50,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:57:50,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802525938] [2024-06-14 13:57:50,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:57:50,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:57:50,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:57:50,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:57:50,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:57:50,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:57:50,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 366 transitions, 4470 flow. Second operand has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:57:50,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:57:50,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:57:50,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:57:51,781 INFO L124 PetriNetUnfolderBase]: 3194/5402 cut-off events. [2024-06-14 13:57:51,781 INFO L125 PetriNetUnfolderBase]: For 796642/796646 co-relation queries the response was YES. [2024-06-14 13:57:51,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40910 conditions, 5402 events. 3194/5402 cut-off events. For 796642/796646 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 36227 event pairs, 967 based on Foata normal form. 10/5410 useless extension candidates. Maximal degree in co-relation 40755. Up to 4787 conditions per place. [2024-06-14 13:57:51,858 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 296 selfloop transitions, 83 changer transitions 0/385 dead transitions. [2024-06-14 13:57:51,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 385 transitions, 5292 flow [2024-06-14 13:57:51,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:57:51,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:57:51,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 177 transitions. [2024-06-14 13:57:51,859 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5396341463414634 [2024-06-14 13:57:51,859 INFO L175 Difference]: Start difference. First operand has 337 places, 366 transitions, 4470 flow. Second operand 8 states and 177 transitions. [2024-06-14 13:57:51,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 385 transitions, 5292 flow [2024-06-14 13:57:55,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 385 transitions, 5075 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-14 13:57:55,575 INFO L231 Difference]: Finished difference. Result has 339 places, 366 transitions, 4424 flow [2024-06-14 13:57:55,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4253, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4424, PETRI_PLACES=339, PETRI_TRANSITIONS=366} [2024-06-14 13:57:55,576 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 297 predicate places. [2024-06-14 13:57:55,576 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 366 transitions, 4424 flow [2024-06-14 13:57:55,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:57:55,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:57:55,576 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:57:55,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-14 13:57:55,576 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:57:55,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:57:55,577 INFO L85 PathProgramCache]: Analyzing trace with hash -725412194, now seen corresponding path program 1 times [2024-06-14 13:57:55,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:57:55,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489664690] [2024-06-14 13:57:55,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:57:55,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:57:55,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:57:55,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:57:55,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:57:55,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489664690] [2024-06-14 13:57:55,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489664690] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:57:55,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:57:55,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:57:55,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581362893] [2024-06-14 13:57:55,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:57:55,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:57:55,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:57:55,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:57:55,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:57:55,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:57:55,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 366 transitions, 4424 flow. Second operand has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:57:55,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:57:55,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:57:55,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:57:56,768 INFO L124 PetriNetUnfolderBase]: 3247/5479 cut-off events. [2024-06-14 13:57:56,769 INFO L125 PetriNetUnfolderBase]: For 833235/833239 co-relation queries the response was YES. [2024-06-14 13:57:56,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42028 conditions, 5479 events. 3247/5479 cut-off events. For 833235/833239 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 36840 event pairs, 749 based on Foata normal form. 8/5475 useless extension candidates. Maximal degree in co-relation 41872. Up to 4022 conditions per place. [2024-06-14 13:57:56,849 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 292 selfloop transitions, 104 changer transitions 0/402 dead transitions. [2024-06-14 13:57:56,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 402 transitions, 5630 flow [2024-06-14 13:57:56,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:57:56,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:57:56,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-14 13:57:56,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5823170731707317 [2024-06-14 13:57:56,850 INFO L175 Difference]: Start difference. First operand has 339 places, 366 transitions, 4424 flow. Second operand 8 states and 191 transitions. [2024-06-14 13:57:56,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 402 transitions, 5630 flow [2024-06-14 13:58:00,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 402 transitions, 5454 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-14 13:58:00,754 INFO L231 Difference]: Finished difference. Result has 340 places, 368 transitions, 4546 flow [2024-06-14 13:58:00,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4248, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4546, PETRI_PLACES=340, PETRI_TRANSITIONS=368} [2024-06-14 13:58:00,755 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 298 predicate places. [2024-06-14 13:58:00,755 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 368 transitions, 4546 flow [2024-06-14 13:58:00,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:58:00,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:58:00,755 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:58:00,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-14 13:58:00,755 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:58:00,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:58:00,756 INFO L85 PathProgramCache]: Analyzing trace with hash -725113664, now seen corresponding path program 2 times [2024-06-14 13:58:00,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:58:00,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478458044] [2024-06-14 13:58:00,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:58:00,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:58:00,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:58:00,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:58:00,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:58:00,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478458044] [2024-06-14 13:58:00,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478458044] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:58:00,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:58:00,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:58:00,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394080562] [2024-06-14 13:58:00,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:58:00,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:58:00,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:58:00,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:58:00,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:58:01,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:58:01,002 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 368 transitions, 4546 flow. Second operand has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:58:01,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:58:01,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:58:01,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:58:01,951 INFO L124 PetriNetUnfolderBase]: 3267/5515 cut-off events. [2024-06-14 13:58:01,951 INFO L125 PetriNetUnfolderBase]: For 852724/852728 co-relation queries the response was YES. [2024-06-14 13:58:02,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42761 conditions, 5515 events. 3267/5515 cut-off events. For 852724/852728 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 37141 event pairs, 727 based on Foata normal form. 8/5511 useless extension candidates. Maximal degree in co-relation 42604. Up to 4034 conditions per place. [2024-06-14 13:58:02,029 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 290 selfloop transitions, 105 changer transitions 0/401 dead transitions. [2024-06-14 13:58:02,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 401 transitions, 5718 flow [2024-06-14 13:58:02,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:58:02,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:58:02,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-14 13:58:02,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5792682926829268 [2024-06-14 13:58:02,030 INFO L175 Difference]: Start difference. First operand has 340 places, 368 transitions, 4546 flow. Second operand 8 states and 190 transitions. [2024-06-14 13:58:02,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 401 transitions, 5718 flow [2024-06-14 13:58:06,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 401 transitions, 5407 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-14 13:58:06,035 INFO L231 Difference]: Finished difference. Result has 342 places, 369 transitions, 4493 flow [2024-06-14 13:58:06,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4243, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4493, PETRI_PLACES=342, PETRI_TRANSITIONS=369} [2024-06-14 13:58:06,036 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 300 predicate places. [2024-06-14 13:58:06,036 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 369 transitions, 4493 flow [2024-06-14 13:58:06,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:58:06,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:58:06,036 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:58:06,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-14 13:58:06,037 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:58:06,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:58:06,037 INFO L85 PathProgramCache]: Analyzing trace with hash -725113292, now seen corresponding path program 1 times [2024-06-14 13:58:06,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:58:06,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661431604] [2024-06-14 13:58:06,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:58:06,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:58:06,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:58:06,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:58:06,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:58:06,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661431604] [2024-06-14 13:58:06,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661431604] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:58:06,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:58:06,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:58:06,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485395957] [2024-06-14 13:58:06,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:58:06,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:58:06,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:58:06,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:58:06,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:58:06,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:58:06,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 369 transitions, 4493 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:58:06,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:58:06,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:58:06,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:58:07,402 INFO L124 PetriNetUnfolderBase]: 3355/5676 cut-off events. [2024-06-14 13:58:07,402 INFO L125 PetriNetUnfolderBase]: For 1000039/1000041 co-relation queries the response was YES. [2024-06-14 13:58:07,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43267 conditions, 5676 events. 3355/5676 cut-off events. For 1000039/1000041 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 38538 event pairs, 740 based on Foata normal form. 30/5695 useless extension candidates. Maximal degree in co-relation 43110. Up to 4560 conditions per place. [2024-06-14 13:58:07,483 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 293 selfloop transitions, 106 changer transitions 7/412 dead transitions. [2024-06-14 13:58:07,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 412 transitions, 5513 flow [2024-06-14 13:58:07,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:58:07,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:58:07,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 239 transitions. [2024-06-14 13:58:07,484 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5829268292682926 [2024-06-14 13:58:07,484 INFO L175 Difference]: Start difference. First operand has 342 places, 369 transitions, 4493 flow. Second operand 10 states and 239 transitions. [2024-06-14 13:58:07,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 412 transitions, 5513 flow [2024-06-14 13:58:11,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 412 transitions, 5317 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-14 13:58:11,644 INFO L231 Difference]: Finished difference. Result has 347 places, 369 transitions, 4533 flow [2024-06-14 13:58:11,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4297, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4533, PETRI_PLACES=347, PETRI_TRANSITIONS=369} [2024-06-14 13:58:11,644 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 305 predicate places. [2024-06-14 13:58:11,644 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 369 transitions, 4533 flow [2024-06-14 13:58:11,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:58:11,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:58:11,645 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:58:11,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-14 13:58:11,645 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:58:11,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:58:11,645 INFO L85 PathProgramCache]: Analyzing trace with hash 137375296, now seen corresponding path program 3 times [2024-06-14 13:58:11,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:58:11,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121005359] [2024-06-14 13:58:11,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:58:11,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:58:11,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:58:11,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:58:11,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:58:11,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121005359] [2024-06-14 13:58:11,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121005359] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:58:11,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:58:11,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:58:11,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031697379] [2024-06-14 13:58:11,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:58:11,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:58:11,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:58:11,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:58:11,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:58:11,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:58:11,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 369 transitions, 4533 flow. Second operand has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:58:11,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:58:11,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:58:11,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:58:12,827 INFO L124 PetriNetUnfolderBase]: 3292/5572 cut-off events. [2024-06-14 13:58:12,828 INFO L125 PetriNetUnfolderBase]: For 846791/846795 co-relation queries the response was YES. [2024-06-14 13:58:12,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42004 conditions, 5572 events. 3292/5572 cut-off events. For 846791/846795 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 37648 event pairs, 1015 based on Foata normal form. 8/5576 useless extension candidates. Maximal degree in co-relation 41846. Up to 4823 conditions per place. [2024-06-14 13:58:12,909 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 297 selfloop transitions, 88 changer transitions 0/391 dead transitions. [2024-06-14 13:58:12,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 391 transitions, 5381 flow [2024-06-14 13:58:12,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:58:12,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:58:12,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-14 13:58:12,910 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487804878048781 [2024-06-14 13:58:12,910 INFO L175 Difference]: Start difference. First operand has 347 places, 369 transitions, 4533 flow. Second operand 8 states and 180 transitions. [2024-06-14 13:58:12,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 391 transitions, 5381 flow [2024-06-14 13:58:17,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 391 transitions, 5111 flow, removed 30 selfloop flow, removed 9 redundant places. [2024-06-14 13:58:17,455 INFO L231 Difference]: Finished difference. Result has 346 places, 369 transitions, 4443 flow [2024-06-14 13:58:17,456 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4263, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4443, PETRI_PLACES=346, PETRI_TRANSITIONS=369} [2024-06-14 13:58:17,456 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 304 predicate places. [2024-06-14 13:58:17,456 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 369 transitions, 4443 flow [2024-06-14 13:58:17,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:58:17,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:58:17,456 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:58:17,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-14 13:58:17,456 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:58:17,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:58:17,457 INFO L85 PathProgramCache]: Analyzing trace with hash 85706288, now seen corresponding path program 2 times [2024-06-14 13:58:17,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:58:17,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506292972] [2024-06-14 13:58:17,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:58:17,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:58:17,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:58:17,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:58:17,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:58:17,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506292972] [2024-06-14 13:58:17,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506292972] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:58:17,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:58:17,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:58:17,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120789490] [2024-06-14 13:58:17,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:58:17,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:58:17,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:58:17,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:58:17,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:58:17,694 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:58:17,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 369 transitions, 4443 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:58:17,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:58:17,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:58:17,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:58:18,771 INFO L124 PetriNetUnfolderBase]: 3370/5723 cut-off events. [2024-06-14 13:58:18,771 INFO L125 PetriNetUnfolderBase]: For 980823/980825 co-relation queries the response was YES. [2024-06-14 13:58:18,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41756 conditions, 5723 events. 3370/5723 cut-off events. For 980823/980825 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 38994 event pairs, 1060 based on Foata normal form. 34/5754 useless extension candidates. Maximal degree in co-relation 41598. Up to 4923 conditions per place. [2024-06-14 13:58:18,855 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 303 selfloop transitions, 87 changer transitions 3/399 dead transitions. [2024-06-14 13:58:18,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 399 transitions, 5363 flow [2024-06-14 13:58:18,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:58:18,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:58:18,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 224 transitions. [2024-06-14 13:58:18,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5463414634146342 [2024-06-14 13:58:18,863 INFO L175 Difference]: Start difference. First operand has 346 places, 369 transitions, 4443 flow. Second operand 10 states and 224 transitions. [2024-06-14 13:58:18,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 399 transitions, 5363 flow [2024-06-14 13:58:22,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 399 transitions, 5137 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-14 13:58:22,480 INFO L231 Difference]: Finished difference. Result has 348 places, 369 transitions, 4427 flow [2024-06-14 13:58:22,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4217, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4427, PETRI_PLACES=348, PETRI_TRANSITIONS=369} [2024-06-14 13:58:22,491 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 306 predicate places. [2024-06-14 13:58:22,492 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 369 transitions, 4427 flow [2024-06-14 13:58:22,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:58:22,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:58:22,492 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:58:22,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-14 13:58:22,492 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:58:22,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:58:22,493 INFO L85 PathProgramCache]: Analyzing trace with hash 137375668, now seen corresponding path program 3 times [2024-06-14 13:58:22,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:58:22,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109115386] [2024-06-14 13:58:22,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:58:22,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:58:22,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:58:22,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:58:22,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:58:22,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109115386] [2024-06-14 13:58:22,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109115386] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:58:22,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:58:22,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:58:22,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467920998] [2024-06-14 13:58:22,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:58:22,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:58:22,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:58:22,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:58:22,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:58:22,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:58:22,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 369 transitions, 4427 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:58:22,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:58:22,701 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:58:22,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:58:23,742 INFO L124 PetriNetUnfolderBase]: 3382/5765 cut-off events. [2024-06-14 13:58:23,743 INFO L125 PetriNetUnfolderBase]: For 903244/903246 co-relation queries the response was YES. [2024-06-14 13:58:23,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40483 conditions, 5765 events. 