./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix001.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/mix001.opt.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/mix001.opt.i ./goblint.2024-05-21_14-57-05.files/protection/mix001.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-cde23df-m [2024-06-14 11:46:26,322 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-14 11:46:26,400 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-14 11:46:26,410 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-14 11:46:26,413 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-14 11:46:26,433 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-14 11:46:26,433 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-14 11:46:26,434 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-14 11:46:26,434 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-14 11:46:26,437 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-14 11:46:26,438 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-14 11:46:26,438 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-14 11:46:26,438 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-14 11:46:26,440 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-14 11:46:26,440 INFO L153 SettingsManager]: * Use SBE=true [2024-06-14 11:46:26,440 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-14 11:46:26,440 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-14 11:46:26,440 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-14 11:46:26,441 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-14 11:46:26,441 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-14 11:46:26,441 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-14 11:46:26,441 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-14 11:46:26,442 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-14 11:46:26,442 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-14 11:46:26,442 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-14 11:46:26,442 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-14 11:46:26,442 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-14 11:46:26,443 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-14 11:46:26,443 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-14 11:46:26,443 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-14 11:46:26,444 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-14 11:46:26,444 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-14 11:46:26,444 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 11:46:26,445 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-14 11:46:26,445 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-14 11:46:26,445 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-14 11:46:26,445 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-14 11:46:26,445 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-14 11:46:26,445 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-14 11:46:26,446 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-14 11:46:26,446 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-14 11:46:26,446 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-14 11:46:26,446 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-14 11:46:26,446 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-14 11:46:26,665 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-14 11:46:26,685 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-14 11:46:26,687 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-14 11:46:26,688 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-14 11:46:26,689 INFO L274 PluginConnector]: CDTParser initialized [2024-06-14 11:46:26,690 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix001.opt.i [2024-06-14 11:46:27,848 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-14 11:46:28,144 INFO L384 CDTParser]: Found 1 translation units. [2024-06-14 11:46:28,144 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix001.opt.i [2024-06-14 11:46:28,159 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fea3b0c2f/2436f3c6de344bc781eaa0550bfdd889/FLAG8f5a77006 [2024-06-14 11:46:28,172 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fea3b0c2f/2436f3c6de344bc781eaa0550bfdd889 [2024-06-14 11:46:28,174 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-14 11:46:28,175 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-14 11:46:28,176 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix001.opt.yml/witness.yml [2024-06-14 11:46:28,330 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-14 11:46:28,331 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-14 11:46:28,332 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-14 11:46:28,332 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-14 11:46:28,336 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-14 11:46:28,336 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 11:46:28" (1/2) ... [2024-06-14 11:46:28,337 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b62c140 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:46:28, skipping insertion in model container [2024-06-14 11:46:28,337 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 11:46:28" (1/2) ... [2024-06-14 11:46:28,338 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3741bb86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:46:28, skipping insertion in model container [2024-06-14 11:46:28,338 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 11:46:28" (2/2) ... [2024-06-14 11:46:28,339 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b62c140 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:46:28, skipping insertion in model container [2024-06-14 11:46:28,339 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 11:46:28" (2/2) ... [2024-06-14 11:46:28,340 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-14 11:46:28,420 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-14 11:46:28,421 INFO L97 edCorrectnessWitness]: Location invariant before [L859-L859] (((((((((((((((((((((! multithreaded || y$read_delayed_var == 0) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= y$w_buff1 && y$w_buff1 <= 1) && (y$w_buff1 == 0 || y$w_buff1 == 1)))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= y$w_buff0 && y$w_buff0 <= 1) && (y$w_buff0 == 0 || y$w_buff0 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= y$mem_tmp && y$mem_tmp <= 1) && (y$mem_tmp == 0 || y$mem_tmp == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) [2024-06-14 11:46:28,421 INFO L97 edCorrectnessWitness]: Location invariant before [L858-L858] (((((((((((((((((((((! multithreaded || y$read_delayed_var == 0) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= y$w_buff1 && y$w_buff1 <= 1) && (y$w_buff1 == 0 || y$w_buff1 == 1)))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= y$w_buff0 && y$w_buff0 <= 1) && (y$w_buff0 == 0 || y$w_buff0 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= y$mem_tmp && y$mem_tmp <= 1) && (y$mem_tmp == 0 || y$mem_tmp == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) [2024-06-14 11:46:28,421 INFO L97 edCorrectnessWitness]: Location invariant before [L856-L856] (((((((((((((((((((((! multithreaded || y$read_delayed_var == 0) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= y$w_buff1 && y$w_buff1 <= 1) && (y$w_buff1 == 0 || y$w_buff1 == 1)))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= y$w_buff0 && y$w_buff0 <= 1) && (y$w_buff0 == 0 || y$w_buff0 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= y$mem_tmp && y$mem_tmp <= 1) && (y$mem_tmp == 0 || y$mem_tmp == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) [2024-06-14 11:46:28,421 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-14 11:46:28,422 INFO L106 edCorrectnessWitness]: ghost_update [L854-L854] multithreaded = 1; [2024-06-14 11:46:28,461 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-14 11:46:28,786 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 11:46:28,794 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-14 11:46:28,918 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 11:46:28,952 INFO L206 MainTranslator]: Completed translation [2024-06-14 11:46:28,953 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:46:28 WrapperNode [2024-06-14 11:46:28,953 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-14 11:46:28,955 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-14 11:46:28,955 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-14 11:46:28,955 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-14 11:46:28,961 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 11:46:28" (1/1) ... [2024-06-14 11:46:28,991 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 11:46:28" (1/1) ... [2024-06-14 11:46:29,026 INFO L138 Inliner]: procedures = 175, calls = 49, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 151 [2024-06-14 11:46:29,030 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-14 11:46:29,030 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-14 11:46:29,031 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-14 11:46:29,031 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-14 11:46:29,039 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 11:46:28" (1/1) ... [2024-06-14 11:46:29,040 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 11:46:28" (1/1) ... [2024-06-14 11:46:29,054 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 11:46:28" (1/1) ... [2024-06-14 11:46:29,078 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 11:46:29,079 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 11:46:28" (1/1) ... [2024-06-14 11:46:29,079 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 11:46:28" (1/1) ... [2024-06-14 11:46:29,089 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 11:46:28" (1/1) ... [2024-06-14 11:46:29,098 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 11:46:28" (1/1) ... [2024-06-14 11:46:29,100 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 11:46:28" (1/1) ... [2024-06-14 11:46:29,106 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 11:46:28" (1/1) ... [2024-06-14 11:46:29,109 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-14 11:46:29,112 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-14 11:46:29,112 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-14 11:46:29,112 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-14 11:46:29,113 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 11:46:28" (1/1) ... [2024-06-14 11:46:29,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 11:46:29,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 11:46:29,178 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 11:46:29,194 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 11:46:29,228 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-14 11:46:29,229 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-14 11:46:29,229 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-14 11:46:29,229 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-14 11:46:29,229 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-14 11:46:29,229 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-14 11:46:29,230 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-14 11:46:29,230 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-14 11:46:29,230 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-14 11:46:29,230 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-14 11:46:29,230 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-14 11:46:29,231 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-14 11:46:29,232 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 11:46:29,367 INFO L244 CfgBuilder]: Building ICFG [2024-06-14 11:46:29,369 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-14 11:46:29,714 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-14 11:46:29,714 INFO L293 CfgBuilder]: Performing block encoding [2024-06-14 11:46:29,886 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-14 11:46:29,887 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-14 11:46:29,887 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 11:46:29 BoogieIcfgContainer [2024-06-14 11:46:29,888 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-14 11:46:29,890 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-14 11:46:29,890 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-14 11:46:29,893 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-14 11:46:29,893 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.06 11:46:28" (1/4) ... [2024-06-14 11:46:29,894 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ddbc946 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 11:46:29, skipping insertion in model container [2024-06-14 11:46:29,894 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 11:46:28" (2/4) ... [2024-06-14 11:46:29,894 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ddbc946 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 11:46:29, skipping insertion in model container [2024-06-14 11:46:29,894 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 11:46:28" (3/4) ... [2024-06-14 11:46:29,895 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ddbc946 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 11:46:29, skipping insertion in model container [2024-06-14 11:46:29,896 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 11:46:29" (4/4) ... [2024-06-14 11:46:29,897 INFO L112 eAbstractionObserver]: Analyzing ICFG mix001.opt.i [2024-06-14 11:46:29,910 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-14 11:46:29,910 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-14 11:46:29,910 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-14 11:46:29,952 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-14 11:46:29,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 54 places, 44 transitions, 100 flow [2024-06-14 11:46:30,009 INFO L124 PetriNetUnfolderBase]: 0/41 cut-off events. [2024-06-14 11:46:30,009 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 11:46:30,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51 conditions, 41 events. 0/41 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 77 event pairs, 0 based on Foata normal form. 0/38 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-14 11:46:30,011 INFO L82 GeneralOperation]: Start removeDead. Operand has 54 places, 44 transitions, 100 flow [2024-06-14 11:46:30,014 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 45 places, 35 transitions, 79 flow [2024-06-14 11:46:30,027 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-14 11:46:30,034 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;@33e93d34, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-14 11:46:30,035 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-14 11:46:30,039 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-14 11:46:30,039 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-14 11:46:30,039 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 11:46:30,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:46:30,040 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-14 11:46:30,040 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 11:46:30,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:46:30,081 INFO L85 PathProgramCache]: Analyzing trace with hash -408876045, now seen corresponding path program 1 times [2024-06-14 11:46:30,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:46:30,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618796171] [2024-06-14 11:46:30,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:46:30,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:46:30,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:46:31,297 INFO 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 11:46:31,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:46:31,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618796171] [2024-06-14 11:46:31,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618796171] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:46:31,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:46:31,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-14 11:46:31,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435147262] [2024-06-14 11:46:31,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:46:31,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-14 11:46:31,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:46:31,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-14 11:46:31,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-14 11:46:31,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 44 [2024-06-14 11:46:31,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 35 transitions, 79 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 11:46:31,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:46:31,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 44 [2024-06-14 11:46:31,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:46:31,722 INFO L124 PetriNetUnfolderBase]: 869/1414 cut-off events. [2024-06-14 11:46:31,722 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2024-06-14 11:46:31,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2794 conditions, 1414 events. 869/1414 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 7483 event pairs, 566 based on Foata normal form. 1/1356 useless extension candidates. Maximal degree in co-relation 2779. Up to 1315 conditions per place. [2024-06-14 11:46:31,739 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 32 selfloop transitions, 4 changer transitions 0/45 dead transitions. [2024-06-14 11:46:31,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 45 transitions, 177 flow [2024-06-14 11:46:31,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-14 11:46:31,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-14 11:46:31,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 84 transitions. [2024-06-14 11:46:31,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6363636363636364 [2024-06-14 11:46:31,752 INFO L175 Difference]: Start difference. First operand has 45 places, 35 transitions, 79 flow. Second operand 3 states and 84 transitions. [2024-06-14 11:46:31,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 45 transitions, 177 flow [2024-06-14 11:46:31,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 45 transitions, 172 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-14 11:46:31,757 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 106 flow [2024-06-14 11:46:31,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2024-06-14 11:46:31,760 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 0 predicate places. [2024-06-14 11:46:31,760 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 106 flow [2024-06-14 11:46:31,761 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 11:46:31,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:46:31,761 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:46:31,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-14 11:46:31,761 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 11:46:31,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:46:31,762 INFO L85 PathProgramCache]: Analyzing trace with hash -2087833902, now seen corresponding path program 1 times [2024-06-14 11:46:31,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:46:31,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728898918] [2024-06-14 11:46:31,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:46:31,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:46:31,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:46:32,586 INFO 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 11:46:32,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:46:32,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728898918] [2024-06-14 11:46:32,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728898918] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:46:32,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:46:32,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 11:46:32,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816946365] [2024-06-14 11:46:32,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:46:32,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 11:46:32,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:46:32,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 11:46:32,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-14 11:46:32,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-06-14 11:46:32,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 106 flow. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:46:32,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:46:32,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-06-14 11:46:32,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:46:32,922 INFO L124 PetriNetUnfolderBase]: 1280/1981 cut-off events. [2024-06-14 11:46:32,923 INFO L125 PetriNetUnfolderBase]: For 406/406 co-relation queries the response was YES. [2024-06-14 11:46:32,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4504 conditions, 1981 events. 1280/1981 cut-off events. For 406/406 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 10135 event pairs, 750 based on Foata normal form. 3/1964 useless extension candidates. Maximal degree in co-relation 4489. Up to 1897 conditions per place. [2024-06-14 11:46:32,937 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 41 selfloop transitions, 7 changer transitions 0/55 dead transitions. [2024-06-14 11:46:32,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 55 transitions, 248 flow [2024-06-14 11:46:32,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 11:46:32,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 11:46:32,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 103 transitions. [2024-06-14 11:46:32,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5852272727272727 [2024-06-14 11:46:32,939 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 106 flow. Second operand 4 states and 103 transitions. [2024-06-14 11:46:32,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 55 transitions, 248 flow [2024-06-14 11:46:32,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 55 transitions, 244 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 11:46:32,941 INFO L231 Difference]: Finished difference. Result has 48 places, 41 transitions, 142 flow [2024-06-14 11:46:32,941 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=142, PETRI_PLACES=48, PETRI_TRANSITIONS=41} [2024-06-14 11:46:32,942 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 3 predicate places. [2024-06-14 11:46:32,942 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 41 transitions, 142 flow [2024-06-14 11:46:32,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:46:32,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:46:32,942 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:46:32,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-14 11:46:32,943 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 11:46:32,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:46:32,943 INFO L85 PathProgramCache]: Analyzing trace with hash -298340792, now seen corresponding path program 1 times [2024-06-14 11:46:32,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:46:32,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026992846] [2024-06-14 11:46:32,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:46:32,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:46:32,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:46:34,020 INFO 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 11:46:34,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:46:34,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026992846] [2024-06-14 11:46:34,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026992846] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:46:34,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:46:34,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 11:46:34,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392697099] [2024-06-14 11:46:34,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:46:34,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 11:46:34,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:46:34,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 11:46:34,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 11:46:34,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-06-14 11:46:34,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 41 transitions, 142 flow. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:46:34,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:46:34,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-06-14 11:46:34,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:46:34,380 INFO L124 PetriNetUnfolderBase]: 1274/1994 cut-off events. [2024-06-14 11:46:34,381 INFO L125 PetriNetUnfolderBase]: For 1138/1138 co-relation queries the response was YES. [2024-06-14 11:46:34,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5025 conditions, 1994 events. 1274/1994 cut-off events. For 1138/1138 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 10297 event pairs, 608 based on Foata normal form. 3/1991 useless extension candidates. Maximal degree in co-relation 5008. Up to 1873 conditions per place. [2024-06-14 11:46:34,390 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 48 selfloop transitions, 10 changer transitions 0/65 dead transitions. [2024-06-14 11:46:34,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 65 transitions, 326 flow [2024-06-14 11:46:34,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:46:34,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:46:34,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 126 transitions. [2024-06-14 11:46:34,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5727272727272728 [2024-06-14 11:46:34,392 INFO L175 Difference]: Start difference. First operand has 48 places, 41 transitions, 142 flow. Second operand 5 states and 126 transitions. [2024-06-14 11:46:34,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 65 transitions, 326 flow [2024-06-14 11:46:34,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 65 transitions, 312 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-14 11:46:34,395 INFO L231 Difference]: Finished difference. Result has 51 places, 44 transitions, 178 flow [2024-06-14 11:46:34,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=178, PETRI_PLACES=51, PETRI_TRANSITIONS=44} [2024-06-14 11:46:34,395 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 6 predicate places. [2024-06-14 11:46:34,396 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 44 transitions, 178 flow [2024-06-14 11:46:34,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:46:34,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:46:34,396 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:46:34,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-14 11:46:34,396 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 11:46:34,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:46:34,397 INFO L85 PathProgramCache]: Analyzing trace with hash 848620301, now seen corresponding path program 1 times [2024-06-14 11:46:34,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:46:34,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591325522] [2024-06-14 11:46:34,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:46:34,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:46:34,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:46:35,103 INFO 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 11:46:35,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:46:35,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591325522] [2024-06-14 11:46:35,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591325522] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:46:35,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:46:35,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:46:35,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324787335] [2024-06-14 11:46:35,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:46:35,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:46:35,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:46:35,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:46:35,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:46:35,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-14 11:46:35,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 44 transitions, 178 flow. Second operand has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:46:35,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:46:35,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-14 11:46:35,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:46:35,615 INFO L124 PetriNetUnfolderBase]: 1542/2450 cut-off events. [2024-06-14 11:46:35,616 INFO L125 PetriNetUnfolderBase]: For 2318/2318 co-relation queries the response was YES. [2024-06-14 11:46:35,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6596 conditions, 2450 events. 1542/2450 cut-off events. For 2318/2318 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 12794 event pairs, 853 based on Foata normal form. 2/2415 useless extension candidates. Maximal degree in co-relation 6578. Up to 2282 conditions per place. [2024-06-14 11:46:35,628 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 42 selfloop transitions, 8 changer transitions 0/58 dead transitions. [2024-06-14 11:46:35,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 58 transitions, 320 flow [2024-06-14 11:46:35,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:46:35,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:46:35,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 107 transitions. [2024-06-14 11:46:35,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4863636363636364 [2024-06-14 11:46:35,629 INFO L175 Difference]: Start difference. First operand has 51 places, 44 transitions, 178 flow. Second operand 5 states and 107 transitions. [2024-06-14 11:46:35,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 58 transitions, 320 flow [2024-06-14 11:46:35,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 58 transitions, 296 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-14 11:46:35,632 INFO L231 Difference]: Finished difference. Result has 53 places, 47 transitions, 198 flow [2024-06-14 11:46:35,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=198, PETRI_PLACES=53, PETRI_TRANSITIONS=47} [2024-06-14 11:46:35,633 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 8 predicate places. [2024-06-14 11:46:35,633 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 47 transitions, 198 flow [2024-06-14 11:46:35,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:46:35,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:46:35,634 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:46:35,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-14 11:46:35,634 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:46:35,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:46:35,634 INFO L85 PathProgramCache]: Analyzing trace with hash -1582442352, now seen corresponding path program 1 times [2024-06-14 11:46:35,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:46:35,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335241739] [2024-06-14 11:46:35,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:46:35,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:46:35,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:46:37,070 INFO 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 11:46:37,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:46:37,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335241739] [2024-06-14 11:46:37,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335241739] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:46:37,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:46:37,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:46:37,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242155934] [2024-06-14 11:46:37,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:46:37,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:46:37,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:46:37,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:46:37,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:46:37,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-14 11:46:37,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 47 transitions, 198 flow. Second operand has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:46:37,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:46:37,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-14 11:46:37,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:46:37,607 INFO L124 PetriNetUnfolderBase]: 1763/2719 cut-off events. [2024-06-14 11:46:37,607 INFO L125 PetriNetUnfolderBase]: For 4389/4389 co-relation queries the response was YES. [2024-06-14 11:46:37,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7980 conditions, 2719 events. 1763/2719 cut-off events. For 4389/4389 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 13835 event pairs, 617 based on Foata normal form. 6/2708 useless extension candidates. Maximal degree in co-relation 7960. Up to 2517 conditions per place. [2024-06-14 11:46:37,622 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 62 selfloop transitions, 15 changer transitions 0/84 dead transitions. [2024-06-14 11:46:37,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 84 transitions, 456 flow [2024-06-14 11:46:37,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:46:37,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:46:37,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 162 transitions. [2024-06-14 11:46:37,624 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.525974025974026 [2024-06-14 11:46:37,624 INFO L175 Difference]: Start difference. First operand has 53 places, 47 transitions, 198 flow. Second operand 7 states and 162 transitions. [2024-06-14 11:46:37,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 84 transitions, 456 flow [2024-06-14 11:46:37,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 84 transitions, 436 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-14 11:46:37,627 INFO L231 Difference]: Finished difference. Result has 57 places, 51 transitions, 245 flow [2024-06-14 11:46:37,627 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=245, PETRI_PLACES=57, PETRI_TRANSITIONS=51} [2024-06-14 11:46:37,628 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 12 predicate places. [2024-06-14 11:46:37,628 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 51 transitions, 245 flow [2024-06-14 11:46:37,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:46:37,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:46:37,628 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:46:37,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-14 11:46:37,629 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 11:46:37,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:46:37,629 INFO L85 PathProgramCache]: Analyzing trace with hash 537427222, now seen corresponding path program 1 times [2024-06-14 11:46:37,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:46:37,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272015993] [2024-06-14 11:46:37,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:46:37,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:46:37,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:46:38,376 INFO 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 11:46:38,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:46:38,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272015993] [2024-06-14 11:46:38,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272015993] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:46:38,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:46:38,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:46:38,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898703690] [2024-06-14 11:46:38,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:46:38,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:46:38,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:46:38,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:46:38,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:46:38,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-14 11:46:38,453 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 51 transitions, 245 flow. Second operand has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:46:38,453 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:46:38,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-14 11:46:38,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:46:38,983 INFO L124 PetriNetUnfolderBase]: 1516/2446 cut-off events. [2024-06-14 11:46:38,983 INFO L125 PetriNetUnfolderBase]: For 5299/5299 co-relation queries the response was YES. [2024-06-14 11:46:38,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7634 conditions, 2446 events. 1516/2446 cut-off events. For 5299/5299 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 12919 event pairs, 653 based on Foata normal form. 4/2430 useless extension candidates. Maximal degree in co-relation 7613. Up to 2235 conditions per place. [2024-06-14 11:46:38,997 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 51 selfloop transitions, 11 changer transitions 0/70 dead transitions. [2024-06-14 11:46:38,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 70 transitions, 429 flow [2024-06-14 11:46:38,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:46:38,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:46:38,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 126 transitions. [2024-06-14 11:46:38,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-06-14 11:46:38,998 INFO L175 Difference]: Start difference. First operand has 57 places, 51 transitions, 245 flow. Second operand 6 states and 126 transitions. [2024-06-14 11:46:38,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 70 transitions, 429 flow [2024-06-14 11:46:39,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 70 transitions, 390 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-14 11:46:39,003 INFO L231 Difference]: Finished difference. Result has 59 places, 54 transitions, 262 flow [2024-06-14 11:46:39,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=262, PETRI_PLACES=59, PETRI_TRANSITIONS=54} [2024-06-14 11:46:39,006 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 14 predicate places. [2024-06-14 11:46:39,006 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 54 transitions, 262 flow [2024-06-14 11:46:39,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:46:39,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:46:39,006 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:46:39,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-14 11:46:39,007 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 11:46:39,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:46:39,007 INFO L85 PathProgramCache]: Analyzing trace with hash 503451168, now seen corresponding path program 1 times [2024-06-14 11:46:39,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:46:39,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820683268] [2024-06-14 11:46:39,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:46:39,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:46:39,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:46:39,749 INFO 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 11:46:39,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:46:39,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820683268] [2024-06-14 11:46:39,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820683268] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:46:39,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:46:39,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:46:39,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013083370] [2024-06-14 11:46:39,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:46:39,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:46:39,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:46:39,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:46:39,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:46:39,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:46:39,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 54 transitions, 262 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:46:39,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:46:39,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:46:39,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:46:40,359 INFO L124 PetriNetUnfolderBase]: 1880/2834 cut-off events. [2024-06-14 11:46:40,360 INFO L125 PetriNetUnfolderBase]: For 8474/8480 co-relation queries the response was YES. [2024-06-14 11:46:40,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9599 conditions, 2834 events. 1880/2834 cut-off events. For 8474/8480 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 13913 event pairs, 777 based on Foata normal form. 6/2836 useless extension candidates. Maximal degree in co-relation 9576. Up to 2734 conditions per place. [2024-06-14 11:46:40,378 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 59 selfloop transitions, 16 changer transitions 0/80 dead transitions. [2024-06-14 11:46:40,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 80 transitions, 530 flow [2024-06-14 11:46:40,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:46:40,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:46:40,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 122 transitions. [2024-06-14 11:46:40,380 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4621212121212121 [2024-06-14 11:46:40,381 INFO L175 Difference]: Start difference. First operand has 59 places, 54 transitions, 262 flow. Second operand 6 states and 122 transitions. [2024-06-14 11:46:40,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 80 transitions, 530 flow [2024-06-14 11:46:40,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 80 transitions, 498 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-14 11:46:40,385 INFO L231 Difference]: Finished difference. Result has 61 places, 60 transitions, 320 flow [2024-06-14 11:46:40,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=320, PETRI_PLACES=61, PETRI_TRANSITIONS=60} [2024-06-14 11:46:40,386 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 16 predicate places. [2024-06-14 11:46:40,386 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 60 transitions, 320 flow [2024-06-14 11:46:40,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:46:40,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:46:40,387 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:46:40,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-14 11:46:40,387 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 11:46:40,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:46:40,387 INFO L85 PathProgramCache]: Analyzing trace with hash 511674228, now seen corresponding path program 2 times [2024-06-14 11:46:40,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:46:40,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176185302] [2024-06-14 11:46:40,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:46:40,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:46:40,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:46:41,194 INFO 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 11:46:41,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:46:41,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176185302] [2024-06-14 11:46:41,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176185302] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:46:41,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:46:41,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:46:41,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158594104] [2024-06-14 11:46:41,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:46:41,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:46:41,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:46:41,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:46:41,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:46:41,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:46:41,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 60 transitions, 320 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:46:41,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:46:41,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:46:41,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:46:41,813 INFO L124 PetriNetUnfolderBase]: 1875/2828 cut-off events. [2024-06-14 11:46:41,814 INFO L125 PetriNetUnfolderBase]: For 10983/10998 co-relation queries the response was YES. [2024-06-14 11:46:41,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10175 conditions, 2828 events. 1875/2828 cut-off events. For 10983/10998 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 13864 event pairs, 780 based on Foata normal form. 12/2835 useless extension candidates. Maximal degree in co-relation 10151. Up to 2729 conditions per place. [2024-06-14 11:46:41,831 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 54 selfloop transitions, 16 changer transitions 0/75 dead transitions. [2024-06-14 11:46:41,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 75 transitions, 498 flow [2024-06-14 11:46:41,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:46:41,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:46:41,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 117 transitions. [2024-06-14 11:46:41,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-06-14 11:46:41,835 INFO L175 Difference]: Start difference. First operand has 61 places, 60 transitions, 320 flow. Second operand 6 states and 117 transitions. [2024-06-14 11:46:41,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 75 transitions, 498 flow [2024-06-14 11:46:41,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 75 transitions, 462 flow, removed 14 selfloop flow, removed 2 redundant places. [2024-06-14 11:46:41,843 INFO L231 Difference]: Finished difference. Result has 65 places, 60 transitions, 324 flow [2024-06-14 11:46:41,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=324, PETRI_PLACES=65, PETRI_TRANSITIONS=60} [2024-06-14 11:46:41,846 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 20 predicate places. [2024-06-14 11:46:41,846 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 60 transitions, 324 flow [2024-06-14 11:46:41,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:46:41,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:46:41,847 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:46:41,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-14 11:46:41,847 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 11:46:41,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:46:41,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1897588004, now seen corresponding path program 1 times [2024-06-14 11:46:41,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:46:41,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489528041] [2024-06-14 11:46:41,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:46:41,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:46:41,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:46:42,607 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 11:46:42,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:46:42,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489528041] [2024-06-14 11:46:42,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489528041] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:46:42,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:46:42,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:46:42,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678470068] [2024-06-14 11:46:42,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:46:42,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:46:42,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:46:42,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:46:42,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:46:42,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:46:42,672 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 60 transitions, 324 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:46:42,672 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:46:42,672 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:46:42,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:46:43,258 INFO L124 PetriNetUnfolderBase]: 1972/2981 cut-off events. [2024-06-14 11:46:43,258 INFO L125 PetriNetUnfolderBase]: For 13400/13410 co-relation queries the response was YES. [2024-06-14 11:46:43,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11102 conditions, 2981 events. 1972/2981 cut-off events. For 13400/13410 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 14652 event pairs, 755 based on Foata normal form. 10/2987 useless extension candidates. Maximal degree in co-relation 11076. Up to 2769 conditions per place. [2024-06-14 11:46:43,273 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 75 selfloop transitions, 41 changer transitions 0/121 dead transitions. [2024-06-14 11:46:43,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 121 transitions, 946 flow [2024-06-14 11:46:43,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:46:43,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:46:43,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 166 transitions. [2024-06-14 11:46:43,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4715909090909091 [2024-06-14 11:46:43,275 INFO L175 Difference]: Start difference. First operand has 65 places, 60 transitions, 324 flow. Second operand 8 states and 166 transitions. [2024-06-14 11:46:43,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 121 transitions, 946 flow [2024-06-14 11:46:43,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 121 transitions, 881 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-14 11:46:43,295 INFO L231 Difference]: Finished difference. Result has 71 places, 87 transitions, 606 flow [2024-06-14 11:46:43,295 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=606, PETRI_PLACES=71, PETRI_TRANSITIONS=87} [2024-06-14 11:46:43,295 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 26 predicate places. [2024-06-14 11:46:43,295 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 87 transitions, 606 flow [2024-06-14 11:46:43,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:46:43,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:46:43,296 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:46:43,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-14 11:46:43,296 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 11:46:43,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:46:43,297 INFO L85 PathProgramCache]: Analyzing trace with hash 1063904912, now seen corresponding path program 2 times [2024-06-14 11:46:43,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:46:43,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866111796] [2024-06-14 11:46:43,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:46:43,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:46:43,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:46:44,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:46:44,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:46:44,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866111796] [2024-06-14 11:46:44,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866111796] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:46:44,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:46:44,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:46:44,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931315755] [2024-06-14 11:46:44,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:46:44,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:46:44,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:46:44,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:46:44,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:46:44,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:46:44,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 87 transitions, 606 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:46:44,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:46:44,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:46:44,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:46:44,775 INFO L124 PetriNetUnfolderBase]: 1988/3003 cut-off events. [2024-06-14 11:46:44,776 INFO L125 PetriNetUnfolderBase]: For 16997/17011 co-relation queries the response was YES. [2024-06-14 11:46:44,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12117 conditions, 3003 events. 1988/3003 cut-off events. For 16997/17011 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 14721 event pairs, 760 based on Foata normal form. 16/3015 useless extension candidates. Maximal degree in co-relation 12087. Up to 2787 conditions per place. [2024-06-14 11:46:44,795 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 67 selfloop transitions, 49 changer transitions 0/121 dead transitions. [2024-06-14 11:46:44,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 121 transitions, 1036 flow [2024-06-14 11:46:44,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:46:44,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:46:44,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 143 transitions. [2024-06-14 11:46:44,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-14 11:46:44,797 INFO L175 Difference]: Start difference. First operand has 71 places, 87 transitions, 606 flow. Second operand 7 states and 143 transitions. [2024-06-14 11:46:44,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 121 transitions, 1036 flow [2024-06-14 11:46:44,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 121 transitions, 1002 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-06-14 11:46:44,810 INFO L231 Difference]: Finished difference. Result has 76 places, 93 transitions, 755 flow [2024-06-14 11:46:44,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=572, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=755, PETRI_PLACES=76, PETRI_TRANSITIONS=93} [2024-06-14 11:46:44,811 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 31 predicate places. [2024-06-14 11:46:44,812 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 93 transitions, 755 flow [2024-06-14 11:46:44,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:46:44,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:46:44,812 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:46:44,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-14 11:46:44,812 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 11:46:44,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:46:44,813 INFO L85 PathProgramCache]: Analyzing trace with hash -1572881309, now seen corresponding path program 1 times [2024-06-14 11:46:44,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:46:44,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354902265] [2024-06-14 11:46:44,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:46:44,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:46:44,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:46:45,608 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 11:46:45,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:46:45,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354902265] [2024-06-14 11:46:45,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354902265] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:46:45,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:46:45,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:46:45,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147084627] [2024-06-14 11:46:45,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:46:45,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:46:45,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:46:45,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:46:45,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:46:45,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:46:45,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 93 transitions, 755 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:46:45,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:46:45,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:46:45,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:46:46,356 INFO L124 PetriNetUnfolderBase]: 2010/3040 cut-off events. [2024-06-14 11:46:46,356 INFO L125 PetriNetUnfolderBase]: For 19727/19741 co-relation queries the response was YES. [2024-06-14 11:46:46,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12589 conditions, 3040 events. 