3382/5765 cut-off events. For 903244/903246 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 39460 event pairs, 1024 based on Foata normal form. 30/5792 useless extension candidates. Maximal degree in co-relation 40324. Up to 4745 conditions per place. [2024-06-14 13:58:23,825 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 301 selfloop transitions, 92 changer transitions 6/405 dead transitions. [2024-06-14 13:58:23,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 405 transitions, 5363 flow [2024-06-14 13:58:23,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:58:23,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:58:23,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 246 transitions. [2024-06-14 13:58:23,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5454545454545454 [2024-06-14 13:58:23,826 INFO L175 Difference]: Start difference. First operand has 348 places, 369 transitions, 4427 flow. Second operand 11 states and 246 transitions. [2024-06-14 13:58:23,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 405 transitions, 5363 flow [2024-06-14 13:58:26,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 405 transitions, 5162 flow, removed 15 selfloop flow, removed 9 redundant places. [2024-06-14 13:58:26,983 INFO L231 Difference]: Finished difference. Result has 350 places, 368 transitions, 4405 flow [2024-06-14 13:58:26,984 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4226, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4405, PETRI_PLACES=350, PETRI_TRANSITIONS=368} [2024-06-14 13:58:26,984 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 308 predicate places. [2024-06-14 13:58:26,984 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 368 transitions, 4405 flow [2024-06-14 13:58:26,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:58:26,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:58:26,984 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:58:26,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-14 13:58:26,985 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:58:26,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:58:26,985 INFO L85 PathProgramCache]: Analyzing trace with hash -1433811972, now seen corresponding path program 13 times [2024-06-14 13:58:26,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:58:26,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004370130] [2024-06-14 13:58:26,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:58:26,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:58:26,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:58:27,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:58:27,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:58:27,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004370130] [2024-06-14 13:58:27,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004370130] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:58:27,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:58:27,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:58:27,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928506851] [2024-06-14 13:58:27,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:58:27,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:58:27,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:58:27,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:58:27,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:58:27,197 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:58:27,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 368 transitions, 4405 flow. Second operand has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:58:27,198 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:58:27,198 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:58:27,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:58:28,278 INFO L124 PetriNetUnfolderBase]: 3540/6016 cut-off events. [2024-06-14 13:58:28,278 INFO L125 PetriNetUnfolderBase]: For 966915/966919 co-relation queries the response was YES. [2024-06-14 13:58:28,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45188 conditions, 6016 events. 3540/6016 cut-off events. For 966915/966919 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 41393 event pairs, 1222 based on Foata normal form. 10/6018 useless extension candidates. Maximal degree in co-relation 45029. Up to 4845 conditions per place. [2024-06-14 13:58:28,362 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 237 selfloop transitions, 162 changer transitions 0/405 dead transitions. [2024-06-14 13:58:28,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 405 transitions, 5629 flow [2024-06-14 13:58:28,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:58:28,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:58:28,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-14 13:58:28,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884146341463414 [2024-06-14 13:58:28,363 INFO L175 Difference]: Start difference. First operand has 350 places, 368 transitions, 4405 flow. Second operand 8 states and 193 transitions. [2024-06-14 13:58:28,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 405 transitions, 5629 flow [2024-06-14 13:58:31,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 405 transitions, 5359 flow, removed 18 selfloop flow, removed 11 redundant places. [2024-06-14 13:58:31,476 INFO L231 Difference]: Finished difference. Result has 347 places, 370 transitions, 4547 flow [2024-06-14 13:58:31,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4137, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4547, PETRI_PLACES=347, PETRI_TRANSITIONS=370} [2024-06-14 13:58:31,477 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 305 predicate places. [2024-06-14 13:58:31,477 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 370 transitions, 4547 flow [2024-06-14 13:58:31,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:58:31,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:58:31,477 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, 1, 1] [2024-06-14 13:58:31,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-14 13:58:31,477 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:58:31,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:58:31,478 INFO L85 PathProgramCache]: Analyzing trace with hash -2136094084, now seen corresponding path program 14 times [2024-06-14 13:58:31,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:58:31,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061412930] [2024-06-14 13:58:31,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:58:31,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:58:31,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:58:31,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:58:31,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:58:31,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061412930] [2024-06-14 13:58:31,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061412930] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:58:31,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:58:31,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:58:31,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974639017] [2024-06-14 13:58:31,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:58:31,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:58:31,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:58:31,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:58:31,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:58:31,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:58:31,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 370 transitions, 4547 flow. Second operand has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:58:31,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:58:31,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:58:31,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:58:32,769 INFO L124 PetriNetUnfolderBase]: 3568/6060 cut-off events. [2024-06-14 13:58:32,769 INFO L125 PetriNetUnfolderBase]: For 968521/968525 co-relation queries the response was YES. [2024-06-14 13:58:32,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45545 conditions, 6060 events. 3568/6060 cut-off events. For 968521/968525 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 41753 event pairs, 1242 based on Foata normal form. 10/6062 useless extension candidates. Maximal degree in co-relation 45386. Up to 5266 conditions per place. [2024-06-14 13:58:32,856 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 229 selfloop transitions, 161 changer transitions 0/396 dead transitions. [2024-06-14 13:58:32,857 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 396 transitions, 5449 flow [2024-06-14 13:58:32,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:58:32,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:58:32,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 184 transitions. [2024-06-14 13:58:32,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-14 13:58:32,858 INFO L175 Difference]: Start difference. First operand has 347 places, 370 transitions, 4547 flow. Second operand 8 states and 184 transitions. [2024-06-14 13:58:32,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 396 transitions, 5449 flow [2024-06-14 13:58:37,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 396 transitions, 5205 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-14 13:58:37,359 INFO L231 Difference]: Finished difference. Result has 351 places, 371 transitions, 4674 flow [2024-06-14 13:58:37,359 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4309, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4674, PETRI_PLACES=351, PETRI_TRANSITIONS=371} [2024-06-14 13:58:37,360 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 309 predicate places. [2024-06-14 13:58:37,360 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 371 transitions, 4674 flow [2024-06-14 13:58:37,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:58:37,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:58:37,360 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:58:37,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-14 13:58:37,360 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:58:37,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:58:37,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1849206754, now seen corresponding path program 15 times [2024-06-14 13:58:37,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:58:37,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785231669] [2024-06-14 13:58:37,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:58:37,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:58:37,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:58:37,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:58:37,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:58:37,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785231669] [2024-06-14 13:58:37,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785231669] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:58:37,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:58:37,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:58:37,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835328941] [2024-06-14 13:58:37,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:58:37,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:58:37,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:58:37,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:58:37,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:58:37,583 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:58:37,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 371 transitions, 4674 flow. Second operand has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:58:37,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:58:37,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:58:37,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:58:38,712 INFO L124 PetriNetUnfolderBase]: 3596/6104 cut-off events. [2024-06-14 13:58:38,712 INFO L125 PetriNetUnfolderBase]: For 984541/984545 co-relation queries the response was YES. [2024-06-14 13:58:38,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46083 conditions, 6104 events. 3596/6104 cut-off events. For 984541/984545 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 42130 event pairs, 1246 based on Foata normal form. 10/6106 useless extension candidates. Maximal degree in co-relation 45922. Up to 5310 conditions per place. [2024-06-14 13:58:38,794 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 230 selfloop transitions, 158 changer transitions 0/394 dead transitions. [2024-06-14 13:58:38,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 394 transitions, 5560 flow [2024-06-14 13:58:38,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:58:38,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:58:38,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 181 transitions. [2024-06-14 13:58:38,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.551829268292683 [2024-06-14 13:58:38,795 INFO L175 Difference]: Start difference. First operand has 351 places, 371 transitions, 4674 flow. Second operand 8 states and 181 transitions. [2024-06-14 13:58:38,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 394 transitions, 5560 flow [2024-06-14 13:58:43,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 394 transitions, 5211 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-14 13:58:43,144 INFO L231 Difference]: Finished difference. Result has 353 places, 372 transitions, 4686 flow [2024-06-14 13:58:43,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4325, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4686, PETRI_PLACES=353, PETRI_TRANSITIONS=372} [2024-06-14 13:58:43,144 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 311 predicate places. [2024-06-14 13:58:43,145 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 372 transitions, 4686 flow [2024-06-14 13:58:43,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:58:43,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:58:43,145 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:58:43,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-14 13:58:43,145 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:58:43,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:58:43,145 INFO L85 PathProgramCache]: Analyzing trace with hash -704841698, now seen corresponding path program 16 times [2024-06-14 13:58:43,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:58:43,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997884273] [2024-06-14 13:58:43,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:58:43,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:58:43,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:58:43,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:58:43,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:58:43,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997884273] [2024-06-14 13:58:43,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997884273] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:58:43,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:58:43,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:58:43,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137799544] [2024-06-14 13:58:43,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:58:43,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:58:43,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:58:43,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:58:43,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:58:43,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:58:43,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 372 transitions, 4686 flow. Second operand has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:58:43,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:58:43,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:58:43,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:58:44,434 INFO L124 PetriNetUnfolderBase]: 3624/6148 cut-off events. [2024-06-14 13:58:44,434 INFO L125 PetriNetUnfolderBase]: For 1002919/1002923 co-relation queries the response was YES. [2024-06-14 13:58:44,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46457 conditions, 6148 events. 3624/6148 cut-off events. For 1002919/1002923 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 42448 event pairs, 1250 based on Foata normal form. 10/6150 useless extension candidates. Maximal degree in co-relation 46295. Up to 5354 conditions per place. [2024-06-14 13:58:44,520 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 227 selfloop transitions, 159 changer transitions 0/392 dead transitions. [2024-06-14 13:58:44,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 392 transitions, 5562 flow [2024-06-14 13:58:44,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:58:44,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:58:44,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 176 transitions. [2024-06-14 13:58:44,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-06-14 13:58:44,521 INFO L175 Difference]: Start difference. First operand has 353 places, 372 transitions, 4686 flow. Second operand 8 states and 176 transitions. [2024-06-14 13:58:44,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 392 transitions, 5562 flow [2024-06-14 13:58:48,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 392 transitions, 5217 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-14 13:58:48,740 INFO L231 Difference]: Finished difference. Result has 355 places, 373 transitions, 4706 flow [2024-06-14 13:58:48,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4341, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4706, PETRI_PLACES=355, PETRI_TRANSITIONS=373} [2024-06-14 13:58:48,741 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 313 predicate places. [2024-06-14 13:58:48,741 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 373 transitions, 4706 flow [2024-06-14 13:58:48,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:58:48,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:58:48,741 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:58:48,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-14 13:58:48,742 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:58:48,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:58:48,742 INFO L85 PathProgramCache]: Analyzing trace with hash -35268578, now seen corresponding path program 17 times [2024-06-14 13:58:48,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:58:48,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517123888] [2024-06-14 13:58:48,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:58:48,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:58:48,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:58:48,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:58:48,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:58:48,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517123888] [2024-06-14 13:58:48,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517123888] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:58:48,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:58:48,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:58:48,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261151662] [2024-06-14 13:58:48,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:58:48,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:58:48,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:58:48,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:58:48,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:58:48,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:58:48,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 373 transitions, 4706 flow. Second operand has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:58:48,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:58:48,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:58:48,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:58:50,061 INFO L124 PetriNetUnfolderBase]: 3555/6051 cut-off events. [2024-06-14 13:58:50,061 INFO L125 PetriNetUnfolderBase]: For 968243/968247 co-relation queries the response was YES. [2024-06-14 13:58:50,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42127 conditions, 6051 events. 3555/6051 cut-off events. For 968243/968247 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 41854 event pairs, 1152 based on Foata normal form. 36/6085 useless extension candidates. Maximal degree in co-relation 41964. Up to 5106 conditions per place. [2024-06-14 13:58:50,145 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 294 selfloop transitions, 100 changer transitions 3/403 dead transitions. [2024-06-14 13:58:50,145 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 403 transitions, 5600 flow [2024-06-14 13:58:50,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:58:50,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:58:50,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-14 13:58:50,146 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5823170731707317 [2024-06-14 13:58:50,146 INFO L175 Difference]: Start difference. First operand has 355 places, 373 transitions, 4706 flow. Second operand 8 states and 191 transitions. [2024-06-14 13:58:50,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 403 transitions, 5600 flow [2024-06-14 13:58:53,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 403 transitions, 5221 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-14 13:58:53,777 INFO L231 Difference]: Finished difference. Result has 357 places, 372 transitions, 4525 flow [2024-06-14 13:58:53,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4327, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4525, PETRI_PLACES=357, PETRI_TRANSITIONS=372} [2024-06-14 13:58:53,778 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 315 predicate places. [2024-06-14 13:58:53,778 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 372 transitions, 4525 flow [2024-06-14 13:58:53,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:58:53,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:58:53,778 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:58:53,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-14 13:58:53,778 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:58:53,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:58:53,779 INFO L85 PathProgramCache]: Analyzing trace with hash -254001604, now seen corresponding path program 4 times [2024-06-14 13:58:53,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:58:53,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199728080] [2024-06-14 13:58:53,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:58:53,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:58:53,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:58:53,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:58:53,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:58:53,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199728080] [2024-06-14 13:58:53,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199728080] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:58:53,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:58:53,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:58:53,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144499081] [2024-06-14 13:58:53,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:58:53,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:58:53,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:58:53,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:58:53,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:58:53,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:58:53,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 372 transitions, 4525 flow. Second operand has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:58:53,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:58:53,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:58:53,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:58:55,156 INFO L124 PetriNetUnfolderBase]: 3712/6318 cut-off events. [2024-06-14 13:58:55,156 INFO L125 PetriNetUnfolderBase]: For 995625/995629 co-relation queries the response was YES. [2024-06-14 13:58:55,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46422 conditions, 6318 events. 3712/6318 cut-off events. For 995625/995629 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 43833 event pairs, 1204 based on Foata normal form. 8/6316 useless extension candidates. Maximal degree in co-relation 46258. Up to 4668 conditions per place. [2024-06-14 13:58:55,248 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 236 selfloop transitions, 172 changer transitions 0/414 dead transitions. [2024-06-14 13:58:55,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 414 transitions, 5805 flow [2024-06-14 13:58:55,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:58:55,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:58:55,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-14 13:58:55,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.600609756097561 [2024-06-14 13:58:55,249 INFO L175 Difference]: Start difference. First operand has 357 places, 372 transitions, 4525 flow. Second operand 8 states and 197 transitions. [2024-06-14 13:58:55,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 414 transitions, 5805 flow [2024-06-14 13:59:00,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 414 transitions, 5583 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-14 13:59:00,490 INFO L231 Difference]: Finished difference. Result has 357 places, 374 transitions, 4739 flow [2024-06-14 13:59:00,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4305, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4739, PETRI_PLACES=357, PETRI_TRANSITIONS=374} [2024-06-14 13:59:00,490 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 315 predicate places. [2024-06-14 13:59:00,490 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 374 transitions, 4739 flow [2024-06-14 13:59:00,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:59:00,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:59:00,490 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, 1] [2024-06-14 13:59:00,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-14 13:59:00,491 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:59:00,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:59:00,491 INFO L85 PathProgramCache]: Analyzing trace with hash -1937556940, now seen corresponding path program 4 times [2024-06-14 13:59:00,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:59:00,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074793158] [2024-06-14 13:59:00,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:59:00,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:59:00,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:59:00,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:59:00,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:59:00,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074793158] [2024-06-14 13:59:00,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074793158] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:59:00,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:59:00,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:59:00,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376915236] [2024-06-14 13:59:00,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:59:00,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:59:00,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:59:00,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:59:00,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:59:00,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:59:00,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 374 transitions, 4739 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:59:00,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:59:00,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:59:00,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:59:01,951 INFO L124 PetriNetUnfolderBase]: 3732/6316 cut-off events. [2024-06-14 13:59:01,951 INFO L125 PetriNetUnfolderBase]: For 999673/999675 co-relation queries the response was YES. [2024-06-14 13:59:02,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46935 conditions, 6316 events. 3732/6316 cut-off events. For 999673/999675 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 43700 event pairs, 1278 based on Foata normal form. 6/6317 useless extension candidates. Maximal degree in co-relation 46771. Up to 5432 conditions per place. [2024-06-14 13:59:02,045 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 214 selfloop transitions, 188 changer transitions 0/408 dead transitions. [2024-06-14 13:59:02,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 408 transitions, 5691 flow [2024-06-14 13:59:02,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:59:02,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:59:02,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 210 transitions. [2024-06-14 13:59:02,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5691056910569106 [2024-06-14 13:59:02,046 INFO L175 Difference]: Start difference. First operand has 357 places, 374 transitions, 4739 flow. Second operand 9 states and 210 transitions. [2024-06-14 13:59:02,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 408 transitions, 5691 flow [2024-06-14 13:59:07,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 408 transitions, 5309 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-14 13:59:07,205 INFO L231 Difference]: Finished difference. Result has 361 places, 375 transitions, 4781 flow [2024-06-14 13:59:07,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4357, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=187, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4781, PETRI_PLACES=361, PETRI_TRANSITIONS=375} [2024-06-14 13:59:07,205 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 319 predicate places. [2024-06-14 13:59:07,205 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 375 transitions, 4781 flow [2024-06-14 13:59:07,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:59:07,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:59:07,206 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:59:07,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-14 13:59:07,206 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:59:07,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:59:07,206 INFO L85 PathProgramCache]: Analyzing trace with hash -1226704320, now seen corresponding path program 5 times [2024-06-14 13:59:07,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:59:07,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909941322] [2024-06-14 13:59:07,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:59:07,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:59:07,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:59:07,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:59:07,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:59:07,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909941322] [2024-06-14 13:59:07,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909941322] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:59:07,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:59:07,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:59:07,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943634422] [2024-06-14 13:59:07,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:59:07,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:59:07,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:59:07,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:59:07,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:59:07,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:59:07,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 375 transitions, 4781 flow. Second operand has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:59:07,440 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:59:07,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:59:07,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:59:08,599 INFO L124 PetriNetUnfolderBase]: 3752/6382 cut-off events. [2024-06-14 13:59:08,599 INFO L125 PetriNetUnfolderBase]: For 1015720/1015724 co-relation queries the response was YES. [2024-06-14 13:59:08,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47178 conditions, 6382 events. 3752/6382 cut-off events. For 1015720/1015724 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 44392 event pairs, 1286 based on Foata normal form. 8/6378 useless extension candidates. Maximal degree in co-relation 47013. Up to 4712 conditions per place. [2024-06-14 13:59:08,691 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 235 selfloop transitions, 170 changer transitions 0/411 dead transitions. [2024-06-14 13:59:08,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 411 transitions, 5989 flow [2024-06-14 13:59:08,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:59:08,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:59:08,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-14 13:59:08,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-14 13:59:08,692 INFO L175 Difference]: Start difference. First operand has 361 places, 375 transitions, 4781 flow. Second operand 8 states and 192 transitions. [2024-06-14 13:59:08,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 411 transitions, 5989 flow [2024-06-14 13:59:14,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 411 transitions, 5581 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-14 13:59:14,134 INFO L231 Difference]: Finished difference. Result has 362 places, 376 transitions, 4753 flow [2024-06-14 13:59:14,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4373, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4753, PETRI_PLACES=362, PETRI_TRANSITIONS=376} [2024-06-14 13:59:14,135 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 320 predicate places. [2024-06-14 13:59:14,135 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 376 transitions, 4753 flow [2024-06-14 13:59:14,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:59:14,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:59:14,135 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:59:14,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-14 13:59:14,135 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:59:14,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:59:14,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1848991552, now seen corresponding path program 6 times [2024-06-14 13:59:14,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:59:14,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672818463] [2024-06-14 13:59:14,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:59:14,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:59:14,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:59:14,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:59:14,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:59:14,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672818463] [2024-06-14 13:59:14,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672818463] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:59:14,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:59:14,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:59:14,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585265309] [2024-06-14 13:59:14,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:59:14,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:59:14,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:59:14,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:59:14,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:59:14,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:59:14,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 376 transitions, 4753 flow. Second operand has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:59:14,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:59:14,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:59:14,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:59:15,557 INFO L124 PetriNetUnfolderBase]: 3772/6424 cut-off events. [2024-06-14 13:59:15,557 INFO L125 PetriNetUnfolderBase]: For 1031973/1031977 co-relation queries the response was YES. [2024-06-14 13:59:15,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47460 conditions, 6424 events. 3772/6424 cut-off events. For 1031973/1031977 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 44844 event pairs, 1326 based on Foata normal form. 8/6424 useless extension candidates. Maximal degree in co-relation 47294. Up to 5540 conditions per place. [2024-06-14 13:59:15,651 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 236 selfloop transitions, 160 changer transitions 0/402 dead transitions. [2024-06-14 13:59:15,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 402 transitions, 5669 flow [2024-06-14 13:59:15,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:59:15,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:59:15,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-14 13:59:15,653 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5579268292682927 [2024-06-14 13:59:15,653 INFO L175 Difference]: Start difference. First operand has 362 places, 376 transitions, 4753 flow. Second operand 8 states and 183 transitions. [2024-06-14 13:59:15,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 402 transitions, 5669 flow [2024-06-14 13:59:20,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 402 transitions, 5329 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-14 13:59:20,908 INFO L231 Difference]: Finished difference. Result has 365 places, 377 transitions, 4777 flow [2024-06-14 13:59:20,908 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4414, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4777, PETRI_PLACES=365, PETRI_TRANSITIONS=377} [2024-06-14 13:59:20,908 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 323 predicate places. [2024-06-14 13:59:20,909 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 377 transitions, 4777 flow [2024-06-14 13:59:20,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:59:20,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:59:20,909 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, 1] [2024-06-14 13:59:20,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-14 13:59:20,909 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:59:20,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:59:20,909 INFO L85 PathProgramCache]: Analyzing trace with hash -1551341520, now seen corresponding path program 5 times [2024-06-14 13:59:20,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:59:20,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408863389] [2024-06-14 13:59:20,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:59:20,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:59:20,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:59:21,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:59:21,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:59:21,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408863389] [2024-06-14 13:59:21,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408863389] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:59:21,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:59:21,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:59:21,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466346768] [2024-06-14 13:59:21,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:59:21,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:59:21,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:59:21,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:59:21,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:59:21,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:59:21,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 377 transitions, 4777 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:59:21,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:59:21,134 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:59:21,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:59:22,425 INFO L124 PetriNetUnfolderBase]: 3800/6455 cut-off events. [2024-06-14 13:59:22,425 INFO L125 PetriNetUnfolderBase]: For 1063858/1063860 co-relation queries the response was YES. [2024-06-14 13:59:22,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47829 conditions, 6455 events. 3800/6455 cut-off events. For 1063858/1063860 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 45112 event pairs, 1323 based on Foata normal form. 8/6458 useless extension candidates. Maximal degree in co-relation 47662. Up to 5646 conditions per place. [2024-06-14 13:59:22,530 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 221 selfloop transitions, 177 changer transitions 0/404 dead transitions. [2024-06-14 13:59:22,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 404 transitions, 5699 flow [2024-06-14 13:59:22,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:59:22,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:59:22,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 204 transitions. [2024-06-14 13:59:22,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5528455284552846 [2024-06-14 13:59:22,532 INFO L175 Difference]: Start difference. First operand has 365 places, 377 transitions, 4777 flow. Second operand 9 states and 204 transitions. [2024-06-14 13:59:22,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 404 transitions, 5699 flow [2024-06-14 13:59:28,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 404 transitions, 5351 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-14 13:59:28,329 INFO L231 Difference]: Finished difference. Result has 368 places, 378 transitions, 4834 flow [2024-06-14 13:59:28,330 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4429, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=176, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4834, PETRI_PLACES=368, PETRI_TRANSITIONS=378} [2024-06-14 13:59:28,330 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 326 predicate places. [2024-06-14 13:59:28,330 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 378 transitions, 4834 flow [2024-06-14 13:59:28,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:59:28,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:59:28,330 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:59:28,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-14 13:59:28,331 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:59:28,331 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:59:28,331 INFO L85 PathProgramCache]: Analyzing trace with hash 1425400452, now seen corresponding path program 6 times [2024-06-14 13:59:28,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:59:28,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750618457] [2024-06-14 13:59:28,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:59:28,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:59:28,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:59:28,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:59:28,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:59:28,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750618457] [2024-06-14 13:59:28,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750618457] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:59:28,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:59:28,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:59:28,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435119615] [2024-06-14 13:59:28,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:59:28,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:59:28,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:59:28,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:59:28,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:59:28,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:59:28,565 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 378 transitions, 4834 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:59:28,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:59:28,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:59:28,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:59:29,850 INFO L124 PetriNetUnfolderBase]: 3820/6489 cut-off events. [2024-06-14 13:59:29,851 INFO L125 PetriNetUnfolderBase]: For 1069297/1069299 co-relation queries the response was YES. [2024-06-14 13:59:29,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48211 conditions, 6489 events. 3820/6489 cut-off events. For 1069297/1069299 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 45367 event pairs, 1321 based on Foata normal form. 6/6490 useless extension candidates. Maximal degree in co-relation 48043. Up to 5648 conditions per place. [2024-06-14 13:59:29,953 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 223 selfloop transitions, 180 changer transitions 0/409 dead transitions. [2024-06-14 13:59:29,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 409 transitions, 5784 flow [2024-06-14 13:59:29,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:59:29,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:59:29,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 223 transitions. [2024-06-14 13:59:29,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5439024390243903 [2024-06-14 13:59:29,954 INFO L175 Difference]: Start difference. First operand has 368 places, 378 transitions, 4834 flow. Second operand 10 states and 223 transitions. [2024-06-14 13:59:29,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 409 transitions, 5784 flow [2024-06-14 13:59:36,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 409 transitions, 5397 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-14 13:59:36,374 INFO L231 Difference]: Finished difference. Result has 371 places, 379 transitions, 4859 flow [2024-06-14 13:59:36,374 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4447, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4859, PETRI_PLACES=371, PETRI_TRANSITIONS=379} [2024-06-14 13:59:36,374 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 329 predicate places. [2024-06-14 13:59:36,375 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 379 transitions, 4859 flow [2024-06-14 13:59:36,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:59:36,375 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:59:36,375 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:59:36,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-14 13:59:36,375 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:59:36,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:59:36,375 INFO L85 PathProgramCache]: Analyzing trace with hash -1026127590, now seen corresponding path program 7 times [2024-06-14 13:59:36,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:59:36,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935097999] [2024-06-14 13:59:36,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:59:36,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:59:36,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:59:36,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:59:36,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:59:36,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935097999] [2024-06-14 13:59:36,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935097999] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:59:36,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:59:36,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:59:36,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901929411] [2024-06-14 13:59:36,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:59:36,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:59:36,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:59:36,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:59:36,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:59:36,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:59:36,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 379 transitions, 4859 flow. Second operand has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:59:36,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:59:36,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:59:36,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:59:37,946 INFO L124 PetriNetUnfolderBase]: 4081/6943 cut-off events. [2024-06-14 13:59:37,947 INFO L125 PetriNetUnfolderBase]: For 1423611/1423615 co-relation queries the response was YES. [2024-06-14 13:59:38,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55725 conditions, 6943 events. 4081/6943 cut-off events. For 1423611/1423615 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 49012 event pairs, 1194 based on Foata normal form. 8/6931 useless extension candidates. Maximal degree in co-relation 55556. Up to 3279 conditions per place. [2024-06-14 13:59:38,054 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 220 selfloop transitions, 199 changer transitions 0/425 dead transitions. [2024-06-14 13:59:38,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 425 transitions, 6393 flow [2024-06-14 13:59:38,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:59:38,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:59:38,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-14 13:59:38,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-14 13:59:38,055 INFO L175 Difference]: Start difference. First operand has 371 places, 379 transitions, 4859 flow. Second operand 8 states and 200 transitions. [2024-06-14 13:59:38,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 425 transitions, 6393 flow [2024-06-14 13:59:43,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 425 transitions, 5997 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-06-14 13:59:43,154 INFO L231 Difference]: Finished difference. Result has 371 places, 380 transitions, 4907 flow [2024-06-14 13:59:43,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4463, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=198, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4907, PETRI_PLACES=371, PETRI_TRANSITIONS=380} [2024-06-14 13:59:43,155 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 329 predicate places. [2024-06-14 13:59:43,155 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 380 transitions, 4907 flow [2024-06-14 13:59:43,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:59:43,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:59:43,155 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:59:43,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-14 13:59:43,155 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:59:43,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:59:43,156 INFO L85 PathProgramCache]: Analyzing trace with hash 325458620, now seen corresponding path program 8 times [2024-06-14 13:59:43,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:59:43,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784947081] [2024-06-14 13:59:43,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:59:43,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:59:43,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:59:43,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:59:43,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:59:43,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784947081] [2024-06-14 13:59:43,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784947081] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:59:43,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:59:43,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:59:43,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879288155] [2024-06-14 13:59:43,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:59:43,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:59:43,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:59:43,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:59:43,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:59:43,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:59:43,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 380 transitions, 4907 flow. Second operand has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:59:43,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:59:43,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:59:43,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:59:44,706 INFO L124 PetriNetUnfolderBase]: 4101/6979 cut-off events. [2024-06-14 13:59:44,707 INFO L125 PetriNetUnfolderBase]: For 1449118/1449122 co-relation queries the response was YES. [2024-06-14 13:59:44,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56462 conditions, 6979 events. 