2010/3040 cut-off events. For 19727/19741 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 14965 event pairs, 710 based on Foata normal form. 13/3049 useless extension candidates. Maximal degree in co-relation 12557. Up to 2832 conditions per place. [2024-06-14 11:46:46,370 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 93 selfloop transitions, 30 changer transitions 0/128 dead transitions. [2024-06-14 11:46:46,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 128 transitions, 1189 flow [2024-06-14 11:46:46,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:46:46,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:46:46,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 144 transitions. [2024-06-14 11:46:46,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4675324675324675 [2024-06-14 11:46:46,371 INFO L175 Difference]: Start difference. First operand has 76 places, 93 transitions, 755 flow. Second operand 7 states and 144 transitions. [2024-06-14 11:46:46,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 128 transitions, 1189 flow [2024-06-14 11:46:46,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 128 transitions, 1065 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-14 11:46:46,383 INFO L231 Difference]: Finished difference. Result has 78 places, 99 transitions, 766 flow [2024-06-14 11:46:46,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=635, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=766, PETRI_PLACES=78, PETRI_TRANSITIONS=99} [2024-06-14 11:46:46,384 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 33 predicate places. [2024-06-14 11:46:46,384 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 99 transitions, 766 flow [2024-06-14 11:46:46,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:46:46,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:46:46,385 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:46:46,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-14 11:46:46,385 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:46:46,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:46:46,385 INFO L85 PathProgramCache]: Analyzing trace with hash 1918622500, now seen corresponding path program 3 times [2024-06-14 11:46:46,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:46:46,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428459633] [2024-06-14 11:46:46,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:46:46,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:46:46,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:46:47,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:46:47,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:46:47,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428459633] [2024-06-14 11:46:47,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428459633] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:46:47,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:46:47,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:46:47,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414811018] [2024-06-14 11:46:47,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:46:47,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:46:47,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:46:47,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:46:47,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:46:47,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:46:47,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 99 transitions, 766 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:46:47,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:46:47,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:46:47,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:46:48,016 INFO L124 PetriNetUnfolderBase]: 2033/3074 cut-off events. [2024-06-14 11:46:48,016 INFO L125 PetriNetUnfolderBase]: For 20753/20756 co-relation queries the response was YES. [2024-06-14 11:46:48,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13008 conditions, 3074 events. 2033/3074 cut-off events. For 20753/20756 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 15128 event pairs, 745 based on Foata normal form. 7/3077 useless extension candidates. Maximal degree in co-relation 12976. Up to 2845 conditions per place. [2024-06-14 11:46:48,033 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 73 selfloop transitions, 55 changer transitions 0/133 dead transitions. [2024-06-14 11:46:48,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 133 transitions, 1244 flow [2024-06-14 11:46:48,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:46:48,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:46:48,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 141 transitions. [2024-06-14 11:46:48,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4577922077922078 [2024-06-14 11:46:48,035 INFO L175 Difference]: Start difference. First operand has 78 places, 99 transitions, 766 flow. Second operand 7 states and 141 transitions. [2024-06-14 11:46:48,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 133 transitions, 1244 flow [2024-06-14 11:46:48,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 133 transitions, 1205 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-14 11:46:48,051 INFO L231 Difference]: Finished difference. Result has 82 places, 108 transitions, 954 flow [2024-06-14 11:46:48,051 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=727, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=954, PETRI_PLACES=82, PETRI_TRANSITIONS=108} [2024-06-14 11:46:48,051 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 37 predicate places. [2024-06-14 11:46:48,051 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 108 transitions, 954 flow [2024-06-14 11:46:48,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:46:48,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:46:48,052 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:46:48,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-14 11:46:48,052 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 11:46:48,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:46:48,053 INFO L85 PathProgramCache]: Analyzing trace with hash -1343617709, now seen corresponding path program 2 times [2024-06-14 11:46:48,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:46:48,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666982132] [2024-06-14 11:46:48,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:46:48,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:46:48,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:46:48,801 INFO 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 11:46:48,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:46:48,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666982132] [2024-06-14 11:46:48,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666982132] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:46:48,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:46:48,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:46:48,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801191761] [2024-06-14 11:46:48,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:46:48,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:46:48,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:46:48,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:46:48,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:46:48,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:46:48,867 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 108 transitions, 954 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:46:48,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:46:48,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:46:48,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:46:49,560 INFO L124 PetriNetUnfolderBase]: 2055/3107 cut-off events. [2024-06-14 11:46:49,560 INFO L125 PetriNetUnfolderBase]: For 24239/24263 co-relation queries the response was YES. [2024-06-14 11:46:49,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13612 conditions, 3107 events. 2055/3107 cut-off events. For 24239/24263 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 15251 event pairs, 703 based on Foata normal form. 20/3120 useless extension candidates. Maximal degree in co-relation 13578. Up to 2884 conditions per place. [2024-06-14 11:46:49,576 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 97 selfloop transitions, 35 changer transitions 0/137 dead transitions. [2024-06-14 11:46:49,577 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 137 transitions, 1380 flow [2024-06-14 11:46:49,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:46:49,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:46:49,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-14 11:46:49,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4512987012987013 [2024-06-14 11:46:49,578 INFO L175 Difference]: Start difference. First operand has 82 places, 108 transitions, 954 flow. Second operand 7 states and 139 transitions. [2024-06-14 11:46:49,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 137 transitions, 1380 flow [2024-06-14 11:46:49,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 137 transitions, 1259 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-14 11:46:49,623 INFO L231 Difference]: Finished difference. Result has 85 places, 111 transitions, 945 flow [2024-06-14 11:46:49,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=833, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=945, PETRI_PLACES=85, PETRI_TRANSITIONS=111} [2024-06-14 11:46:49,625 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 40 predicate places. [2024-06-14 11:46:49,625 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 111 transitions, 945 flow [2024-06-14 11:46:49,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:46:49,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:46:49,636 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:46:49,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-14 11:46:49,637 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 11:46:49,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:46:49,637 INFO L85 PathProgramCache]: Analyzing trace with hash 1020047880, now seen corresponding path program 4 times [2024-06-14 11:46:49,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:46:49,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436054683] [2024-06-14 11:46:49,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:46:49,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:46:49,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:46:50,422 INFO 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 11:46:50,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:46:50,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436054683] [2024-06-14 11:46:50,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436054683] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:46:50,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:46:50,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:46:50,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116117494] [2024-06-14 11:46:50,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:46:50,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:46:50,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:46:50,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:46:50,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:46:50,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:46:50,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 111 transitions, 945 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:46:50,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:46:50,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:46:50,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:46:51,141 INFO L124 PetriNetUnfolderBase]: 2044/3098 cut-off events. [2024-06-14 11:46:51,142 INFO L125 PetriNetUnfolderBase]: For 27186/27195 co-relation queries the response was YES. [2024-06-14 11:46:51,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13693 conditions, 3098 events. 2044/3098 cut-off events. For 27186/27195 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 15282 event pairs, 749 based on Foata normal form. 7/3094 useless extension candidates. Maximal degree in co-relation 13658. Up to 2866 conditions per place. [2024-06-14 11:46:51,158 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 71 selfloop transitions, 55 changer transitions 0/131 dead transitions. [2024-06-14 11:46:51,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 131 transitions, 1265 flow [2024-06-14 11:46:51,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:46:51,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:46:51,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-14 11:46:51,160 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44155844155844154 [2024-06-14 11:46:51,160 INFO L175 Difference]: Start difference. First operand has 85 places, 111 transitions, 945 flow. Second operand 7 states and 136 transitions. [2024-06-14 11:46:51,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 131 transitions, 1265 flow [2024-06-14 11:46:51,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 131 transitions, 1149 flow, removed 32 selfloop flow, removed 4 redundant places. [2024-06-14 11:46:51,183 INFO L231 Difference]: Finished difference. Result has 88 places, 111 transitions, 954 flow [2024-06-14 11:46:51,183 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=829, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=954, PETRI_PLACES=88, PETRI_TRANSITIONS=111} [2024-06-14 11:46:51,183 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 43 predicate places. [2024-06-14 11:46:51,184 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 111 transitions, 954 flow [2024-06-14 11:46:51,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:46:51,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:46:51,184 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:46:51,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-14 11:46:51,184 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 11:46:51,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:46:51,185 INFO L85 PathProgramCache]: Analyzing trace with hash 1925974367, now seen corresponding path program 3 times [2024-06-14 11:46:51,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:46:51,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782785293] [2024-06-14 11:46:51,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:46:51,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:46:51,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:46:51,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:46:51,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:46:51,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782785293] [2024-06-14 11:46:51,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782785293] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:46:51,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:46:51,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:46:51,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252466973] [2024-06-14 11:46:51,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:46:51,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:46:51,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:46:51,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:46:51,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:46:52,026 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:46:52,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 111 transitions, 954 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:46:52,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:46:52,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:46:52,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:46:52,690 INFO L124 PetriNetUnfolderBase]: 2034/3079 cut-off events. [2024-06-14 11:46:52,691 INFO L125 PetriNetUnfolderBase]: For 29849/29864 co-relation queries the response was YES. [2024-06-14 11:46:52,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13820 conditions, 3079 events. 2034/3079 cut-off events. For 29849/29864 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 15122 event pairs, 701 based on Foata normal form. 14/3086 useless extension candidates. Maximal degree in co-relation 13784. Up to 2861 conditions per place. [2024-06-14 11:46:52,707 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 99 selfloop transitions, 33 changer transitions 0/137 dead transitions. [2024-06-14 11:46:52,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 137 transitions, 1306 flow [2024-06-14 11:46:52,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:46:52,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:46:52,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-14 11:46:52,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4512987012987013 [2024-06-14 11:46:52,710 INFO L175 Difference]: Start difference. First operand has 88 places, 111 transitions, 954 flow. Second operand 7 states and 139 transitions. [2024-06-14 11:46:52,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 137 transitions, 1306 flow [2024-06-14 11:46:52,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 137 transitions, 1111 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-14 11:46:52,729 INFO L231 Difference]: Finished difference. Result has 87 places, 111 transitions, 834 flow [2024-06-14 11:46:52,729 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=759, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=834, PETRI_PLACES=87, PETRI_TRANSITIONS=111} [2024-06-14 11:46:52,730 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 42 predicate places. [2024-06-14 11:46:52,730 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 111 transitions, 834 flow [2024-06-14 11:46:52,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:46:52,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:46:52,730 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:46:52,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-14 11:46:52,730 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:46:52,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:46:52,731 INFO L85 PathProgramCache]: Analyzing trace with hash -33405023, now seen corresponding path program 1 times [2024-06-14 11:46:52,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:46:52,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534713316] [2024-06-14 11:46:52,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:46:52,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:46:52,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:46:53,529 INFO 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 11:46:53,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:46:53,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534713316] [2024-06-14 11:46:53,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534713316] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:46:53,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:46:53,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:46:53,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737235037] [2024-06-14 11:46:53,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:46:53,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:46:53,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:46:53,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:46:53,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:46:53,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 44 [2024-06-14 11:46:53,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 111 transitions, 834 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 11:46:53,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:46:53,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 44 [2024-06-14 11:46:53,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:46:53,955 INFO L124 PetriNetUnfolderBase]: 1432/2445 cut-off events. [2024-06-14 11:46:53,955 INFO L125 PetriNetUnfolderBase]: For 26424/26442 co-relation queries the response was YES. [2024-06-14 11:46:53,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10730 conditions, 2445 events. 1432/2445 cut-off events. For 26424/26442 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 13770 event pairs, 585 based on Foata normal form. 19/2461 useless extension candidates. Maximal degree in co-relation 10694. Up to 2059 conditions per place. [2024-06-14 11:46:53,969 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 70 selfloop transitions, 8 changer transitions 0/122 dead transitions. [2024-06-14 11:46:53,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 122 transitions, 1034 flow [2024-06-14 11:46:53,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:46:53,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:46:53,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 110 transitions. [2024-06-14 11:46:53,971 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-14 11:46:53,971 INFO L175 Difference]: Start difference. First operand has 87 places, 111 transitions, 834 flow. Second operand 5 states and 110 transitions. [2024-06-14 11:46:53,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 122 transitions, 1034 flow [2024-06-14 11:46:53,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 122 transitions, 941 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-14 11:46:53,988 INFO L231 Difference]: Finished difference. Result has 85 places, 114 transitions, 789 flow [2024-06-14 11:46:53,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=741, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=789, PETRI_PLACES=85, PETRI_TRANSITIONS=114} [2024-06-14 11:46:53,989 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 40 predicate places. [2024-06-14 11:46:53,989 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 114 transitions, 789 flow [2024-06-14 11:46:53,989 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 11:46:53,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:46:53,989 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:46:53,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-14 11:46:53,990 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 11:46:53,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:46:53,990 INFO L85 PathProgramCache]: Analyzing trace with hash 1028305867, now seen corresponding path program 1 times [2024-06-14 11:46:53,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:46:53,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195610843] [2024-06-14 11:46:53,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:46:53,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:46:53,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:46:55,050 INFO 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 11:46:55,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:46:55,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195610843] [2024-06-14 11:46:55,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195610843] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:46:55,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:46:55,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:46:55,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875561851] [2024-06-14 11:46:55,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:46:55,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:46:55,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:46:55,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:46:55,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:46:55,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:46:55,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 114 transitions, 789 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:46:55,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:46:55,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:46:55,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:46:55,829 INFO L124 PetriNetUnfolderBase]: 2042/3090 cut-off events. [2024-06-14 11:46:55,830 INFO L125 PetriNetUnfolderBase]: For 34752/34756 co-relation queries the response was YES. [2024-06-14 11:46:55,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14363 conditions, 3090 events. 2042/3090 cut-off events. For 34752/34756 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 15211 event pairs, 707 based on Foata normal form. 6/3093 useless extension candidates. Maximal degree in co-relation 14326. Up to 2929 conditions per place. [2024-06-14 11:46:55,846 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 121 selfloop transitions, 24 changer transitions 0/150 dead transitions. [2024-06-14 11:46:55,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 150 transitions, 1221 flow [2024-06-14 11:46:55,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:46:55,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:46:55,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-14 11:46:55,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44886363636363635 [2024-06-14 11:46:55,848 INFO L175 Difference]: Start difference. First operand has 85 places, 114 transitions, 789 flow. Second operand 8 states and 158 transitions. [2024-06-14 11:46:55,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 150 transitions, 1221 flow [2024-06-14 11:46:55,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 150 transitions, 1195 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-14 11:46:55,868 INFO L231 Difference]: Finished difference. Result has 90 places, 117 transitions, 857 flow [2024-06-14 11:46:55,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=763, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=857, PETRI_PLACES=90, PETRI_TRANSITIONS=117} [2024-06-14 11:46:55,868 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 45 predicate places. [2024-06-14 11:46:55,868 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 117 transitions, 857 flow [2024-06-14 11:46:55,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:46:55,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:46:55,869 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:46:55,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-14 11:46:55,869 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 11:46:55,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:46:55,869 INFO L85 PathProgramCache]: Analyzing trace with hash 1379583355, now seen corresponding path program 1 times [2024-06-14 11:46:55,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:46:55,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470410815] [2024-06-14 11:46:55,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:46:55,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:46:55,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:46:56,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:46:56,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:46:56,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470410815] [2024-06-14 11:46:56,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470410815] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:46:56,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:46:56,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:46:56,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605483972] [2024-06-14 11:46:56,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:46:56,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:46:56,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:46:56,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:46:56,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:46:56,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:46:56,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 117 transitions, 857 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:46:56,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:46:56,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:46:56,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:46:57,742 INFO L124 PetriNetUnfolderBase]: 2064/3126 cut-off events. [2024-06-14 11:46:57,743 INFO L125 PetriNetUnfolderBase]: For 39998/40005 co-relation queries the response was YES. [2024-06-14 11:46:57,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15190 conditions, 3126 events. 2064/3126 cut-off events. For 39998/40005 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 15382 event pairs, 640 based on Foata normal form. 8/3130 useless extension candidates. Maximal degree in co-relation 15152. Up to 2710 conditions per place. [2024-06-14 11:46:57,757 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 89 selfloop transitions, 65 changer transitions 0/159 dead transitions. [2024-06-14 11:46:57,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 159 transitions, 1403 flow [2024-06-14 11:46:57,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:46:57,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:46:57,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 167 transitions. [2024-06-14 11:46:57,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4744318181818182 [2024-06-14 11:46:57,758 INFO L175 Difference]: Start difference. First operand has 90 places, 117 transitions, 857 flow. Second operand 8 states and 167 transitions. [2024-06-14 11:46:57,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 159 transitions, 1403 flow [2024-06-14 11:46:57,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 159 transitions, 1333 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-14 11:46:57,778 INFO L231 Difference]: Finished difference. Result has 92 places, 123 transitions, 997 flow [2024-06-14 11:46:57,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=787, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=997, PETRI_PLACES=92, PETRI_TRANSITIONS=123} [2024-06-14 11:46:57,779 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 47 predicate places. [2024-06-14 11:46:57,779 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 123 transitions, 997 flow [2024-06-14 11:46:57,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:46:57,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:46:57,779 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:46:57,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-14 11:46:57,780 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 11:46:57,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:46:57,780 INFO L85 PathProgramCache]: Analyzing trace with hash -1514858549, now seen corresponding path program 2 times [2024-06-14 11:46:57,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:46:57,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455586071] [2024-06-14 11:46:57,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:46:57,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:46:57,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:46:58,614 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 11:46:58,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:46:58,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455586071] [2024-06-14 11:46:58,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455586071] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:46:58,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:46:58,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:46:58,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216393484] [2024-06-14 11:46:58,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:46:58,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:46:58,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:46:58,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:46:58,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:46:58,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:46:58,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 123 transitions, 997 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:46:58,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:46:58,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:46:58,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:46:59,385 INFO L124 PetriNetUnfolderBase]: 2075/3146 cut-off events. [2024-06-14 11:46:59,385 INFO L125 PetriNetUnfolderBase]: For 45327/45334 co-relation queries the response was YES. [2024-06-14 11:46:59,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16028 conditions, 3146 events. 2075/3146 cut-off events. For 45327/45334 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 15568 event pairs, 691 based on Foata normal form. 8/3150 useless extension candidates. Maximal degree in co-relation 15989. Up to 2827 conditions per place. [2024-06-14 11:46:59,403 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 96 selfloop transitions, 61 changer transitions 0/162 dead transitions. [2024-06-14 11:46:59,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 162 transitions, 1565 flow [2024-06-14 11:46:59,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:46:59,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:46:59,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-06-14 11:46:59,406 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4602272727272727 [2024-06-14 11:46:59,406 INFO L175 Difference]: Start difference. First operand has 92 places, 123 transitions, 997 flow. Second operand 8 states and 162 transitions. [2024-06-14 11:46:59,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 162 transitions, 1565 flow [2024-06-14 11:46:59,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 162 transitions, 1488 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-14 11:46:59,433 INFO L231 Difference]: Finished difference. Result has 96 places, 129 transitions, 1138 flow [2024-06-14 11:46:59,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=920, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1138, PETRI_PLACES=96, PETRI_TRANSITIONS=129} [2024-06-14 11:46:59,434 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 51 predicate places. [2024-06-14 11:46:59,434 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 129 transitions, 1138 flow [2024-06-14 11:46:59,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:46:59,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:46:59,434 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:46:59,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-14 11:46:59,435 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 11:46:59,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:46:59,435 INFO L85 PathProgramCache]: Analyzing trace with hash 1384224985, now seen corresponding path program 2 times [2024-06-14 11:46:59,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:46:59,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361453289] [2024-06-14 11:46:59,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:46:59,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:46:59,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:47:00,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:47:00,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:47:00,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361453289] [2024-06-14 11:47:00,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361453289] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:47:00,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:47:00,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:47:00,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821015645] [2024-06-14 11:47:00,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:47:00,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:47:00,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:47:00,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:47:00,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:47:00,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:47:00,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 129 transitions, 1138 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:00,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:47:00,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:47:00,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:47:01,155 INFO L124 PetriNetUnfolderBase]: 2129/3229 cut-off events. [2024-06-14 11:47:01,156 INFO L125 PetriNetUnfolderBase]: For 52452/52455 co-relation queries the response was YES. [2024-06-14 11:47:01,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17142 conditions, 3229 events. 2129/3229 cut-off events. For 52452/52455 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 16011 event pairs, 642 based on Foata normal form. 4/3229 useless extension candidates. Maximal degree in co-relation 17101. Up to 2772 conditions per place. [2024-06-14 11:47:01,177 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 100 selfloop transitions, 66 changer transitions 0/171 dead transitions. [2024-06-14 11:47:01,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 171 transitions, 1780 flow [2024-06-14 11:47:01,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:47:01,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:47:01,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 169 transitions. [2024-06-14 11:47:01,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48011363636363635 [2024-06-14 11:47:01,179 INFO L175 Difference]: Start difference. First operand has 96 places, 129 transitions, 1138 flow. Second operand 8 states and 169 transitions. [2024-06-14 11:47:01,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 171 transitions, 1780 flow [2024-06-14 11:47:01,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 171 transitions, 1699 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-14 11:47:01,215 INFO L231 Difference]: Finished difference. Result has 100 places, 135 transitions, 1263 flow [2024-06-14 11:47:01,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1057, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1263, PETRI_PLACES=100, PETRI_TRANSITIONS=135} [2024-06-14 11:47:01,216 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 55 predicate places. [2024-06-14 11:47:01,216 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 135 transitions, 1263 flow [2024-06-14 11:47:01,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:01,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:47:01,217 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:47:01,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-14 11:47:01,217 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 11:47:01,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:47:01,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1514678873, now seen corresponding path program 3 times [2024-06-14 11:47:01,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:47:01,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530606786] [2024-06-14 11:47:01,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:47:01,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:47:01,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:47:02,037 INFO 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 11:47:02,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:47:02,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530606786] [2024-06-14 11:47:02,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530606786] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:47:02,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:47:02,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:47:02,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137428475] [2024-06-14 11:47:02,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:47:02,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:47:02,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:47:02,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:47:02,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:47:02,122 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:47:02,122 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 135 transitions, 1263 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:02,122 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:47:02,122 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:47:02,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:47:02,821 INFO L124 PetriNetUnfolderBase]: 2119/3210 cut-off events. [2024-06-14 11:47:02,836 INFO L125 PetriNetUnfolderBase]: For 56666/56669 co-relation queries the response was YES. [2024-06-14 11:47:02,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17493 conditions, 3210 events. 2119/3210 cut-off events. For 56666/56669 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 15909 event pairs, 647 based on Foata normal form. 4/3210 useless extension candidates. Maximal degree in co-relation 17450. Up to 2764 conditions per place. [2024-06-14 11:47:02,870 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 93 selfloop transitions, 69 changer transitions 0/167 dead transitions. [2024-06-14 11:47:02,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 167 transitions, 1755 flow [2024-06-14 11:47:02,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:47:02,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:47:02,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 165 transitions. [2024-06-14 11:47:02,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46875 [2024-06-14 11:47:02,873 INFO L175 Difference]: Start difference. First operand has 100 places, 135 transitions, 1263 flow. Second operand 8 states and 165 transitions. [2024-06-14 11:47:02,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 167 transitions, 1755 flow [2024-06-14 11:47:02,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 167 transitions, 1637 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-14 11:47:02,912 INFO L231 Difference]: Finished difference. Result has 104 places, 135 transitions, 1291 flow [2024-06-14 11:47:02,912 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1145, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1291, PETRI_PLACES=104, PETRI_TRANSITIONS=135} [2024-06-14 11:47:02,912 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 59 predicate places. [2024-06-14 11:47:02,912 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 135 transitions, 1291 flow [2024-06-14 11:47:02,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:02,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:47:02,913 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:47:02,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-14 11:47:02,913 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 11:47:02,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:47:02,914 INFO L85 PathProgramCache]: Analyzing trace with hash -652243163, now seen corresponding path program 3 times [2024-06-14 11:47:02,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:47:02,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410390220] [2024-06-14 11:47:02,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:47:02,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:47:02,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:47:03,747 INFO 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 11:47:03,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:47:03,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410390220] [2024-06-14 11:47:03,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410390220] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:47:03,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:47:03,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:47:03,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694574259] [2024-06-14 11:47:03,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:47:03,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:47:03,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:47:03,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:47:03,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:47:03,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:47:03,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 135 transitions, 1291 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:03,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:47:03,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:47:03,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:47:04,698 INFO L124 PetriNetUnfolderBase]: 2130/3231 cut-off events. [2024-06-14 11:47:04,699 INFO L125 PetriNetUnfolderBase]: For 61641/61644 co-relation queries the response was YES. [2024-06-14 11:47:04,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17860 conditions, 3231 events. 2130/3231 cut-off events. For 61641/61644 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 16042 event pairs, 703 based on Foata normal form. 4/3231 useless extension candidates. Maximal degree in co-relation 17816. Up to 2903 conditions per place. [2024-06-14 11:47:04,723 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 102 selfloop transitions, 61 changer transitions 0/168 dead transitions. [2024-06-14 11:47:04,723 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 168 transitions, 1831 flow [2024-06-14 11:47:04,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:47:04,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:47:04,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-14 11:47:04,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-14 11:47:04,725 INFO L175 Difference]: Start difference. First operand has 104 places, 135 transitions, 1291 flow. Second operand 8 states and 160 transitions. [2024-06-14 11:47:04,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 168 transitions, 1831 flow [2024-06-14 11:47:04,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 168 transitions, 1678 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-14 11:47:04,766 INFO L231 Difference]: Finished difference. Result has 105 places, 138 transitions, 1310 flow [2024-06-14 11:47:04,766 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1138, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1310, PETRI_PLACES=105, PETRI_TRANSITIONS=138} [2024-06-14 11:47:04,767 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 60 predicate places. [2024-06-14 11:47:04,767 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 138 transitions, 1310 flow [2024-06-14 11:47:04,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:04,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:47:04,767 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:47:04,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-14 11:47:04,768 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 11:47:04,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:47:04,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1297525431, now seen corresponding path program 4 times [2024-06-14 11:47:04,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:47:04,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883552532] [2024-06-14 11:47:04,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:47:04,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:47:04,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:47:05,538 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 11:47:05,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:47:05,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883552532] [2024-06-14 11:47:05,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883552532] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:47:05,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:47:05,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:47:05,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882702380] [2024-06-14 11:47:05,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:47:05,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:47:05,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:47:05,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:47:05,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:47:05,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:47:05,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 138 transitions, 1310 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:05,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:47:05,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:47:05,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:47:06,329 INFO L124 PetriNetUnfolderBase]: 2152/3265 cut-off events. [2024-06-14 11:47:06,329 INFO L125 PetriNetUnfolderBase]: For 67484/67493 co-relation queries the response was YES. [2024-06-14 11:47:06,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18164 conditions, 3265 events. 2152/3265 cut-off events. For 67484/67493 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 16181 event pairs, 650 based on Foata normal form. 7/3261 useless extension candidates. Maximal degree in co-relation 18119. Up to 2799 conditions per place. [2024-06-14 11:47:06,360 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 88 selfloop transitions, 77 changer transitions 0/170 dead transitions. [2024-06-14 11:47:06,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 170 transitions, 1843 flow [2024-06-14 11:47:06,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:47:06,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:47:06,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-14 11:47:06,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-14 11:47:06,361 INFO L175 Difference]: Start difference. First operand has 105 places, 138 transitions, 1310 flow. Second operand 8 states and 160 transitions. [2024-06-14 11:47:06,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 170 transitions, 1843 flow [2024-06-14 11:47:06,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 170 transitions, 1725 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-14 11:47:06,420 INFO L231 Difference]: Finished difference. Result has 108 places, 141 transitions, 1389 flow [2024-06-14 11:47:06,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1192, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1389, PETRI_PLACES=108, PETRI_TRANSITIONS=141} [2024-06-14 11:47:06,420 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 63 predicate places. [2024-06-14 11:47:06,421 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 141 transitions, 1389 flow [2024-06-14 11:47:06,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:06,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:47:06,421 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:47:06,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-14 11:47:06,421 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 11:47:06,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:47:06,422 INFO L85 PathProgramCache]: Analyzing trace with hash -1150603789, now seen corresponding path program 5 times [2024-06-14 11:47:06,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:47:06,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859049816] [2024-06-14 11:47:06,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:47:06,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:47:06,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:47:07,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:47:07,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:47:07,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859049816] [2024-06-14 11:47:07,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859049816] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:47:07,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:47:07,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:47:07,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466680706] [2024-06-14 11:47:07,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:47:07,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:47:07,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:47:07,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:47:07,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:47:07,413 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:47:07,414 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 141 transitions, 1389 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:07,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:47:07,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:47:07,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:47:08,265 INFO L124 PetriNetUnfolderBase]: 2174/3302 cut-off events. [2024-06-14 11:47:08,265 INFO L125 PetriNetUnfolderBase]: For 73998/74007 co-relation queries the response was YES. [2024-06-14 11:47:08,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18707 conditions, 3302 events. 2174/3302 cut-off events. For 73998/74007 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 16421 event pairs, 645 based on Foata normal form. 7/3298 useless extension candidates. Maximal degree in co-relation 18661. Up to 2818 conditions per place. [2024-06-14 11:47:08,289 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 98 selfloop transitions, 72 changer transitions 0/175 dead transitions. [2024-06-14 11:47:08,290 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 175 transitions, 1950 flow [2024-06-14 11:47:08,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:47:08,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:47:08,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2024-06-14 11:47:08,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4630681818181818 [2024-06-14 11:47:08,291 INFO L175 Difference]: Start difference. First operand has 108 places, 141 transitions, 1389 flow. Second operand 8 states and 163 transitions. [2024-06-14 11:47:08,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 175 transitions, 1950 flow [2024-06-14 11:47:08,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 175 transitions, 1802 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-14 11:47:08,354 INFO L231 Difference]: Finished difference. Result has 111 places, 144 transitions, 1434 flow [2024-06-14 11:47:08,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1248, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1434, PETRI_PLACES=111, PETRI_TRANSITIONS=144} [2024-06-14 11:47:08,355 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 66 predicate places. [2024-06-14 11:47:08,355 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 144 transitions, 1434 flow [2024-06-14 11:47:08,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:08,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:47:08,356 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:47:08,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-14 11:47:08,356 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 11:47:08,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:47:08,356 INFO L85 PathProgramCache]: Analyzing trace with hash -1150610299, now seen corresponding path program 6 times [2024-06-14 11:47:08,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:47:08,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179535980] [2024-06-14 11:47:08,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:47:08,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:47:08,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:47:09,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:47:09,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:47:09,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179535980] [2024-06-14 11:47:09,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179535980] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:47:09,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:47:09,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:47:09,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131587127] [2024-06-14 11:47:09,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:47:09,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:47:09,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:47:09,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:47:09,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:47:09,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:47:09,526 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 144 transitions, 1434 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:09,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:47:09,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:47:09,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:47:10,238 INFO L124 PetriNetUnfolderBase]: 2164/3288 cut-off events. [2024-06-14 11:47:10,239 INFO L125 PetriNetUnfolderBase]: For 78768/78777 co-relation queries the response was YES. [2024-06-14 11:47:10,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18791 conditions, 3288 events. 2164/3288 cut-off events. For 78768/78777 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 16362 event pairs, 641 based on Foata normal form. 7/3284 useless extension candidates. Maximal degree in co-relation 18744. Up to 2810 conditions per place. [2024-06-14 11:47:10,261 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 96 selfloop transitions, 73 changer transitions 0/174 dead transitions. [2024-06-14 11:47:10,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 174 transitions, 1868 flow [2024-06-14 11:47:10,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:47:10,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:47:10,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-14 11:47:10,280 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-14 11:47:10,281 INFO L175 Difference]: Start difference. First operand has 111 places, 144 transitions, 1434 flow. Second operand 8 states and 160 transitions. [2024-06-14 11:47:10,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 174 transitions, 1868 flow [2024-06-14 11:47:10,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 174 transitions, 1636 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-14 11:47:10,400 INFO L231 Difference]: Finished difference. Result has 112 places, 144 transitions, 1358 flow [2024-06-14 11:47:10,400 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1202, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1358, PETRI_PLACES=112, PETRI_TRANSITIONS=144} [2024-06-14 11:47:10,400 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 67 predicate places. [2024-06-14 11:47:10,400 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 144 transitions, 1358 flow [2024-06-14 11:47:10,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:10,401 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:47:10,401 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:47:10,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-14 11:47:10,401 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 11:47:10,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:47:10,402 INFO L85 PathProgramCache]: Analyzing trace with hash -1150610485, now seen corresponding path program 4 times [2024-06-14 11:47:10,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:47:10,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049549391] [2024-06-14 11:47:10,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:47:10,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:47:10,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:47:11,298 INFO 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 11:47:11,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:47:11,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049549391] [2024-06-14 11:47:11,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049549391] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:47:11,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:47:11,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:47:11,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137629115] [2024-06-14 11:47:11,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:47:11,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:47:11,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:47:11,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:47:11,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:47:11,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:47:11,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 144 transitions, 1358 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:11,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:47:11,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:47:11,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:47:12,196 INFO L124 PetriNetUnfolderBase]: 2159/3280 cut-off events. [2024-06-14 11:47:12,196 INFO L125 PetriNetUnfolderBase]: For 82668/82674 co-relation queries the response was YES. [2024-06-14 11:47:12,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18870 conditions, 3280 events. 2159/3280 cut-off events. For 82668/82674 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 16314 event pairs, 717 based on Foata normal form. 3/3269 useless extension candidates. Maximal degree in co-relation 18822. Up to 2948 conditions per place. [2024-06-14 11:47:12,225 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 102 selfloop transitions, 61 changer transitions 0/168 dead transitions. [2024-06-14 11:47:12,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 168 transitions, 1764 flow [2024-06-14 11:47:12,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:47:12,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:47:12,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-14 11:47:12,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4403409090909091 [2024-06-14 11:47:12,227 INFO L175 Difference]: Start difference. First operand has 112 places, 144 transitions, 1358 flow. Second operand 8 states and 155 transitions. [2024-06-14 11:47:12,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 168 transitions, 1764 flow [2024-06-14 11:47:12,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 168 transitions, 1551 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-14 11:47:12,292 INFO L231 Difference]: Finished difference. Result has 112 places, 144 transitions, 1277 flow [2024-06-14 11:47:12,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1145, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1277, PETRI_PLACES=112, PETRI_TRANSITIONS=144} [2024-06-14 11:47:12,293 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 67 predicate places. [2024-06-14 11:47:12,293 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 144 transitions, 1277 flow [2024-06-14 11:47:12,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:12,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:47:12,293 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:47:12,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-14 11:47:12,294 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:47:12,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:47:12,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1142021749, now seen corresponding path program 1 times [2024-06-14 11:47:12,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:47:12,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769045301] [2024-06-14 11:47:12,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:47:12,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:47:12,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:47:13,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:47:13,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:47:13,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769045301] [2024-06-14 11:47:13,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769045301] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:47:13,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:47:13,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:47:13,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511067260] [2024-06-14 11:47:13,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:47:13,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:47:13,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:47:13,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:47:13,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:47:13,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-14 11:47:13,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 144 transitions, 1277 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 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 11:47:13,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:47:13,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-14 11:47:13,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:47:14,387 INFO L124 PetriNetUnfolderBase]: 1767/2845 cut-off events. [2024-06-14 11:47:14,387 INFO L125 PetriNetUnfolderBase]: For 75962/75987 co-relation queries the response was YES. [2024-06-14 11:47:14,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16046 conditions, 2845 events. 1767/2845 cut-off events. For 75962/75987 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 15130 event pairs, 548 based on Foata normal form. 29/2843 useless extension candidates. Maximal degree in co-relation 15997. Up to 2543 conditions per place. [2024-06-14 11:47:14,415 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 141 selfloop transitions, 16 changer transitions 0/173 dead transitions. [2024-06-14 11:47:14,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 173 transitions, 1713 flow [2024-06-14 11:47:14,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:47:14,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:47:14,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2024-06-14 11:47:14,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4630681818181818 [2024-06-14 11:47:14,417 INFO L175 Difference]: Start difference. First operand has 112 places, 144 transitions, 1277 flow. Second operand 8 states and 163 transitions. [2024-06-14 11:47:14,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 173 transitions, 1713 flow [2024-06-14 11:47:14,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 173 transitions, 1529 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-14 11:47:14,499 INFO L231 Difference]: Finished difference. Result has 113 places, 149 transitions, 1192 flow [2024-06-14 11:47:14,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1093, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1192, PETRI_PLACES=113, PETRI_TRANSITIONS=149} [2024-06-14 11:47:14,500 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 68 predicate places. [2024-06-14 11:47:14,500 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 149 transitions, 1192 flow [2024-06-14 11:47:14,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 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 11:47:14,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:47:14,500 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:47:14,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-14 11:47:14,501 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 11:47:14,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:47:14,501 INFO L85 PathProgramCache]: Analyzing trace with hash -1035554129, now seen corresponding path program 1 times [2024-06-14 11:47:14,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:47:14,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480850482] [2024-06-14 11:47:14,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:47:14,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:47:14,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:47:15,600 INFO 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 11:47:15,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:47:15,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480850482] [2024-06-14 11:47:15,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480850482] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:47:15,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:47:15,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:47:15,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857204833] [2024-06-14 11:47:15,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:47:15,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:47:15,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:47:15,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:47:15,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:47:15,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 44 [2024-06-14 11:47:15,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 149 transitions, 1192 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:15,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:47:15,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 44 [2024-06-14 11:47:15,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:47:16,117 INFO L124 PetriNetUnfolderBase]: 1491/2567 cut-off events. [2024-06-14 11:47:16,118 INFO L125 PetriNetUnfolderBase]: For 78187/78205 co-relation queries the response was YES. [2024-06-14 11:47:16,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14779 conditions, 2567 events. 1491/2567 cut-off events. For 78187/78205 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 14668 event pairs, 532 based on Foata normal form. 20/2578 useless extension candidates. Maximal degree in co-relation 14728. Up to 2112 conditions per place. [2024-06-14 11:47:16,136 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 97 selfloop transitions, 11 changer transitions 0/162 dead transitions. [2024-06-14 11:47:16,136 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 162 transitions, 1462 flow [2024-06-14 11:47:16,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:47:16,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:47:16,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 129 transitions. [2024-06-14 11:47:16,137 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48863636363636365 [2024-06-14 11:47:16,137 INFO L175 Difference]: Start difference. First operand has 113 places, 149 transitions, 1192 flow. Second operand 6 states and 129 transitions. [2024-06-14 11:47:16,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 162 transitions, 1462 flow [2024-06-14 11:47:16,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 162 transitions, 1403 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-14 11:47:16,197 INFO L231 Difference]: Finished difference. Result has 114 places, 152 transitions, 1193 flow [2024-06-14 11:47:16,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1133, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1193, PETRI_PLACES=114, PETRI_TRANSITIONS=152} [2024-06-14 11:47:16,208 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 69 predicate places. [2024-06-14 11:47:16,208 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 152 transitions, 1193 flow [2024-06-14 11:47:16,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:16,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:47:16,209 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:47:16,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-14 11:47:16,209 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:47:16,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:47:16,210 INFO L85 PathProgramCache]: Analyzing trace with hash -186312124, now seen corresponding path program 1 times [2024-06-14 11:47:16,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:47:16,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659774198] [2024-06-14 11:47:16,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:47:16,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:47:16,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:47:17,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:47:17,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:47:17,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659774198] [2024-06-14 11:47:17,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659774198] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:47:17,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:47:17,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:47:17,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089399004] [2024-06-14 11:47:17,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:47:17,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:47:17,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:47:17,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:47:17,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:47:17,412 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:47:17,412 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 152 transitions, 1193 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:17,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:47:17,413 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:47:17,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:47:18,251 INFO L124 PetriNetUnfolderBase]: 2164/3296 cut-off events. [2024-06-14 11:47:18,251 INFO L125 PetriNetUnfolderBase]: For 99131/99135 co-relation queries the response was YES. [2024-06-14 11:47:18,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19655 conditions, 3296 events. 2164/3296 cut-off events. For 99131/99135 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 16458 event pairs, 656 based on Foata normal form. 8/3301 useless extension candidates. Maximal degree in co-relation 19603. Up to 3090 conditions per place. [2024-06-14 11:47:18,281 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 161 selfloop transitions, 27 changer transitions 0/193 dead transitions. [2024-06-14 11:47:18,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 193 transitions, 1739 flow [2024-06-14 11:47:18,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:47:18,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:47:18,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-14 11:47:18,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-14 11:47:18,283 INFO L175 Difference]: Start difference. First operand has 114 places, 152 transitions, 1193 flow. Second operand 9 states and 176 transitions. [2024-06-14 11:47:18,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 193 transitions, 1739 flow [2024-06-14 11:47:18,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 193 transitions, 1701 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-14 11:47:18,383 INFO L231 Difference]: Finished difference. Result has 119 places, 155 transitions, 1267 flow [2024-06-14 11:47:18,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1155, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1267, PETRI_PLACES=119, PETRI_TRANSITIONS=155} [2024-06-14 11:47:18,386 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 74 predicate places. [2024-06-14 11:47:18,386 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 155 transitions, 1267 flow [2024-06-14 11:47:18,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:18,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:47:18,387 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:47:18,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-14 11:47:18,387 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:47:18,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:47:18,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1816431542, now seen corresponding path program 2 times [2024-06-14 11:47:18,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:47:18,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153854963] [2024-06-14 11:47:18,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:47:18,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:47:18,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:47:19,502 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 11:47:19,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:47:19,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153854963] [2024-06-14 11:47:19,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153854963] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:47:19,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:47:19,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:47:19,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226834278] [2024-06-14 11:47:19,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:47:19,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:47:19,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:47:19,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:47:19,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:47:19,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:47:19,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 155 transitions, 1267 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:19,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:47:19,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:47:19,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:47:20,658 INFO L124 PetriNetUnfolderBase]: 2218/3395 cut-off events. [2024-06-14 11:47:20,658 INFO L125 PetriNetUnfolderBase]: For 108937/108944 co-relation queries the response was YES. [2024-06-14 11:47:20,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20872 conditions, 3395 events. 2218/3395 cut-off events. For 108937/108944 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 17239 event pairs, 596 based on Foata normal form. 8/3399 useless extension candidates. Maximal degree in co-relation 20819. Up to 2658 conditions per place. [2024-06-14 11:47:20,698 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 117 selfloop transitions, 86 changer transitions 0/208 dead transitions. [2024-06-14 11:47:20,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 208 transitions, 2183 flow [2024-06-14 11:47:20,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:47:20,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:47:20,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 192 transitions. [2024-06-14 11:47:20,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48484848484848486 [2024-06-14 11:47:20,700 INFO L175 Difference]: Start difference. First operand has 119 places, 155 transitions, 1267 flow. Second operand 9 states and 192 transitions. [2024-06-14 11:47:20,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 208 transitions, 2183 flow [2024-06-14 11:47:20,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 208 transitions, 2095 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-14 11:47:20,812 INFO L231 Difference]: Finished difference. Result has 121 places, 164 transitions, 1515 flow [2024-06-14 11:47:20,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1179, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1515, PETRI_PLACES=121, PETRI_TRANSITIONS=164} [2024-06-14 11:47:20,819 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 76 predicate places. [2024-06-14 11:47:20,819 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 164 transitions, 1515 flow [2024-06-14 11:47:20,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:20,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:47:20,820 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:47:20,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-14 11:47:20,820 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:47:20,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:47:20,821 INFO L85 PathProgramCache]: Analyzing trace with hash -182587474, now seen corresponding path program 3 times [2024-06-14 11:47:20,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:47:20,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255749136] [2024-06-14 11:47:20,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:47:20,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:47:20,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:47:21,993 INFO 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 11:47:21,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:47:21,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255749136] [2024-06-14 11:47:21,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255749136] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:47:21,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:47:21,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:47:21,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568176661] [2024-06-14 11:47:21,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:47:21,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:47:21,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:47:21,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:47:21,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:47:22,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:47:22,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 164 transitions, 1515 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:22,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:47:22,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:47:22,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:47:22,998 INFO L124 PetriNetUnfolderBase]: 2208/3381 cut-off events. [2024-06-14 11:47:22,999 INFO L125 PetriNetUnfolderBase]: For 116569/116576 co-relation queries the response was YES. [2024-06-14 11:47:23,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21407 conditions, 3381 events. 2208/3381 cut-off events. For 116569/116576 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 17109 event pairs, 596 based on Foata normal form. 8/3385 useless extension candidates. Maximal degree in co-relation 21353. Up to 2650 conditions per place. [2024-06-14 11:47:23,023 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 113 selfloop transitions, 87 changer transitions 0/205 dead transitions. [2024-06-14 11:47:23,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 205 transitions, 2163 flow [2024-06-14 11:47:23,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:47:23,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:47:23,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 188 transitions. [2024-06-14 11:47:23,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47474747474747475 [2024-06-14 11:47:23,025 INFO L175 Difference]: Start difference. First operand has 121 places, 164 transitions, 1515 flow. Second operand 9 states and 188 transitions. [2024-06-14 11:47:23,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 205 transitions, 2163 flow [2024-06-14 11:47:23,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 205 transitions, 2019 flow, removed 45 selfloop flow, removed 4 redundant places. [2024-06-14 11:47:23,110 INFO L231 Difference]: Finished difference. Result has 126 places, 164 transitions, 1553 flow [2024-06-14 11:47:23,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1371, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1553, PETRI_PLACES=126, PETRI_TRANSITIONS=164} [2024-06-14 11:47:23,111 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 81 predicate places. [2024-06-14 11:47:23,111 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 164 transitions, 1553 flow [2024-06-14 11:47:23,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:23,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:47:23,112 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:47:23,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-14 11:47:23,112 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:47:23,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:47:23,112 INFO L85 PathProgramCache]: Analyzing trace with hash -38696944, now seen corresponding path program 4 times [2024-06-14 11:47:23,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:47:23,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289869973] [2024-06-14 11:47:23,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:47:23,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:47:23,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:47:23,987 INFO 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 11:47:23,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:47:23,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289869973] [2024-06-14 11:47:23,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289869973] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:47:23,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:47:23,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:47:23,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105511835] [2024-06-14 11:47:23,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:47:23,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:47:23,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:47:23,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:47:23,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:47:24,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:47:24,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 164 transitions, 1553 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:24,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:47:24,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:47:24,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:47:24,972 INFO L124 PetriNetUnfolderBase]: 2294/3530 cut-off events. [2024-06-14 11:47:24,972 INFO L125 PetriNetUnfolderBase]: For 128267/128270 co-relation queries the response was YES. [2024-06-14 11:47:24,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22877 conditions, 3530 events. 2294/3530 cut-off events. For 128267/128270 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 18117 event pairs, 615 based on Foata normal form. 4/3530 useless extension candidates. Maximal degree in co-relation 22821. Up to 2723 conditions per place. [2024-06-14 11:47:24,998 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 121 selfloop transitions, 90 changer transitions 0/216 dead transitions. [2024-06-14 11:47:24,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 216 transitions, 2627 flow [2024-06-14 11:47:25,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:47:25,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:47:25,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 193 transitions. [2024-06-14 11:47:25,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48737373737373735 [2024-06-14 11:47:25,000 INFO L175 Difference]: Start difference. First operand has 126 places, 164 transitions, 1553 flow. Second operand 9 states and 193 transitions. [2024-06-14 11:47:25,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 216 transitions, 2627 flow [2024-06-14 11:47:25,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 216 transitions, 2425 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-14 11:47:25,067 INFO L231 Difference]: Finished difference. Result has 127 places, 173 transitions, 1707 flow [2024-06-14 11:47:25,068 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1369, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1707, PETRI_PLACES=127, PETRI_TRANSITIONS=173} [2024-06-14 11:47:25,068 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 82 predicate places. [2024-06-14 11:47:25,068 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 173 transitions, 1707 flow [2024-06-14 11:47:25,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:25,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:47:25,068 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:47:25,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-14 11:47:25,069 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:47:25,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:47:25,069 INFO L85 PathProgramCache]: Analyzing trace with hash 289389284, now seen corresponding path program 5 times [2024-06-14 11:47:25,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:47:25,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415913589] [2024-06-14 11:47:25,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:47:25,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:47:25,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:47:25,954 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 11:47:25,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:47:25,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415913589] [2024-06-14 11:47:25,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415913589] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:47:25,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:47:25,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:47:25,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507455158] [2024-06-14 11:47:25,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:47:25,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:47:25,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:47:25,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:47:25,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:47:26,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:47:26,054 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 173 transitions, 1707 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:26,054 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:47:26,054 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:47:26,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:47:27,065 INFO L124 PetriNetUnfolderBase]: 2284/3516 cut-off events. [2024-06-14 11:47:27,065 INFO L125 PetriNetUnfolderBase]: For 134004/134007 co-relation queries the response was YES. [2024-06-14 11:47:27,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22873 conditions, 3516 events. 2284/3516 cut-off events. For 134004/134007 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 18046 event pairs, 613 based on Foata normal form. 4/3516 useless extension candidates. Maximal degree in co-relation 22816. Up to 2715 conditions per place. [2024-06-14 11:47:27,092 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 118 selfloop transitions, 91 changer transitions 0/214 dead transitions. [2024-06-14 11:47:27,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 214 transitions, 2497 flow [2024-06-14 11:47:27,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:47:27,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:47:27,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 190 transitions. [2024-06-14 11:47:27,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4797979797979798 [2024-06-14 11:47:27,094 INFO L175 Difference]: Start difference. First operand has 127 places, 173 transitions, 1707 flow. Second operand 9 states and 190 transitions. [2024-06-14 11:47:27,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 214 transitions, 2497 flow [2024-06-14 11:47:27,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 214 transitions, 2311 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-14 11:47:27,192 INFO L231 Difference]: Finished difference. Result has 132 places, 173 transitions, 1711 flow [2024-06-14 11:47:27,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1521, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1711, PETRI_PLACES=132, PETRI_TRANSITIONS=173} [2024-06-14 11:47:27,193 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 87 predicate places. [2024-06-14 11:47:27,193 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 173 transitions, 1711 flow [2024-06-14 11:47:27,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:27,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:47:27,198 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:47:27,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-14 11:47:27,198 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:47:27,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:47:27,199 INFO L85 PathProgramCache]: Analyzing trace with hash -38495134, now seen corresponding path program 6 times [2024-06-14 11:47:27,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:47:27,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669832560] [2024-06-14 11:47:27,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:47:27,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:47:27,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:47:28,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:47:28,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:47:28,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669832560] [2024-06-14 11:47:28,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669832560] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:47:28,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:47:28,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:47:28,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172438353] [2024-06-14 11:47:28,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:47:28,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:47:28,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:47:28,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:47:28,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:47:28,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:47:28,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 173 transitions, 1711 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:28,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:47:28,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:47:28,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:47:29,259 INFO L124 PetriNetUnfolderBase]: 2274/3502 cut-off events. [2024-06-14 11:47:29,260 INFO L125 PetriNetUnfolderBase]: For 139656/139659 co-relation queries the response was YES. [2024-06-14 11:47:29,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22813 conditions, 3502 events. 2274/3502 cut-off events. For 139656/139659 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 17958 event pairs, 618 based on Foata normal form. 4/3502 useless extension candidates. Maximal degree in co-relation 22755. Up to 2707 conditions per place. [2024-06-14 11:47:29,286 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 110 selfloop transitions, 95 changer transitions 0/210 dead transitions. [2024-06-14 11:47:29,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 210 transitions, 2363 flow [2024-06-14 11:47:29,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:47:29,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:47:29,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 186 transitions. [2024-06-14 11:47:29,288 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4696969696969697 [2024-06-14 11:47:29,288 INFO L175 Difference]: Start difference. First operand has 132 places, 173 transitions, 1711 flow. Second operand 9 states and 186 transitions. [2024-06-14 11:47:29,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 210 transitions, 2363 flow [2024-06-14 11:47:29,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 210 transitions, 2151 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-14 11:47:29,380 INFO L231 Difference]: Finished difference. Result has 134 places, 173 transitions, 1697 flow [2024-06-14 11:47:29,381 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1499, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1697, PETRI_PLACES=134, PETRI_TRANSITIONS=173} [2024-06-14 11:47:29,381 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 89 predicate places. [2024-06-14 11:47:29,381 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 173 transitions, 1697 flow [2024-06-14 11:47:29,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:29,381 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:47:29,381 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:47:29,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-14 11:47:29,382 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 11:47:29,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:47:29,382 INFO L85 PathProgramCache]: Analyzing trace with hash -2050753664, now seen corresponding path program 1 times [2024-06-14 11:47:29,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:47:29,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015036525] [2024-06-14 11:47:29,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:47:29,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:47:29,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:47:30,163 INFO 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 11:47:30,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:47:30,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015036525] [2024-06-14 11:47:30,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015036525] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:47:30,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:47:30,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:47:30,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756213222] [2024-06-14 11:47:30,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:47:30,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:47:30,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:47:30,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:47:30,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:47:30,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-14 11:47:30,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 173 transitions, 1697 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:30,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:47:30,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-14 11:47:30,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:47:30,736 INFO L124 PetriNetUnfolderBase]: 1963/3165 cut-off events. [2024-06-14 11:47:30,736 INFO L125 PetriNetUnfolderBase]: For 144301/144305 co-relation queries the response was YES. [2024-06-14 11:47:30,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21305 conditions, 3165 events. 1963/3165 cut-off events. For 144301/144305 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 17253 event pairs, 614 based on Foata normal form. 5/3146 useless extension candidates. Maximal degree in co-relation 21246. Up to 2782 conditions per place. [2024-06-14 11:47:30,762 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 136 selfloop transitions, 13 changer transitions 0/192 dead transitions. [2024-06-14 11:47:30,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 192 transitions, 2075 flow [2024-06-14 11:47:30,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:47:30,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:47:30,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 124 transitions. [2024-06-14 11:47:30,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4696969696969697 [2024-06-14 11:47:30,764 INFO L175 Difference]: Start difference. First operand has 134 places, 173 transitions, 1697 flow. Second operand 6 states and 124 transitions. [2024-06-14 11:47:30,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 192 transitions, 2075 flow [2024-06-14 11:47:30,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 192 transitions, 1854 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-14 11:47:30,860 INFO L231 Difference]: Finished difference. Result has 131 places, 176 transitions, 1541 flow [2024-06-14 11:47:30,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1476, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1541, PETRI_PLACES=131, PETRI_TRANSITIONS=176} [2024-06-14 11:47:30,861 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 86 predicate places. [2024-06-14 11:47:30,861 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 176 transitions, 1541 flow [2024-06-14 11:47:30,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:30,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:47:30,861 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:47:30,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-14 11:47:30,862 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:47:30,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:47:30,862 INFO L85 PathProgramCache]: Analyzing trace with hash -1052477100, now seen corresponding path program 7 times [2024-06-14 11:47:30,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:47:30,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874285405] [2024-06-14 11:47:30,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:47:30,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:47:30,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:47:31,705 INFO 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 11:47:31,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:47:31,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874285405] [2024-06-14 11:47:31,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874285405] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:47:31,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:47:31,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:47:31,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18904275] [2024-06-14 11:47:31,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:47:31,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:47:31,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:47:31,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:47:31,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:47:31,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:47:31,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 176 transitions, 1541 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:31,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:47:31,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:47:31,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:47:32,659 INFO L124 PetriNetUnfolderBase]: 2301/3549 cut-off events. [2024-06-14 11:47:32,659 INFO L125 PetriNetUnfolderBase]: For 154216/154222 co-relation queries the response was YES. [2024-06-14 11:47:32,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23374 conditions, 3549 events. 2301/3549 cut-off events. For 154216/154222 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 18297 event pairs, 627 based on Foata normal form. 5/3540 useless extension candidates. Maximal degree in co-relation 23314. Up to 2733 conditions per place. [2024-06-14 11:47:32,687 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 104 selfloop transitions, 104 changer transitions 0/213 dead transitions. [2024-06-14 11:47:32,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 213 transitions, 2248 flow [2024-06-14 11:47:32,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:47:32,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:47:32,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 181 transitions. [2024-06-14 11:47:32,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45707070707070707 [2024-06-14 11:47:32,689 INFO L175 Difference]: Start difference. First operand has 131 places, 176 transitions, 1541 flow. Second operand 9 states and 181 transitions. [2024-06-14 11:47:32,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 213 transitions, 2248 flow [2024-06-14 11:47:32,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 213 transitions, 2207 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-14 11:47:32,776 INFO L231 Difference]: Finished difference. Result has 136 places, 179 transitions, 1769 flow [2024-06-14 11:47:32,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1500, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1769, PETRI_PLACES=136, PETRI_TRANSITIONS=179} [2024-06-14 11:47:32,776 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 91 predicate places. [2024-06-14 11:47:32,776 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 179 transitions, 1769 flow [2024-06-14 11:47:32,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:32,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:47:32,777 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:47:32,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-14 11:47:32,777 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:47:32,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:47:32,777 INFO L85 PathProgramCache]: Analyzing trace with hash -1308977610, now seen corresponding path program 8 times [2024-06-14 11:47:32,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:47:32,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306824997] [2024-06-14 11:47:32,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:47:32,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:47:32,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:47:33,629 INFO 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 11:47:33,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:47:33,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306824997] [2024-06-14 11:47:33,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306824997] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:47:33,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:47:33,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:47:33,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656242236] [2024-06-14 11:47:33,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:47:33,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:47:33,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:47:33,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:47:33,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:47:33,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:47:33,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 179 transitions, 1769 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:33,723 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:47:33,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:47:33,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:47:34,687 INFO L124 PetriNetUnfolderBase]: 2323/3591 cut-off events. [2024-06-14 11:47:34,688 INFO L125 PetriNetUnfolderBase]: For 164471/164477 co-relation queries the response was YES. [2024-06-14 11:47:34,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24278 conditions, 3591 events. 2323/3591 cut-off events. For 164471/164477 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 18576 event pairs, 632 based on Foata normal form. 5/3582 useless extension candidates. Maximal degree in co-relation 24217. Up to 2752 conditions per place. [2024-06-14 11:47:34,720 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 117 selfloop transitions, 96 changer transitions 0/218 dead transitions. [2024-06-14 11:47:34,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 218 transitions, 2506 flow [2024-06-14 11:47:34,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:47:34,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:47:34,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 185 transitions. [2024-06-14 11:47:34,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4671717171717172 [2024-06-14 11:47:34,722 INFO L175 Difference]: Start difference. First operand has 136 places, 179 transitions, 1769 flow. Second operand 9 states and 185 transitions. [2024-06-14 11:47:34,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 218 transitions, 2506 flow [2024-06-14 11:47:34,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 218 transitions, 2307 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-14 11:47:34,876 INFO L231 Difference]: Finished difference. Result has 139 places, 182 transitions, 1829 flow [2024-06-14 11:47:34,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1579, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1829, PETRI_PLACES=139, PETRI_TRANSITIONS=182} [2024-06-14 11:47:34,877 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 94 predicate places. [2024-06-14 11:47:34,877 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 182 transitions, 1829 flow [2024-06-14 11:47:34,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:34,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:47:34,878 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:47:34,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-14 11:47:34,878 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:47:34,878 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:47:34,878 INFO L85 PathProgramCache]: Analyzing trace with hash -1309179420, now seen corresponding path program 9 times [2024-06-14 11:47:34,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:47:34,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010861360] [2024-06-14 11:47:34,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:47:34,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:47:34,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:47:35,756 INFO 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 11:47:35,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:47:35,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010861360] [2024-06-14 11:47:35,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010861360] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:47:35,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:47:35,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:47:35,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912563149] [2024-06-14 11:47:35,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:47:35,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:47:35,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:47:35,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:47:35,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:47:35,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:47:35,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 182 transitions, 1829 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:35,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:47:35,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:47:35,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:47:36,912 INFO L124 PetriNetUnfolderBase]: 2345/3628 cut-off events. [2024-06-14 11:47:36,912 INFO L125 PetriNetUnfolderBase]: For 173762/173768 co-relation queries the response was YES. [2024-06-14 11:47:36,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24641 conditions, 3628 events. 2345/3628 cut-off events. For 173762/173768 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 18851 event pairs, 615 based on Foata normal form. 5/3619 useless extension candidates. Maximal degree in co-relation 24579. Up to 2771 conditions per place. [2024-06-14 11:47:36,944 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 117 selfloop transitions, 100 changer transitions 0/222 dead transitions. [2024-06-14 11:47:36,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 222 transitions, 2581 flow [2024-06-14 11:47:36,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:47:36,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:47:36,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 184 transitions. [2024-06-14 11:47:36,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46464646464646464 [2024-06-14 11:47:36,948 INFO L175 Difference]: Start difference. First operand has 139 places, 182 transitions, 1829 flow. Second operand 9 states and 184 transitions. [2024-06-14 11:47:36,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 222 transitions, 2581 flow [2024-06-14 11:47:37,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 222 transitions, 2264 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-14 11:47:37,090 INFO L231 Difference]: Finished difference. Result has 140 places, 185 transitions, 1776 flow [2024-06-14 11:47:37,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1521, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1776, PETRI_PLACES=140, PETRI_TRANSITIONS=185} [2024-06-14 11:47:37,090 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 95 predicate places. [2024-06-14 11:47:37,091 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 185 transitions, 1776 flow [2024-06-14 11:47:37,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:37,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:47:37,091 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:47:37,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-14 11:47:37,091 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:47:37,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:47:37,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1309185000, now seen corresponding path program 10 times [2024-06-14 11:47:37,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:47:37,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433409769] [2024-06-14 11:47:37,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:47:37,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:47:37,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:47:38,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:47:38,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:47:38,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433409769] [2024-06-14 11:47:38,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433409769] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:47:38,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:47:38,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:47:38,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659642900] [2024-06-14 11:47:38,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:47:38,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:47:38,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:47:38,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:47:38,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:47:38,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:47:38,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 185 transitions, 1776 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:38,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:47:38,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:47:38,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:47:39,264 INFO L124 PetriNetUnfolderBase]: 2335/3614 cut-off events. [2024-06-14 11:47:39,265 INFO L125 PetriNetUnfolderBase]: For 178338/178344 co-relation queries the response was YES. [2024-06-14 11:47:39,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24537 conditions, 3614 events. 