4101/6979 cut-off events. For 1449118/1449122 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 49305 event pairs, 1194 based on Foata normal form. 8/6967 useless extension candidates. Maximal degree in co-relation 56292. Up to 3291 conditions per place. [2024-06-14 13:59:44,817 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 220 selfloop transitions, 196 changer transitions 0/422 dead transitions. [2024-06-14 13:59:44,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 422 transitions, 6419 flow [2024-06-14 13:59:44,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:59:44,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:59:44,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-14 13:59:44,818 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5975609756097561 [2024-06-14 13:59:44,818 INFO L175 Difference]: Start difference. First operand has 371 places, 380 transitions, 4907 flow. Second operand 8 states and 196 transitions. [2024-06-14 13:59:44,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 422 transitions, 6419 flow [2024-06-14 13:59:49,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 422 transitions, 5786 flow, removed 27 selfloop flow, removed 8 redundant places. [2024-06-14 13:59:49,324 INFO L231 Difference]: Finished difference. Result has 371 places, 381 transitions, 4714 flow [2024-06-14 13:59:49,324 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4283, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=195, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4714, PETRI_PLACES=371, PETRI_TRANSITIONS=381} [2024-06-14 13:59:49,325 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 329 predicate places. [2024-06-14 13:59:49,325 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 381 transitions, 4714 flow [2024-06-14 13:59:49,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:59:49,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:59:49,325 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:59:49,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-14 13:59:49,325 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:59:49,326 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:59:49,326 INFO L85 PathProgramCache]: Analyzing trace with hash -5541324, now seen corresponding path program 7 times [2024-06-14 13:59:49,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:59:49,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642511788] [2024-06-14 13:59:49,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:59:49,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:59:49,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:59:49,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:59:49,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:59:49,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642511788] [2024-06-14 13:59:49,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642511788] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:59:49,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:59:49,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:59:49,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511122632] [2024-06-14 13:59:49,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:59:49,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:59:49,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:59:49,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:59:49,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:59:49,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:59:49,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 381 transitions, 4714 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:59:49,571 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:59:49,571 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:59:49,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:59:50,929 INFO L124 PetriNetUnfolderBase]: 4121/6980 cut-off events. [2024-06-14 13:59:50,929 INFO L125 PetriNetUnfolderBase]: For 1476453/1476455 co-relation queries the response was YES. [2024-06-14 13:59:51,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55819 conditions, 6980 events. 4121/6980 cut-off events. For 1476453/1476455 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 49236 event pairs, 1095 based on Foata normal form. 6/6969 useless extension candidates. Maximal degree in co-relation 55651. Up to 5297 conditions per place. [2024-06-14 13:59:51,038 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 201 selfloop transitions, 215 changer transitions 0/422 dead transitions. [2024-06-14 13:59:51,039 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 422 transitions, 5980 flow [2024-06-14 13:59:51,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:59:51,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:59:51,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 216 transitions. [2024-06-14 13:59:51,040 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-14 13:59:51,040 INFO L175 Difference]: Start difference. First operand has 371 places, 381 transitions, 4714 flow. Second operand 9 states and 216 transitions. [2024-06-14 13:59:51,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 422 transitions, 5980 flow [2024-06-14 13:59:56,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 422 transitions, 5572 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-14 13:59:56,388 INFO L231 Difference]: Finished difference. Result has 375 places, 382 transitions, 4790 flow [2024-06-14 13:59:56,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4306, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=214, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4790, PETRI_PLACES=375, PETRI_TRANSITIONS=382} [2024-06-14 13:59:56,388 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 333 predicate places. [2024-06-14 13:59:56,388 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 382 transitions, 4790 flow [2024-06-14 13:59:56,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:59:56,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:59:56,389 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, 1] [2024-06-14 13:59:56,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-14 13:59:56,389 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:59:56,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:59:56,389 INFO L85 PathProgramCache]: Analyzing trace with hash -671853948, now seen corresponding path program 8 times [2024-06-14 13:59:56,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:59:56,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044508791] [2024-06-14 13:59:56,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:59:56,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:59:56,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:59:56,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:59:56,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:59:56,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044508791] [2024-06-14 13:59:56,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044508791] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:59:56,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:59:56,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:59:56,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549559312] [2024-06-14 13:59:56,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:59:56,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:59:56,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:59:56,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:59:56,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:59:56,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:59:56,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 382 transitions, 4790 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:59:56,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:59:56,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:59:56,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:59:57,990 INFO L124 PetriNetUnfolderBase]: 4014/6801 cut-off events. [2024-06-14 13:59:57,990 INFO L125 PetriNetUnfolderBase]: For 1317648/1317650 co-relation queries the response was YES. [2024-06-14 13:59:58,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52383 conditions, 6801 events. 4014/6801 cut-off events. For 1317648/1317650 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 47690 event pairs, 1069 based on Foata normal form. 6/6790 useless extension candidates. Maximal degree in co-relation 52214. Up to 5124 conditions per place. [2024-06-14 13:59:58,095 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 197 selfloop transitions, 214 changer transitions 2/419 dead transitions. [2024-06-14 13:59:58,095 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 419 transitions, 6032 flow [2024-06-14 13:59:58,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:59:58,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:59:58,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 212 transitions. [2024-06-14 13:59:58,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5745257452574526 [2024-06-14 13:59:58,096 INFO L175 Difference]: Start difference. First operand has 375 places, 382 transitions, 4790 flow. Second operand 9 states and 212 transitions. [2024-06-14 13:59:58,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 419 transitions, 6032 flow [2024-06-14 14:00:04,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 419 transitions, 5564 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-14 14:00:04,484 INFO L231 Difference]: Finished difference. Result has 377 places, 383 transitions, 4806 flow [2024-06-14 14:00:04,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4322, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=213, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4806, PETRI_PLACES=377, PETRI_TRANSITIONS=383} [2024-06-14 14:00:04,484 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 335 predicate places. [2024-06-14 14:00:04,484 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 383 transitions, 4806 flow [2024-06-14 14:00:04,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:00:04,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:00:04,485 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, 1] [2024-06-14 14:00:04,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-14 14:00:04,485 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:00:04,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:00:04,485 INFO L85 PathProgramCache]: Analyzing trace with hash -671854320, now seen corresponding path program 9 times [2024-06-14 14:00:04,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:00:04,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7167822] [2024-06-14 14:00:04,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:00:04,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:00:04,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:00:04,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:00:04,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:00:04,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7167822] [2024-06-14 14:00:04,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7167822] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:00:04,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:00:04,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:00:04,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336411173] [2024-06-14 14:00:04,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:00:04,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:00:04,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:00:04,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:00:04,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:00:04,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:00:04,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 383 transitions, 4806 flow. Second operand has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:00:04,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:00:04,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:00:04,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:00:06,086 INFO L124 PetriNetUnfolderBase]: 4161/7083 cut-off events. [2024-06-14 14:00:06,087 INFO L125 PetriNetUnfolderBase]: For 1522081/1522085 co-relation queries the response was YES. [2024-06-14 14:00:06,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56533 conditions, 7083 events. 4161/7083 cut-off events. For 1522081/1522085 co-relation queries the response was YES. Maximal size of possible extension queue 488. Compared 50229 event pairs, 1233 based on Foata normal form. 8/7071 useless extension candidates. Maximal degree in co-relation 56363. Up to 3367 conditions per place. [2024-06-14 14:00:06,199 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 210 selfloop transitions, 201 changer transitions 0/417 dead transitions. [2024-06-14 14:00:06,199 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 417 transitions, 6036 flow [2024-06-14 14:00:06,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:00:06,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:00:06,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-14 14:00:06,200 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.573170731707317 [2024-06-14 14:00:06,200 INFO L175 Difference]: Start difference. First operand has 377 places, 383 transitions, 4806 flow. Second operand 8 states and 188 transitions. [2024-06-14 14:00:06,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 417 transitions, 6036 flow [2024-06-14 14:00:11,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 417 transitions, 5568 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-14 14:00:11,652 INFO L231 Difference]: Finished difference. Result has 378 places, 384 transitions, 4780 flow [2024-06-14 14:00:11,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4338, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=200, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4780, PETRI_PLACES=378, PETRI_TRANSITIONS=384} [2024-06-14 14:00:11,653 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 336 predicate places. [2024-06-14 14:00:11,653 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 384 transitions, 4780 flow [2024-06-14 14:00:11,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:00:11,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:00:11,653 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:00:11,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-14 14:00:11,653 INFO L420 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:00:11,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:00:11,654 INFO L85 PathProgramCache]: Analyzing trace with hash 349137426, now seen corresponding path program 9 times [2024-06-14 14:00:11,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:00:11,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415294823] [2024-06-14 14:00:11,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:00:11,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:00:11,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:00:11,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:00:11,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:00:11,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415294823] [2024-06-14 14:00:11,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415294823] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:00:11,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:00:11,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:00:11,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018624139] [2024-06-14 14:00:11,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:00:11,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:00:11,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:00:11,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:00:11,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:00:11,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:00:11,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 384 transitions, 4780 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:00:11,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:00:11,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:00:11,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:00:13,363 INFO L124 PetriNetUnfolderBase]: 4181/7084 cut-off events. [2024-06-14 14:00:13,363 INFO L125 PetriNetUnfolderBase]: For 1552665/1552667 co-relation queries the response was YES. [2024-06-14 14:00:13,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56974 conditions, 7084 events. 4181/7084 cut-off events. For 1552665/1552667 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 50117 event pairs, 1113 based on Foata normal form. 6/7077 useless extension candidates. Maximal degree in co-relation 56803. Up to 5169 conditions per place. [2024-06-14 14:00:13,465 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 197 selfloop transitions, 218 changer transitions 4/425 dead transitions. [2024-06-14 14:00:13,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 425 transitions, 6064 flow [2024-06-14 14:00:13,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:00:13,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:00:13,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 216 transitions. [2024-06-14 14:00:13,467 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-14 14:00:13,467 INFO L175 Difference]: Start difference. First operand has 378 places, 384 transitions, 4780 flow. Second operand 9 states and 216 transitions. [2024-06-14 14:00:13,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 425 transitions, 6064 flow [2024-06-14 14:00:20,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 425 transitions, 5721 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-14 14:00:20,587 INFO L231 Difference]: Finished difference. Result has 382 places, 385 transitions, 4931 flow [2024-06-14 14:00:20,588 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4437, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=217, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4931, PETRI_PLACES=382, PETRI_TRANSITIONS=385} [2024-06-14 14:00:20,588 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 340 predicate places. [2024-06-14 14:00:20,588 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 385 transitions, 4931 flow [2024-06-14 14:00:20,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:00:20,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:00:20,588 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:00:20,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-14 14:00:20,589 INFO L420 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:00:20,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:00:20,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1612113328, now seen corresponding path program 10 times [2024-06-14 14:00:20,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:00:20,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311331329] [2024-06-14 14:00:20,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:00:20,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:00:20,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:00:20,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:00:20,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:00:20,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311331329] [2024-06-14 14:00:20,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311331329] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:00:20,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:00:20,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:00:20,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384271668] [2024-06-14 14:00:20,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:00:20,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:00:20,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:00:20,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:00:20,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:00:20,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:00:20,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 385 transitions, 4931 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:00:20,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:00:20,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:00:20,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:00:22,199 INFO L124 PetriNetUnfolderBase]: 4209/7154 cut-off events. [2024-06-14 14:00:22,199 INFO L125 PetriNetUnfolderBase]: For 1599982/1599984 co-relation queries the response was YES. [2024-06-14 14:00:22,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57682 conditions, 7154 events. 4209/7154 cut-off events. For 1599982/1599984 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 51038 event pairs, 1542 based on Foata normal form. 8/7157 useless extension candidates. Maximal degree in co-relation 57510. Up to 6305 conditions per place. [2024-06-14 14:00:22,309 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 227 selfloop transitions, 176 changer transitions 0/409 dead transitions. [2024-06-14 14:00:22,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 409 transitions, 5865 flow [2024-06-14 14:00:22,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:00:22,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:00:22,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 200 transitions. [2024-06-14 14:00:22,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5420054200542005 [2024-06-14 14:00:22,310 INFO L175 Difference]: Start difference. First operand has 382 places, 385 transitions, 4931 flow. Second operand 9 states and 200 transitions. [2024-06-14 14:00:22,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 409 transitions, 5865 flow [2024-06-14 14:00:28,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 409 transitions, 5387 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-06-14 14:00:28,452 INFO L231 Difference]: Finished difference. Result has 384 places, 386 transitions, 4866 flow [2024-06-14 14:00:28,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4453, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4866, PETRI_PLACES=384, PETRI_TRANSITIONS=386} [2024-06-14 14:00:28,453 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 342 predicate places. [2024-06-14 14:00:28,453 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 386 transitions, 4866 flow [2024-06-14 14:00:28,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:00:28,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:00:28,453 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:00:28,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-14 14:00:28,454 INFO L420 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:00:28,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:00:28,454 INFO L85 PathProgramCache]: Analyzing trace with hash -1468701650, now seen corresponding path program 10 times [2024-06-14 14:00:28,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:00:28,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363245858] [2024-06-14 14:00:28,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:00:28,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:00:28,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:00:28,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:00:28,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:00:28,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363245858] [2024-06-14 14:00:28,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363245858] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:00:28,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:00:28,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:00:28,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554108894] [2024-06-14 14:00:28,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:00:28,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:00:28,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:00:28,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:00:28,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:00:28,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:00:28,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 386 transitions, 4866 flow. Second operand has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:00:28,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:00:28,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:00:28,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:00:30,031 INFO L124 PetriNetUnfolderBase]: 4229/7207 cut-off events. [2024-06-14 14:00:30,031 INFO L125 PetriNetUnfolderBase]: For 1608395/1608399 co-relation queries the response was YES. [2024-06-14 14:00:30,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57592 conditions, 7207 events. 4229/7207 cut-off events. For 1608395/1608399 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 51551 event pairs, 1557 based on Foata normal form. 8/7207 useless extension candidates. Maximal degree in co-relation 57419. Up to 6307 conditions per place. [2024-06-14 14:00:30,145 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 243 selfloop transitions, 160 changer transitions 0/409 dead transitions. [2024-06-14 14:00:30,145 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 409 transitions, 5789 flow [2024-06-14 14:00:30,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:00:30,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:00:30,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 179 transitions. [2024-06-14 14:00:30,146 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5457317073170732 [2024-06-14 14:00:30,146 INFO L175 Difference]: Start difference. First operand has 384 places, 386 transitions, 4866 flow. Second operand 8 states and 179 transitions. [2024-06-14 14:00:30,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 409 transitions, 5789 flow [2024-06-14 14:00:34,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 409 transitions, 5394 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-14 14:00:34,614 INFO L231 Difference]: Finished difference. Result has 385 places, 387 transitions, 4836 flow [2024-06-14 14:00:34,615 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4471, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4836, PETRI_PLACES=385, PETRI_TRANSITIONS=387} [2024-06-14 14:00:34,615 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 343 predicate places. [2024-06-14 14:00:34,615 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 387 transitions, 4836 flow [2024-06-14 14:00:34,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:00:34,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:00:34,615 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:00:34,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-14 14:00:34,616 INFO L420 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:00:34,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:00:34,616 INFO L85 PathProgramCache]: Analyzing trace with hash -438928844, now seen corresponding path program 11 times [2024-06-14 14:00:34,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:00:34,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619733041] [2024-06-14 14:00:34,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:00:34,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:00:34,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:00:34,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:00:34,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:00:34,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619733041] [2024-06-14 14:00:34,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619733041] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:00:34,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:00:34,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:00:34,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871871486] [2024-06-14 14:00:34,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:00:34,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:00:34,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:00:34,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:00:34,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:00:34,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:00:34,856 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 387 transitions, 4836 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:00:34,856 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:00:34,856 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:00:34,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:00:36,449 INFO L124 PetriNetUnfolderBase]: 4249/7198 cut-off events. [2024-06-14 14:00:36,449 INFO L125 PetriNetUnfolderBase]: For 1632361/1632363 co-relation queries the response was YES. [2024-06-14 14:00:36,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57781 conditions, 7198 events. 4249/7198 cut-off events. For 1632361/1632363 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 51270 event pairs, 1522 based on Foata normal form. 6/7191 useless extension candidates. Maximal degree in co-relation 57607. Up to 6323 conditions per place. [2024-06-14 14:00:36,550 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 221 selfloop transitions, 185 changer transitions 2/414 dead transitions. [2024-06-14 14:00:36,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 414 transitions, 5784 flow [2024-06-14 14:00:36,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:00:36,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:00:36,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 202 transitions. [2024-06-14 14:00:36,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5474254742547425 [2024-06-14 14:00:36,551 INFO L175 Difference]: Start difference. First operand has 385 places, 387 transitions, 4836 flow. Second operand 9 states and 202 transitions. [2024-06-14 14:00:36,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 414 transitions, 5784 flow [2024-06-14 14:00:41,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 414 transitions, 5434 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-14 14:00:41,880 INFO L231 Difference]: Finished difference. Result has 388 places, 388 transitions, 4918 flow [2024-06-14 14:00:41,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4486, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=184, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4918, PETRI_PLACES=388, PETRI_TRANSITIONS=388} [2024-06-14 14:00:41,880 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 346 predicate places. [2024-06-14 14:00:41,880 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 388 transitions, 4918 flow [2024-06-14 14:00:41,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:00:41,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:00:41,881 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:00:41,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-14 14:00:41,881 INFO L420 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:00:41,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:00:41,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1459504880, now seen corresponding path program 11 times [2024-06-14 14:00:41,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:00:41,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892875671] [2024-06-14 14:00:41,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:00:41,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:00:41,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:00:42,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:00:42,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:00:42,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892875671] [2024-06-14 14:00:42,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892875671] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:00:42,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:00:42,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:00:42,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849961372] [2024-06-14 14:00:42,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:00:42,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:00:42,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:00:42,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:00:42,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:00:42,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:00:42,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 388 transitions, 4918 flow. Second operand has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:00:42,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:00:42,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:00:42,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:00:43,480 INFO L124 PetriNetUnfolderBase]: 4269/7259 cut-off events. [2024-06-14 14:00:43,480 INFO L125 PetriNetUnfolderBase]: For 1658793/1658797 co-relation queries the response was YES. [2024-06-14 14:00:43,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58210 conditions, 7259 events. 4269/7259 cut-off events. For 1658793/1658797 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 51877 event pairs, 1547 based on Foata normal form. 8/7247 useless extension candidates. Maximal degree in co-relation 58035. Up to 6091 conditions per place. [2024-06-14 14:00:43,594 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 234 selfloop transitions, 172 changer transitions 0/412 dead transitions. [2024-06-14 14:00:43,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 412 transitions, 5847 flow [2024-06-14 14:00:43,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:00:43,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:00:43,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 179 transitions. [2024-06-14 14:00:43,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5457317073170732 [2024-06-14 14:00:43,596 INFO L175 Difference]: Start difference. First operand has 388 places, 388 transitions, 4918 flow. Second operand 8 states and 179 transitions. [2024-06-14 14:00:43,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 412 transitions, 5847 flow [2024-06-14 14:00:48,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 412 transitions, 5431 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-14 14:00:48,540 INFO L231 Difference]: Finished difference. Result has 389 places, 389 transitions, 4889 flow [2024-06-14 14:00:48,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4502, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4889, PETRI_PLACES=389, PETRI_TRANSITIONS=389} [2024-06-14 14:00:48,540 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 347 predicate places. [2024-06-14 14:00:48,541 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 389 transitions, 4889 flow [2024-06-14 14:00:48,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:00:48,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:00:48,541 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:00:48,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-14 14:00:48,541 INFO L420 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:00:48,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:00:48,542 INFO L85 PathProgramCache]: Analyzing trace with hash -704626124, now seen corresponding path program 12 times [2024-06-14 14:00:48,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:00:48,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486787036] [2024-06-14 14:00:48,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:00:48,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:00:48,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:00:48,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:00:48,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:00:48,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486787036] [2024-06-14 14:00:48,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486787036] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:00:48,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:00:48,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:00:48,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166331939] [2024-06-14 14:00:48,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:00:48,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:00:48,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:00:48,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:00:48,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:00:48,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:00:48,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 389 transitions, 4889 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:00:48,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:00:48,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:00:48,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:00:50,166 INFO L124 PetriNetUnfolderBase]: 4289/7292 cut-off events. [2024-06-14 14:00:50,166 INFO L125 PetriNetUnfolderBase]: For 1684142/1684144 co-relation queries the response was YES. [2024-06-14 14:00:50,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58633 conditions, 7292 events. 4289/7292 cut-off events. For 1684142/1684144 co-relation queries the response was YES. Maximal size of possible extension queue 512. Compared 52230 event pairs, 1558 based on Foata normal form. 6/7293 useless extension candidates. Maximal degree in co-relation 58457. Up to 6403 conditions per place. [2024-06-14 14:00:50,280 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 232 selfloop transitions, 179 changer transitions 0/417 dead transitions. [2024-06-14 14:00:50,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 417 transitions, 5859 flow [2024-06-14 14:00:50,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:00:50,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:00:50,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 219 transitions. [2024-06-14 14:00:50,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5341463414634147 [2024-06-14 14:00:50,281 INFO L175 Difference]: Start difference. First operand has 389 places, 389 transitions, 4889 flow. Second operand 10 states and 219 transitions. [2024-06-14 14:00:50,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 417 transitions, 5859 flow [2024-06-14 14:00:56,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 417 transitions, 5487 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-14 14:00:56,922 INFO L231 Difference]: Finished difference. Result has 393 places, 390 transitions, 4939 flow [2024-06-14 14:00:56,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4517, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=178, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4939, PETRI_PLACES=393, PETRI_TRANSITIONS=390} [2024-06-14 14:00:56,922 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 351 predicate places. [2024-06-14 14:00:56,922 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 390 transitions, 4939 flow [2024-06-14 14:00:56,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:00:56,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:00:56,923 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:00:56,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-14 14:00:56,923 INFO L420 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:00:56,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:00:56,923 INFO L85 PathProgramCache]: Analyzing trace with hash -1459088798, now seen corresponding path program 13 times [2024-06-14 14:00:56,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:00:56,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499612478] [2024-06-14 14:00:56,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:00:56,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:00:56,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:00:57,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:00:57,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:00:57,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499612478] [2024-06-14 14:00:57,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499612478] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:00:57,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:00:57,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:00:57,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239917192] [2024-06-14 14:00:57,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:00:57,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:00:57,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:00:57,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:00:57,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:00:57,155 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:00:57,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 390 transitions, 4939 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:00:57,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:00:57,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:00:57,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:00:58,960 INFO L124 PetriNetUnfolderBase]: 4355/7396 cut-off events. [2024-06-14 14:00:58,960 INFO L125 PetriNetUnfolderBase]: For 1784636/1784638 co-relation queries the response was YES. [2024-06-14 14:00:59,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60951 conditions, 7396 events. 4355/7396 cut-off events. For 1784636/1784638 co-relation queries the response was YES. Maximal size of possible extension queue 524. Compared 53087 event pairs, 1500 based on Foata normal form. 6/7397 useless extension candidates. Maximal degree in co-relation 60774. Up to 5951 conditions per place. [2024-06-14 14:00:59,065 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 224 selfloop transitions, 193 changer transitions 4/427 dead transitions. [2024-06-14 14:00:59,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 427 transitions, 6287 flow [2024-06-14 14:00:59,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:00:59,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:00:59,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 228 transitions. [2024-06-14 14:00:59,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5560975609756098 [2024-06-14 14:00:59,066 INFO L175 Difference]: Start difference. First operand has 393 places, 390 transitions, 4939 flow. Second operand 10 states and 228 transitions. [2024-06-14 14:00:59,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 427 transitions, 6287 flow [2024-06-14 14:01:06,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 427 transitions, 5881 flow, removed 25 selfloop flow, removed 8 redundant places. [2024-06-14 14:01:06,851 INFO L231 Difference]: Finished difference. Result has 395 places, 392 transitions, 5045 flow [2024-06-14 14:01:06,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4533, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=192, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5045, PETRI_PLACES=395, PETRI_TRANSITIONS=392} [2024-06-14 14:01:06,851 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 353 predicate places. [2024-06-14 14:01:06,851 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 392 transitions, 5045 flow [2024-06-14 14:01:06,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:06,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:01:06,851 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:01:06,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2024-06-14 14:01:06,852 INFO L420 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:01:06,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:01:06,852 INFO L85 PathProgramCache]: Analyzing trace with hash 405872048, now seen corresponding path program 14 times [2024-06-14 14:01:06,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:01:06,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833662234] [2024-06-14 14:01:06,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:01:06,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:01:06,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:07,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:01:07,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:07,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833662234] [2024-06-14 14:01:07,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833662234] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:07,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:07,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:01:07,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16697545] [2024-06-14 14:01:07,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:07,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:01:07,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:07,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:01:07,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:01:07,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:01:07,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 392 transitions, 5045 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:07,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:07,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:01:07,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:08,565 INFO L124 PetriNetUnfolderBase]: 4383/7460 cut-off events. [2024-06-14 14:01:08,565 INFO L125 PetriNetUnfolderBase]: For 1823856/1823858 co-relation queries the response was YES. [2024-06-14 14:01:08,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61678 conditions, 7460 events. 4383/7460 cut-off events. For 1823856/1823858 co-relation queries the response was YES. Maximal size of possible extension queue 530. Compared 53714 event pairs, 1626 based on Foata normal form. 8/7463 useless extension candidates. Maximal degree in co-relation 61500. Up to 6579 conditions per place. [2024-06-14 14:01:08,682 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 234 selfloop transitions, 176 changer transitions 0/416 dead transitions. [2024-06-14 14:01:08,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 416 transitions, 6001 flow [2024-06-14 14:01:08,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:01:08,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:01:08,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 201 transitions. [2024-06-14 14:01:08,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5447154471544715 [2024-06-14 14:01:08,684 INFO L175 Difference]: Start difference. First operand has 395 places, 392 transitions, 5045 flow. Second operand 9 states and 201 transitions. [2024-06-14 14:01:08,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 416 transitions, 6001 flow [2024-06-14 14:01:16,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 416 transitions, 5692 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-14 14:01:16,639 INFO L231 Difference]: Finished difference. Result has 398 places, 393 transitions, 5157 flow [2024-06-14 14:01:16,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4746, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5157, PETRI_PLACES=398, PETRI_TRANSITIONS=393} [2024-06-14 14:01:16,640 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 356 predicate places. [2024-06-14 14:01:16,640 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 393 transitions, 5157 flow [2024-06-14 14:01:16,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:16,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:01:16,640 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:01:16,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2024-06-14 14:01:16,641 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)] === [2024-06-14 14:01:16,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:01:16,641 INFO L85 PathProgramCache]: Analyzing trace with hash 414442928, now seen corresponding path program 15 times [2024-06-14 14:01:16,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:01:16,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666527458] [2024-06-14 14:01:16,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:01:16,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:01:16,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:16,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:01:16,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:16,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666527458] [2024-06-14 14:01:16,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666527458] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:16,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:16,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:01:16,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204552250] [2024-06-14 14:01:16,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:16,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:01:16,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:16,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:01:16,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:01:16,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:01:16,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 393 transitions, 5157 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:16,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:16,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:01:16,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:18,399 INFO L124 PetriNetUnfolderBase]: 4365/7434 cut-off events. [2024-06-14 14:01:18,400 INFO L125 PetriNetUnfolderBase]: For 1774516/1774518 co-relation queries the response was YES. [2024-06-14 14:01:18,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60396 conditions, 7434 events. 4365/7434 cut-off events. For 1774516/1774518 co-relation queries the response was YES. Maximal size of possible extension queue 527. Compared 53538 event pairs, 1602 based on Foata normal form. 8/7437 useless extension candidates. Maximal degree in co-relation 60216. Up to 6261 conditions per place. [2024-06-14 14:01:18,517 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 234 selfloop transitions, 180 changer transitions 2/422 dead transitions. [2024-06-14 14:01:18,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 422 transitions, 6103 flow [2024-06-14 14:01:18,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:01:18,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:01:18,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 206 transitions. [2024-06-14 14:01:18,518 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5582655826558266 [2024-06-14 14:01:18,518 INFO L175 Difference]: Start difference. First operand has 398 places, 393 transitions, 5157 flow. Second operand 9 states and 206 transitions. [2024-06-14 14:01:18,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 422 transitions, 6103 flow [2024-06-14 14:01:27,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 422 transitions, 5678 flow, removed 38 selfloop flow, removed 7 redundant places. [2024-06-14 14:01:27,423 INFO L231 Difference]: Finished difference. Result has 400 places, 393 transitions, 5096 flow [2024-06-14 14:01:27,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4732, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5096, PETRI_PLACES=400, PETRI_TRANSITIONS=393} [2024-06-14 14:01:27,424 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 358 predicate places. [2024-06-14 14:01:27,424 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 393 transitions, 5096 flow [2024-06-14 14:01:27,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:27,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:01:27,424 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:01:27,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2024-06-14 14:01:27,424 INFO L420 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:01:27,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:01:27,425 INFO L85 PathProgramCache]: Analyzing trace with hash -298340548, now seen corresponding path program 16 times [2024-06-14 14:01:27,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:01:27,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447755928] [2024-06-14 14:01:27,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:01:27,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:01:27,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:27,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:01:27,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:27,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447755928] [2024-06-14 14:01:27,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447755928] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:27,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:27,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:01:27,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922898540] [2024-06-14 14:01:27,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:27,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:01:27,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:27,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:01:27,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:01:27,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:01:27,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 393 transitions, 5096 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:27,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:27,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:01:27,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:29,166 INFO L124 PetriNetUnfolderBase]: 4347/7414 cut-off events. [2024-06-14 14:01:29,166 INFO L125 PetriNetUnfolderBase]: For 1731683/1731685 co-relation queries the response was YES. [2024-06-14 14:01:29,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58825 conditions, 7414 events. 