2335/3614 cut-off events. For 178338/178344 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 18756 event pairs, 613 based on Foata normal form. 5/3605 useless extension candidates. Maximal degree in co-relation 24474. Up to 2763 conditions per place. [2024-06-14 11:47:39,295 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 113 selfloop transitions, 102 changer transitions 0/220 dead transitions. [2024-06-14 11:47:39,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 220 transitions, 2326 flow [2024-06-14 11:47:39,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:47:39,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:47:39,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 181 transitions. [2024-06-14 11:47:39,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45707070707070707 [2024-06-14 11:47:39,297 INFO L175 Difference]: Start difference. First operand has 140 places, 185 transitions, 1776 flow. Second operand 9 states and 181 transitions. [2024-06-14 11:47:39,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 220 transitions, 2326 flow [2024-06-14 11:47:39,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 220 transitions, 2005 flow, removed 30 selfloop flow, removed 8 redundant places. [2024-06-14 11:47:39,459 INFO L231 Difference]: Finished difference. Result has 141 places, 185 transitions, 1667 flow [2024-06-14 11:47:39,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1455, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1667, PETRI_PLACES=141, PETRI_TRANSITIONS=185} [2024-06-14 11:47:39,459 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 96 predicate places. [2024-06-14 11:47:39,460 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 185 transitions, 1667 flow [2024-06-14 11:47:39,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:39,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:47:39,460 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:47:39,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-14 11:47:39,460 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 11:47:39,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:47:39,461 INFO L85 PathProgramCache]: Analyzing trace with hash -2037421184, now seen corresponding path program 2 times [2024-06-14 11:47:39,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:47:39,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208089347] [2024-06-14 11:47:39,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:47:39,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:47:39,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:47:40,304 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 11:47:40,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:47:40,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208089347] [2024-06-14 11:47:40,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208089347] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:47:40,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:47:40,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:47:40,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633009705] [2024-06-14 11:47:40,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:47:40,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:47:40,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:47:40,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:47:40,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:47:40,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-14 11:47:40,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 185 transitions, 1667 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:40,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:47:40,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-14 11:47:40,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:47:40,917 INFO L124 PetriNetUnfolderBase]: 1991/3240 cut-off events. [2024-06-14 11:47:40,917 INFO L125 PetriNetUnfolderBase]: For 181464/181479 co-relation queries the response was YES. [2024-06-14 11:47:40,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22731 conditions, 3240 events. 1991/3240 cut-off events. For 181464/181479 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 17953 event pairs, 617 based on Foata normal form. 11/3223 useless extension candidates. Maximal degree in co-relation 22667. Up to 2824 conditions per place. [2024-06-14 11:47:40,952 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 138 selfloop transitions, 18 changer transitions 0/199 dead transitions. [2024-06-14 11:47:40,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 199 transitions, 2049 flow [2024-06-14 11:47:40,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:47:40,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:47:40,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 120 transitions. [2024-06-14 11:47:40,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-14 11:47:40,953 INFO L175 Difference]: Start difference. First operand has 141 places, 185 transitions, 1667 flow. Second operand 6 states and 120 transitions. [2024-06-14 11:47:40,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 199 transitions, 2049 flow [2024-06-14 11:47:41,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 199 transitions, 1835 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-14 11:47:41,089 INFO L231 Difference]: Finished difference. Result has 139 places, 188 transitions, 1533 flow [2024-06-14 11:47:41,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1453, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1533, PETRI_PLACES=139, PETRI_TRANSITIONS=188} [2024-06-14 11:47:41,090 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 94 predicate places. [2024-06-14 11:47:41,090 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 188 transitions, 1533 flow [2024-06-14 11:47:41,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:41,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:47:41,090 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:47:41,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-14 11:47:41,091 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 11:47:41,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:47:41,091 INFO L85 PathProgramCache]: Analyzing trace with hash -2044080480, now seen corresponding path program 1 times [2024-06-14 11:47:41,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:47:41,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211510679] [2024-06-14 11:47:41,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:47:41,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:47:41,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:47:41,908 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 11:47:41,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:47:41,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211510679] [2024-06-14 11:47:41,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211510679] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:47:41,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:47:41,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:47:41,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042589280] [2024-06-14 11:47:41,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:47:41,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:47:41,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:47:41,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:47:41,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:47:41,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-14 11:47:41,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 188 transitions, 1533 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:41,976 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:47:41,976 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-14 11:47:41,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:47:42,554 INFO L124 PetriNetUnfolderBase]: 1972/3210 cut-off events. [2024-06-14 11:47:42,554 INFO L125 PetriNetUnfolderBase]: For 163254/163279 co-relation queries the response was YES. [2024-06-14 11:47:42,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21269 conditions, 3210 events. 1972/3210 cut-off events. For 163254/163279 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 17660 event pairs, 568 based on Foata normal form. 26/3205 useless extension candidates. Maximal degree in co-relation 21204. Up to 2851 conditions per place. [2024-06-14 11:47:42,582 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 174 selfloop transitions, 11 changer transitions 0/203 dead transitions. [2024-06-14 11:47:42,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 203 transitions, 1973 flow [2024-06-14 11:47:42,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:47:42,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:47:42,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 121 transitions. [2024-06-14 11:47:42,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-14 11:47:42,583 INFO L175 Difference]: Start difference. First operand has 139 places, 188 transitions, 1533 flow. Second operand 6 states and 121 transitions. [2024-06-14 11:47:42,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 203 transitions, 1973 flow [2024-06-14 11:47:42,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 203 transitions, 1915 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-14 11:47:42,711 INFO L231 Difference]: Finished difference. Result has 141 places, 191 transitions, 1543 flow [2024-06-14 11:47:42,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1475, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1543, PETRI_PLACES=141, PETRI_TRANSITIONS=191} [2024-06-14 11:47:42,712 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 96 predicate places. [2024-06-14 11:47:42,712 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 191 transitions, 1543 flow [2024-06-14 11:47:42,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:42,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:47:42,712 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:47:42,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-14 11:47:42,713 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 11:47:42,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:47:42,713 INFO L85 PathProgramCache]: Analyzing trace with hash -814067672, now seen corresponding path program 2 times [2024-06-14 11:47:42,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:47:42,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465265498] [2024-06-14 11:47:42,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:47:42,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:47:42,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:47:43,646 INFO 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 11:47:43,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:47:43,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465265498] [2024-06-14 11:47:43,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465265498] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:47:43,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:47:43,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:47:43,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486200105] [2024-06-14 11:47:43,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:47:43,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:47:43,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:47:43,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:47:43,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:47:43,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-14 11:47:43,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 191 transitions, 1543 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:43,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:47:43,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-14 11:47:43,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:47:44,235 INFO L124 PetriNetUnfolderBase]: 1969/3207 cut-off events. [2024-06-14 11:47:44,236 INFO L125 PetriNetUnfolderBase]: For 169633/169661 co-relation queries the response was YES. [2024-06-14 11:47:44,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21651 conditions, 3207 events. 1969/3207 cut-off events. For 169633/169661 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 17676 event pairs, 572 based on Foata normal form. 28/3203 useless extension candidates. Maximal degree in co-relation 21585. Up to 2841 conditions per place. [2024-06-14 11:47:44,262 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 168 selfloop transitions, 18 changer transitions 0/204 dead transitions. [2024-06-14 11:47:44,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 204 transitions, 1991 flow [2024-06-14 11:47:44,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:47:44,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:47:44,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-14 11:47:44,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-14 11:47:44,263 INFO L175 Difference]: Start difference. First operand has 141 places, 191 transitions, 1543 flow. Second operand 7 states and 133 transitions. [2024-06-14 11:47:44,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 204 transitions, 1991 flow [2024-06-14 11:47:44,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 204 transitions, 1943 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-14 11:47:44,395 INFO L231 Difference]: Finished difference. Result has 145 places, 196 transitions, 1602 flow [2024-06-14 11:47:44,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1497, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1602, PETRI_PLACES=145, PETRI_TRANSITIONS=196} [2024-06-14 11:47:44,395 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 100 predicate places. [2024-06-14 11:47:44,396 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 196 transitions, 1602 flow [2024-06-14 11:47:44,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:44,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:47:44,396 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 11:47:44,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-14 11:47:44,396 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:47:44,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:47:44,397 INFO L85 PathProgramCache]: Analyzing trace with hash 210309410, now seen corresponding path program 1 times [2024-06-14 11:47:44,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:47:44,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106147753] [2024-06-14 11:47:44,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:47:44,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:47:44,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:47:45,427 INFO 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 11:47:45,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:47:45,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106147753] [2024-06-14 11:47:45,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106147753] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:47:45,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:47:45,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:47:45,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128693773] [2024-06-14 11:47:45,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:47:45,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:47:45,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:47:45,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:47:45,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:47:45,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:47:45,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 196 transitions, 1602 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:45,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:47:45,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:47:45,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:47:46,496 INFO L124 PetriNetUnfolderBase]: 2376/3678 cut-off events. [2024-06-14 11:47:46,497 INFO L125 PetriNetUnfolderBase]: For 213539/213543 co-relation queries the response was YES. [2024-06-14 11:47:46,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26273 conditions, 3678 events. 2376/3678 cut-off events. For 213539/213543 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 19137 event pairs, 491 based on Foata normal form. 8/3683 useless extension candidates. Maximal degree in co-relation 26205. Up to 3345 conditions per place. [2024-06-14 11:47:46,530 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 208 selfloop transitions, 31 changer transitions 0/244 dead transitions. [2024-06-14 11:47:46,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 244 transitions, 2468 flow [2024-06-14 11:47:46,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:47:46,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:47:46,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 195 transitions. [2024-06-14 11:47:46,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-06-14 11:47:46,532 INFO L175 Difference]: Start difference. First operand has 145 places, 196 transitions, 1602 flow. Second operand 10 states and 195 transitions. [2024-06-14 11:47:46,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 244 transitions, 2468 flow [2024-06-14 11:47:46,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 244 transitions, 2409 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-14 11:47:46,676 INFO L231 Difference]: Finished difference. Result has 152 places, 200 transitions, 1712 flow [2024-06-14 11:47:46,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1543, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1712, PETRI_PLACES=152, PETRI_TRANSITIONS=200} [2024-06-14 11:47:46,677 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 107 predicate places. [2024-06-14 11:47:46,677 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 200 transitions, 1712 flow [2024-06-14 11:47:46,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:46,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:47:46,677 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 11:47:46,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-14 11:47:46,678 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:47:46,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:47:46,678 INFO L85 PathProgramCache]: Analyzing trace with hash -1480711810, now seen corresponding path program 2 times [2024-06-14 11:47:46,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:47:46,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831210777] [2024-06-14 11:47:46,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:47:46,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:47:46,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:47:47,676 INFO 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 11:47:47,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:47:47,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831210777] [2024-06-14 11:47:47,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831210777] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:47:47,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:47:47,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:47:47,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651189211] [2024-06-14 11:47:47,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:47:47,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:47:47,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:47:47,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:47:47,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:47:47,775 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:47:47,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 200 transitions, 1712 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:47,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:47:47,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:47:47,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:47:48,763 INFO L124 PetriNetUnfolderBase]: 2368/3666 cut-off events. [2024-06-14 11:47:48,763 INFO L125 PetriNetUnfolderBase]: For 221735/221739 co-relation queries the response was YES. [2024-06-14 11:47:48,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26544 conditions, 3666 events. 2368/3666 cut-off events. For 221735/221739 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 19071 event pairs, 630 based on Foata normal form. 8/3671 useless extension candidates. Maximal degree in co-relation 26474. Up to 3392 conditions per place. [2024-06-14 11:47:48,807 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 205 selfloop transitions, 27 changer transitions 0/237 dead transitions. [2024-06-14 11:47:48,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 237 transitions, 2298 flow [2024-06-14 11:47:48,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:47:48,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:47:48,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-14 11:47:48,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44191919191919193 [2024-06-14 11:47:48,809 INFO L175 Difference]: Start difference. First operand has 152 places, 200 transitions, 1712 flow. Second operand 9 states and 175 transitions. [2024-06-14 11:47:48,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 237 transitions, 2298 flow [2024-06-14 11:47:49,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 237 transitions, 2178 flow, removed 43 selfloop flow, removed 6 redundant places. [2024-06-14 11:47:49,020 INFO L231 Difference]: Finished difference. Result has 155 places, 200 transitions, 1653 flow [2024-06-14 11:47:49,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1592, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1653, PETRI_PLACES=155, PETRI_TRANSITIONS=200} [2024-06-14 11:47:49,020 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 110 predicate places. [2024-06-14 11:47:49,020 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 200 transitions, 1653 flow [2024-06-14 11:47:49,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:49,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:47:49,021 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 11:47:49,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-14 11:47:49,021 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:47:49,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:47:49,021 INFO L85 PathProgramCache]: Analyzing trace with hash 474799692, now seen corresponding path program 3 times [2024-06-14 11:47:49,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:47:49,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146159458] [2024-06-14 11:47:49,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:47:49,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:47:49,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:47:50,011 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 11:47:50,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:47:50,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146159458] [2024-06-14 11:47:50,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146159458] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:47:50,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:47:50,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:47:50,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356324841] [2024-06-14 11:47:50,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:47:50,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:47:50,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:47:50,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:47:50,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:47:50,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:47:50,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 200 transitions, 1653 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:50,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:47:50,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:47:50,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:47:50,993 INFO L124 PetriNetUnfolderBase]: 2385/3694 cut-off events. [2024-06-14 11:47:50,993 INFO L125 PetriNetUnfolderBase]: For 232893/232900 co-relation queries the response was YES. [2024-06-14 11:47:51,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26829 conditions, 3694 events. 2385/3694 cut-off events. For 232893/232900 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 19253 event pairs, 636 based on Foata normal form. 10/3700 useless extension candidates. Maximal degree in co-relation 26757. Up to 3267 conditions per place. [2024-06-14 11:47:51,032 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 165 selfloop transitions, 67 changer transitions 0/237 dead transitions. [2024-06-14 11:47:51,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 237 transitions, 2285 flow [2024-06-14 11:47:51,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:47:51,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:47:51,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-14 11:47:51,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44696969696969696 [2024-06-14 11:47:51,034 INFO L175 Difference]: Start difference. First operand has 155 places, 200 transitions, 1653 flow. Second operand 9 states and 177 transitions. [2024-06-14 11:47:51,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 237 transitions, 2285 flow [2024-06-14 11:47:51,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 237 transitions, 2226 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-14 11:47:51,191 INFO L231 Difference]: Finished difference. Result has 156 places, 202 transitions, 1791 flow [2024-06-14 11:47:51,192 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1594, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1791, PETRI_PLACES=156, PETRI_TRANSITIONS=202} [2024-06-14 11:47:51,194 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 111 predicate places. [2024-06-14 11:47:51,194 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 202 transitions, 1791 flow [2024-06-14 11:47:51,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:51,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:47:51,195 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 11:47:51,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-14 11:47:51,195 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 11:47:51,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:47:51,195 INFO L85 PathProgramCache]: Analyzing trace with hash 850788956, now seen corresponding path program 1 times [2024-06-14 11:47:51,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:47:51,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359413192] [2024-06-14 11:47:51,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:47:51,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:47:51,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:47:52,002 INFO 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 11:47:52,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:47:52,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359413192] [2024-06-14 11:47:52,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359413192] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:47:52,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:47:52,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:47:52,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791549261] [2024-06-14 11:47:52,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:47:52,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:47:52,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:47:52,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:47:52,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:47:52,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-14 11:47:52,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 202 transitions, 1791 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:52,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:47:52,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-14 11:47:52,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:47:52,725 INFO L124 PetriNetUnfolderBase]: 2098/3394 cut-off events. [2024-06-14 11:47:52,725 INFO L125 PetriNetUnfolderBase]: For 241873/241881 co-relation queries the response was YES. [2024-06-14 11:47:52,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25747 conditions, 3394 events. 2098/3394 cut-off events. For 241873/241881 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 18733 event pairs, 600 based on Foata normal form. 4/3346 useless extension candidates. Maximal degree in co-relation 25674. Up to 2898 conditions per place. [2024-06-14 11:47:52,755 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 154 selfloop transitions, 34 changer transitions 0/236 dead transitions. [2024-06-14 11:47:52,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 236 transitions, 2411 flow [2024-06-14 11:47:52,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:47:52,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:47:52,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-14 11:47:52,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45170454545454547 [2024-06-14 11:47:52,757 INFO L175 Difference]: Start difference. First operand has 156 places, 202 transitions, 1791 flow. Second operand 8 states and 159 transitions. [2024-06-14 11:47:52,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 236 transitions, 2411 flow [2024-06-14 11:47:52,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 236 transitions, 2210 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-14 11:47:52,888 INFO L231 Difference]: Finished difference. Result has 159 places, 218 transitions, 1874 flow [2024-06-14 11:47:52,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1612, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1874, PETRI_PLACES=159, PETRI_TRANSITIONS=218} [2024-06-14 11:47:52,889 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 114 predicate places. [2024-06-14 11:47:52,889 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 218 transitions, 1874 flow [2024-06-14 11:47:52,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:52,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:47:52,889 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 11:47:52,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-14 11:47:52,889 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:47:52,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:47:52,890 INFO L85 PathProgramCache]: Analyzing trace with hash -1199781506, now seen corresponding path program 4 times [2024-06-14 11:47:52,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:47:52,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618215390] [2024-06-14 11:47:52,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:47:52,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:47:52,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:47:53,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:47:53,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:47:53,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618215390] [2024-06-14 11:47:53,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618215390] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:47:53,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:47:53,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:47:53,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110197154] [2024-06-14 11:47:53,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:47:53,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:47:53,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:47:53,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:47:53,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:47:53,884 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:47:53,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 218 transitions, 1874 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:53,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:47:53,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:47:53,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:47:54,839 INFO L124 PetriNetUnfolderBase]: 2445/3781 cut-off events. [2024-06-14 11:47:54,840 INFO L125 PetriNetUnfolderBase]: For 254967/254970 co-relation queries the response was YES. [2024-06-14 11:47:54,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28266 conditions, 3781 events. 2445/3781 cut-off events. For 254967/254970 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 19565 event pairs, 645 based on Foata normal form. 6/3783 useless extension candidates. Maximal degree in co-relation 28190. Up to 3322 conditions per place. [2024-06-14 11:47:54,874 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 172 selfloop transitions, 74 changer transitions 0/251 dead transitions. [2024-06-14 11:47:54,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 251 transitions, 2520 flow [2024-06-14 11:47:54,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:47:54,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:47:54,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-14 11:47:54,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44191919191919193 [2024-06-14 11:47:54,876 INFO L175 Difference]: Start difference. First operand has 159 places, 218 transitions, 1874 flow. Second operand 9 states and 175 transitions. [2024-06-14 11:47:54,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 251 transitions, 2520 flow [2024-06-14 11:47:55,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 251 transitions, 2457 flow, removed 19 selfloop flow, removed 2 redundant places. [2024-06-14 11:47:55,028 INFO L231 Difference]: Finished difference. Result has 166 places, 220 transitions, 2026 flow [2024-06-14 11:47:55,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1811, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2026, PETRI_PLACES=166, PETRI_TRANSITIONS=220} [2024-06-14 11:47:55,028 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 121 predicate places. [2024-06-14 11:47:55,029 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 220 transitions, 2026 flow [2024-06-14 11:47:55,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:55,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:47:55,029 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 11:47:55,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-14 11:47:55,029 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:47:55,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:47:55,030 INFO L85 PathProgramCache]: Analyzing trace with hash 647118954, now seen corresponding path program 1 times [2024-06-14 11:47:55,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:47:55,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580731581] [2024-06-14 11:47:55,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:47:55,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:47:55,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:47:56,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:47:56,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:47:56,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580731581] [2024-06-14 11:47:56,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580731581] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:47:56,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:47:56,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:47:56,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115010836] [2024-06-14 11:47:56,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:47:56,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:47:56,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:47:56,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:47:56,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:47:56,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:47:56,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 220 transitions, 2026 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:56,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:47:56,272 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:47:56,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:47:57,339 INFO L124 PetriNetUnfolderBase]: 2462/3806 cut-off events. [2024-06-14 11:47:57,339 INFO L125 PetriNetUnfolderBase]: For 268792/268799 co-relation queries the response was YES. [2024-06-14 11:47:57,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28988 conditions, 3806 events. 2462/3806 cut-off events. For 268792/268799 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 19775 event pairs, 591 based on Foata normal form. 8/3810 useless extension candidates. Maximal degree in co-relation 28910. Up to 3474 conditions per place. [2024-06-14 11:47:57,371 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 208 selfloop transitions, 45 changer transitions 0/258 dead transitions. [2024-06-14 11:47:57,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 258 transitions, 2711 flow [2024-06-14 11:47:57,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:47:57,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:47:57,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-14 11:47:57,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44191919191919193 [2024-06-14 11:47:57,373 INFO L175 Difference]: Start difference. First operand has 166 places, 220 transitions, 2026 flow. Second operand 9 states and 175 transitions. [2024-06-14 11:47:57,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 258 transitions, 2711 flow [2024-06-14 11:47:57,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 258 transitions, 2514 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-14 11:47:57,657 INFO L231 Difference]: Finished difference. Result has 169 places, 225 transitions, 2005 flow [2024-06-14 11:47:57,657 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1829, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2005, PETRI_PLACES=169, PETRI_TRANSITIONS=225} [2024-06-14 11:47:57,657 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 124 predicate places. [2024-06-14 11:47:57,657 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 225 transitions, 2005 flow [2024-06-14 11:47:57,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:57,658 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:47:57,658 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 11:47:57,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-14 11:47:57,658 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 11:47:57,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:47:57,658 INFO L85 PathProgramCache]: Analyzing trace with hash 851147440, now seen corresponding path program 1 times [2024-06-14 11:47:57,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:47:57,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735822053] [2024-06-14 11:47:57,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:47:57,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:47:57,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:47:58,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:47:58,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:47:58,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735822053] [2024-06-14 11:47:58,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735822053] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:47:58,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:47:58,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:47:58,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028461490] [2024-06-14 11:47:58,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:47:58,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:47:58,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:47:58,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:47:58,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:47:58,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-14 11:47:58,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 225 transitions, 2005 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:47:58,844 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:47:58,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-14 11:47:58,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:47:59,590 INFO L124 PetriNetUnfolderBase]: 2127/3436 cut-off events. [2024-06-14 11:47:59,590 INFO L125 PetriNetUnfolderBase]: For 271269/271281 co-relation queries the response was YES. [2024-06-14 11:47:59,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27184 conditions, 3436 events. 2127/3436 cut-off events. For 271269/271281 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 18871 event pairs, 571 based on Foata normal form. 5/3416 useless extension candidates. Maximal degree in co-relation 27104. Up to 2986 conditions per place. [2024-06-14 11:47:59,640 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 174 selfloop transitions, 21 changer transitions 0/244 dead transitions. [2024-06-14 11:47:59,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 244 transitions, 2486 flow [2024-06-14 11:47:59,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:47:59,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:47:59,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 140 transitions. [2024-06-14 11:47:59,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-14 11:47:59,642 INFO L175 Difference]: Start difference. First operand has 169 places, 225 transitions, 2005 flow. Second operand 7 states and 140 transitions. [2024-06-14 11:47:59,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 244 transitions, 2486 flow [2024-06-14 11:48:00,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 244 transitions, 2353 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-14 11:48:00,005 INFO L231 Difference]: Finished difference. Result has 170 places, 228 transitions, 1962 flow [2024-06-14 11:48:00,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1872, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1962, PETRI_PLACES=170, PETRI_TRANSITIONS=228} [2024-06-14 11:48:00,006 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 125 predicate places. [2024-06-14 11:48:00,006 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 228 transitions, 1962 flow [2024-06-14 11:48:00,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:00,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:48:00,007 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 11:48:00,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-14 11:48:00,007 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 11:48:00,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:48:00,008 INFO L85 PathProgramCache]: Analyzing trace with hash 584404934, now seen corresponding path program 2 times [2024-06-14 11:48:00,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:48:00,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334104937] [2024-06-14 11:48:00,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:48:00,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:48:00,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:48:00,947 INFO 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 11:48:00,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:48:00,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334104937] [2024-06-14 11:48:00,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334104937] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:48:00,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:48:00,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:48:00,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996404993] [2024-06-14 11:48:00,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:48:00,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:48:00,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:48:00,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:48:00,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:48:01,045 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-14 11:48:01,045 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 228 transitions, 1962 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:01,046 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:48:01,046 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-14 11:48:01,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:48:01,656 INFO L124 PetriNetUnfolderBase]: 2159/3476 cut-off events. [2024-06-14 11:48:01,656 INFO L125 PetriNetUnfolderBase]: For 284009/284020 co-relation queries the response was YES. [2024-06-14 11:48:01,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27857 conditions, 3476 events. 2159/3476 cut-off events. For 284009/284020 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 19029 event pairs, 579 based on Foata normal form. 4/3444 useless extension candidates. Maximal degree in co-relation 27776. Up to 2957 conditions per place. [2024-06-14 11:48:01,691 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 162 selfloop transitions, 39 changer transitions 0/250 dead transitions. [2024-06-14 11:48:01,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 250 transitions, 2608 flow [2024-06-14 11:48:01,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:48:01,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:48:01,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 143 transitions. [2024-06-14 11:48:01,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-14 11:48:01,693 INFO L175 Difference]: Start difference. First operand has 170 places, 228 transitions, 1962 flow. Second operand 7 states and 143 transitions. [2024-06-14 11:48:01,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 250 transitions, 2608 flow [2024-06-14 11:48:01,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 250 transitions, 2540 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-14 11:48:01,956 INFO L231 Difference]: Finished difference. Result has 172 places, 234 transitions, 2084 flow [2024-06-14 11:48:01,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1894, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2084, PETRI_PLACES=172, PETRI_TRANSITIONS=234} [2024-06-14 11:48:01,957 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 127 predicate places. [2024-06-14 11:48:01,957 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 234 transitions, 2084 flow [2024-06-14 11:48:01,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:01,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:48:01,958 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 11:48:01,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-14 11:48:01,958 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:48:01,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:48:01,958 INFO L85 PathProgramCache]: Analyzing trace with hash -1901235608, now seen corresponding path program 5 times [2024-06-14 11:48:01,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:48:01,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384778870] [2024-06-14 11:48:01,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:48:01,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:48:01,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:48:02,870 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 11:48:02,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:48:02,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384778870] [2024-06-14 11:48:02,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384778870] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:48:02,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:48:02,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:48:02,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615978011] [2024-06-14 11:48:02,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:48:02,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:48:02,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:48:02,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:48:02,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:48:02,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:48:02,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 234 transitions, 2084 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:02,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:48:02,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:48:02,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:48:03,900 INFO L124 PetriNetUnfolderBase]: 2485/3847 cut-off events. [2024-06-14 11:48:03,900 INFO L125 PetriNetUnfolderBase]: For 300867/300867 co-relation queries the response was YES. [2024-06-14 11:48:03,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30452 conditions, 3847 events. 2485/3847 cut-off events. For 300867/300867 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 19975 event pairs, 627 based on Foata normal form. 4/3835 useless extension candidates. Maximal degree in co-relation 30370. Up to 3380 conditions per place. [2024-06-14 11:48:03,939 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 186 selfloop transitions, 73 changer transitions 0/264 dead transitions. [2024-06-14 11:48:03,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 264 transitions, 2754 flow [2024-06-14 11:48:03,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:48:03,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:48:03,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-14 11:48:03,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43434343434343436 [2024-06-14 11:48:03,941 INFO L175 Difference]: Start difference. First operand has 172 places, 234 transitions, 2084 flow. Second operand 9 states and 172 transitions. [2024-06-14 11:48:03,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 264 transitions, 2754 flow [2024-06-14 11:48:04,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 264 transitions, 2676 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-14 11:48:04,222 INFO L231 Difference]: Finished difference. Result has 178 places, 236 transitions, 2225 flow [2024-06-14 11:48:04,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2006, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2225, PETRI_PLACES=178, PETRI_TRANSITIONS=236} [2024-06-14 11:48:04,223 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 133 predicate places. [2024-06-14 11:48:04,223 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 236 transitions, 2225 flow [2024-06-14 11:48:04,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:04,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:48:04,224 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 11:48:04,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-14 11:48:04,224 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:48:04,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:48:04,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1733196044, now seen corresponding path program 2 times [2024-06-14 11:48:04,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:48:04,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669053780] [2024-06-14 11:48:04,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:48:04,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:48:04,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:48:05,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:48:05,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:48:05,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669053780] [2024-06-14 11:48:05,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669053780] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:48:05,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:48:05,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:48:05,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972232730] [2024-06-14 11:48:05,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:48:05,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:48:05,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:48:05,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:48:05,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:48:05,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:48:05,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 236 transitions, 2225 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:05,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:48:05,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:48:05,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:48:06,500 INFO L124 PetriNetUnfolderBase]: 2513/3900 cut-off events. [2024-06-14 11:48:06,500 INFO L125 PetriNetUnfolderBase]: For 313796/313805 co-relation queries the response was YES. [2024-06-14 11:48:06,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31324 conditions, 3900 events. 2513/3900 cut-off events. For 313796/313805 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 20510 event pairs, 588 based on Foata normal form. 10/3903 useless extension candidates. Maximal degree in co-relation 31240. Up to 3544 conditions per place. [2024-06-14 11:48:06,542 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 219 selfloop transitions, 49 changer transitions 0/273 dead transitions. [2024-06-14 11:48:06,543 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 273 transitions, 2953 flow [2024-06-14 11:48:06,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:48:06,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:48:06,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-14 11:48:06,545 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-14 11:48:06,545 INFO L175 Difference]: Start difference. First operand has 178 places, 236 transitions, 2225 flow. Second operand 9 states and 171 transitions. [2024-06-14 11:48:06,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 273 transitions, 2953 flow [2024-06-14 11:48:06,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 273 transitions, 2752 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-14 11:48:06,949 INFO L231 Difference]: Finished difference. Result has 181 places, 242 transitions, 2226 flow [2024-06-14 11:48:06,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2024, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2226, PETRI_PLACES=181, PETRI_TRANSITIONS=242} [2024-06-14 11:48:06,949 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 136 predicate places. [2024-06-14 11:48:06,949 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 242 transitions, 2226 flow [2024-06-14 11:48:06,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:06,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:48:06,950 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 11:48:06,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-14 11:48:06,950 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:48:06,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:48:06,951 INFO L85 PathProgramCache]: Analyzing trace with hash -1923352470, now seen corresponding path program 3 times [2024-06-14 11:48:06,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:48:06,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64984794] [2024-06-14 11:48:06,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:48:06,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:48:06,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:48:08,088 INFO 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 11:48:08,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:48:08,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64984794] [2024-06-14 11:48:08,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64984794] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:48:08,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:48:08,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:48:08,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869409481] [2024-06-14 11:48:08,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:48:08,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:48:08,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:48:08,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:48:08,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:48:08,174 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:48:08,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 242 transitions, 2226 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:08,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:48:08,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:48:08,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:48:09,103 INFO L124 PetriNetUnfolderBase]: 2530/3918 cut-off events. [2024-06-14 11:48:09,104 INFO L125 PetriNetUnfolderBase]: For 327315/327324 co-relation queries the response was YES. [2024-06-14 11:48:09,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31956 conditions, 3918 events. 2530/3918 cut-off events. For 327315/327324 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 20489 event pairs, 588 based on Foata normal form. 10/3921 useless extension candidates. Maximal degree in co-relation 31870. Up to 3571 conditions per place. [2024-06-14 11:48:09,138 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 224 selfloop transitions, 49 changer transitions 0/278 dead transitions. [2024-06-14 11:48:09,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 278 transitions, 2967 flow [2024-06-14 11:48:09,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:48:09,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:48:09,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-14 11:48:09,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43434343434343436 [2024-06-14 11:48:09,140 INFO L175 Difference]: Start difference. First operand has 181 places, 242 transitions, 2226 flow. Second operand 9 states and 172 transitions. [2024-06-14 11:48:09,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 278 transitions, 2967 flow [2024-06-14 11:48:09,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 278 transitions, 2812 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-14 11:48:09,548 INFO L231 Difference]: Finished difference. Result has 185 places, 247 transitions, 2275 flow [2024-06-14 11:48:09,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2075, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2275, PETRI_PLACES=185, PETRI_TRANSITIONS=247} [2024-06-14 11:48:09,548 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 140 predicate places. [2024-06-14 11:48:09,548 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 247 transitions, 2275 flow [2024-06-14 11:48:09,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:09,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:48:09,549 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 11:48:09,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-14 11:48:09,549 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:48:09,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:48:09,549 INFO L85 PathProgramCache]: Analyzing trace with hash 2018295914, now seen corresponding path program 4 times [2024-06-14 11:48:09,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:48:09,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905835853] [2024-06-14 11:48:09,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:48:09,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:48:09,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:48:10,808 INFO 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 11:48:10,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:48:10,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905835853] [2024-06-14 11:48:10,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905835853] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:48:10,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:48:10,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:48:10,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395452465] [2024-06-14 11:48:10,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:48:10,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:48:10,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:48:10,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:48:10,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:48:10,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:48:10,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 247 transitions, 2275 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:10,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:48:10,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:48:10,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:48:11,942 INFO L124 PetriNetUnfolderBase]: 2547/3939 cut-off events. [2024-06-14 11:48:11,942 INFO L125 PetriNetUnfolderBase]: For 341299/341308 co-relation queries the response was YES. [2024-06-14 11:48:11,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32659 conditions, 3939 events. 2547/3939 cut-off events. For 341299/341308 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 20590 event pairs, 588 based on Foata normal form. 10/3942 useless extension candidates. Maximal degree in co-relation 32571. Up to 3598 conditions per place. [2024-06-14 11:48:11,982 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 221 selfloop transitions, 55 changer transitions 0/281 dead transitions. [2024-06-14 11:48:11,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 281 transitions, 3014 flow [2024-06-14 11:48:11,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:48:11,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:48:11,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-14 11:48:11,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4292929292929293 [2024-06-14 11:48:11,993 INFO L175 Difference]: Start difference. First operand has 185 places, 247 transitions, 2275 flow. Second operand 9 states and 170 transitions. [2024-06-14 11:48:11,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 281 transitions, 3014 flow [2024-06-14 11:48:12,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 281 transitions, 2853 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-14 11:48:12,321 INFO L231 Difference]: Finished difference. Result has 188 places, 251 transitions, 2321 flow [2024-06-14 11:48:12,321 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2118, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2321, PETRI_PLACES=188, PETRI_TRANSITIONS=251} [2024-06-14 11:48:12,321 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 143 predicate places. [2024-06-14 11:48:12,321 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 251 transitions, 2321 flow [2024-06-14 11:48:12,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:12,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:48:12,322 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 11:48:12,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-14 11:48:12,322 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:48:12,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:48:12,322 INFO L85 PathProgramCache]: Analyzing trace with hash 2028771434, now seen corresponding path program 5 times [2024-06-14 11:48:12,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:48:12,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113435587] [2024-06-14 11:48:12,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:48:12,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:48:12,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:48:13,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:48:13,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:48:13,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113435587] [2024-06-14 11:48:13,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113435587] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:48:13,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:48:13,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:48:13,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440024560] [2024-06-14 11:48:13,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:48:13,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:48:13,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:48:13,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:48:13,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:48:13,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:48:13,568 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 251 transitions, 2321 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:13,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:48:13,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:48:13,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:48:14,616 INFO L124 PetriNetUnfolderBase]: 2539/3927 cut-off events. [2024-06-14 11:48:14,617 INFO L125 PetriNetUnfolderBase]: For 348696/348705 co-relation queries the response was YES. [2024-06-14 11:48:14,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32622 conditions, 3927 events. 2539/3927 cut-off events. For 348696/348705 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 20512 event pairs, 545 based on Foata normal form. 10/3930 useless extension candidates. Maximal degree in co-relation 32533. Up to 3491 conditions per place. [2024-06-14 11:48:14,662 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 215 selfloop transitions, 64 changer transitions 0/284 dead transitions. [2024-06-14 11:48:14,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 284 transitions, 3052 flow [2024-06-14 11:48:14,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:48:14,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:48:14,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-14 11:48:14,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-14 11:48:14,663 INFO L175 Difference]: Start difference. First operand has 188 places, 251 transitions, 2321 flow. Second operand 9 states and 171 transitions. [2024-06-14 11:48:14,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 284 transitions, 3052 flow [2024-06-14 11:48:14,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 284 transitions, 2903 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-14 11:48:14,991 INFO L231 Difference]: Finished difference. Result has 192 places, 253 transitions, 2381 flow [2024-06-14 11:48:14,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2172, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2381, PETRI_PLACES=192, PETRI_TRANSITIONS=253} [2024-06-14 11:48:14,991 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 147 predicate places. [2024-06-14 11:48:14,992 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 253 transitions, 2381 flow [2024-06-14 11:48:14,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:14,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:48:14,992 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 11:48:14,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-14 11:48:14,992 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 11:48:14,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:48:14,993 INFO L85 PathProgramCache]: Analyzing trace with hash 1264929550, now seen corresponding path program 2 times [2024-06-14 11:48:14,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:48:14,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951983687] [2024-06-14 11:48:14,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:48:14,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:48:15,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:48:16,162 INFO 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 11:48:16,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:48:16,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951983687] [2024-06-14 11:48:16,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951983687] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:48:16,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:48:16,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:48:16,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527055174] [2024-06-14 11:48:16,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:48:16,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:48:16,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:48:16,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:48:16,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:48:16,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-14 11:48:16,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 253 transitions, 2381 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:16,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:48:16,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-14 11:48:16,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:48:16,953 INFO L124 PetriNetUnfolderBase]: 2194/3543 cut-off events. [2024-06-14 11:48:16,953 INFO L125 PetriNetUnfolderBase]: For 351515/351532 co-relation queries the response was YES. [2024-06-14 11:48:16,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30572 conditions, 3543 events. 2194/3543 cut-off events. For 351515/351532 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 19493 event pairs, 572 based on Foata normal form. 7/3507 useless extension candidates. Maximal degree in co-relation 30482. Up to 3076 conditions per place. [2024-06-14 11:48:16,992 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 191 selfloop transitions, 32 changer transitions 0/273 dead transitions. [2024-06-14 11:48:16,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 273 transitions, 3088 flow [2024-06-14 11:48:16,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:48:16,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:48:16,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-14 11:48:16,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44805194805194803 [2024-06-14 11:48:16,993 INFO L175 Difference]: Start difference. First operand has 192 places, 253 transitions, 2381 flow. Second operand 7 states and 138 transitions. [2024-06-14 11:48:16,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 273 transitions, 3088 flow [2024-06-14 11:48:17,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 273 transitions, 2897 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-14 11:48:17,305 INFO L231 Difference]: Finished difference. Result has 193 places, 261 transitions, 2393 flow [2024-06-14 11:48:17,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2190, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2393, PETRI_PLACES=193, PETRI_TRANSITIONS=261} [2024-06-14 11:48:17,306 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 148 predicate places. [2024-06-14 11:48:17,306 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 261 transitions, 2393 flow [2024-06-14 11:48:17,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:17,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:48:17,306 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 11:48:17,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-14 11:48:17,307 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 11:48:17,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:48:17,307 INFO L85 PathProgramCache]: Analyzing trace with hash 1264453886, now seen corresponding path program 3 times [2024-06-14 11:48:17,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:48:17,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126288684] [2024-06-14 11:48:17,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:48:17,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:48:17,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:48:18,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:48:18,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:48:18,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126288684] [2024-06-14 11:48:18,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126288684] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:48:18,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:48:18,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:48:18,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093881689] [2024-06-14 11:48:18,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:48:18,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:48:18,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:48:18,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:48:18,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:48:18,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-14 11:48:18,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 261 transitions, 2393 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:18,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:48:18,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-14 11:48:18,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:48:19,015 INFO L124 PetriNetUnfolderBase]: 2208/3550 cut-off events. [2024-06-14 11:48:19,015 INFO L125 PetriNetUnfolderBase]: For 361923/361925 co-relation queries the response was YES. [2024-06-14 11:48:19,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30748 conditions, 3550 events. 2208/3550 cut-off events. For 361923/361925 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 19422 event pairs, 581 based on Foata normal form. 3/3496 useless extension candidates. Maximal degree in co-relation 30656. Up to 3028 conditions per place. [2024-06-14 11:48:19,053 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 180 selfloop transitions, 45 changer transitions 0/275 dead transitions. [2024-06-14 11:48:19,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 275 transitions, 3043 flow [2024-06-14 11:48:19,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:48:19,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:48:19,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-14 11:48:19,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4512987012987013 [2024-06-14 11:48:19,054 INFO L175 Difference]: Start difference. First operand has 193 places, 261 transitions, 2393 flow. Second operand 7 states and 139 transitions. [2024-06-14 11:48:19,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 275 transitions, 3043 flow [2024-06-14 11:48:19,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 275 transitions, 2965 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-14 11:48:19,397 INFO L231 Difference]: Finished difference. Result has 197 places, 264 transitions, 2475 flow [2024-06-14 11:48:19,398 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2315, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2475, PETRI_PLACES=197, PETRI_TRANSITIONS=264} [2024-06-14 11:48:19,398 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 152 predicate places. [2024-06-14 11:48:19,398 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 264 transitions, 2475 flow [2024-06-14 11:48:19,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:19,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:48:19,398 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 11:48:19,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-14 11:48:19,399 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 11:48:19,399 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:48:19,399 INFO L85 PathProgramCache]: Analyzing trace with hash 1264454320, now seen corresponding path program 3 times [2024-06-14 11:48:19,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:48:19,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790111528] [2024-06-14 11:48:19,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:48:19,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:48:19,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:48:20,573 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 11:48:20,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:48:20,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790111528] [2024-06-14 11:48:20,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790111528] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:48:20,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:48:20,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:48:20,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687679945] [2024-06-14 11:48:20,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:48:20,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:48:20,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:48:20,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:48:20,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:48:20,668 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-14 11:48:20,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 264 transitions, 2475 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:20,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:48:20,669 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-14 11:48:20,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:48:21,286 INFO L124 PetriNetUnfolderBase]: 2188/3535 cut-off events. [2024-06-14 11:48:21,286 INFO L125 PetriNetUnfolderBase]: For 372525/372534 co-relation queries the response was YES. [2024-06-14 11:48:21,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31175 conditions, 3535 events. 2188/3535 cut-off events. For 372525/372534 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 19487 event pairs, 572 based on Foata normal form. 7/3500 useless extension candidates. Maximal degree in co-relation 31081. Up to 3078 conditions per place. [2024-06-14 11:48:21,324 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 199 selfloop transitions, 27 changer transitions 0/276 dead transitions. [2024-06-14 11:48:21,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 276 transitions, 2973 flow [2024-06-14 11:48:21,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:48:21,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:48:21,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-14 11:48:21,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42613636363636365 [2024-06-14 11:48:21,325 INFO L175 Difference]: Start difference. First operand has 197 places, 264 transitions, 2475 flow. Second operand 8 states and 150 transitions. [2024-06-14 11:48:21,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 276 transitions, 2973 flow [2024-06-14 11:48:21,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 276 transitions, 2803 flow, removed 42 selfloop flow, removed 5 redundant places. [2024-06-14 11:48:21,702 INFO L231 Difference]: Finished difference. Result has 201 places, 266 transitions, 2389 flow [2024-06-14 11:48:21,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2305, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2389, PETRI_PLACES=201, PETRI_TRANSITIONS=266} [2024-06-14 11:48:21,703 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 156 predicate places. [2024-06-14 11:48:21,703 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 266 transitions, 2389 flow [2024-06-14 11:48:21,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:21,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:48:21,704 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 11:48:21,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-14 11:48:21,704 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 11:48:21,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:48:21,704 INFO L85 PathProgramCache]: Analyzing trace with hash -404777158, now seen corresponding path program 4 times [2024-06-14 11:48:21,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:48:21,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949996159] [2024-06-14 11:48:21,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:48:21,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:48:21,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:48:22,433 INFO 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 11:48:22,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:48:22,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949996159] [2024-06-14 11:48:22,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949996159] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:48:22,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:48:22,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:48:22,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170348027] [2024-06-14 11:48:22,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:48:22,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:48:22,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:48:22,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:48:22,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:48:22,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-14 11:48:22,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 266 transitions, 2389 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:22,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:48:22,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-14 11:48:22,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:48:23,195 INFO L124 PetriNetUnfolderBase]: 2231/3605 cut-off events. [2024-06-14 11:48:23,195 INFO L125 PetriNetUnfolderBase]: For 386058/386062 co-relation queries the response was YES. [2024-06-14 11:48:23,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31627 conditions, 3605 events. 2231/3605 cut-off events. For 386058/386062 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 19957 event pairs, 565 based on Foata normal form. 6/3573 useless extension candidates. Maximal degree in co-relation 31531. Up to 3094 conditions per place. [2024-06-14 11:48:23,295 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 206 selfloop transitions, 51 changer transitions 0/307 dead transitions. [2024-06-14 11:48:23,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 307 transitions, 3158 flow [2024-06-14 11:48:23,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:48:23,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:48:23,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 166 transitions. [2024-06-14 11:48:23,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4715909090909091 [2024-06-14 11:48:23,297 INFO L175 Difference]: Start difference. First operand has 201 places, 266 transitions, 2389 flow. Second operand 8 states and 166 transitions. [2024-06-14 11:48:23,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 307 transitions, 3158 flow [2024-06-14 11:48:23,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 307 transitions, 3111 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-14 11:48:23,693 INFO L231 Difference]: Finished difference. Result has 206 places, 285 transitions, 2676 flow [2024-06-14 11:48:23,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2343, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2676, PETRI_PLACES=206, PETRI_TRANSITIONS=285} [2024-06-14 11:48:23,693 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 161 predicate places. [2024-06-14 11:48:23,694 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 285 transitions, 2676 flow [2024-06-14 11:48:23,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:23,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:48:23,694 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 11:48:23,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-14 11:48:23,694 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 11:48:23,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:48:23,695 INFO L85 PathProgramCache]: Analyzing trace with hash -1752185610, now seen corresponding path program 5 times [2024-06-14 11:48:23,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:48:23,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876018010] [2024-06-14 11:48:23,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:48:23,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:48:23,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:48:24,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:48:24,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:48:24,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876018010] [2024-06-14 11:48:24,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876018010] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:48:24,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:48:24,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:48:24,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525628715] [2024-06-14 11:48:24,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:48:24,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:48:24,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:48:24,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:48:24,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:48:24,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-14 11:48:24,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 285 transitions, 2676 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:24,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:48:24,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-14 11:48:24,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:48:25,246 INFO L124 PetriNetUnfolderBase]: 2252/3637 cut-off events. [2024-06-14 11:48:25,246 INFO L125 PetriNetUnfolderBase]: For 396230/396234 co-relation queries the response was YES. [2024-06-14 11:48:25,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32185 conditions, 3637 events. 2252/3637 cut-off events. For 396230/396234 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 20162 event pairs, 565 based on Foata normal form. 6/3605 useless extension candidates. Maximal degree in co-relation 32086. Up to 3118 conditions per place. [2024-06-14 11:48:25,285 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 210 selfloop transitions, 61 changer transitions 0/321 dead transitions. [2024-06-14 11:48:25,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 321 transitions, 3456 flow [2024-06-14 11:48:25,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:48:25,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:48:25,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 166 transitions. [2024-06-14 11:48:25,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4715909090909091 [2024-06-14 11:48:25,286 INFO L175 Difference]: Start difference. First operand has 206 places, 285 transitions, 2676 flow. Second operand 8 states and 166 transitions. [2024-06-14 11:48:25,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 321 transitions, 3456 flow [2024-06-14 11:48:25,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 321 transitions, 3280 flow, removed 53 selfloop flow, removed 5 redundant places. [2024-06-14 11:48:25,778 INFO L231 Difference]: Finished difference. Result has 210 places, 298 transitions, 2844 flow [2024-06-14 11:48:25,779 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2542, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2844, PETRI_PLACES=210, PETRI_TRANSITIONS=298} [2024-06-14 11:48:25,779 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 165 predicate places. [2024-06-14 11:48:25,779 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 298 transitions, 2844 flow [2024-06-14 11:48:25,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:25,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:48:25,780 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 11:48:25,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-14 11:48:25,780 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 11:48:25,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:48:25,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1057866197, now seen corresponding path program 1 times [2024-06-14 11:48:25,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:48:25,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038463680] [2024-06-14 11:48:25,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:48:25,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:48:25,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:48:26,561 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 11:48:26,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:48:26,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038463680] [2024-06-14 11:48:26,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038463680] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:48:26,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:48:26,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:48:26,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49334434] [2024-06-14 11:48:26,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:48:26,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:48:26,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:48:26,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:48:26,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:48:26,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-14 11:48:26,633 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 298 transitions, 2844 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:26,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:48:26,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-14 11:48:26,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:48:27,346 INFO L124 PetriNetUnfolderBase]: 2359/3790 cut-off events. [2024-06-14 11:48:27,346 INFO L125 PetriNetUnfolderBase]: For 413509/413526 co-relation queries the response was YES. [2024-06-14 11:48:27,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32915 conditions, 3790 events. 2359/3790 cut-off events. For 413509/413526 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 21028 event pairs, 561 based on Foata normal form. 19/3796 useless extension candidates. Maximal degree in co-relation 32816. Up to 3318 conditions per place. [2024-06-14 11:48:27,388 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 265 selfloop transitions, 16 changer transitions 0/317 dead transitions. [2024-06-14 11:48:27,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 317 transitions, 3520 flow [2024-06-14 11:48:27,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:48:27,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:48:27,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-14 11:48:27,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-14 11:48:27,389 INFO L175 Difference]: Start difference. First operand has 210 places, 298 transitions, 2844 flow. Second operand 8 states and 154 transitions. [2024-06-14 11:48:27,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 317 transitions, 3520 flow [2024-06-14 11:48:27,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 317 transitions, 3412 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-14 11:48:27,664 INFO L231 Difference]: Finished difference. Result has 212 places, 301 transitions, 2828 flow [2024-06-14 11:48:27,665 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2736, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2828, PETRI_PLACES=212, PETRI_TRANSITIONS=301} [2024-06-14 11:48:27,665 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 167 predicate places. [2024-06-14 11:48:27,665 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 301 transitions, 2828 flow [2024-06-14 11:48:27,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:27,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:48:27,666 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 11:48:27,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-14 11:48:27,666 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 11:48:27,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:48:27,667 INFO L85 PathProgramCache]: Analyzing trace with hash 1058015927, now seen corresponding path program 2 times [2024-06-14 11:48:27,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:48:27,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751541586] [2024-06-14 11:48:27,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:48:27,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:48:27,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:48:28,434 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 11:48:28,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:48:28,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751541586] [2024-06-14 11:48:28,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751541586] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:48:28,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:48:28,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:48:28,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729409433] [2024-06-14 11:48:28,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:48:28,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:48:28,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:48:28,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:48:28,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:48:28,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-14 11:48:28,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 301 transitions, 2828 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:28,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:48:28,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-14 11:48:28,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:48:29,250 INFO L124 PetriNetUnfolderBase]: 2369/3806 cut-off events. [2024-06-14 11:48:29,251 INFO L125 PetriNetUnfolderBase]: For 426233/426250 co-relation queries the response was YES. [2024-06-14 11:48:29,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33404 conditions, 3806 events. 2369/3806 cut-off events. For 426233/426250 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 21088 event pairs, 561 based on Foata normal form. 19/3812 useless extension candidates. Maximal degree in co-relation 33305. Up to 3323 conditions per place. [2024-06-14 11:48:29,294 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 262 selfloop transitions, 20 changer transitions 0/318 dead transitions. [2024-06-14 11:48:29,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 318 transitions, 3508 flow [2024-06-14 11:48:29,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:48:29,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:48:29,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 141 transitions. [2024-06-14 11:48:29,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4577922077922078 [2024-06-14 11:48:29,295 INFO L175 Difference]: Start difference. First operand has 212 places, 301 transitions, 2828 flow. Second operand 7 states and 141 transitions. [2024-06-14 11:48:29,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 318 transitions, 3508 flow [2024-06-14 11:48:29,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 318 transitions, 3431 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-14 11:48:29,807 INFO L231 Difference]: Finished difference. Result has 212 places, 304 transitions, 2857 flow [2024-06-14 11:48:29,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2751, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2857, PETRI_PLACES=212, PETRI_TRANSITIONS=304} [2024-06-14 11:48:29,807 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 167 predicate places. [2024-06-14 11:48:29,807 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 304 transitions, 2857 flow [2024-06-14 11:48:29,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:29,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:48:29,808 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 11:48:29,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-14 11:48:29,808 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 11:48:29,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:48:29,808 INFO L85 PathProgramCache]: Analyzing trace with hash 528143338, now seen corresponding path program 1 times [2024-06-14 11:48:29,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:48:29,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179779187] [2024-06-14 11:48:29,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:48:29,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:48:29,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:48:30,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:48:30,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:48:30,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179779187] [2024-06-14 11:48:30,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179779187] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:48:30,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:48:30,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:48:30,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365080551] [2024-06-14 11:48:30,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:48:30,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:48:30,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:48:30,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:48:30,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:48:30,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-14 11:48:30,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 304 transitions, 2857 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:30,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:48:30,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-14 11:48:30,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:48:31,643 INFO L124 PetriNetUnfolderBase]: 2379/3822 cut-off events. [2024-06-14 11:48:31,644 INFO L125 PetriNetUnfolderBase]: For 441649/441666 co-relation queries the response was YES. [2024-06-14 11:48:31,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33975 conditions, 3822 events. 2379/3822 cut-off events. For 441649/441666 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 21212 event pairs, 560 based on Foata normal form. 20/3829 useless extension candidates. Maximal degree in co-relation 33876. Up to 3352 conditions per place. [2024-06-14 11:48:31,754 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 269 selfloop transitions, 15 changer transitions 0/320 dead transitions. [2024-06-14 11:48:31,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 320 transitions, 3519 flow [2024-06-14 11:48:31,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:48:31,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:48:31,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-14 11:48:31,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44805194805194803 [2024-06-14 11:48:31,756 INFO L175 Difference]: Start difference. First operand has 212 places, 304 transitions, 2857 flow. Second operand 7 states and 138 transitions. [2024-06-14 11:48:31,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 320 transitions, 3519 flow [2024-06-14 11:48:32,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 320 transitions, 3435 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-14 11:48:32,237 INFO L231 Difference]: Finished difference. Result has 214 places, 307 transitions, 2865 flow [2024-06-14 11:48:32,237 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2773, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2865, PETRI_PLACES=214, PETRI_TRANSITIONS=307} [2024-06-14 11:48:32,238 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 169 predicate places. [2024-06-14 11:48:32,238 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 307 transitions, 2865 flow [2024-06-14 11:48:32,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:32,238 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:48:32,238 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 11:48:32,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-14 11:48:32,238 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 11:48:32,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:48:32,239 INFO L85 PathProgramCache]: Analyzing trace with hash 1264669584, now seen corresponding path program 2 times [2024-06-14 11:48:32,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:48:32,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434070373] [2024-06-14 11:48:32,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:48:32,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:48:32,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:48:33,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:48:33,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:48:33,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434070373] [2024-06-14 11:48:33,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434070373] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:48:33,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:48:33,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:48:33,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135728902] [2024-06-14 11:48:33,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:48:33,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:48:33,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:48:33,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:48:33,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:48:33,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-14 11:48:33,431 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 307 transitions, 2865 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:33,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:48:33,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-14 11:48:33,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:48:34,120 INFO L124 PetriNetUnfolderBase]: 2389/3839 cut-off events. [2024-06-14 11:48:34,121 INFO L125 PetriNetUnfolderBase]: For 454244/454264 co-relation queries the response was YES. [2024-06-14 11:48:34,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34518 conditions, 3839 events. 2389/3839 cut-off events. For 454244/454264 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 21364 event pairs, 564 based on Foata normal form. 22/3847 useless extension candidates. Maximal degree in co-relation 34418. Up to 3360 conditions per place. [2024-06-14 11:48:34,164 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 264 selfloop transitions, 20 changer transitions 0/320 dead transitions. [2024-06-14 11:48:34,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 320 transitions, 3519 flow [2024-06-14 11:48:34,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:48:34,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:48:34,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-14 11:48:34,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4448051948051948 [2024-06-14 11:48:34,166 INFO L175 Difference]: Start difference. First operand has 214 places, 307 transitions, 2865 flow. Second operand 7 states and 137 transitions. [2024-06-14 11:48:34,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 320 transitions, 3519 flow [2024-06-14 11:48:34,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 320 transitions, 3449 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-14 11:48:34,746 INFO L231 Difference]: Finished difference. Result has 216 places, 310 transitions, 2903 flow [2024-06-14 11:48:34,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2795, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2903, PETRI_PLACES=216, PETRI_TRANSITIONS=310} [2024-06-14 11:48:34,748 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 171 predicate places. [2024-06-14 11:48:34,749 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 310 transitions, 2903 flow [2024-06-14 11:48:34,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:34,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:48:34,749 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 11:48:34,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-14 11:48:34,749 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 11:48:34,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:48:34,750 INFO L85 PathProgramCache]: Analyzing trace with hash 1258722907, now seen corresponding path program 3 times [2024-06-14 11:48:34,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:48:34,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853146252] [2024-06-14 11:48:34,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:48:34,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:48:34,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:48:35,641 INFO 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 11:48:35,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:48:35,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853146252] [2024-06-14 11:48:35,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853146252] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:48:35,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:48:35,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:48:35,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289454558] [2024-06-14 11:48:35,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:48:35,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:48:35,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:48:35,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:48:35,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:48:35,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-14 11:48:35,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 310 transitions, 2903 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:35,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:48:35,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-14 11:48:35,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:48:36,469 INFO L124 PetriNetUnfolderBase]: 2391/3844 cut-off events. [2024-06-14 11:48:36,470 INFO L125 PetriNetUnfolderBase]: For 463093/463113 co-relation queries the response was YES. [2024-06-14 11:48:36,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34929 conditions, 3844 events. 2391/3844 cut-off events. For 463093/463113 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 21380 event pairs, 568 based on Foata normal form. 19/3849 useless extension candidates. Maximal degree in co-relation 34828. Up to 3342 conditions per place. [2024-06-14 11:48:36,515 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 261 selfloop transitions, 27 changer transitions 0/324 dead transitions. [2024-06-14 11:48:36,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 324 transitions, 3591 flow [2024-06-14 11:48:36,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:48:36,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:48:36,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 140 transitions. [2024-06-14 11:48:36,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-14 11:48:36,517 INFO L175 Difference]: Start difference. First operand has 216 places, 310 transitions, 2903 flow. Second operand 7 states and 140 transitions. [2024-06-14 11:48:36,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 324 transitions, 3591 flow [2024-06-14 11:48:37,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 324 transitions, 3505 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-14 11:48:37,138 INFO L231 Difference]: Finished difference. Result has 218 places, 313 transitions, 2947 flow [2024-06-14 11:48:37,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2817, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2947, PETRI_PLACES=218, PETRI_TRANSITIONS=313} [2024-06-14 11:48:37,138 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 173 predicate places. [2024-06-14 11:48:37,138 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 313 transitions, 2947 flow [2024-06-14 11:48:37,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:37,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:48:37,139 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 11:48:37,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-14 11:48:37,139 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 11:48:37,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:48:37,139 INFO L85 PathProgramCache]: Analyzing trace with hash 1264936494, now seen corresponding path program 3 times [2024-06-14 11:48:37,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:48:37,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490896412] [2024-06-14 11:48:37,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:48:37,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:48:37,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:48:38,356 INFO 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 11:48:38,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:48:38,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490896412] [2024-06-14 11:48:38,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490896412] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:48:38,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:48:38,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:48:38,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672741131] [2024-06-14 11:48:38,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:48:38,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:48:38,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:48:38,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:48:38,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:48:38,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-14 11:48:38,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 313 transitions, 2947 flow. Second operand has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:38,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:48:38,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-14 11:48:38,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:48:39,180 INFO L124 PetriNetUnfolderBase]: 2378/3823 cut-off events. [2024-06-14 11:48:39,180 INFO L125 PetriNetUnfolderBase]: For 471879/471899 co-relation queries the response was YES. [2024-06-14 11:48:39,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35051 conditions, 3823 events. 2378/3823 cut-off events. For 471879/471899 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 21263 event pairs, 557 based on Foata normal form. 22/3831 useless extension candidates. Maximal degree in co-relation 34949. Up to 3326 conditions per place. [2024-06-14 11:48:39,219 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 261 selfloop transitions, 30 changer transitions 0/327 dead transitions. [2024-06-14 11:48:39,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 327 transitions, 3625 flow [2024-06-14 11:48:39,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:48:39,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:48:39,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-14 11:48:39,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4512987012987013 [2024-06-14 11:48:39,220 INFO L175 Difference]: Start difference. First operand has 218 places, 313 transitions, 2947 flow. Second operand 7 states and 139 transitions. [2024-06-14 11:48:39,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 327 transitions, 3625 flow [2024-06-14 11:48:39,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 327 transitions, 3517 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-14 11:48:39,670 INFO L231 Difference]: Finished difference. Result has 220 places, 316 transitions, 2976 flow [2024-06-14 11:48:39,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2839, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2976, PETRI_PLACES=220, PETRI_TRANSITIONS=316} [2024-06-14 11:48:39,670 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 175 predicate places. [2024-06-14 11:48:39,671 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 316 transitions, 2976 flow [2024-06-14 11:48:39,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.875) internal successors, (111), 8 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:39,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:48:39,671 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:48:39,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-14 11:48:39,671 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:48:39,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:48:39,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1695509951, now seen corresponding path program 1 times [2024-06-14 11:48:39,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:48:39,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563641885] [2024-06-14 11:48:39,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:48:39,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:48:39,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:48:40,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:48:40,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:48:40,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563641885] [2024-06-14 11:48:40,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563641885] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:48:40,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:48:40,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 11:48:40,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824179191] [2024-06-14 11:48:40,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:48:40,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 11:48:40,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:48:40,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 11:48:40,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-14 11:48:40,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:48:40,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 316 transitions, 2976 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:40,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:48:40,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:48:40,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:48:42,226 INFO L124 PetriNetUnfolderBase]: 2727/4258 cut-off events. [2024-06-14 11:48:42,226 INFO L125 PetriNetUnfolderBase]: For 521879/521883 co-relation queries the response was YES. [2024-06-14 11:48:42,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38656 conditions, 4258 events. 2727/4258 cut-off events. For 521879/521883 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 23122 event pairs, 584 based on Foata normal form. 24/4279 useless extension candidates. Maximal degree in co-relation 38553. Up to 3763 conditions per place. [2024-06-14 11:48:42,273 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 298 selfloop transitions, 57 changer transitions 0/360 dead transitions. [2024-06-14 11:48:42,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 360 transitions, 3941 flow [2024-06-14 11:48:42,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:48:42,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:48:42,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-14 11:48:42,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44545454545454544 [2024-06-14 11:48:42,275 INFO L175 Difference]: Start difference. First operand has 220 places, 316 transitions, 2976 flow. Second operand 10 states and 196 transitions. [2024-06-14 11:48:42,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 360 transitions, 3941 flow [2024-06-14 11:48:42,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 360 transitions, 3828 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-14 11:48:42,706 INFO L231 Difference]: Finished difference. Result has 225 places, 317 transitions, 3036 flow [2024-06-14 11:48:42,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2863, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3036, PETRI_PLACES=225, PETRI_TRANSITIONS=317} [2024-06-14 11:48:42,706 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 180 predicate places. [2024-06-14 11:48:42,707 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 317 transitions, 3036 flow [2024-06-14 11:48:42,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:42,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:48:42,707 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 11:48:42,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-14 11:48:42,707 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:48:42,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:48:42,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1740136039, now seen corresponding path program 2 times [2024-06-14 11:48:42,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:48:42,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44882306] [2024-06-14 11:48:42,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:48:42,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:48:42,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:48:43,702 INFO 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 11:48:43,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:48:43,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44882306] [2024-06-14 11:48:43,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44882306] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:48:43,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:48:43,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 11:48:43,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855812130] [2024-06-14 11:48:43,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:48:43,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 11:48:43,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:48:43,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 11:48:43,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-14 11:48:43,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:48:43,912 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 317 transitions, 3036 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:43,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:48:43,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:48:43,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:48:45,051 INFO L124 PetriNetUnfolderBase]: 2785/4366 cut-off events. [2024-06-14 11:48:45,052 INFO L125 PetriNetUnfolderBase]: For 536004/536008 co-relation queries the response was YES. [2024-06-14 11:48:45,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39688 conditions, 4366 events. 2785/4366 cut-off events. For 536004/536008 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 23979 event pairs, 584 based on Foata normal form. 20/4383 useless extension candidates. Maximal degree in co-relation 39584. Up to 3751 conditions per place. [2024-06-14 11:48:45,102 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 301 selfloop transitions, 59 changer transitions 0/365 dead transitions. [2024-06-14 11:48:45,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 365 transitions, 4045 flow [2024-06-14 11:48:45,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:48:45,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:48:45,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 200 transitions. [2024-06-14 11:48:45,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-14 11:48:45,104 INFO L175 Difference]: Start difference. First operand has 225 places, 317 transitions, 3036 flow. Second operand 10 states and 200 transitions. [2024-06-14 11:48:45,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 365 transitions, 4045 flow [2024-06-14 11:48:45,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 365 transitions, 3902 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-14 11:48:45,433 INFO L231 Difference]: Finished difference. Result has 227 places, 318 transitions, 3071 flow [2024-06-14 11:48:45,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2893, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3071, PETRI_PLACES=227, PETRI_TRANSITIONS=318} [2024-06-14 11:48:45,434 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 182 predicate places. [2024-06-14 11:48:45,434 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 318 transitions, 3071 flow [2024-06-14 11:48:45,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:45,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:48:45,434 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 11:48:45,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-14 11:48:45,435 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:48:45,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:48:45,435 INFO L85 PathProgramCache]: Analyzing trace with hash -1828701799, now seen corresponding path program 3 times [2024-06-14 11:48:45,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:48:45,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105807964] [2024-06-14 11:48:45,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:48:45,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:48:45,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:48:46,290 INFO 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 11:48:46,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:48:46,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105807964] [2024-06-14 11:48:46,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105807964] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:48:46,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:48:46,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 11:48:46,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677099006] [2024-06-14 11:48:46,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:48:46,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 11:48:46,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:48:46,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 11:48:46,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-14 11:48:46,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:48:46,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 318 transitions, 3071 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:46,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:48:46,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:48:46,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:48:47,530 INFO L124 PetriNetUnfolderBase]: 2843/4464 cut-off events. [2024-06-14 11:48:47,530 INFO L125 PetriNetUnfolderBase]: For 551453/551457 co-relation queries the response was YES. [2024-06-14 11:48:47,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40460 conditions, 4464 events. 2843/4464 cut-off events. For 551453/551457 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 24626 event pairs, 495 based on Foata normal form. 20/4481 useless extension candidates. Maximal degree in co-relation 40355. Up to 3683 conditions per place. [2024-06-14 11:48:47,583 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 303 selfloop transitions, 63 changer transitions 0/371 dead transitions. [2024-06-14 11:48:47,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 371 transitions, 4112 flow [2024-06-14 11:48:47,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 11:48:47,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 11:48:47,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 218 transitions. [2024-06-14 11:48:47,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45041322314049587 [2024-06-14 11:48:47,585 INFO L175 Difference]: Start difference. First operand has 227 places, 318 transitions, 3071 flow. Second operand 11 states and 218 transitions. [2024-06-14 11:48:47,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 371 transitions, 4112 flow [2024-06-14 11:48:48,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 371 transitions, 3956 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-06-14 11:48:48,021 INFO L231 Difference]: Finished difference. Result has 230 places, 319 transitions, 3103 flow [2024-06-14 11:48:48,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2915, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3103, PETRI_PLACES=230, PETRI_TRANSITIONS=319} [2024-06-14 11:48:48,022 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 185 predicate places. [2024-06-14 11:48:48,022 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 319 transitions, 3103 flow [2024-06-14 11:48:48,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:48,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:48:48,023 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 11:48:48,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-14 11:48:48,023 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:48:48,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:48:48,023 INFO L85 PathProgramCache]: Analyzing trace with hash 1834038101, now seen corresponding path program 4 times [2024-06-14 11:48:48,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:48:48,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258304539] [2024-06-14 11:48:48,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:48:48,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:48:48,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:48:49,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:48:49,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:48:49,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258304539] [2024-06-14 11:48:49,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258304539] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:48:49,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:48:49,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 11:48:49,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062957366] [2024-06-14 11:48:49,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:48:49,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 11:48:49,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:48:49,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 11:48:49,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-06-14 11:48:49,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:48:49,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 319 transitions, 3103 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:49,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:48:49,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:48:49,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:48:50,362 INFO L124 PetriNetUnfolderBase]: 2918/4591 cut-off events. [2024-06-14 11:48:50,362 INFO L125 PetriNetUnfolderBase]: For 578450/578455 co-relation queries the response was YES. [2024-06-14 11:48:50,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41506 conditions, 4591 events. 2918/4591 cut-off events. For 578450/578455 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 25610 event pairs, 609 based on Foata normal form. 22/4609 useless extension candidates. Maximal degree in co-relation 41400. Up to 3487 conditions per place. [2024-06-14 11:48:50,415 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 219 selfloop transitions, 141 changer transitions 0/365 dead transitions. [2024-06-14 11:48:50,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 365 transitions, 4115 flow [2024-06-14 11:48:50,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:48:50,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:48:50,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 208 transitions. [2024-06-14 11:48:50,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4727272727272727 [2024-06-14 11:48:50,416 INFO L175 Difference]: Start difference. First operand has 230 places, 319 transitions, 3103 flow. Second operand 10 states and 208 transitions. [2024-06-14 11:48:50,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 365 transitions, 4115 flow [2024-06-14 11:48:51,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 365 transitions, 3949 flow, removed 21 selfloop flow, removed 9 redundant places. [2024-06-14 11:48:51,012 INFO L231 Difference]: Finished difference. Result has 231 places, 320 transitions, 3284 flow [2024-06-14 11:48:51,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2937, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3284, PETRI_PLACES=231, PETRI_TRANSITIONS=320} [2024-06-14 11:48:51,012 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 186 predicate places. [2024-06-14 11:48:51,013 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 320 transitions, 3284 flow [2024-06-14 11:48:51,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:51,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:48:51,013 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 11:48:51,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-14 11:48:51,013 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:48:51,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:48:51,014 INFO L85 PathProgramCache]: Analyzing trace with hash 1833890231, now seen corresponding path program 5 times [2024-06-14 11:48:51,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:48:51,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78148108] [2024-06-14 11:48:51,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:48:51,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:48:51,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:48:52,009 INFO 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 11:48:52,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:48:52,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78148108] [2024-06-14 11:48:52,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78148108] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:48:52,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:48:52,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 11:48:52,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115348190] [2024-06-14 11:48:52,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:48:52,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 11:48:52,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:48:52,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 11:48:52,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-14 11:48:52,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:48:52,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 320 transitions, 3284 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:52,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:48:52,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:48:52,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:48:53,577 INFO L124 PetriNetUnfolderBase]: 3087/4880 cut-off events. [2024-06-14 11:48:53,577 INFO L125 PetriNetUnfolderBase]: For 633643/633648 co-relation queries the response was YES. [2024-06-14 11:48:53,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45294 conditions, 4880 events. 3087/4880 cut-off events. For 633643/633648 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 27830 event pairs, 632 based on Foata normal form. 18/4894 useless extension candidates. Maximal degree in co-relation 45187. Up to 3490 conditions per place. [2024-06-14 11:48:53,624 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 223 selfloop transitions, 144 changer transitions 0/372 dead transitions. [2024-06-14 11:48:53,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 372 transitions, 4632 flow [2024-06-14 11:48:53,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:48:53,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:48:53,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 212 transitions. [2024-06-14 11:48:53,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4818181818181818 [2024-06-14 11:48:53,626 INFO L175 Difference]: Start difference. First operand has 231 places, 320 transitions, 3284 flow. Second operand 10 states and 212 transitions. [2024-06-14 11:48:53,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 372 transitions, 4632 flow [2024-06-14 11:48:54,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 372 transitions, 4315 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-06-14 11:48:54,245 INFO L231 Difference]: Finished difference. Result has 233 places, 322 transitions, 3379 flow [2024-06-14 11:48:54,245 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2967, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3379, PETRI_PLACES=233, PETRI_TRANSITIONS=322} [2024-06-14 11:48:54,247 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 188 predicate places. [2024-06-14 11:48:54,247 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 322 transitions, 3379 flow [2024-06-14 11:48:54,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:54,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:48:54,248 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 11:48:54,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-14 11:48:54,248 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:48:54,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:48:54,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1839400481, now seen corresponding path program 6 times [2024-06-14 11:48:54,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:48:54,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449884141] [2024-06-14 11:48:54,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:48:54,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:48:54,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:48:55,284 INFO 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 11:48:55,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:48:55,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449884141] [2024-06-14 11:48:55,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449884141] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:48:55,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:48:55,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 11:48:55,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888200276] [2024-06-14 11:48:55,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:48:55,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 11:48:55,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:48:55,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 11:48:55,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-06-14 11:48:55,399 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:48:55,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 322 transitions, 3379 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:55,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:48:55,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:48:55,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:48:56,788 INFO L124 PetriNetUnfolderBase]: 3051/4824 cut-off events. [2024-06-14 11:48:56,789 INFO L125 PetriNetUnfolderBase]: For 616283/616288 co-relation queries the response was YES. [2024-06-14 11:48:56,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43602 conditions, 4824 events. 3051/4824 cut-off events. For 616283/616288 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 27439 event pairs, 634 based on Foata normal form. 22/4842 useless extension candidates. Maximal degree in co-relation 43494. Up to 3710 conditions per place. [2024-06-14 11:48:56,840 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 219 selfloop transitions, 142 changer transitions 0/366 dead transitions. [2024-06-14 11:48:56,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 366 transitions, 4327 flow [2024-06-14 11:48:56,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:48:56,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:48:56,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 206 transitions. [2024-06-14 11:48:56,841 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4681818181818182 [2024-06-14 11:48:56,841 INFO L175 Difference]: Start difference. First operand has 233 places, 322 transitions, 3379 flow. Second operand 10 states and 206 transitions. [2024-06-14 11:48:56,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 366 transitions, 4327 flow [2024-06-14 11:48:57,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 366 transitions, 4069 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-06-14 11:48:57,400 INFO L231 Difference]: Finished difference. Result has 237 places, 322 transitions, 3412 flow [2024-06-14 11:48:57,401 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3121, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3412, PETRI_PLACES=237, PETRI_TRANSITIONS=322} [2024-06-14 11:48:57,401 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 192 predicate places. [2024-06-14 11:48:57,401 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 322 transitions, 3412 flow [2024-06-14 11:48:57,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:57,401 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:48:57,401 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 11:48:57,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-14 11:48:57,402 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:48:57,402 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:48:57,402 INFO L85 PathProgramCache]: Analyzing trace with hash 1839615962, now seen corresponding path program 1 times [2024-06-14 11:48:57,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:48:57,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703776986] [2024-06-14 11:48:57,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:48:57,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:48:57,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:48:58,614 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 11:48:58,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:48:58,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703776986] [2024-06-14 11:48:58,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703776986] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:48:58,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:48:58,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 11:48:58,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014208849] [2024-06-14 11:48:58,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:48:58,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 11:48:58,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:48:58,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 11:48:58,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-06-14 11:48:58,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:48:58,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 322 transitions, 3412 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:48:58,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:48:58,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:48:58,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:48:59,982 INFO L124 PetriNetUnfolderBase]: 3068/4837 cut-off events. [2024-06-14 11:48:59,982 INFO L125 PetriNetUnfolderBase]: For 593832/593839 co-relation queries the response was YES. [2024-06-14 11:49:00,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43743 conditions, 4837 events. 3068/4837 cut-off events. For 593832/593839 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 27344 event pairs, 639 based on Foata normal form. 8/4841 useless extension candidates. Maximal degree in co-relation 43633. Up to 4180 conditions per place. [2024-06-14 11:49:00,040 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 257 selfloop transitions, 104 changer transitions 0/366 dead transitions. [2024-06-14 11:49:00,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 366 transitions, 4395 flow [2024-06-14 11:49:00,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:49:00,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:49:00,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 198 transitions. [2024-06-14 11:49:00,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-14 11:49:00,041 INFO L175 Difference]: Start difference. First operand has 237 places, 322 transitions, 3412 flow. Second operand 10 states and 198 transitions. [2024-06-14 11:49:00,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 366 transitions, 4395 flow [2024-06-14 11:49:00,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 366 transitions, 4097 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-14 11:49:00,626 INFO L231 Difference]: Finished difference. Result has 239 places, 327 transitions, 3435 flow [2024-06-14 11:49:00,627 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3118, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3435, PETRI_PLACES=239, PETRI_TRANSITIONS=327} [2024-06-14 11:49:00,627 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 194 predicate places. [2024-06-14 11:49:00,627 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 327 transitions, 3435 flow [2024-06-14 11:49:00,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:49:00,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:49:00,628 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 11:49:00,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-14 11:49:00,628 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 11:49:00,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:49:00,628 INFO L85 PathProgramCache]: Analyzing trace with hash 930023671, now seen corresponding path program 1 times [2024-06-14 11:49:00,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:49:00,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253270570] [2024-06-14 11:49:00,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:49:00,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:49:00,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:49:01,399 INFO 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 11:49:01,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:49:01,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253270570] [2024-06-14 11:49:01,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253270570] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:49:01,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:49:01,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:49:01,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132155955] [2024-06-14 11:49:01,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:49:01,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:49:01,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:49:01,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:49:01,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:49:01,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:49:01,444 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 327 transitions, 3435 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:49:01,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:49:01,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:49:01,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:49:02,390 INFO L124 PetriNetUnfolderBase]: 3080/4895 cut-off events. [2024-06-14 11:49:02,390 INFO L125 PetriNetUnfolderBase]: For 602546/602552 co-relation queries the response was YES. [2024-06-14 11:49:02,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44406 conditions, 4895 events. 3080/4895 cut-off events. For 602546/602552 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 28070 event pairs, 697 based on Foata normal form. 5/4893 useless extension candidates. Maximal degree in co-relation 44294. Up to 4561 conditions per place. [2024-06-14 11:49:02,445 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 308 selfloop transitions, 36 changer transitions 0/349 dead transitions. [2024-06-14 11:49:02,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 349 transitions, 4304 flow [2024-06-14 11:49:02,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:49:02,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:49:02,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-14 11:49:02,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2024-06-14 11:49:02,447 INFO L175 Difference]: Start difference. First operand has 239 places, 327 transitions, 3435 flow. Second operand 8 states and 144 transitions. [2024-06-14 11:49:02,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 349 transitions, 4304 flow [2024-06-14 11:49:03,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 349 transitions, 4027 flow, removed 35 selfloop flow, removed 7 redundant places. [2024-06-14 11:49:03,128 INFO L231 Difference]: Finished difference. Result has 240 places, 333 transitions, 3364 flow [2024-06-14 11:49:03,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3162, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3364, PETRI_PLACES=240, PETRI_TRANSITIONS=333} [2024-06-14 11:49:03,129 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 195 predicate places. [2024-06-14 11:49:03,129 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 333 transitions, 3364 flow [2024-06-14 11:49:03,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:49:03,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:49:03,129 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 11:49:03,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-14 11:49:03,130 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 11:49:03,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:49:03,130 INFO L85 PathProgramCache]: Analyzing trace with hash -69065987, now seen corresponding path program 2 times [2024-06-14 11:49:03,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:49:03,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19947174] [2024-06-14 11:49:03,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:49:03,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:49:03,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:49:03,973 INFO 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 11:49:03,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:49:03,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19947174] [2024-06-14 11:49:03,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19947174] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:49:03,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:49:03,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:49:03,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345783151] [2024-06-14 11:49:03,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:49:03,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:49:03,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:49:03,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:49:03,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:49:04,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:49:04,039 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 333 transitions, 3364 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:49:04,039 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:49:04,039 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:49:04,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:49:05,061 INFO L124 PetriNetUnfolderBase]: 3093/4897 cut-off events. [2024-06-14 11:49:05,061 INFO L125 PetriNetUnfolderBase]: For 622285/622290 co-relation queries the response was YES. [2024-06-14 11:49:05,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44745 conditions, 4897 events. 3093/4897 cut-off events. For 622285/622290 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 27940 event pairs, 681 based on Foata normal form. 5/4898 useless extension candidates. Maximal degree in co-relation 44632. Up to 4561 conditions per place. [2024-06-14 11:49:05,111 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 308 selfloop transitions, 42 changer transitions 0/355 dead transitions. [2024-06-14 11:49:05,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 355 transitions, 4440 flow [2024-06-14 11:49:05,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:49:05,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:49:05,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-14 11:49:05,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-14 11:49:05,112 INFO L175 Difference]: Start difference. First operand has 240 places, 333 transitions, 3364 flow. Second operand 7 states and 132 transitions. [2024-06-14 11:49:05,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 355 transitions, 4440 flow [2024-06-14 11:49:05,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 355 transitions, 4310 flow, removed 38 selfloop flow, removed 5 redundant places. [2024-06-14 11:49:05,635 INFO L231 Difference]: Finished difference. Result has 242 places, 339 transitions, 3502 flow [2024-06-14 11:49:05,635 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3234, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3502, PETRI_PLACES=242, PETRI_TRANSITIONS=339} [2024-06-14 11:49:05,636 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 197 predicate places. [2024-06-14 11:49:05,636 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 339 transitions, 3502 flow [2024-06-14 11:49:05,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:49:05,636 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:49:05,636 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 11:49:05,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-14 11:49:05,636 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:49:05,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:49:05,637 INFO L85 PathProgramCache]: Analyzing trace with hash -1615720957, now seen corresponding path program 7 times [2024-06-14 11:49:05,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:49:05,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41859028] [2024-06-14 11:49:05,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:49:05,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:49:05,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:49:06,772 INFO 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 11:49:06,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:49:06,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41859028] [2024-06-14 11:49:06,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41859028] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:49:06,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:49:06,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 11:49:06,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720273559] [2024-06-14 11:49:06,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:49:06,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 11:49:06,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:49:06,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 11:49:06,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-06-14 11:49:06,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:49:06,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 339 transitions, 3502 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:49:06,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:49:06,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:49:06,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:49:08,286 INFO L124 PetriNetUnfolderBase]: 3168/5010 cut-off events. [2024-06-14 11:49:08,287 INFO L125 PetriNetUnfolderBase]: For 687755/687758 co-relation queries the response was YES. [2024-06-14 11:49:08,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46279 conditions, 5010 events. 3168/5010 cut-off events. For 687755/687758 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 28710 event pairs, 609 based on Foata normal form. 20/5026 useless extension candidates. Maximal degree in co-relation 46166. Up to 3889 conditions per place. [2024-06-14 11:49:08,343 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 243 selfloop transitions, 136 changer transitions 0/384 dead transitions. [2024-06-14 11:49:08,343 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 384 transitions, 4574 flow [2024-06-14 11:49:08,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:49:08,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:49:08,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 207 transitions. [2024-06-14 11:49:08,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47045454545454546 [2024-06-14 11:49:08,353 INFO L175 Difference]: Start difference. First operand has 242 places, 339 transitions, 3502 flow. Second operand 10 states and 207 transitions. [2024-06-14 11:49:08,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 384 transitions, 4574 flow [2024-06-14 11:49:08,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 384 transitions, 4448 flow, removed 46 selfloop flow, removed 3 redundant places. [2024-06-14 11:49:08,991 INFO L231 Difference]: Finished difference. Result has 249 places, 340 transitions, 3719 flow [2024-06-14 11:49:08,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3376, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3719, PETRI_PLACES=249, PETRI_TRANSITIONS=340} [2024-06-14 11:49:08,992 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 204 predicate places. [2024-06-14 11:49:08,992 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 340 transitions, 3719 flow [2024-06-14 11:49:08,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:49:08,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:49:08,992 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 11:49:08,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-14 11:49:08,993 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:49:08,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:49:08,993 INFO L85 PathProgramCache]: Analyzing trace with hash 1461628515, now seen corresponding path program 8 times [2024-06-14 11:49:08,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:49:08,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788367069] [2024-06-14 11:49:08,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:49:08,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:49:08,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:49:10,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:49:10,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:49:10,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788367069] [2024-06-14 11:49:10,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788367069] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:49:10,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:49:10,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 11:49:10,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840060767] [2024-06-14 11:49:10,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:49:10,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 11:49:10,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:49:10,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 11:49:10,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-06-14 11:49:10,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:49:10,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 340 transitions, 3719 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:49:10,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:49:10,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:49:10,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:49:11,658 INFO L124 PetriNetUnfolderBase]: 3243/5140 cut-off events. [2024-06-14 11:49:11,659 INFO L125 PetriNetUnfolderBase]: For 717989/717992 co-relation queries the response was YES. [2024-06-14 11:49:11,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48150 conditions, 5140 events. 3243/5140 cut-off events. For 717989/717992 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 29728 event pairs, 655 based on Foata normal form. 20/5156 useless extension candidates. Maximal degree in co-relation 48035. Up to 4014 conditions per place. [2024-06-14 11:49:11,721 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 243 selfloop transitions, 137 changer transitions 0/385 dead transitions. [2024-06-14 11:49:11,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 385 transitions, 4795 flow [2024-06-14 11:49:11,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:49:11,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:49:11,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 206 transitions. [2024-06-14 11:49:11,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4681818181818182 [2024-06-14 11:49:11,723 INFO L175 Difference]: Start difference. First operand has 249 places, 340 transitions, 3719 flow. Second operand 10 states and 206 transitions. [2024-06-14 11:49:11,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 385 transitions, 4795 flow [2024-06-14 11:49:12,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 385 transitions, 4482 flow, removed 22 selfloop flow, removed 8 redundant places. [2024-06-14 11:49:12,450 INFO L231 Difference]: Finished difference. Result has 251 places, 341 transitions, 3753 flow [2024-06-14 11:49:12,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3406, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3753, PETRI_PLACES=251, PETRI_TRANSITIONS=341} [2024-06-14 11:49:12,450 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 206 predicate places. [2024-06-14 11:49:12,450 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 341 transitions, 3753 flow [2024-06-14 11:49:12,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:49:12,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:49:12,451 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 11:49:12,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-14 11:49:12,451 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:49:12,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:49:12,451 INFO L85 PathProgramCache]: Analyzing trace with hash 1660930305, now seen corresponding path program 9 times [2024-06-14 11:49:12,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:49:12,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592547396] [2024-06-14 11:49:12,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:49:12,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:49:12,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:49:13,522 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 11:49:13,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:49:13,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592547396] [2024-06-14 11:49:13,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592547396] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:49:13,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:49:13,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 11:49:13,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464216493] [2024-06-14 11:49:13,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:49:13,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 11:49:13,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:49:13,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 11:49:13,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-06-14 11:49:13,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:49:13,647 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 341 transitions, 3753 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:49:13,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:49:13,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:49:13,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:49:15,172 INFO L124 PetriNetUnfolderBase]: 3318/5270 cut-off events. [2024-06-14 11:49:15,173 INFO L125 PetriNetUnfolderBase]: For 738170/738173 co-relation queries the response was YES. [2024-06-14 11:49:15,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49175 conditions, 5270 events. 3318/5270 cut-off events. For 738170/738173 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 30660 event pairs, 650 based on Foata normal form. 20/5286 useless extension candidates. Maximal degree in co-relation 49059. Up to 4139 conditions per place. [2024-06-14 11:49:15,236 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 238 selfloop transitions, 141 changer transitions 0/384 dead transitions. [2024-06-14 11:49:15,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 384 transitions, 4809 flow [2024-06-14 11:49:15,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:49:15,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:49:15,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 204 transitions. [2024-06-14 11:49:15,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4636363636363636 [2024-06-14 11:49:15,238 INFO L175 Difference]: Start difference. First operand has 251 places, 341 transitions, 3753 flow. Second operand 10 states and 204 transitions. [2024-06-14 11:49:15,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 384 transitions, 4809 flow [2024-06-14 11:49:16,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 384 transitions, 4492 flow, removed 23 selfloop flow, removed 8 redundant places. [2024-06-14 11:49:16,076 INFO L231 Difference]: Finished difference. Result has 253 places, 342 transitions, 3793 flow [2024-06-14 11:49:16,076 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3436, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3793, PETRI_PLACES=253, PETRI_TRANSITIONS=342} [2024-06-14 11:49:16,077 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 208 predicate places. [2024-06-14 11:49:16,077 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 342 transitions, 3793 flow [2024-06-14 11:49:16,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:49:16,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:49:16,077 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 11:49:16,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-14 11:49:16,078 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:49:16,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:49:16,078 INFO L85 PathProgramCache]: Analyzing trace with hash 1461480645, now seen corresponding path program 10 times [2024-06-14 11:49:16,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:49:16,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537417672] [2024-06-14 11:49:16,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:49:16,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:49:16,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:49:17,182 INFO 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 11:49:17,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:49:17,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537417672] [2024-06-14 11:49:17,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537417672] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:49:17,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:49:17,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 11:49:17,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644548250] [2024-06-14 11:49:17,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:49:17,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 11:49:17,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:49:17,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 11:49:17,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-14 11:49:17,288 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:49:17,289 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 342 transitions, 3793 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:49:17,289 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:49:17,289 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:49:17,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:49:18,781 INFO L124 PetriNetUnfolderBase]: 3376/5373 cut-off events. [2024-06-14 11:49:18,781 INFO L125 PetriNetUnfolderBase]: For 748348/748351 co-relation queries the response was YES. [2024-06-14 11:49:18,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49929 conditions, 5373 events. 3376/5373 cut-off events. For 748348/748351 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 31511 event pairs, 629 based on Foata normal form. 16/5385 useless extension candidates. Maximal degree in co-relation 49812. Up to 3887 conditions per place. [2024-06-14 11:49:18,880 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 244 selfloop transitions, 141 changer transitions 0/390 dead transitions. [2024-06-14 11:49:18,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 390 transitions, 4905 flow [2024-06-14 11:49:18,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:49:18,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:49:18,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 208 transitions. [2024-06-14 11:49:18,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4727272727272727 [2024-06-14 11:49:18,882 INFO L175 Difference]: Start difference. First operand has 253 places, 342 transitions, 3793 flow. Second operand 10 states and 208 transitions. [2024-06-14 11:49:18,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 390 transitions, 4905 flow [2024-06-14 11:49:19,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 390 transitions, 4578 flow, removed 24 selfloop flow, removed 8 redundant places. [2024-06-14 11:49:19,782 INFO L231 Difference]: Finished difference. Result has 255 places, 343 transitions, 3824 flow [2024-06-14 11:49:19,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3466, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3824, PETRI_PLACES=255, PETRI_TRANSITIONS=343} [2024-06-14 11:49:19,782 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 210 predicate places. [2024-06-14 11:49:19,783 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 343 transitions, 3824 flow [2024-06-14 11:49:19,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:49:19,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:49:19,783 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 11:49:19,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-14 11:49:19,783 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:49:19,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:49:19,783 INFO L85 PathProgramCache]: Analyzing trace with hash 1661145786, now seen corresponding path program 2 times [2024-06-14 11:49:19,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:49:19,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560402777] [2024-06-14 11:49:19,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:49:19,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:49:19,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:49:21,161 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 11:49:21,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:49:21,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560402777] [2024-06-14 11:49:21,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560402777] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:49:21,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:49:21,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 11:49:21,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797388506] [2024-06-14 11:49:21,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:49:21,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 11:49:21,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:49:21,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 11:49:21,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-06-14 11:49:21,284 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:49:21,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 343 transitions, 3824 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:49:21,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:49:21,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:49:21,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:49:22,863 INFO L124 PetriNetUnfolderBase]: 3404/5415 cut-off events. [2024-06-14 11:49:22,863 INFO L125 PetriNetUnfolderBase]: For 734989/734996 co-relation queries the response was YES. [2024-06-14 11:49:22,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50116 conditions, 5415 events. 3404/5415 cut-off events. For 734989/734996 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 31771 event pairs, 713 based on Foata normal form. 8/5419 useless extension candidates. Maximal degree in co-relation 49998. Up to 4719 conditions per place. [2024-06-14 11:49:22,962 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 277 selfloop transitions, 104 changer transitions 0/386 dead transitions. [2024-06-14 11:49:22,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 386 transitions, 4870 flow [2024-06-14 11:49:22,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:49:22,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:49:22,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 197 transitions. [2024-06-14 11:49:22,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44772727272727275 [2024-06-14 11:49:22,963 INFO L175 Difference]: Start difference. First operand has 255 places, 343 transitions, 3824 flow. Second operand 10 states and 197 transitions. [2024-06-14 11:49:22,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 386 transitions, 4870 flow [2024-06-14 11:49:23,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 386 transitions, 4528 flow, removed 28 selfloop flow, removed 8 redundant places. [2024-06-14 11:49:23,774 INFO L231 Difference]: Finished difference. Result has 258 places, 349 transitions, 3826 flow [2024-06-14 11:49:23,774 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3488, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3826, PETRI_PLACES=258, PETRI_TRANSITIONS=349} [2024-06-14 11:49:23,775 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 213 predicate places. [2024-06-14 11:49:23,775 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 349 transitions, 3826 flow [2024-06-14 11:49:23,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:49:23,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:49:23,775 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 11:49:23,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-14 11:49:23,776 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:49:23,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:49:23,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1467206376, now seen corresponding path program 3 times [2024-06-14 11:49:23,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:49:23,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656083188] [2024-06-14 11:49:23,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:49:23,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:49:23,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:49:24,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:49:24,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:49:24,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656083188] [2024-06-14 11:49:24,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656083188] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:49:24,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:49:24,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 11:49:24,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620878974] [2024-06-14 11:49:24,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:49:24,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 11:49:24,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:49:24,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 11:49:24,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-06-14 11:49:25,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:49:25,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 349 transitions, 3826 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:49:25,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:49:25,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:49:25,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:49:26,645 INFO L124 PetriNetUnfolderBase]: 3421/5477 cut-off events. [2024-06-14 11:49:26,645 INFO L125 PetriNetUnfolderBase]: For 747548/747555 co-relation queries the response was YES. [2024-06-14 11:49:26,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50460 conditions, 5477 events. 