4347/7414 cut-off events. For 1731683/1731685 co-relation queries the response was YES. Maximal size of possible extension queue 523. Compared 53370 event pairs, 1555 based on Foata normal form. 8/7419 useless extension candidates. Maximal degree in co-relation 58644. Up to 6778 conditions per place. [2024-06-14 14:01:29,283 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 367 selfloop transitions, 42 changer transitions 0/415 dead transitions. [2024-06-14 14:01:29,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 415 transitions, 5992 flow [2024-06-14 14:01:29,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:01:29,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:01:29,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 209 transitions. [2024-06-14 14:01:29,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5097560975609756 [2024-06-14 14:01:29,284 INFO L175 Difference]: Start difference. First operand has 400 places, 393 transitions, 5096 flow. Second operand 10 states and 209 transitions. [2024-06-14 14:01:29,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 415 transitions, 5992 flow [2024-06-14 14:01:37,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 415 transitions, 5578 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-14 14:01:37,533 INFO L231 Difference]: Finished difference. Result has 402 places, 393 transitions, 4771 flow [2024-06-14 14:01:37,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4682, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4771, PETRI_PLACES=402, PETRI_TRANSITIONS=393} [2024-06-14 14:01:37,534 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 360 predicate places. [2024-06-14 14:01:37,534 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 393 transitions, 4771 flow [2024-06-14 14:01:37,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:37,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:01:37,534 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:01:37,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2024-06-14 14:01:37,534 INFO L420 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:01:37,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:01:37,535 INFO L85 PathProgramCache]: Analyzing trace with hash 1235322048, now seen corresponding path program 17 times [2024-06-14 14:01:37,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:01:37,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577277404] [2024-06-14 14:01:37,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:01:37,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:01:37,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:37,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:01:37,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:37,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577277404] [2024-06-14 14:01:37,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577277404] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:37,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:37,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:01:37,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917293205] [2024-06-14 14:01:37,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:37,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:01:37,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:37,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:01:37,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:01:37,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:01:37,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 393 transitions, 4771 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:37,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:37,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:01:37,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:39,277 INFO L124 PetriNetUnfolderBase]: 4329/7400 cut-off events. [2024-06-14 14:01:39,277 INFO L125 PetriNetUnfolderBase]: For 1681767/1681769 co-relation queries the response was YES. [2024-06-14 14:01:39,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57133 conditions, 7400 events. 4329/7400 cut-off events. For 1681767/1681769 co-relation queries the response was YES. Maximal size of possible extension queue 521. Compared 53462 event pairs, 1557 based on Foata normal form. 8/7405 useless extension candidates. Maximal degree in co-relation 56951. Up to 6752 conditions per place. [2024-06-14 14:01:39,398 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 367 selfloop transitions, 42 changer transitions 0/415 dead transitions. [2024-06-14 14:01:39,399 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 415 transitions, 5667 flow [2024-06-14 14:01:39,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:01:39,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:01:39,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 208 transitions. [2024-06-14 14:01:39,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5073170731707317 [2024-06-14 14:01:39,400 INFO L175 Difference]: Start difference. First operand has 402 places, 393 transitions, 4771 flow. Second operand 10 states and 208 transitions. [2024-06-14 14:01:39,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 415 transitions, 5667 flow [2024-06-14 14:01:47,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 415 transitions, 5558 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-14 14:01:47,700 INFO L231 Difference]: Finished difference. Result has 404 places, 393 transitions, 4751 flow [2024-06-14 14:01:47,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4662, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4751, PETRI_PLACES=404, PETRI_TRANSITIONS=393} [2024-06-14 14:01:47,701 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 362 predicate places. [2024-06-14 14:01:47,701 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 393 transitions, 4751 flow [2024-06-14 14:01:47,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:47,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:01:47,701 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:01:47,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2024-06-14 14:01:47,702 INFO L420 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:01:47,702 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:01:47,702 INFO L85 PathProgramCache]: Analyzing trace with hash 1235173806, now seen corresponding path program 12 times [2024-06-14 14:01:47,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:01:47,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294930481] [2024-06-14 14:01:47,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:01:47,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:01:47,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:47,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:01:47,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:47,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294930481] [2024-06-14 14:01:47,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294930481] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:47,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:47,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:01:47,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72426051] [2024-06-14 14:01:47,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:47,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:01:47,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:47,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:01:47,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:01:47,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:01:47,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 393 transitions, 4751 flow. Second operand has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:47,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:47,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:01:47,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:49,394 INFO L124 PetriNetUnfolderBase]: 4270/7302 cut-off events. [2024-06-14 14:01:49,395 INFO L125 PetriNetUnfolderBase]: For 1636262/1636266 co-relation queries the response was YES. [2024-06-14 14:01:49,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52727 conditions, 7302 events. 4270/7302 cut-off events. For 1636262/1636266 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 52691 event pairs, 1422 based on Foata normal form. 32/7330 useless extension candidates. Maximal degree in co-relation 52544. Up to 5942 conditions per place. [2024-06-14 14:01:49,508 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 313 selfloop transitions, 103 changer transitions 7/429 dead transitions. [2024-06-14 14:01:49,508 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 429 transitions, 5737 flow [2024-06-14 14:01:49,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:01:49,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:01:49,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-14 14:01:49,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5975609756097561 [2024-06-14 14:01:49,509 INFO L175 Difference]: Start difference. First operand has 404 places, 393 transitions, 4751 flow. Second operand 8 states and 196 transitions. [2024-06-14 14:01:49,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 429 transitions, 5737 flow [2024-06-14 14:01:57,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 429 transitions, 5611 flow, removed 17 selfloop flow, removed 9 redundant places. [2024-06-14 14:01:57,692 INFO L231 Difference]: Finished difference. Result has 403 places, 391 transitions, 4806 flow [2024-06-14 14:01:57,692 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4625, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4806, PETRI_PLACES=403, PETRI_TRANSITIONS=391} [2024-06-14 14:01:57,693 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 361 predicate places. [2024-06-14 14:01:57,693 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 391 transitions, 4806 flow [2024-06-14 14:01:57,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:57,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:01:57,693 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:01:57,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2024-06-14 14:01:57,693 INFO L420 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:01:57,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:01:57,694 INFO L85 PathProgramCache]: Analyzing trace with hash -35053004, now seen corresponding path program 18 times [2024-06-14 14:01:57,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:01:57,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639176152] [2024-06-14 14:01:57,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:01:57,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:01:57,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:57,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:01:57,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:57,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639176152] [2024-06-14 14:01:57,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639176152] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:57,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:57,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:01:57,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952888218] [2024-06-14 14:01:57,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:57,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:01:57,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:57,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:01:57,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:01:57,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:01:57,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 391 transitions, 4806 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:57,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:57,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:01:57,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:59,371 INFO L124 PetriNetUnfolderBase]: 4250/7255 cut-off events. [2024-06-14 14:01:59,372 INFO L125 PetriNetUnfolderBase]: For 1446678/1446680 co-relation queries the response was YES. [2024-06-14 14:01:59,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52976 conditions, 7255 events. 4250/7255 cut-off events. For 1446678/1446680 co-relation queries the response was YES. Maximal size of possible extension queue 512. Compared 52032 event pairs, 1490 based on Foata normal form. 6/7258 useless extension candidates. Maximal degree in co-relation 52792. Up to 6583 conditions per place. [2024-06-14 14:01:59,484 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 368 selfloop transitions, 44 changer transitions 0/418 dead transitions. [2024-06-14 14:01:59,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 418 transitions, 5786 flow [2024-06-14 14:01:59,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:01:59,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:01:59,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 226 transitions. [2024-06-14 14:01:59,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5011086474501109 [2024-06-14 14:01:59,486 INFO L175 Difference]: Start difference. First operand has 403 places, 391 transitions, 4806 flow. Second operand 11 states and 226 transitions. [2024-06-14 14:01:59,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 418 transitions, 5786 flow [2024-06-14 14:02:09,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 418 transitions, 5537 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-14 14:02:09,855 INFO L231 Difference]: Finished difference. Result has 405 places, 392 transitions, 4713 flow [2024-06-14 14:02:09,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4557, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4713, PETRI_PLACES=405, PETRI_TRANSITIONS=392} [2024-06-14 14:02:09,856 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 363 predicate places. [2024-06-14 14:02:09,856 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 392 transitions, 4713 flow [2024-06-14 14:02:09,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:09,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:02:09,856 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:02:09,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2024-06-14 14:02:09,857 INFO L420 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:02:09,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:02:09,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1501287168, now seen corresponding path program 19 times [2024-06-14 14:02:09,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:02:09,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494847974] [2024-06-14 14:02:09,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:02:09,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:02:09,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:02:10,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:02:10,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:02:10,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494847974] [2024-06-14 14:02:10,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494847974] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:02:10,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:02:10,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:02:10,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42768747] [2024-06-14 14:02:10,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:02:10,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:02:10,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:02:10,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:02:10,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:02:10,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:02:10,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 392 transitions, 4713 flow. Second operand has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:10,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:02:10,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:02:10,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:02:11,574 INFO L124 PetriNetUnfolderBase]: 4336/7365 cut-off events. [2024-06-14 14:02:11,574 INFO L125 PetriNetUnfolderBase]: For 1572358/1572360 co-relation queries the response was YES. [2024-06-14 14:02:11,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56122 conditions, 7365 events. 4336/7365 cut-off events. For 1572358/1572360 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 52713 event pairs, 1423 based on Foata normal form. 6/7368 useless extension candidates. Maximal degree in co-relation 55938. Up to 6109 conditions per place. [2024-06-14 14:02:11,694 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 363 selfloop transitions, 55 changer transitions 4/428 dead transitions. [2024-06-14 14:02:11,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 428 transitions, 6417 flow [2024-06-14 14:02:11,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:02:11,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:02:11,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 203 transitions. [2024-06-14 14:02:11,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5501355013550135 [2024-06-14 14:02:11,695 INFO L175 Difference]: Start difference. First operand has 405 places, 392 transitions, 4713 flow. Second operand 9 states and 203 transitions. [2024-06-14 14:02:11,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 428 transitions, 6417 flow [2024-06-14 14:02:20,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 428 transitions, 6277 flow, removed 27 selfloop flow, removed 9 redundant places. [2024-06-14 14:02:20,644 INFO L231 Difference]: Finished difference. Result has 405 places, 395 transitions, 4881 flow [2024-06-14 14:02:20,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4573, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4881, PETRI_PLACES=405, PETRI_TRANSITIONS=395} [2024-06-14 14:02:20,656 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 363 predicate places. [2024-06-14 14:02:20,656 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 395 transitions, 4881 flow [2024-06-14 14:02:20,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:20,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:02:20,657 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:02:20,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2024-06-14 14:02:20,657 INFO L420 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:02:20,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:02:20,657 INFO L85 PathProgramCache]: Analyzing trace with hash 1500871458, now seen corresponding path program 20 times [2024-06-14 14:02:20,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:02:20,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411942272] [2024-06-14 14:02:20,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:02:20,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:02:20,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:02:20,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:02:20,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:02:20,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411942272] [2024-06-14 14:02:20,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411942272] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:02:20,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:02:20,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:02:20,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744379834] [2024-06-14 14:02:20,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:02:20,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:02:20,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:02:20,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:02:20,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:02:21,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:02:21,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 395 transitions, 4881 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:21,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:02:21,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:02:21,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:02:22,803 INFO L124 PetriNetUnfolderBase]: 4323/7352 cut-off events. [2024-06-14 14:02:22,803 INFO L125 PetriNetUnfolderBase]: For 1536744/1536746 co-relation queries the response was YES. [2024-06-14 14:02:22,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55109 conditions, 7352 events. 4323/7352 cut-off events. For 1536744/1536746 co-relation queries the response was YES. Maximal size of possible extension queue 530. Compared 52713 event pairs, 1465 based on Foata normal form. 6/7347 useless extension candidates. Maximal degree in co-relation 54924. Up to 6580 conditions per place. [2024-06-14 14:02:22,914 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 369 selfloop transitions, 49 changer transitions 2/426 dead transitions. [2024-06-14 14:02:22,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 426 transitions, 5853 flow [2024-06-14 14:02:22,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:02:22,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:02:22,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 217 transitions. [2024-06-14 14:02:22,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5292682926829269 [2024-06-14 14:02:22,915 INFO L175 Difference]: Start difference. First operand has 405 places, 395 transitions, 4881 flow. Second operand 10 states and 217 transitions. [2024-06-14 14:02:22,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 426 transitions, 5853 flow [2024-06-14 14:02:32,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 426 transitions, 5696 flow, removed 55 selfloop flow, removed 4 redundant places. [2024-06-14 14:02:32,256 INFO L231 Difference]: Finished difference. Result has 411 places, 395 transitions, 4826 flow [2024-06-14 14:02:32,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4724, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4826, PETRI_PLACES=411, PETRI_TRANSITIONS=395} [2024-06-14 14:02:32,256 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 369 predicate places. [2024-06-14 14:02:32,256 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 395 transitions, 4826 flow [2024-06-14 14:02:32,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:32,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:02:32,257 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, 1] [2024-06-14 14:02:32,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175 [2024-06-14 14:02:32,257 INFO L420 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:02:32,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:02:32,257 INFO L85 PathProgramCache]: Analyzing trace with hash 1500871086, now seen corresponding path program 13 times [2024-06-14 14:02:32,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:02:32,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068969328] [2024-06-14 14:02:32,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:02:32,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:02:32,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:02:32,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:02:32,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:02:32,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068969328] [2024-06-14 14:02:32,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068969328] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:02:32,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:02:32,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:02:32,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403290172] [2024-06-14 14:02:32,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:02:32,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:02:32,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:02:32,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:02:32,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:02:32,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:02:32,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 395 transitions, 4826 flow. Second operand has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:32,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:02:32,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:02:32,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:02:34,249 INFO L124 PetriNetUnfolderBase]: 4264/7298 cut-off events. [2024-06-14 14:02:34,250 INFO L125 PetriNetUnfolderBase]: For 1490984/1490988 co-relation queries the response was YES. [2024-06-14 14:02:34,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50394 conditions, 7298 events. 4264/7298 cut-off events. For 1490984/1490988 co-relation queries the response was YES. Maximal size of possible extension queue 524. Compared 52559 event pairs, 1095 based on Foata normal form. 32/7324 useless extension candidates. Maximal degree in co-relation 50207. Up to 4579 conditions per place. [2024-06-14 14:02:34,349 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 306 selfloop transitions, 113 changer transitions 11/436 dead transitions. [2024-06-14 14:02:34,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 436 transitions, 6128 flow [2024-06-14 14:02:34,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:02:34,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:02:34,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-14 14:02:34,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-14 14:02:34,350 INFO L175 Difference]: Start difference. First operand has 411 places, 395 transitions, 4826 flow. Second operand 8 states and 200 transitions. [2024-06-14 14:02:34,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 436 transitions, 6128 flow [2024-06-14 14:02:42,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 436 transitions, 5988 flow, removed 18 selfloop flow, removed 9 redundant places. [2024-06-14 14:02:42,398 INFO L231 Difference]: Finished difference. Result has 410 places, 390 transitions, 4833 flow [2024-06-14 14:02:42,398 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4686, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4833, PETRI_PLACES=410, PETRI_TRANSITIONS=390} [2024-06-14 14:02:42,398 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 368 predicate places. [2024-06-14 14:02:42,398 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 390 transitions, 4833 flow [2024-06-14 14:02:42,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:42,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:02:42,399 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:02:42,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176 [2024-06-14 14:02:42,399 INFO L420 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:02:42,399 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:02:42,399 INFO L85 PathProgramCache]: Analyzing trace with hash 995186112, now seen corresponding path program 1 times [2024-06-14 14:02:42,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:02:42,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092835955] [2024-06-14 14:02:42,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:02:42,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:02:42,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:02:42,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:02:42,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:02:42,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092835955] [2024-06-14 14:02:42,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092835955] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:02:42,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:02:42,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:02:42,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139505293] [2024-06-14 14:02:42,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:02:42,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:02:42,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:02:42,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:02:42,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:02:42,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:02:42,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 390 transitions, 4833 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:42,738 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:02:42,738 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:02:42,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:02:44,247 INFO L124 PetriNetUnfolderBase]: 3923/6712 cut-off events. [2024-06-14 14:02:44,247 INFO L125 PetriNetUnfolderBase]: For 1287179/1287181 co-relation queries the response was YES. [2024-06-14 14:02:44,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48020 conditions, 6712 events. 3923/6712 cut-off events. For 1287179/1287181 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 47642 event pairs, 1318 based on Foata normal form. 6/6715 useless extension candidates. Maximal degree in co-relation 47832. Up to 6078 conditions per place. [2024-06-14 14:02:44,345 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 369 selfloop transitions, 42 changer transitions 0/417 dead transitions. [2024-06-14 14:02:44,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 417 transitions, 5815 flow [2024-06-14 14:02:44,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:02:44,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:02:44,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 226 transitions. [2024-06-14 14:02:44,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5011086474501109 [2024-06-14 14:02:44,346 INFO L175 Difference]: Start difference. First operand has 410 places, 390 transitions, 4833 flow. Second operand 11 states and 226 transitions. [2024-06-14 14:02:44,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 417 transitions, 5815 flow [2024-06-14 14:02:53,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 417 transitions, 5454 flow, removed 14 selfloop flow, removed 10 redundant places. [2024-06-14 14:02:53,335 INFO L231 Difference]: Finished difference. Result has 411 places, 391 transitions, 4624 flow [2024-06-14 14:02:53,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4472, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4624, PETRI_PLACES=411, PETRI_TRANSITIONS=391} [2024-06-14 14:02:53,336 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 369 predicate places. [2024-06-14 14:02:53,336 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 391 transitions, 4624 flow [2024-06-14 14:02:53,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:53,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:02:53,336 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:02:53,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177 [2024-06-14 14:02:53,336 INFO L420 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:02:53,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:02:53,337 INFO L85 PathProgramCache]: Analyzing trace with hash 144940604, now seen corresponding path program 2 times [2024-06-14 14:02:53,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:02:53,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859455920] [2024-06-14 14:02:53,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:02:53,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:02:53,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:02:53,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:02:53,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:02:53,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859455920] [2024-06-14 14:02:53,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859455920] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:02:53,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:02:53,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:02:53,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629785661] [2024-06-14 14:02:53,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:02:53,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:02:53,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:02:53,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:02:53,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:02:53,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:02:53,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 391 transitions, 4624 flow. Second operand has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:53,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:02:53,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:02:53,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:02:55,123 INFO L124 PetriNetUnfolderBase]: 3816/6523 cut-off events. [2024-06-14 14:02:55,123 INFO L125 PetriNetUnfolderBase]: For 1044888/1044890 co-relation queries the response was YES. [2024-06-14 14:02:55,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43606 conditions, 6523 events. 3816/6523 cut-off events. For 1044888/1044890 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 45980 event pairs, 1160 based on Foata normal form. 6/6526 useless extension candidates. Maximal degree in co-relation 43418. Up to 5346 conditions per place. [2024-06-14 14:02:55,216 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 359 selfloop transitions, 55 changer transitions 4/424 dead transitions. [2024-06-14 14:02:55,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 424 transitions, 5936 flow [2024-06-14 14:02:55,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:02:55,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:02:55,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 202 transitions. [2024-06-14 14:02:55,217 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5474254742547425 [2024-06-14 14:02:55,218 INFO L175 Difference]: Start difference. First operand has 411 places, 391 transitions, 4624 flow. Second operand 9 states and 202 transitions. [2024-06-14 14:02:55,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 424 transitions, 5936 flow [2024-06-14 14:03:01,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 424 transitions, 5800 flow, removed 27 selfloop flow, removed 9 redundant places. [2024-06-14 14:03:01,260 INFO L231 Difference]: Finished difference. Result has 411 places, 392 transitions, 4666 flow [2024-06-14 14:03:01,261 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4488, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4666, PETRI_PLACES=411, PETRI_TRANSITIONS=392} [2024-06-14 14:03:01,261 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 369 predicate places. [2024-06-14 14:03:01,261 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 392 transitions, 4666 flow [2024-06-14 14:03:01,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:01,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:03:01,261 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:03:01,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178 [2024-06-14 14:03:01,262 INFO L420 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:03:01,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:03:01,262 INFO L85 PathProgramCache]: Analyzing trace with hash 144703454, now seen corresponding path program 3 times [2024-06-14 14:03:01,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:03:01,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973008261] [2024-06-14 14:03:01,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:03:01,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:03:01,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:03:01,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:03:01,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:03:01,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973008261] [2024-06-14 14:03:01,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973008261] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:03:01,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:03:01,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:03:01,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107131993] [2024-06-14 14:03:01,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:03:01,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:03:01,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:03:01,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:03:01,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:03:01,536 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:03:01,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 392 transitions, 4666 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:01,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:03:01,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:03:01,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:03:03,109 INFO L124 PetriNetUnfolderBase]: 3803/6502 cut-off events. [2024-06-14 14:03:03,110 INFO L125 PetriNetUnfolderBase]: For 998021/998023 co-relation queries the response was YES. [2024-06-14 14:03:03,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42483 conditions, 6502 events. 3803/6502 cut-off events. For 998021/998023 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 45854 event pairs, 1218 based on Foata normal form. 6/6505 useless extension candidates. Maximal degree in co-relation 42294. Up to 5844 conditions per place. [2024-06-14 14:03:03,200 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 366 selfloop transitions, 46 changer transitions 2/420 dead transitions. [2024-06-14 14:03:03,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 420 transitions, 5604 flow [2024-06-14 14:03:03,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:03:03,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:03:03,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 214 transitions. [2024-06-14 14:03:03,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5219512195121951 [2024-06-14 14:03:03,201 INFO L175 Difference]: Start difference. First operand has 411 places, 392 transitions, 4666 flow. Second operand 10 states and 214 transitions. [2024-06-14 14:03:03,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 420 transitions, 5604 flow [2024-06-14 14:03:08,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 420 transitions, 5369 flow, removed 54 selfloop flow, removed 7 redundant places. [2024-06-14 14:03:08,105 INFO L231 Difference]: Finished difference. Result has 414 places, 392 transitions, 4527 flow [2024-06-14 14:03:08,106 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4431, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4527, PETRI_PLACES=414, PETRI_TRANSITIONS=392} [2024-06-14 14:03:08,106 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 372 predicate places. [2024-06-14 14:03:08,106 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 392 transitions, 4527 flow [2024-06-14 14:03:08,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:08,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:03:08,107 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:03:08,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179 [2024-06-14 14:03:08,107 INFO L420 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:03:08,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:03:08,107 INFO L85 PathProgramCache]: Analyzing trace with hash -789476736, now seen corresponding path program 21 times [2024-06-14 14:03:08,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:03:08,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813672608] [2024-06-14 14:03:08,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:03:08,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:03:08,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:03:08,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:03:08,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:03:08,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813672608] [2024-06-14 14:03:08,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813672608] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:03:08,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:03:08,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:03:08,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084193503] [2024-06-14 14:03:08,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:03:08,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:03:08,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:03:08,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:03:08,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:03:08,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:03:08,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 392 transitions, 4527 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:08,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:03:08,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:03:08,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:03:09,834 INFO L124 PetriNetUnfolderBase]: 3780/6496 cut-off events. [2024-06-14 14:03:09,834 INFO L125 PetriNetUnfolderBase]: For 1022940/1022944 co-relation queries the response was YES. [2024-06-14 14:03:09,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38405 conditions, 6496 events. 3780/6496 cut-off events. For 1022940/1022944 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 46144 event pairs, 1228 based on Foata normal form. 36/6530 useless extension candidates. Maximal degree in co-relation 38215. Up to 5592 conditions per place. [2024-06-14 14:03:09,922 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 314 selfloop transitions, 93 changer transitions 3/416 dead transitions. [2024-06-14 14:03:09,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 423 places, 416 transitions, 5465 flow [2024-06-14 14:03:09,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:03:09,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:03:09,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 215 transitions. [2024-06-14 14:03:09,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.524390243902439 [2024-06-14 14:03:09,924 INFO L175 Difference]: Start difference. First operand has 414 places, 392 transitions, 4527 flow. Second operand 10 states and 215 transitions. [2024-06-14 14:03:09,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 423 places, 416 transitions, 5465 flow [2024-06-14 14:03:15,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 416 transitions, 5371 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-14 14:03:15,529 INFO L231 Difference]: Finished difference. Result has 416 places, 392 transitions, 4655 flow [2024-06-14 14:03:15,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4433, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4655, PETRI_PLACES=416, PETRI_TRANSITIONS=392} [2024-06-14 14:03:15,530 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 374 predicate places. [2024-06-14 14:03:15,530 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 392 transitions, 4655 flow [2024-06-14 14:03:15,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:15,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:03:15,531 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:03:15,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180 [2024-06-14 14:03:15,531 INFO L420 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:03:15,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:03:15,531 INFO L85 PathProgramCache]: Analyzing trace with hash -623837602, now seen corresponding path program 22 times [2024-06-14 14:03:15,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:03:15,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772799594] [2024-06-14 14:03:15,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:03:15,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:03:15,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:03:15,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:03:15,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:03:15,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772799594] [2024-06-14 14:03:15,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772799594] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:03:15,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:03:15,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:03:15,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700776628] [2024-06-14 14:03:15,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:03:15,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:03:15,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:03:15,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:03:15,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:03:15,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:03:15,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 392 transitions, 4655 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:15,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:03:15,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:03:15,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:03:17,113 INFO L124 PetriNetUnfolderBase]: 3798/6526 cut-off events. [2024-06-14 14:03:17,113 INFO L125 PetriNetUnfolderBase]: For 784389/784393 co-relation queries the response was YES. [2024-06-14 14:03:17,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38932 conditions, 6526 events. 3798/6526 cut-off events. For 784389/784393 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 46425 event pairs, 1232 based on Foata normal form. 10/6534 useless extension candidates. Maximal degree in co-relation 38741. Up to 5756 conditions per place. [2024-06-14 14:03:17,389 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 314 selfloop transitions, 93 changer transitions 0/413 dead transitions. [2024-06-14 14:03:17,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 413 transitions, 5575 flow [2024-06-14 14:03:17,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:03:17,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:03:17,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 195 transitions. [2024-06-14 14:03:17,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5284552845528455 [2024-06-14 14:03:17,390 INFO L175 Difference]: Start difference. First operand has 416 places, 392 transitions, 4655 flow. Second operand 9 states and 195 transitions. [2024-06-14 14:03:17,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 413 transitions, 5575 flow [2024-06-14 14:03:24,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 413 transitions, 5364 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-14 14:03:24,507 INFO L231 Difference]: Finished difference. Result has 417 places, 393 transitions, 4677 flow [2024-06-14 14:03:24,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4444, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4677, PETRI_PLACES=417, PETRI_TRANSITIONS=393} [2024-06-14 14:03:24,507 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 375 predicate places. [2024-06-14 14:03:24,507 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 393 transitions, 4677 flow [2024-06-14 14:03:24,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:24,507 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:03:24,508 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:03:24,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181 [2024-06-14 14:03:24,508 INFO L420 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:03:24,508 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:03:24,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1424642530, now seen corresponding path program 23 times [2024-06-14 14:03:24,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:03:24,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993082872] [2024-06-14 14:03:24,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:03:24,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:03:24,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:03:24,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:03:24,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:03:24,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993082872] [2024-06-14 14:03:24,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993082872] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:03:24,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:03:24,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:03:24,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143313780] [2024-06-14 14:03:24,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:03:24,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:03:24,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:03:24,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:03:24,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:03:24,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:03:24,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 393 transitions, 4677 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:24,738 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:03:24,738 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:03:24,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:03:26,125 INFO L124 PetriNetUnfolderBase]: 3780/6495 cut-off events. [2024-06-14 14:03:26,125 INFO L125 PetriNetUnfolderBase]: For 712606/712608 co-relation queries the response was YES. [2024-06-14 14:03:26,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37460 conditions, 6495 events. 3780/6495 cut-off events. For 712606/712608 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 46163 event pairs, 1207 based on Foata normal form. 8/6500 useless extension candidates. Maximal degree in co-relation 37268. Up to 5698 conditions per place. [2024-06-14 14:03:26,219 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 306 selfloop transitions, 108 changer transitions 0/420 dead transitions. [2024-06-14 14:03:26,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 426 places, 420 transitions, 5589 flow [2024-06-14 14:03:26,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:03:26,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:03:26,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 223 transitions. [2024-06-14 14:03:26,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5439024390243903 [2024-06-14 14:03:26,220 INFO L175 Difference]: Start difference. First operand has 417 places, 393 transitions, 4677 flow. Second operand 10 states and 223 transitions. [2024-06-14 14:03:26,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 426 places, 420 transitions, 5589 flow [2024-06-14 14:03:30,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 419 places, 420 transitions, 5360 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-14 14:03:30,681 INFO L231 Difference]: Finished difference. Result has 420 places, 393 transitions, 4672 flow [2024-06-14 14:03:30,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4448, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4672, PETRI_PLACES=420, PETRI_TRANSITIONS=393} [2024-06-14 14:03:30,682 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 378 predicate places. [2024-06-14 14:03:30,682 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 393 transitions, 4672 flow [2024-06-14 14:03:30,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:30,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:03:30,682 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:03:30,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182 [2024-06-14 14:03:30,683 INFO L420 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:03:30,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:03:30,683 INFO L85 PathProgramCache]: Analyzing trace with hash 2096801362, now seen corresponding path program 24 times [2024-06-14 14:03:30,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:03:30,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086492149] [2024-06-14 14:03:30,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:03:30,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:03:30,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:03:30,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:03:30,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:03:30,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086492149] [2024-06-14 14:03:30,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086492149] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:03:30,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:03:30,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:03:30,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119650705] [2024-06-14 14:03:30,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:03:30,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:03:30,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:03:30,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:03:30,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:03:30,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:03:30,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 393 transitions, 4672 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:30,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:03:30,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:03:30,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:03:32,337 INFO L124 PetriNetUnfolderBase]: 3800/6520 cut-off events. [2024-06-14 14:03:32,338 INFO L125 PetriNetUnfolderBase]: For 701911/701913 co-relation queries the response was YES. [2024-06-14 14:03:32,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37706 conditions, 6520 events. 