3421/5477 cut-off events. For 747548/747555 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 32526 event pairs, 731 based on Foata normal form. 8/5481 useless extension candidates. Maximal degree in co-relation 50340. Up to 4746 conditions per place. [2024-06-14 11:49:26,711 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 283 selfloop transitions, 103 changer transitions 0/391 dead transitions. [2024-06-14 11:49:26,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 391 transitions, 4877 flow [2024-06-14 11:49:26,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:49:26,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:49:26,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 198 transitions. [2024-06-14 11:49:26,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-14 11:49:26,713 INFO L175 Difference]: Start difference. First operand has 258 places, 349 transitions, 3826 flow. Second operand 10 states and 198 transitions. [2024-06-14 11:49:26,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 391 transitions, 4877 flow [2024-06-14 11:49:27,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 391 transitions, 4586 flow, removed 42 selfloop flow, removed 7 redundant places. [2024-06-14 11:49:27,468 INFO L231 Difference]: Finished difference. Result has 262 places, 354 transitions, 3874 flow [2024-06-14 11:49:27,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3539, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3874, PETRI_PLACES=262, PETRI_TRANSITIONS=354} [2024-06-14 11:49:27,468 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 217 predicate places. [2024-06-14 11:49:27,468 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 354 transitions, 3874 flow [2024-06-14 11:49:27,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:49:27,469 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:49:27,469 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 11:49:27,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-14 11:49:27,469 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:49:27,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:49:27,470 INFO L85 PathProgramCache]: Analyzing trace with hash 437348648, now seen corresponding path program 4 times [2024-06-14 11:49:27,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:49:27,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788703814] [2024-06-14 11:49:27,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:49:27,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:49:27,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:49:29,004 INFO 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 11:49:29,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:49:29,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788703814] [2024-06-14 11:49:29,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788703814] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:49:29,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:49:29,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 11:49:29,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571092611] [2024-06-14 11:49:29,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:49:29,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 11:49:29,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:49:29,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 11:49:29,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-14 11:49:29,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:49:29,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 354 transitions, 3874 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:49:29,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:49:29,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:49:29,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:49:30,775 INFO L124 PetriNetUnfolderBase]: 3438/5484 cut-off events. [2024-06-14 11:49:30,775 INFO L125 PetriNetUnfolderBase]: For 768515/768522 co-relation queries the response was YES. [2024-06-14 11:49:30,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51219 conditions, 5484 events. 3438/5484 cut-off events. For 768515/768522 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 32409 event pairs, 718 based on Foata normal form. 8/5488 useless extension candidates. Maximal degree in co-relation 51097. Up to 4773 conditions per place. [2024-06-14 11:49:30,873 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 279 selfloop transitions, 110 changer transitions 0/394 dead transitions. [2024-06-14 11:49:30,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 394 transitions, 4917 flow [2024-06-14 11:49:30,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:49:30,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:49:30,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-14 11:49:30,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44545454545454544 [2024-06-14 11:49:30,875 INFO L175 Difference]: Start difference. First operand has 262 places, 354 transitions, 3874 flow. Second operand 10 states and 196 transitions. [2024-06-14 11:49:30,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 394 transitions, 4917 flow [2024-06-14 11:49:31,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 394 transitions, 4622 flow, removed 45 selfloop flow, removed 7 redundant places. [2024-06-14 11:49:31,954 INFO L231 Difference]: Finished difference. Result has 265 places, 358 transitions, 3916 flow [2024-06-14 11:49:31,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3583, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3916, PETRI_PLACES=265, PETRI_TRANSITIONS=358} [2024-06-14 11:49:31,954 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 220 predicate places. [2024-06-14 11:49:31,955 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 358 transitions, 3916 flow [2024-06-14 11:49:31,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:49:31,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:49:31,955 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 11:49:31,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-14 11:49:31,955 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:49:31,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:49:31,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1414147456, now seen corresponding path program 5 times [2024-06-14 11:49:31,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:49:31,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913677334] [2024-06-14 11:49:31,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:49:31,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:49:31,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:49:33,596 INFO 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 11:49:33,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:49:33,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913677334] [2024-06-14 11:49:33,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913677334] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:49:33,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:49:33,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 11:49:33,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544789377] [2024-06-14 11:49:33,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:49:33,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 11:49:33,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:49:33,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 11:49:33,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-14 11:49:33,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:49:33,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 358 transitions, 3916 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:49:33,733 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:49:33,733 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:49:33,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:49:35,286 INFO L124 PetriNetUnfolderBase]: 3455/5516 cut-off events. [2024-06-14 11:49:35,286 INFO L125 PetriNetUnfolderBase]: For 789657/789664 co-relation queries the response was YES. [2024-06-14 11:49:35,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51735 conditions, 5516 events. 3455/5516 cut-off events. For 789657/789664 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 32729 event pairs, 714 based on Foata normal form. 8/5520 useless extension candidates. Maximal degree in co-relation 51612. Up to 4705 conditions per place. [2024-06-14 11:49:35,354 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 273 selfloop transitions, 119 changer transitions 0/397 dead transitions. [2024-06-14 11:49:35,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 397 transitions, 4951 flow [2024-06-14 11:49:35,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:49:35,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:49:35,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 197 transitions. [2024-06-14 11:49:35,356 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44772727272727275 [2024-06-14 11:49:35,356 INFO L175 Difference]: Start difference. First operand has 265 places, 358 transitions, 3916 flow. Second operand 10 states and 197 transitions. [2024-06-14 11:49:35,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 397 transitions, 4951 flow [2024-06-14 11:49:36,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 397 transitions, 4676 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-06-14 11:49:36,161 INFO L231 Difference]: Finished difference. Result has 269 places, 360 transitions, 3980 flow [2024-06-14 11:49:36,161 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3641, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3980, PETRI_PLACES=269, PETRI_TRANSITIONS=360} [2024-06-14 11:49:36,161 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 224 predicate places. [2024-06-14 11:49:36,162 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 360 transitions, 3980 flow [2024-06-14 11:49:36,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:49:36,162 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:49:36,162 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 11:49:36,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-14 11:49:36,162 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 11:49:36,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:49:36,163 INFO L85 PathProgramCache]: Analyzing trace with hash 2127338144, now seen corresponding path program 1 times [2024-06-14 11:49:36,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:49:36,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900742856] [2024-06-14 11:49:36,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:49:36,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:49:36,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:49:37,291 INFO 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 11:49:37,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:49:37,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900742856] [2024-06-14 11:49:37,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900742856] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:49:37,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:49:37,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:49:37,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126312670] [2024-06-14 11:49:37,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:49:37,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:49:37,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:49:37,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:49:37,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:49:37,382 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-14 11:49:37,383 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 360 transitions, 3980 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:49:37,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:49:37,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-14 11:49:37,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:49:38,650 INFO L124 PetriNetUnfolderBase]: 3103/5102 cut-off events. [2024-06-14 11:49:38,651 INFO L125 PetriNetUnfolderBase]: For 802377/802381 co-relation queries the response was YES. [2024-06-14 11:49:38,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49511 conditions, 5102 events. 3103/5102 cut-off events. For 802377/802381 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 31502 event pairs, 682 based on Foata normal form. 4/5044 useless extension candidates. Maximal degree in co-relation 49387. Up to 4357 conditions per place. [2024-06-14 11:49:38,744 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 249 selfloop transitions, 68 changer transitions 0/383 dead transitions. [2024-06-14 11:49:38,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 383 transitions, 4736 flow [2024-06-14 11:49:38,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:49:38,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:49:38,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-06-14 11:49:38,746 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4602272727272727 [2024-06-14 11:49:38,746 INFO L175 Difference]: Start difference. First operand has 269 places, 360 transitions, 3980 flow. Second operand 8 states and 162 transitions. [2024-06-14 11:49:38,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 383 transitions, 4736 flow [2024-06-14 11:49:39,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 383 transitions, 4415 flow, removed 43 selfloop flow, removed 8 redundant places. [2024-06-14 11:49:39,879 INFO L231 Difference]: Finished difference. Result has 269 places, 363 transitions, 3864 flow [2024-06-14 11:49:39,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3659, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3864, PETRI_PLACES=269, PETRI_TRANSITIONS=363} [2024-06-14 11:49:39,880 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 224 predicate places. [2024-06-14 11:49:39,880 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 363 transitions, 3864 flow [2024-06-14 11:49:39,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:49:39,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:49:39,881 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 11:49:39,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-14 11:49:39,881 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 11:49:39,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:49:39,881 INFO L85 PathProgramCache]: Analyzing trace with hash 615768479, now seen corresponding path program 1 times [2024-06-14 11:49:39,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:49:39,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298717662] [2024-06-14 11:49:39,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:49:39,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:49:39,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:49:41,372 INFO 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 11:49:41,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:49:41,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298717662] [2024-06-14 11:49:41,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298717662] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:49:41,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:49:41,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:49:41,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11102055] [2024-06-14 11:49:41,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:49:41,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:49:41,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:49:41,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:49:41,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:49:41,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-14 11:49:41,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 363 transitions, 3864 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:49:41,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:49:41,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-14 11:49:41,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:49:42,703 INFO L124 PetriNetUnfolderBase]: 3101/5097 cut-off events. [2024-06-14 11:49:42,703 INFO L125 PetriNetUnfolderBase]: For 819618/819624 co-relation queries the response was YES. [2024-06-14 11:49:42,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49707 conditions, 5097 events. 3101/5097 cut-off events. For 819618/819624 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 31415 event pairs, 692 based on Foata normal form. 5/5035 useless extension candidates. Maximal degree in co-relation 49582. Up to 4458 conditions per place. [2024-06-14 11:49:42,806 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 290 selfloop transitions, 25 changer transitions 0/381 dead transitions. [2024-06-14 11:49:42,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 381 transitions, 4606 flow [2024-06-14 11:49:42,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:49:42,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:49:42,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-14 11:49:42,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-06-14 11:49:42,808 INFO L175 Difference]: Start difference. First operand has 269 places, 363 transitions, 3864 flow. Second operand 8 states and 156 transitions. [2024-06-14 11:49:42,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 381 transitions, 4606 flow [2024-06-14 11:49:44,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 381 transitions, 4433 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-14 11:49:44,044 INFO L231 Difference]: Finished difference. Result has 271 places, 366 transitions, 3815 flow [2024-06-14 11:49:44,044 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3691, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3815, PETRI_PLACES=271, PETRI_TRANSITIONS=366} [2024-06-14 11:49:44,045 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 226 predicate places. [2024-06-14 11:49:44,045 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 366 transitions, 3815 flow [2024-06-14 11:49:44,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:49:44,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:49:44,045 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 11:49:44,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-14 11:49:44,045 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 11:49:44,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:49:44,046 INFO L85 PathProgramCache]: Analyzing trace with hash 615768014, now seen corresponding path program 2 times [2024-06-14 11:49:44,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:49:44,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115028205] [2024-06-14 11:49:44,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:49:44,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:49:44,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:49:45,413 INFO 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 11:49:45,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:49:45,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115028205] [2024-06-14 11:49:45,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115028205] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:49:45,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:49:45,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:49:45,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757024689] [2024-06-14 11:49:45,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:49:45,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:49:45,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:49:45,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:49:45,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:49:45,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-14 11:49:45,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 366 transitions, 3815 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:49:45,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:49:45,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-14 11:49:45,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:49:46,540 INFO L124 PetriNetUnfolderBase]: 3135/5135 cut-off events. [2024-06-14 11:49:46,541 INFO L125 PetriNetUnfolderBase]: For 842410/842424 co-relation queries the response was YES. [2024-06-14 11:49:46,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50583 conditions, 5135 events. 3135/5135 cut-off events. For 842410/842424 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 31423 event pairs, 692 based on Foata normal form. 8/5071 useless extension candidates. Maximal degree in co-relation 50457. Up to 4358 conditions per place. [2024-06-14 11:49:46,624 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 244 selfloop transitions, 78 changer transitions 0/388 dead transitions. [2024-06-14 11:49:46,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 388 transitions, 4799 flow [2024-06-14 11:49:46,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:49:46,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:49:46,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-14 11:49:46,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-14 11:49:46,626 INFO L175 Difference]: Start difference. First operand has 271 places, 366 transitions, 3815 flow. Second operand 8 states and 160 transitions. [2024-06-14 11:49:46,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 388 transitions, 4799 flow [2024-06-14 11:49:47,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 388 transitions, 4697 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-14 11:49:47,581 INFO L231 Difference]: Finished difference. Result has 273 places, 372 transitions, 4001 flow [2024-06-14 11:49:47,581 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3713, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4001, PETRI_PLACES=273, PETRI_TRANSITIONS=372} [2024-06-14 11:49:47,581 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 228 predicate places. [2024-06-14 11:49:47,582 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 372 transitions, 4001 flow [2024-06-14 11:49:47,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:49:47,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:49:47,582 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 11:49:47,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-14 11:49:47,582 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 11:49:47,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:49:47,583 INFO L85 PathProgramCache]: Analyzing trace with hash 936685354, now seen corresponding path program 3 times [2024-06-14 11:49:47,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:49:47,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140160950] [2024-06-14 11:49:47,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:49:47,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:49:47,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:49:48,705 INFO 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 11:49:48,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:49:48,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140160950] [2024-06-14 11:49:48,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140160950] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:49:48,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:49:48,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:49:48,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271288281] [2024-06-14 11:49:48,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:49:48,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:49:48,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:49:48,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:49:48,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:49:48,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-14 11:49:48,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 372 transitions, 4001 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:49:48,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:49:48,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-14 11:49:48,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:49:50,020 INFO L124 PetriNetUnfolderBase]: 3131/5128 cut-off events. [2024-06-14 11:49:50,020 INFO L125 PetriNetUnfolderBase]: For 856383/856397 co-relation queries the response was YES. [2024-06-14 11:49:50,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51072 conditions, 5128 events. 3131/5128 cut-off events. For 856383/856397 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 31333 event pairs, 691 based on Foata normal form. 7/5064 useless extension candidates. Maximal degree in co-relation 50945. Up to 4387 conditions per place. [2024-06-14 11:49:50,094 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 251 selfloop transitions, 70 changer transitions 0/387 dead transitions. [2024-06-14 11:49:50,095 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 387 transitions, 4693 flow [2024-06-14 11:49:50,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:49:50,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:49:50,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-14 11:49:50,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44886363636363635 [2024-06-14 11:49:50,096 INFO L175 Difference]: Start difference. First operand has 273 places, 372 transitions, 4001 flow. Second operand 8 states and 158 transitions. [2024-06-14 11:49:50,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 387 transitions, 4693 flow [2024-06-14 11:49:51,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 387 transitions, 4515 flow, removed 47 selfloop flow, removed 4 redundant places. [2024-06-14 11:49:51,020 INFO L231 Difference]: Finished difference. Result has 277 places, 372 transitions, 3969 flow [2024-06-14 11:49:51,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3823, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3969, PETRI_PLACES=277, PETRI_TRANSITIONS=372} [2024-06-14 11:49:51,020 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 232 predicate places. [2024-06-14 11:49:51,020 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 372 transitions, 3969 flow [2024-06-14 11:49:51,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:49:51,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:49:51,021 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 11:49:51,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-14 11:49:51,021 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 11:49:51,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:49:51,021 INFO L85 PathProgramCache]: Analyzing trace with hash 781583201, now seen corresponding path program 3 times [2024-06-14 11:49:51,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:49:51,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244129784] [2024-06-14 11:49:51,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:49:51,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:49:51,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:49:51,805 INFO 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 11:49:51,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:49:51,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244129784] [2024-06-14 11:49:51,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244129784] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:49:51,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:49:51,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:49:51,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005003275] [2024-06-14 11:49:51,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:49:51,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:49:51,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:49:51,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:49:51,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:49:51,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:49:51,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 372 transitions, 3969 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:49:51,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:49:51,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:49:51,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:49:53,117 INFO L124 PetriNetUnfolderBase]: 3495/5569 cut-off events. [2024-06-14 11:49:53,117 INFO L125 PetriNetUnfolderBase]: For 863013/863019 co-relation queries the response was YES. [2024-06-14 11:49:53,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54023 conditions, 5569 events. 3495/5569 cut-off events. For 863013/863019 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 32864 event pairs, 738 based on Foata normal form. 5/5567 useless extension candidates. Maximal degree in co-relation 53894. Up to 5232 conditions per place. [2024-06-14 11:49:53,185 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 351 selfloop transitions, 35 changer transitions 0/391 dead transitions. [2024-06-14 11:49:53,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 391 transitions, 4885 flow [2024-06-14 11:49:53,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:49:53,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:49:53,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-14 11:49:53,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42207792207792205 [2024-06-14 11:49:53,186 INFO L175 Difference]: Start difference. First operand has 277 places, 372 transitions, 3969 flow. Second operand 7 states and 130 transitions. [2024-06-14 11:49:53,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 391 transitions, 4885 flow [2024-06-14 11:49:54,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 391 transitions, 4718 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-14 11:49:54,135 INFO L231 Difference]: Finished difference. Result has 277 places, 375 transitions, 3965 flow [2024-06-14 11:49:54,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3802, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3965, PETRI_PLACES=277, PETRI_TRANSITIONS=375} [2024-06-14 11:49:54,136 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 232 predicate places. [2024-06-14 11:49:54,136 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 375 transitions, 3965 flow [2024-06-14 11:49:54,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:49:54,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:49:54,136 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 11:49:54,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-14 11:49:54,137 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 11:49:54,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:49:54,137 INFO L85 PathProgramCache]: Analyzing trace with hash 137795773, now seen corresponding path program 4 times [2024-06-14 11:49:54,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:49:54,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848467373] [2024-06-14 11:49:54,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:49:54,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:49:54,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:49:55,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:49:55,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:49:55,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848467373] [2024-06-14 11:49:55,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848467373] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:49:55,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:49:55,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:49:55,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869299317] [2024-06-14 11:49:55,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:49:55,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:49:55,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:49:55,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:49:55,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:49:55,175 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:49:55,176 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 375 transitions, 3965 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:49:55,176 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:49:55,176 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:49:55,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:49:56,536 INFO L124 PetriNetUnfolderBase]: 3500/5575 cut-off events. [2024-06-14 11:49:56,537 INFO L125 PetriNetUnfolderBase]: For 881375/881381 co-relation queries the response was YES. [2024-06-14 11:49:56,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54196 conditions, 5575 events. 3500/5575 cut-off events. For 881375/881381 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 32868 event pairs, 738 based on Foata normal form. 5/5573 useless extension candidates. Maximal degree in co-relation 54066. Up to 5224 conditions per place. [2024-06-14 11:49:56,610 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 341 selfloop transitions, 46 changer transitions 0/392 dead transitions. [2024-06-14 11:49:56,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 392 transitions, 5059 flow [2024-06-14 11:49:56,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:49:56,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:49:56,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-14 11:49:56,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41883116883116883 [2024-06-14 11:49:56,611 INFO L175 Difference]: Start difference. First operand has 277 places, 375 transitions, 3965 flow. Second operand 7 states and 129 transitions. [2024-06-14 11:49:56,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 392 transitions, 5059 flow [2024-06-14 11:49:57,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 392 transitions, 4926 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-14 11:49:57,556 INFO L231 Difference]: Finished difference. Result has 279 places, 378 transitions, 4030 flow [2024-06-14 11:49:57,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3832, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4030, PETRI_PLACES=279, PETRI_TRANSITIONS=378} [2024-06-14 11:49:57,559 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 234 predicate places. [2024-06-14 11:49:57,559 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 378 transitions, 4030 flow [2024-06-14 11:49:57,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:49:57,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:49:57,559 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 11:49:57,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-14 11:49:57,559 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 11:49:57,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:49:57,560 INFO L85 PathProgramCache]: Analyzing trace with hash 550037183, now seen corresponding path program 5 times [2024-06-14 11:49:57,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:49:57,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980324583] [2024-06-14 11:49:57,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:49:57,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:49:57,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:49:58,510 INFO 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 11:49:58,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:49:58,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980324583] [2024-06-14 11:49:58,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980324583] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:49:58,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:49:58,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:49:58,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551166565] [2024-06-14 11:49:58,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:49:58,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:49:58,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:49:58,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:49:58,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:49:58,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:49:58,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 378 transitions, 4030 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:49:58,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:49:58,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:49:58,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:49:59,751 INFO L124 PetriNetUnfolderBase]: 3505/5585 cut-off events. [2024-06-14 11:49:59,751 INFO L125 PetriNetUnfolderBase]: For 900777/900786 co-relation queries the response was YES. [2024-06-14 11:49:59,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54776 conditions, 5585 events. 3505/5585 cut-off events. For 900777/900786 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 32974 event pairs, 752 based on Foata normal form. 7/5580 useless extension candidates. Maximal degree in co-relation 54645. Up to 5205 conditions per place. [2024-06-14 11:49:59,816 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 328 selfloop transitions, 63 changer transitions 0/396 dead transitions. [2024-06-14 11:49:59,817 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 396 transitions, 5404 flow [2024-06-14 11:49:59,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:49:59,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:49:59,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-14 11:49:59,818 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4005681818181818 [2024-06-14 11:49:59,818 INFO L175 Difference]: Start difference. First operand has 279 places, 378 transitions, 4030 flow. Second operand 8 states and 141 transitions. [2024-06-14 11:49:59,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 396 transitions, 5404 flow [2024-06-14 11:50:01,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 396 transitions, 5242 flow, removed 46 selfloop flow, removed 4 redundant places. [2024-06-14 11:50:01,026 INFO L231 Difference]: Finished difference. Result has 283 places, 384 transitions, 4206 flow [2024-06-14 11:50:01,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3868, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4206, PETRI_PLACES=283, PETRI_TRANSITIONS=384} [2024-06-14 11:50:01,026 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 238 predicate places. [2024-06-14 11:50:01,026 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 384 transitions, 4206 flow [2024-06-14 11:50:01,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:50:01,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:50:01,027 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 11:50:01,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-14 11:50:01,028 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 11:50:01,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:50:01,028 INFO L85 PathProgramCache]: Analyzing trace with hash 359030683, now seen corresponding path program 6 times [2024-06-14 11:50:01,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:50:01,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618265704] [2024-06-14 11:50:01,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:50:01,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:50:01,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:50:02,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:50:02,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:50:02,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618265704] [2024-06-14 11:50:02,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618265704] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:50:02,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:50:02,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:50:02,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841738517] [2024-06-14 11:50:02,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:50:02,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:50:02,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:50:02,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:50:02,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:50:02,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:50:02,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 384 transitions, 4206 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:50:02,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:50:02,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:50:02,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:50:03,335 INFO L124 PetriNetUnfolderBase]: 3502/5581 cut-off events. [2024-06-14 11:50:03,336 INFO L125 PetriNetUnfolderBase]: For 917817/917826 co-relation queries the response was YES. [2024-06-14 11:50:03,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55076 conditions, 5581 events. 3502/5581 cut-off events. For 917817/917826 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 32952 event pairs, 752 based on Foata normal form. 7/5576 useless extension candidates. Maximal degree in co-relation 54944. Up to 5202 conditions per place. [2024-06-14 11:50:03,413 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 329 selfloop transitions, 61 changer transitions 0/395 dead transitions. [2024-06-14 11:50:03,413 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 395 transitions, 5202 flow [2024-06-14 11:50:03,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:50:03,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:50:03,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-14 11:50:03,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4155844155844156 [2024-06-14 11:50:03,414 INFO L175 Difference]: Start difference. First operand has 283 places, 384 transitions, 4206 flow. Second operand 7 states and 128 transitions. [2024-06-14 11:50:03,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 395 transitions, 5202 flow [2024-06-14 11:50:04,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 395 transitions, 4954 flow, removed 92 selfloop flow, removed 4 redundant places. [2024-06-14 11:50:04,636 INFO L231 Difference]: Finished difference. Result has 286 places, 384 transitions, 4086 flow [2024-06-14 11:50:04,636 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3958, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4086, PETRI_PLACES=286, PETRI_TRANSITIONS=384} [2024-06-14 11:50:04,636 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 241 predicate places. [2024-06-14 11:50:04,637 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 384 transitions, 4086 flow [2024-06-14 11:50:04,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:50:04,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:50:04,637 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 11:50:04,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-14 11:50:04,637 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:50:04,638 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:50:04,638 INFO L85 PathProgramCache]: Analyzing trace with hash 768097283, now seen corresponding path program 11 times [2024-06-14 11:50:04,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:50:04,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621214144] [2024-06-14 11:50:04,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:50:04,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:50:04,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:50:05,690 INFO 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 11:50:05,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:50:05,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621214144] [2024-06-14 11:50:05,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621214144] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:50:05,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:50:05,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 11:50:05,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127820748] [2024-06-14 11:50:05,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:50:05,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 11:50:05,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:50:05,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 11:50:05,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-06-14 11:50:05,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:50:05,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 384 transitions, 4086 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:50:05,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:50:05,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:50:05,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:50:07,446 INFO L124 PetriNetUnfolderBase]: 3577/5690 cut-off events. [2024-06-14 11:50:07,446 INFO L125 PetriNetUnfolderBase]: For 1000396/1000396 co-relation queries the response was YES. [2024-06-14 11:50:07,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56269 conditions, 5690 events. 3577/5690 cut-off events. For 1000396/1000396 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 33638 event pairs, 666 based on Foata normal form. 20/5691 useless extension candidates. Maximal degree in co-relation 56135. Up to 4543 conditions per place. [2024-06-14 11:50:07,520 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 267 selfloop transitions, 151 changer transitions 0/423 dead transitions. [2024-06-14 11:50:07,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 423 transitions, 5226 flow [2024-06-14 11:50:07,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:50:07,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:50:07,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 199 transitions. [2024-06-14 11:50:07,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45227272727272727 [2024-06-14 11:50:07,521 INFO L175 Difference]: Start difference. First operand has 286 places, 384 transitions, 4086 flow. Second operand 10 states and 199 transitions. [2024-06-14 11:50:07,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 423 transitions, 5226 flow [2024-06-14 11:50:08,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 423 transitions, 5054 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-14 11:50:08,756 INFO L231 Difference]: Finished difference. Result has 289 places, 385 transitions, 4303 flow [2024-06-14 11:50:08,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3914, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4303, PETRI_PLACES=289, PETRI_TRANSITIONS=385} [2024-06-14 11:50:08,757 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 244 predicate places. [2024-06-14 11:50:08,757 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 385 transitions, 4303 flow [2024-06-14 11:50:08,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:50:08,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:50:08,758 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 11:50:08,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-14 11:50:08,758 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:50:08,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:50:08,759 INFO L85 PathProgramCache]: Analyzing trace with hash -1477144373, now seen corresponding path program 12 times [2024-06-14 11:50:08,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:50:08,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977980918] [2024-06-14 11:50:08,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:50:08,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:50:08,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:50:09,925 INFO 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 11:50:09,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:50:09,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977980918] [2024-06-14 11:50:09,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977980918] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:50:09,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:50:09,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 11:50:09,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173088231] [2024-06-14 11:50:09,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:50:09,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 11:50:09,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:50:09,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 11:50:09,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-06-14 11:50:10,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:50:10,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 385 transitions, 4303 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:50:10,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:50:10,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:50:10,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:50:11,810 INFO L124 PetriNetUnfolderBase]: 3652/5812 cut-off events. [2024-06-14 11:50:11,810 INFO L125 PetriNetUnfolderBase]: For 1039308/1039308 co-relation queries the response was YES. [2024-06-14 11:50:11,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58230 conditions, 5812 events. 3652/5812 cut-off events. For 1039308/1039308 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 34566 event pairs, 667 based on Foata normal form. 20/5813 useless extension candidates. Maximal degree in co-relation 58096. Up to 4668 conditions per place. [2024-06-14 11:50:11,905 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 281 selfloop transitions, 141 changer transitions 0/427 dead transitions. [2024-06-14 11:50:11,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 427 transitions, 5485 flow [2024-06-14 11:50:11,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:50:11,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:50:11,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 202 transitions. [2024-06-14 11:50:11,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4590909090909091 [2024-06-14 11:50:11,906 INFO L175 Difference]: Start difference. First operand has 289 places, 385 transitions, 4303 flow. Second operand 10 states and 202 transitions. [2024-06-14 11:50:11,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 427 transitions, 5485 flow [2024-06-14 11:50:13,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 427 transitions, 5126 flow, removed 30 selfloop flow, removed 8 redundant places. [2024-06-14 11:50:13,333 INFO L231 Difference]: Finished difference. Result has 291 places, 386 transitions, 4315 flow [2024-06-14 11:50:13,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3944, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4315, PETRI_PLACES=291, PETRI_TRANSITIONS=386} [2024-06-14 11:50:13,334 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 246 predicate places. [2024-06-14 11:50:13,334 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 386 transitions, 4315 flow [2024-06-14 11:50:13,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:50:13,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:50:13,334 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 11:50:13,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-14 11:50:13,334 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:50:13,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:50:13,335 INFO L85 PathProgramCache]: Analyzing trace with hash -768610017, now seen corresponding path program 13 times [2024-06-14 11:50:13,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:50:13,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761655314] [2024-06-14 11:50:13,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:50:13,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:50:13,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:50:14,430 INFO 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 11:50:14,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:50:14,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761655314] [2024-06-14 11:50:14,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761655314] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:50:14,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:50:14,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 11:50:14,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258868176] [2024-06-14 11:50:14,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:50:14,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 11:50:14,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:50:14,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 11:50:14,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-06-14 11:50:14,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:50:14,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 386 transitions, 4315 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:50:14,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:50:14,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:50:14,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:50:16,599 INFO L124 PetriNetUnfolderBase]: 3727/5937 cut-off events. [2024-06-14 11:50:16,599 INFO L125 PetriNetUnfolderBase]: For 1066401/1066401 co-relation queries the response was YES. [2024-06-14 11:50:16,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59233 conditions, 5937 events. 3727/5937 cut-off events. For 1066401/1066401 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 35598 event pairs, 720 based on Foata normal form. 20/5938 useless extension candidates. Maximal degree in co-relation 59098. Up to 4793 conditions per place. [2024-06-14 11:50:16,725 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 285 selfloop transitions, 138 changer transitions 0/428 dead transitions. [2024-06-14 11:50:16,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 428 transitions, 5509 flow [2024-06-14 11:50:16,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:50:16,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:50:16,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 203 transitions. [2024-06-14 11:50:16,727 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46136363636363636 [2024-06-14 11:50:16,727 INFO L175 Difference]: Start difference. First operand has 291 places, 386 transitions, 4315 flow. Second operand 10 states and 203 transitions. [2024-06-14 11:50:16,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 428 transitions, 5509 flow [2024-06-14 11:50:18,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 428 transitions, 5168 flow, removed 31 selfloop flow, removed 8 redundant places. [2024-06-14 11:50:18,407 INFO L231 Difference]: Finished difference. Result has 293 places, 387 transitions, 4341 flow [2024-06-14 11:50:18,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3974, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4341, PETRI_PLACES=293, PETRI_TRANSITIONS=387} [2024-06-14 11:50:18,408 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 248 predicate places. [2024-06-14 11:50:18,408 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 387 transitions, 4341 flow [2024-06-14 11:50:18,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:50:18,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:50:18,409 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 11:50:18,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-14 11:50:18,409 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:50:18,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:50:18,410 INFO L85 PathProgramCache]: Analyzing trace with hash 298681143, now seen corresponding path program 14 times [2024-06-14 11:50:18,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:50:18,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754923529] [2024-06-14 11:50:18,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:50:18,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:50:18,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:50:19,709 INFO 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 11:50:19,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:50:19,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754923529] [2024-06-14 11:50:19,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754923529] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:50:19,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:50:19,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 11:50:19,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553887540] [2024-06-14 11:50:19,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:50:19,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 11:50:19,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:50:19,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 11:50:19,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-06-14 11:50:19,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:50:19,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 387 transitions, 4341 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:50:19,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:50:19,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:50:19,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:50:21,602 INFO L124 PetriNetUnfolderBase]: 3802/6072 cut-off events. [2024-06-14 11:50:21,602 INFO L125 PetriNetUnfolderBase]: For 1092467/1092467 co-relation queries the response was YES. [2024-06-14 11:50:21,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60277 conditions, 6072 events. 3802/6072 cut-off events. For 1092467/1092467 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 36716 event pairs, 732 based on Foata normal form. 20/6073 useless extension candidates. Maximal degree in co-relation 60141. Up to 4918 conditions per place. [2024-06-14 11:50:21,725 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 281 selfloop transitions, 143 changer transitions 0/429 dead transitions. [2024-06-14 11:50:21,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 429 transitions, 5531 flow [2024-06-14 11:50:21,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:50:21,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:50:21,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 201 transitions. [2024-06-14 11:50:21,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45681818181818185 [2024-06-14 11:50:21,727 INFO L175 Difference]: Start difference. First operand has 293 places, 387 transitions, 4341 flow. Second operand 10 states and 201 transitions. [2024-06-14 11:50:21,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 429 transitions, 5531 flow [2024-06-14 11:50:23,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 429 transitions, 5194 flow, removed 32 selfloop flow, removed 8 redundant places. [2024-06-14 11:50:23,063 INFO L231 Difference]: Finished difference. Result has 295 places, 388 transitions, 4383 flow [2024-06-14 11:50:23,070 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4004, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4383, PETRI_PLACES=295, PETRI_TRANSITIONS=388} [2024-06-14 11:50:23,070 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 250 predicate places. [2024-06-14 11:50:23,071 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 388 transitions, 4383 flow [2024-06-14 11:50:23,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:50:23,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:50:23,071 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 11:50:23,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-14 11:50:23,071 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:50:23,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:50:23,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1482654623, now seen corresponding path program 15 times [2024-06-14 11:50:23,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:50:23,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720550367] [2024-06-14 11:50:23,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:50:23,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:50:23,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:50:24,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:50:24,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:50:24,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720550367] [2024-06-14 11:50:24,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720550367] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:50:24,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:50:24,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 11:50:24,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247954747] [2024-06-14 11:50:24,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:50:24,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 11:50:24,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:50:24,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 11:50:24,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-14 11:50:24,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:50:24,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 388 transitions, 4383 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:50:24,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:50:24,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:50:24,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:50:26,071 INFO L124 PetriNetUnfolderBase]: 3810/6087 cut-off events. [2024-06-14 11:50:26,072 INFO L125 PetriNetUnfolderBase]: For 1067991/1067991 co-relation queries the response was YES. [2024-06-14 11:50:26,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59502 conditions, 6087 events. 3810/6087 cut-off events. For 1067991/1067991 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 36713 event pairs, 719 based on Foata normal form. 16/6084 useless extension candidates. Maximal degree in co-relation 59365. Up to 4468 conditions per place. [2024-06-14 11:50:26,159 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 280 selfloop transitions, 148 changer transitions 0/433 dead transitions. [2024-06-14 11:50:26,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 433 transitions, 5605 flow [2024-06-14 11:50:26,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:50:26,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:50:26,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 203 transitions. [2024-06-14 11:50:26,160 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46136363636363636 [2024-06-14 11:50:26,160 INFO L175 Difference]: Start difference. First operand has 295 places, 388 transitions, 4383 flow. Second operand 10 states and 203 transitions. [2024-06-14 11:50:26,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 433 transitions, 5605 flow [2024-06-14 11:50:28,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 433 transitions, 5256 flow, removed 33 selfloop flow, removed 8 redundant places. [2024-06-14 11:50:28,692 INFO L231 Difference]: Finished difference. Result has 297 places, 389 transitions, 4424 flow [2024-06-14 11:50:28,692 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4034, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4424, PETRI_PLACES=297, PETRI_TRANSITIONS=389} [2024-06-14 11:50:28,693 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 252 predicate places. [2024-06-14 11:50:28,693 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 389 transitions, 4424 flow [2024-06-14 11:50:28,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:50:28,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:50:28,693 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 11:50:28,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-14 11:50:28,694 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:50:28,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:50:28,694 INFO L85 PathProgramCache]: Analyzing trace with hash 656444744, now seen corresponding path program 6 times [2024-06-14 11:50:28,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:50:28,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419688495] [2024-06-14 11:50:28,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:50:28,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:50:28,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:50:30,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:50:30,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:50:30,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419688495] [2024-06-14 11:50:30,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419688495] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:50:30,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:50:30,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 11:50:30,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372840773] [2024-06-14 11:50:30,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:50:30,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 11:50:30,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:50:30,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 11:50:30,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-14 11:50:30,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:50:30,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 389 transitions, 4424 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:50:30,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:50:30,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:50:30,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:50:31,804 INFO L124 PetriNetUnfolderBase]: 3863/6196 cut-off events. [2024-06-14 11:50:31,804 INFO L125 PetriNetUnfolderBase]: For 1057184/1057196 co-relation queries the response was YES. [2024-06-14 11:50:31,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60391 conditions, 6196 events. 3863/6196 cut-off events. For 1057184/1057196 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 37834 event pairs, 793 based on Foata normal form. 12/6195 useless extension candidates. Maximal degree in co-relation 60253. Up to 5417 conditions per place. [2024-06-14 11:50:31,888 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 304 selfloop transitions, 129 changer transitions 0/438 dead transitions. [2024-06-14 11:50:31,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 438 transitions, 6050 flow [2024-06-14 11:50:31,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:50:31,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:50:31,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 195 transitions. [2024-06-14 11:50:31,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-06-14 11:50:31,890 INFO L175 Difference]: Start difference. First operand has 297 places, 389 transitions, 4424 flow. Second operand 10 states and 195 transitions. [2024-06-14 11:50:31,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 438 transitions, 6050 flow [2024-06-14 11:50:33,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 438 transitions, 5664 flow, removed 37 selfloop flow, removed 8 redundant places. [2024-06-14 11:50:33,850 INFO L231 Difference]: Finished difference. Result has 300 places, 403 transitions, 4653 flow [2024-06-14 11:50:33,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4056, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4653, PETRI_PLACES=300, PETRI_TRANSITIONS=403} [2024-06-14 11:50:33,850 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 255 predicate places. [2024-06-14 11:50:33,850 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 403 transitions, 4653 flow [2024-06-14 11:50:33,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:50:33,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:50:33,851 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 11:50:33,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-14 11:50:33,851 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:50:33,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:50:33,851 INFO L85 PathProgramCache]: Analyzing trace with hash 400864756, now seen corresponding path program 7 times [2024-06-14 11:50:33,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:50:33,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479102640] [2024-06-14 11:50:33,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:50:33,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:50:33,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:50:34,941 INFO 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 11:50:34,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:50:34,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479102640] [2024-06-14 11:50:34,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479102640] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:50:34,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:50:34,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 11:50:34,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397661741] [2024-06-14 11:50:34,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:50:34,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 11:50:34,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:50:34,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 11:50:34,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-06-14 11:50:35,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:50:35,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 403 transitions, 4653 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:50:35,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:50:35,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:50:35,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:50:36,732 INFO L124 PetriNetUnfolderBase]: 3891/6244 cut-off events. [2024-06-14 11:50:36,733 INFO L125 PetriNetUnfolderBase]: For 1069700/1069712 co-relation queries the response was YES. [2024-06-14 11:50:36,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60860 conditions, 6244 events. 3891/6244 cut-off events. For 1069700/1069712 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 38212 event pairs, 808 based on Foata normal form. 12/6243 useless extension candidates. Maximal degree in co-relation 60720. Up to 5503 conditions per place. [2024-06-14 11:50:36,835 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 311 selfloop transitions, 125 changer transitions 0/441 dead transitions. [2024-06-14 11:50:36,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 441 transitions, 5808 flow [2024-06-14 11:50:36,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:50:36,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:50:36,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 192 transitions. [2024-06-14 11:50:36,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43636363636363634 [2024-06-14 11:50:36,837 INFO L175 Difference]: Start difference. First operand has 300 places, 403 transitions, 4653 flow. Second operand 10 states and 192 transitions. [2024-06-14 11:50:36,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 441 transitions, 5808 flow [2024-06-14 11:50:39,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 441 transitions, 5603 flow, removed 65 selfloop flow, removed 3 redundant places. [2024-06-14 11:50:39,196 INFO L231 Difference]: Finished difference. Result has 308 places, 409 transitions, 4877 flow [2024-06-14 11:50:39,196 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4448, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4877, PETRI_PLACES=308, PETRI_TRANSITIONS=409} [2024-06-14 11:50:39,196 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 263 predicate places. [2024-06-14 11:50:39,196 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 409 transitions, 4877 flow [2024-06-14 11:50:39,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:50:39,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:50:39,197 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 11:50:39,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-14 11:50:39,197 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:50:39,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:50:39,197 INFO L85 PathProgramCache]: Analyzing trace with hash -1275580172, now seen corresponding path program 8 times [2024-06-14 11:50:39,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:50:39,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024097913] [2024-06-14 11:50:39,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:50:39,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:50:39,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:50:40,647 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 11:50:40,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:50:40,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024097913] [2024-06-14 11:50:40,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024097913] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:50:40,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:50:40,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 11:50:40,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951343136] [2024-06-14 11:50:40,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:50:40,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 11:50:40,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:50:40,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 11:50:40,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-14 11:50:40,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:50:40,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 409 transitions, 4877 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:50:40,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:50:40,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:50:40,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:50:42,598 INFO L124 PetriNetUnfolderBase]: 3919/6272 cut-off events. [2024-06-14 11:50:42,599 INFO L125 PetriNetUnfolderBase]: For 1083101/1083113 co-relation queries the response was YES. [2024-06-14 11:50:42,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60281 conditions, 6272 events. 3919/6272 cut-off events. For 1083101/1083113 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 38299 event pairs, 793 based on Foata normal form. 12/6271 useless extension candidates. Maximal degree in co-relation 60138. Up to 5542 conditions per place. [2024-06-14 11:50:42,687 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 324 selfloop transitions, 118 changer transitions 0/447 dead transitions. [2024-06-14 11:50:42,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 447 transitions, 6043 flow [2024-06-14 11:50:42,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:50:42,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:50:42,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 194 transitions. [2024-06-14 11:50:42,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4409090909090909 [2024-06-14 11:50:42,689 INFO L175 Difference]: Start difference. First operand has 308 places, 409 transitions, 4877 flow. Second operand 10 states and 194 transitions. [2024-06-14 11:50:42,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 447 transitions, 6043 flow [2024-06-14 11:50:44,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 447 transitions, 5674 flow, removed 59 selfloop flow, removed 7 redundant places. [2024-06-14 11:50:44,444 INFO L231 Difference]: Finished difference. Result has 311 places, 414 transitions, 4900 flow [2024-06-14 11:50:44,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4514, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=409, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4900, PETRI_PLACES=311, PETRI_TRANSITIONS=414} [2024-06-14 11:50:44,445 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 266 predicate places. [2024-06-14 11:50:44,445 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 414 transitions, 4900 flow [2024-06-14 11:50:44,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:50:44,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:50:44,445 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 11:50:44,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-14 11:50:44,445 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:50:44,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:50:44,446 INFO L85 PathProgramCache]: Analyzing trace with hash 656175974, now seen corresponding path program 9 times [2024-06-14 11:50:44,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:50:44,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442684269] [2024-06-14 11:50:44,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:50:44,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:50:44,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:50:45,621 INFO 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 11:50:45,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:50:45,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442684269] [2024-06-14 11:50:45,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442684269] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:50:45,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:50:45,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 11:50:45,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038117139] [2024-06-14 11:50:45,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:50:45,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 11:50:45,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:50:45,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 11:50:45,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-14 11:50:45,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:50:45,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 414 transitions, 4900 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:50:45,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:50:45,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:50:45,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:50:47,409 INFO L124 PetriNetUnfolderBase]: 3911/6260 cut-off events. [2024-06-14 11:50:47,409 INFO L125 PetriNetUnfolderBase]: For 1087546/1087558 co-relation queries the response was YES. [2024-06-14 11:50:47,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59910 conditions, 6260 events. 3911/6260 cut-off events. For 1087546/1087558 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 38157 event pairs, 791 based on Foata normal form. 12/6259 useless extension candidates. Maximal degree in co-relation 59766. Up to 5530 conditions per place. [2024-06-14 11:50:47,503 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 308 selfloop transitions, 133 changer transitions 0/446 dead transitions. [2024-06-14 11:50:47,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 446 transitions, 5911 flow [2024-06-14 11:50:47,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:50:47,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:50:47,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 191 transitions. [2024-06-14 11:50:47,507 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4340909090909091 [2024-06-14 11:50:47,507 INFO L175 Difference]: Start difference. First operand has 311 places, 414 transitions, 4900 flow. Second operand 10 states and 191 transitions. [2024-06-14 11:50:47,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 446 transitions, 5911 flow [2024-06-14 11:50:49,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 446 transitions, 5471 flow, removed 100 selfloop flow, removed 10 redundant places. [2024-06-14 11:50:49,670 INFO L231 Difference]: Finished difference. Result has 311 places, 414 transitions, 4733 flow [2024-06-14 11:50:49,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4460, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4733, PETRI_PLACES=311, PETRI_TRANSITIONS=414} [2024-06-14 11:50:49,671 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 266 predicate places. [2024-06-14 11:50:49,671 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 414 transitions, 4733 flow [2024-06-14 11:50:49,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:50:49,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:50:49,672 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 11:50:49,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-14 11:50:49,672 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:50:49,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:50:49,672 INFO L85 PathProgramCache]: Analyzing trace with hash -760975926, now seen corresponding path program 10 times [2024-06-14 11:50:49,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:50:49,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635289435] [2024-06-14 11:50:49,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:50:49,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:50:49,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:50:50,806 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 11:50:50,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:50:50,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635289435] [2024-06-14 11:50:50,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635289435] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:50:50,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:50:50,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 11:50:50,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634956172] [2024-06-14 11:50:50,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:50:50,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 11:50:50,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:50:50,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 11:50:50,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-14 11:50:50,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:50:50,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 414 transitions, 4733 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:50:50,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:50:50,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:50:50,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:50:52,623 INFO L124 PetriNetUnfolderBase]: 3953/6336 cut-off events. [2024-06-14 11:50:52,623 INFO L125 PetriNetUnfolderBase]: For 1124860/1124872 co-relation queries the response was YES. [2024-06-14 11:50:52,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60842 conditions, 6336 events. 3953/6336 cut-off events. For 1124860/1124872 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 38817 event pairs, 798 based on Foata normal form. 12/6335 useless extension candidates. Maximal degree in co-relation 60702. Up to 5526 conditions per place. [2024-06-14 11:50:52,716 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 326 selfloop transitions, 123 changer transitions 0/454 dead transitions. [2024-06-14 11:50:52,716 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 454 transitions, 6342 flow [2024-06-14 11:50:52,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:50:52,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:50:52,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 197 transitions. [2024-06-14 11:50:52,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44772727272727275 [2024-06-14 11:50:52,718 INFO L175 Difference]: Start difference. First operand has 311 places, 414 transitions, 4733 flow. Second operand 10 states and 197 transitions. [2024-06-14 11:50:52,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 454 transitions, 6342 flow [2024-06-14 11:50:54,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 454 transitions, 6069 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-06-14 11:50:54,158 INFO L231 Difference]: Finished difference. Result has 312 places, 418 transitions, 4949 flow [2024-06-14 11:50:54,158 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4460, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4949, PETRI_PLACES=312, PETRI_TRANSITIONS=418} [2024-06-14 11:50:54,158 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 267 predicate places. [2024-06-14 11:50:54,158 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 418 transitions, 4949 flow [2024-06-14 11:50:54,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:50:54,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:50:54,159 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 11:50:54,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-14 11:50:54,159 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:50:54,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:50:54,159 INFO L85 PathProgramCache]: Analyzing trace with hash -1282989482, now seen corresponding path program 11 times [2024-06-14 11:50:54,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:50:54,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439089545] [2024-06-14 11:50:54,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:50:54,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:50:54,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:50:55,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:50:55,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:50:55,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439089545] [2024-06-14 11:50:55,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439089545] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:50:55,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:50:55,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 11:50:55,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401547644] [2024-06-14 11:50:55,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:50:55,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 11:50:55,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:50:55,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 11:50:55,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-06-14 11:50:55,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:50:55,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 418 transitions, 4949 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:50:55,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:50:55,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:50:55,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:50:57,145 INFO L124 PetriNetUnfolderBase]: 3970/6363 cut-off events. [2024-06-14 11:50:57,145 INFO L125 PetriNetUnfolderBase]: For 1153152/1153164 co-relation queries the response was YES. [2024-06-14 11:50:57,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61570 conditions, 6363 events. 3970/6363 cut-off events. For 1153152/1153164 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 39026 event pairs, 803 based on Foata normal form. 12/6362 useless extension candidates. Maximal degree in co-relation 61429. Up to 5623 conditions per place. [2024-06-14 11:50:57,237 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 331 selfloop transitions, 118 changer transitions 0/454 dead transitions. [2024-06-14 11:50:57,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 454 transitions, 6115 flow [2024-06-14 11:50:57,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:50:57,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:50:57,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 195 transitions. [2024-06-14 11:50:57,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-06-14 11:50:57,239 INFO L175 Difference]: Start difference. First operand has 312 places, 418 transitions, 4949 flow. Second operand 10 states and 195 transitions. [2024-06-14 11:50:57,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 454 transitions, 6115 flow [2024-06-14 11:50:59,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 454 transitions, 5817 flow, removed 80 selfloop flow, removed 6 redundant places. [2024-06-14 11:50:59,739 INFO L231 Difference]: Finished difference. Result has 317 places, 421 transitions, 5039 flow [2024-06-14 11:50:59,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4677, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5039, PETRI_PLACES=317, PETRI_TRANSITIONS=421} [2024-06-14 11:50:59,739 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 272 predicate places. [2024-06-14 11:50:59,740 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 421 transitions, 5039 flow [2024-06-14 11:50:59,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:50:59,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:50:59,740 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 11:50:59,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-14 11:50:59,740 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:50:59,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:50:59,741 INFO L85 PathProgramCache]: Analyzing trace with hash -1476928892, now seen corresponding path program 12 times [2024-06-14 11:50:59,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:50:59,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492973095] [2024-06-14 11:50:59,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:50:59,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:50:59,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:51:00,948 INFO 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 11:51:00,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:51:00,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492973095] [2024-06-14 11:51:00,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492973095] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:51:00,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:51:00,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 11:51:00,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116761533] [2024-06-14 11:51:00,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:51:00,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 11:51:00,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:51:00,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 11:51:00,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-06-14 11:51:01,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:51:01,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 421 transitions, 5039 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:51:01,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:51:01,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:51:01,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:51:02,787 INFO L124 PetriNetUnfolderBase]: 3962/6361 cut-off events. [2024-06-14 11:51:02,787 INFO L125 PetriNetUnfolderBase]: For 1152892/1152904 co-relation queries the response was YES. [2024-06-14 11:51:02,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61278 conditions, 6361 events. 3962/6361 cut-off events. For 1152892/1152904 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 39139 event pairs, 814 based on Foata normal form. 12/6360 useless extension candidates. Maximal degree in co-relation 61134. Up to 5611 conditions per place. [2024-06-14 11:51:02,877 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 329 selfloop transitions, 121 changer transitions 0/455 dead transitions. [2024-06-14 11:51:02,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 455 transitions, 6084 flow [2024-06-14 11:51:02,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:51:02,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:51:02,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-14 11:51:02,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43863636363636366 [2024-06-14 11:51:02,879 INFO L175 Difference]: Start difference. First operand has 317 places, 421 transitions, 5039 flow. Second operand 10 states and 193 transitions. [2024-06-14 11:51:02,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 455 transitions, 6084 flow [2024-06-14 11:51:04,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 455 transitions, 5681 flow, removed 86 selfloop flow, removed 7 redundant places. [2024-06-14 11:51:04,566 INFO L231 Difference]: Finished difference. Result has 320 places, 421 transitions, 4885 flow [2024-06-14 11:51:04,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4636, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4885, PETRI_PLACES=320, PETRI_TRANSITIONS=421} [2024-06-14 11:51:04,566 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 275 predicate places. [2024-06-14 11:51:04,567 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 421 transitions, 4885 flow [2024-06-14 11:51:04,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:51:04,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:51:04,567 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 11:51:04,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-14 11:51:04,567 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:51:04,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:51:04,568 INFO L85 PathProgramCache]: Analyzing trace with hash 2073658118, now seen corresponding path program 13 times [2024-06-14 11:51:04,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:51:04,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391934387] [2024-06-14 11:51:04,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:51:04,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:51:04,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:51:05,752 INFO 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 11:51:05,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:51:05,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391934387] [2024-06-14 11:51:05,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391934387] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:51:05,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:51:05,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 11:51:05,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784900842] [2024-06-14 11:51:05,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:51:05,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 11:51:05,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:51:05,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 11:51:05,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-14 11:51:05,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:51:05,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 421 transitions, 4885 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:51:05,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:51:05,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:51:05,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:51:07,539 INFO L124 PetriNetUnfolderBase]: 3979/6398 cut-off events. [2024-06-14 11:51:07,539 INFO L125 PetriNetUnfolderBase]: For 1172582/1172594 co-relation queries the response was YES. [2024-06-14 11:51:07,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61486 conditions, 6398 events. 3979/6398 cut-off events. For 1172582/1172594 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 39569 event pairs, 741 based on Foata normal form. 12/6397 useless extension candidates. Maximal degree in co-relation 61341. Up to 5255 conditions per place. [2024-06-14 11:51:07,633 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 290 selfloop transitions, 166 changer transitions 0/461 dead transitions. [2024-06-14 11:51:07,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 461 transitions, 6522 flow [2024-06-14 11:51:07,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:51:07,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:51:07,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 195 transitions. [2024-06-14 11:51:07,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-06-14 11:51:07,635 INFO L175 Difference]: Start difference. First operand has 320 places, 421 transitions, 4885 flow. Second operand 10 states and 195 transitions. [2024-06-14 11:51:07,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 461 transitions, 6522 flow [2024-06-14 11:51:09,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 461 transitions, 6234 flow, removed 7 selfloop flow, removed 11 redundant places. [2024-06-14 11:51:09,734 INFO L231 Difference]: Finished difference. Result has 319 places, 425 transitions, 5180 flow [2024-06-14 11:51:09,734 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4597, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5180, PETRI_PLACES=319, PETRI_TRANSITIONS=425} [2024-06-14 11:51:09,748 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 274 predicate places. [2024-06-14 11:51:09,748 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 425 transitions, 5180 flow [2024-06-14 11:51:09,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:51:09,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:51:09,749 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 11:51:09,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-14 11:51:09,749 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:51:09,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:51:09,750 INFO L85 PathProgramCache]: Analyzing trace with hash -2105764804, now seen corresponding path program 14 times [2024-06-14 11:51:09,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:51:09,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481957276] [2024-06-14 11:51:09,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:51:09,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:51:09,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:51:11,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:51:11,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:51:11,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481957276] [2024-06-14 11:51:11,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481957276] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:51:11,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:51:11,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 11:51:11,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901302430] [2024-06-14 11:51:11,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:51:11,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 11:51:11,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:51:11,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 11:51:11,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-14 11:51:11,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:51:11,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 425 transitions, 5180 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:51:11,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:51:11,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:51:11,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:51:13,528 INFO L124 PetriNetUnfolderBase]: 3996/6405 cut-off events. [2024-06-14 11:51:13,528 INFO L125 PetriNetUnfolderBase]: For 1201274/1201286 co-relation queries the response was YES. [2024-06-14 11:51:13,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62399 conditions, 6405 events. 3996/6405 cut-off events. For 1201274/1201286 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 39381 event pairs, 811 based on Foata normal form. 12/6404 useless extension candidates. Maximal degree in co-relation 62255. Up to 5665 conditions per place. [2024-06-14 11:51:13,628 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 327 selfloop transitions, 127 changer transitions 0/459 dead transitions. [2024-06-14 11:51:13,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 459 transitions, 6341 flow [2024-06-14 11:51:13,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:51:13,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:51:13,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-14 11:51:13,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43863636363636366 [2024-06-14 11:51:13,656 INFO L175 Difference]: Start difference. First operand has 319 places, 425 transitions, 5180 flow. Second operand 10 states and 193 transitions. [2024-06-14 11:51:13,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 459 transitions, 6341 flow [2024-06-14 11:51:16,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 459 transitions, 6008 flow, removed 82 selfloop flow, removed 6 redundant places. [2024-06-14 11:51:16,394 INFO L231 Difference]: Finished difference. Result has 323 places, 427 transitions, 5236 flow [2024-06-14 11:51:16,394 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4867, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5236, PETRI_PLACES=323, PETRI_TRANSITIONS=427} [2024-06-14 11:51:16,395 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 278 predicate places. [2024-06-14 11:51:16,395 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 427 transitions, 5236 flow [2024-06-14 11:51:16,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:51:16,395 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:51:16,395 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 11:51:16,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-14 11:51:16,395 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:51:16,395 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:51:16,395 INFO L85 PathProgramCache]: Analyzing trace with hash -2105496034, now seen corresponding path program 15 times [2024-06-14 11:51:16,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:51:16,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742109384] [2024-06-14 11:51:16,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:51:16,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:51:16,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:51:17,832 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 11:51:17,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:51:17,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742109384] [2024-06-14 11:51:17,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742109384] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:51:17,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:51:17,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 11:51:17,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602535321] [2024-06-14 11:51:17,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:51:17,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 11:51:17,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:51:17,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 11:51:17,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-14 11:51:17,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:51:17,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 427 transitions, 5236 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:51:17,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:51:17,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:51:17,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:51:19,906 INFO L124 PetriNetUnfolderBase]: 3988/6393 cut-off events. [2024-06-14 11:51:19,907 INFO L125 PetriNetUnfolderBase]: For 1196433/1196445 co-relation queries the response was YES. [2024-06-14 11:51:19,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61734 conditions, 6393 events. 3988/6393 cut-off events. For 1196433/1196445 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 39262 event pairs, 804 based on Foata normal form. 12/6392 useless extension candidates. Maximal degree in co-relation 61588. Up to 5594 conditions per place. [2024-06-14 11:51:19,991 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 323 selfloop transitions, 132 changer transitions 0/460 dead transitions. [2024-06-14 11:51:19,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 460 transitions, 6277 flow [2024-06-14 11:51:19,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:51:19,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:51:19,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 194 transitions. [2024-06-14 11:51:19,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4409090909090909 [2024-06-14 11:51:19,993 INFO L175 Difference]: Start difference. First operand has 323 places, 427 transitions, 5236 flow. Second operand 10 states and 194 transitions. [2024-06-14 11:51:19,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 460 transitions, 6277 flow [2024-06-14 11:51:23,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 460 transitions, 5850 flow, removed 73 selfloop flow, removed 7 redundant places. [2024-06-14 11:51:23,024 INFO L231 Difference]: Finished difference. Result has 326 places, 427 transitions, 5080 flow [2024-06-14 11:51:23,024 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4809, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5080, PETRI_PLACES=326, PETRI_TRANSITIONS=427} [2024-06-14 11:51:23,024 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 281 predicate places. [2024-06-14 11:51:23,024 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 427 transitions, 5080 flow [2024-06-14 11:51:23,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:51:23,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:51:23,025 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 11:51:23,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-14 11:51:23,025 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 11:51:23,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:51:23,025 INFO L85 PathProgramCache]: Analyzing trace with hash 543379871, now seen corresponding path program 2 times [2024-06-14 11:51:23,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:51:23,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352765281] [2024-06-14 11:51:23,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:51:23,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:51:23,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:51:24,444 INFO 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 11:51:24,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:51:24,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352765281] [2024-06-14 11:51:24,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352765281] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:51:24,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:51:24,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:51:24,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781597912] [2024-06-14 11:51:24,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:51:24,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:51:24,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:51:24,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:51:24,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:51:24,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-14 11:51:24,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 427 transitions, 5080 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:51:24,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:51:24,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-14 11:51:24,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:51:26,161 INFO L124 PetriNetUnfolderBase]: 3623/5998 cut-off events. [2024-06-14 11:51:26,161 INFO L125 PetriNetUnfolderBase]: For 1206906/1206918 co-relation queries the response was YES. [2024-06-14 11:51:26,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58892 conditions, 5998 events. 3623/5998 cut-off events. For 1206906/1206918 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 38657 event pairs, 792 based on Foata normal form. 5/5939 useless extension candidates. Maximal degree in co-relation 58745. Up to 5197 conditions per place. [2024-06-14 11:51:26,248 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 323 selfloop transitions, 31 changer transitions 0/440 dead transitions. [2024-06-14 11:51:26,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 440 transitions, 5890 flow [2024-06-14 11:51:26,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:51:26,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:51:26,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-14 11:51:26,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41919191919191917 [2024-06-14 11:51:26,250 INFO L175 Difference]: Start difference. First operand has 326 places, 427 transitions, 5080 flow. Second operand 9 states and 166 transitions. [2024-06-14 11:51:26,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 440 transitions, 5890 flow [2024-06-14 11:51:28,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 440 transitions, 5334 flow, removed 25 selfloop flow, removed 11 redundant places. [2024-06-14 11:51:28,953 INFO L231 Difference]: Finished difference. Result has 324 places, 430 transitions, 4670 flow [2024-06-14 11:51:28,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4524, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4670, PETRI_PLACES=324, PETRI_TRANSITIONS=430} [2024-06-14 11:51:28,953 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 279 predicate places. [2024-06-14 11:51:28,953 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 430 transitions, 4670 flow [2024-06-14 11:51:28,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:51:28,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:51:28,954 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 11:51:28,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-14 11:51:28,954 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 11:51:28,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:51:28,954 INFO L85 PathProgramCache]: Analyzing trace with hash 543379406, now seen corresponding path program 4 times [2024-06-14 11:51:28,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:51:28,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290613670] [2024-06-14 11:51:28,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:51:28,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:51:28,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:51:30,361 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 11:51:30,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:51:30,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290613670] [2024-06-14 11:51:30,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290613670] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:51:30,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:51:30,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:51:30,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170336179] [2024-06-14 11:51:30,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:51:30,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:51:30,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:51:30,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:51:30,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:51:30,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-14 11:51:30,516 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 430 transitions, 4670 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:51:30,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:51:30,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-14 11:51:30,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:51:31,823 INFO L124 PetriNetUnfolderBase]: 3648/6027 cut-off events. [2024-06-14 11:51:31,823 INFO L125 PetriNetUnfolderBase]: For 1242239/1242261 co-relation queries the response was YES. [2024-06-14 11:51:31,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58624 conditions, 6027 events. 3648/6027 cut-off events. For 1242239/1242261 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 38726 event pairs, 797 based on Foata normal form. 10/5958 useless extension candidates. Maximal degree in co-relation 58478. Up to 5120 conditions per place. [2024-06-14 11:51:31,909 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 280 selfloop transitions, 81 changer transitions 0/447 dead transitions. [2024-06-14 11:51:31,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 447 transitions, 5772 flow [2024-06-14 11:51:31,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:51:31,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:51:31,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-14 11:51:31,910 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4460227272727273 [2024-06-14 11:51:31,910 INFO L175 Difference]: Start difference. First operand has 324 places, 430 transitions, 4670 flow. Second operand 8 states and 157 transitions. [2024-06-14 11:51:31,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 447 transitions, 5772 flow [2024-06-14 11:51:34,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 447 transitions, 5648 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-14 11:51:34,542 INFO L231 Difference]: Finished difference. Result has 325 places, 436 transitions, 4856 flow [2024-06-14 11:51:34,542 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4546, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=352, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4856, PETRI_PLACES=325, PETRI_TRANSITIONS=436} [2024-06-14 11:51:34,543 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 280 predicate places. [2024-06-14 11:51:34,543 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 436 transitions, 4856 flow [2024-06-14 11:51:34,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:51:34,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:51:34,543 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 11:51:34,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-14 11:51:34,543 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 11:51:34,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:51:34,544 INFO L85 PathProgramCache]: Analyzing trace with hash 543366386, now seen corresponding path program 5 times [2024-06-14 11:51:34,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:51:34,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515648250] [2024-06-14 11:51:34,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:51:34,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:51:34,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:51:36,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:51:36,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:51:36,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515648250] [2024-06-14 11:51:36,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515648250] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:51:36,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:51:36,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:51:36,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98701613] [2024-06-14 11:51:36,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:51:36,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:51:36,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:51:36,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:51:36,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:51:36,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-14 11:51:36,112 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 436 transitions, 4856 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:51:36,112 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:51:36,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-14 11:51:36,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:51:37,413 INFO L124 PetriNetUnfolderBase]: 3644/6020 cut-off events. [2024-06-14 11:51:37,413 INFO L125 PetriNetUnfolderBase]: For 1256925/1256947 co-relation queries the response was YES. [2024-06-14 11:51:37,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59077 conditions, 6020 events. 3644/6020 cut-off events. For 1256925/1256947 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 38650 event pairs, 796 based on Foata normal form. 9/5951 useless extension candidates. Maximal degree in co-relation 58930. Up to 5123 conditions per place. [2024-06-14 11:51:37,502 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 284 selfloop transitions, 76 changer transitions 0/446 dead transitions. [2