3800/6520 cut-off events. For 701911/701913 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 46256 event pairs, 1200 based on Foata normal form. 6/6523 useless extension candidates. Maximal degree in co-relation 37513. Up to 5634 conditions per place. [2024-06-14 14:03:32,432 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 307 selfloop transitions, 119 changer transitions 0/432 dead transitions. [2024-06-14 14:03:32,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 432 transitions, 5992 flow [2024-06-14 14:03:32,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:03:32,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:03:32,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 249 transitions. [2024-06-14 14:03:32,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5521064301552107 [2024-06-14 14:03:32,433 INFO L175 Difference]: Start difference. First operand has 420 places, 393 transitions, 4672 flow. Second operand 11 states and 249 transitions. [2024-06-14 14:03:32,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 432 transitions, 5992 flow [2024-06-14 14:03:37,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 432 transitions, 5536 flow, removed 9 selfloop flow, removed 12 redundant places. [2024-06-14 14:03:37,327 INFO L231 Difference]: Finished difference. Result has 419 places, 394 transitions, 4530 flow [2024-06-14 14:03:37,328 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4218, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4530, PETRI_PLACES=419, PETRI_TRANSITIONS=394} [2024-06-14 14:03:37,328 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 377 predicate places. [2024-06-14 14:03:37,328 INFO L495 AbstractCegarLoop]: Abstraction has has 419 places, 394 transitions, 4530 flow [2024-06-14 14:03:37,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:37,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:03:37,328 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:03:37,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183 [2024-06-14 14:03:37,329 INFO L420 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:03:37,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:03:37,329 INFO L85 PathProgramCache]: Analyzing trace with hash 1840448722, now seen corresponding path program 25 times [2024-06-14 14:03:37,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:03:37,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49010789] [2024-06-14 14:03:37,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:03:37,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:03:37,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:03:37,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:03:37,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:03:37,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49010789] [2024-06-14 14:03:37,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49010789] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:03:37,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:03:37,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:03:37,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937476566] [2024-06-14 14:03:37,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:03:37,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:03:37,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:03:37,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:03:37,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:03:37,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:03:37,559 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 419 places, 394 transitions, 4530 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:37,559 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:03:37,559 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:03:37,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:03:39,016 INFO L124 PetriNetUnfolderBase]: 3782/6501 cut-off events. [2024-06-14 14:03:39,016 INFO L125 PetriNetUnfolderBase]: For 641674/641676 co-relation queries the response was YES. [2024-06-14 14:03:39,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35728 conditions, 6501 events. 3782/6501 cut-off events. For 641674/641676 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 46202 event pairs, 1205 based on Foata normal form. 8/6506 useless extension candidates. Maximal degree in co-relation 35537. Up to 5704 conditions per place. [2024-06-14 14:03:39,108 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 307 selfloop transitions, 111 changer transitions 0/424 dead transitions. [2024-06-14 14:03:39,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 424 transitions, 5458 flow [2024-06-14 14:03:39,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:03:39,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:03:39,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 225 transitions. [2024-06-14 14:03:39,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487804878048781 [2024-06-14 14:03:39,109 INFO L175 Difference]: Start difference. First operand has 419 places, 394 transitions, 4530 flow. Second operand 10 states and 225 transitions. [2024-06-14 14:03:39,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 424 transitions, 5458 flow [2024-06-14 14:03:44,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 424 transitions, 5157 flow, removed 41 selfloop flow, removed 8 redundant places. [2024-06-14 14:03:44,111 INFO L231 Difference]: Finished difference. Result has 421 places, 394 transitions, 4459 flow [2024-06-14 14:03:44,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4229, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=394, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4459, PETRI_PLACES=421, PETRI_TRANSITIONS=394} [2024-06-14 14:03:44,111 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 379 predicate places. [2024-06-14 14:03:44,112 INFO L495 AbstractCegarLoop]: Abstraction has has 421 places, 394 transitions, 4459 flow [2024-06-14 14:03:44,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:44,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:03:44,112 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:03:44,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184 [2024-06-14 14:03:44,112 INFO L420 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:03:44,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:03:44,113 INFO L85 PathProgramCache]: Analyzing trace with hash 505975988, now seen corresponding path program 26 times [2024-06-14 14:03:44,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:03:44,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036223156] [2024-06-14 14:03:44,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:03:44,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:03:44,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:03:44,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:03:44,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:03:44,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036223156] [2024-06-14 14:03:44,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036223156] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:03:44,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:03:44,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:03:44,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962393292] [2024-06-14 14:03:44,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:03:44,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:03:44,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:03:44,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:03:44,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:03:44,380 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:03:44,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 421 places, 394 transitions, 4459 flow. Second operand has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:44,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:03:44,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:03:44,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:03:45,916 INFO L124 PetriNetUnfolderBase]: 3969/6810 cut-off events. [2024-06-14 14:03:45,917 INFO L125 PetriNetUnfolderBase]: For 971908/971910 co-relation queries the response was YES. [2024-06-14 14:03:45,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42314 conditions, 6810 events. 3969/6810 cut-off events. For 971908/971910 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 48681 event pairs, 978 based on Foata normal form. 6/6813 useless extension candidates. Maximal degree in co-relation 42122. Up to 4405 conditions per place. [2024-06-14 14:03:46,014 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 276 selfloop transitions, 154 changer transitions 2/438 dead transitions. [2024-06-14 14:03:46,014 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 438 transitions, 6235 flow [2024-06-14 14:03:46,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:03:46,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:03:46,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 221 transitions. [2024-06-14 14:03:46,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5989159891598916 [2024-06-14 14:03:46,015 INFO L175 Difference]: Start difference. First operand has 421 places, 394 transitions, 4459 flow. Second operand 9 states and 221 transitions. [2024-06-14 14:03:46,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 438 transitions, 6235 flow [2024-06-14 14:03:53,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 438 transitions, 5969 flow, removed 4 selfloop flow, removed 12 redundant places. [2024-06-14 14:03:53,843 INFO L231 Difference]: Finished difference. Result has 418 places, 397 transitions, 4711 flow [2024-06-14 14:03:53,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4197, PETRI_DIFFERENCE_MINUEND_PLACES=409, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=394, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4711, PETRI_PLACES=418, PETRI_TRANSITIONS=397} [2024-06-14 14:03:53,844 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 376 predicate places. [2024-06-14 14:03:53,844 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 397 transitions, 4711 flow [2024-06-14 14:03:53,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:53,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:03:53,844 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:03:53,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185 [2024-06-14 14:03:53,844 INFO L420 AbstractCegarLoop]: === Iteration 187 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:03:53,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:03:53,845 INFO L85 PathProgramCache]: Analyzing trace with hash 247272308, now seen corresponding path program 27 times [2024-06-14 14:03:53,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:03:53,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981664497] [2024-06-14 14:03:53,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:03:53,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:03:53,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:03:54,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:03:54,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:03:54,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981664497] [2024-06-14 14:03:54,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981664497] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:03:54,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:03:54,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:03:54,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115986865] [2024-06-14 14:03:54,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:03:54,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:03:54,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:03:54,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:03:54,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:03:54,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:03:54,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 397 transitions, 4711 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:54,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:03:54,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:03:54,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:03:55,733 INFO L124 PetriNetUnfolderBase]: 3956/6803 cut-off events. [2024-06-14 14:03:55,733 INFO L125 PetriNetUnfolderBase]: For 913315/913317 co-relation queries the response was YES. [2024-06-14 14:03:55,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41623 conditions, 6803 events. 3956/6803 cut-off events. For 913315/913317 co-relation queries the response was YES. Maximal size of possible extension queue 507. Compared 48710 event pairs, 1025 based on Foata normal form. 6/6802 useless extension candidates. Maximal degree in co-relation 41432. Up to 5539 conditions per place. [2024-06-14 14:03:55,832 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 292 selfloop transitions, 136 changer transitions 2/436 dead transitions. [2024-06-14 14:03:55,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 436 transitions, 5699 flow [2024-06-14 14:03:55,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:03:55,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:03:55,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 236 transitions. [2024-06-14 14:03:55,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5756097560975609 [2024-06-14 14:03:55,833 INFO L175 Difference]: Start difference. First operand has 418 places, 397 transitions, 4711 flow. Second operand 10 states and 236 transitions. [2024-06-14 14:03:55,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 436 transitions, 5699 flow [2024-06-14 14:04:03,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 436 transitions, 5445 flow, removed 59 selfloop flow, removed 5 redundant places. [2024-06-14 14:04:03,921 INFO L231 Difference]: Finished difference. Result has 423 places, 397 transitions, 4735 flow [2024-06-14 14:04:03,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4457, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4735, PETRI_PLACES=423, PETRI_TRANSITIONS=397} [2024-06-14 14:04:03,921 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 381 predicate places. [2024-06-14 14:04:03,922 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 397 transitions, 4735 flow [2024-06-14 14:04:03,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:03,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:03,922 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:04:03,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186 [2024-06-14 14:04:03,922 INFO L420 AbstractCegarLoop]: === Iteration 188 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:04:03,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:03,922 INFO L85 PathProgramCache]: Analyzing trace with hash 47016448, now seen corresponding path program 4 times [2024-06-14 14:04:03,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:03,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319479640] [2024-06-14 14:04:03,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:03,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:03,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:04,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:04,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:04,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319479640] [2024-06-14 14:04:04,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319479640] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:04,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:04,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:04:04,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573281034] [2024-06-14 14:04:04,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:04,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:04:04,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:04,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:04:04,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:04:04,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:04:04,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 397 transitions, 4735 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:04,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:04,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:04:04,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:05,525 INFO L124 PetriNetUnfolderBase]: 3930/6778 cut-off events. [2024-06-14 14:04:05,525 INFO L125 PetriNetUnfolderBase]: For 906800/906804 co-relation queries the response was YES. [2024-06-14 14:04:05,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38177 conditions, 6778 events. 3930/6778 cut-off events. For 906800/906804 co-relation queries the response was YES. Maximal size of possible extension queue 511. Compared 48731 event pairs, 1252 based on Foata normal form. 32/6808 useless extension candidates. Maximal degree in co-relation 37985. Up to 5666 conditions per place. [2024-06-14 14:04:05,621 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 321 selfloop transitions, 94 changer transitions 7/428 dead transitions. [2024-06-14 14:04:05,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 428 transitions, 5765 flow [2024-06-14 14:04:05,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:04:05,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:04:05,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 236 transitions. [2024-06-14 14:04:05,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5232815964523282 [2024-06-14 14:04:05,623 INFO L175 Difference]: Start difference. First operand has 423 places, 397 transitions, 4735 flow. Second operand 11 states and 236 transitions. [2024-06-14 14:04:05,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 428 transitions, 5765 flow [2024-06-14 14:04:11,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 428 transitions, 5471 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-14 14:04:11,728 INFO L231 Difference]: Finished difference. Result has 424 places, 396 transitions, 4680 flow [2024-06-14 14:04:11,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4441, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4680, PETRI_PLACES=424, PETRI_TRANSITIONS=396} [2024-06-14 14:04:11,728 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 382 predicate places. [2024-06-14 14:04:11,728 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 396 transitions, 4680 flow [2024-06-14 14:04:11,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:11,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:11,729 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:04:11,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187 [2024-06-14 14:04:11,729 INFO L420 AbstractCegarLoop]: === Iteration 189 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:04:11,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:11,729 INFO L85 PathProgramCache]: Analyzing trace with hash -523564254, now seen corresponding path program 5 times [2024-06-14 14:04:11,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:11,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638782073] [2024-06-14 14:04:11,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:11,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:11,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:11,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:11,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:11,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638782073] [2024-06-14 14:04:11,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638782073] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:11,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:11,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:04:11,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95734167] [2024-06-14 14:04:11,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:11,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:04:11,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:11,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:04:11,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:04:11,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:04:11,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 396 transitions, 4680 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:11,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:11,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:04:11,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:13,613 INFO L124 PetriNetUnfolderBase]: 4004/6910 cut-off events. [2024-06-14 14:04:13,614 INFO L125 PetriNetUnfolderBase]: For 1240281/1240285 co-relation queries the response was YES. [2024-06-14 14:04:13,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43649 conditions, 6910 events. 4004/6910 cut-off events. For 1240281/1240285 co-relation queries the response was YES. Maximal size of possible extension queue 517. Compared 49732 event pairs, 1300 based on Foata normal form. 32/6940 useless extension candidates. Maximal degree in co-relation 43457. Up to 5174 conditions per place. [2024-06-14 14:04:13,717 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 325 selfloop transitions, 91 changer transitions 10/432 dead transitions. [2024-06-14 14:04:13,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 432 transitions, 6090 flow [2024-06-14 14:04:13,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:04:13,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:04:13,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 223 transitions. [2024-06-14 14:04:13,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5439024390243903 [2024-06-14 14:04:13,718 INFO L175 Difference]: Start difference. First operand has 424 places, 396 transitions, 4680 flow. Second operand 10 states and 223 transitions. [2024-06-14 14:04:13,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 432 transitions, 6090 flow [2024-06-14 14:04:20,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 432 transitions, 5838 flow, removed 33 selfloop flow, removed 9 redundant places. [2024-06-14 14:04:20,194 INFO L231 Difference]: Finished difference. Result has 425 places, 393 transitions, 4650 flow [2024-06-14 14:04:20,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4428, PETRI_DIFFERENCE_MINUEND_PLACES=415, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4650, PETRI_PLACES=425, PETRI_TRANSITIONS=393} [2024-06-14 14:04:20,195 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 383 predicate places. [2024-06-14 14:04:20,195 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 393 transitions, 4650 flow [2024-06-14 14:04:20,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:20,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:20,195 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, 1] [2024-06-14 14:04:20,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188 [2024-06-14 14:04:20,195 INFO L420 AbstractCegarLoop]: === Iteration 190 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:04:20,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:20,196 INFO L85 PathProgramCache]: Analyzing trace with hash 468678162, now seen corresponding path program 6 times [2024-06-14 14:04:20,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:20,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606332904] [2024-06-14 14:04:20,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:20,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:20,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:20,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:20,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:20,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606332904] [2024-06-14 14:04:20,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606332904] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:20,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:20,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:04:20,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390945622] [2024-06-14 14:04:20,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:20,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:04:20,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:20,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:04:20,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:04:20,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:04:20,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 393 transitions, 4650 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:20,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:20,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:04:20,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand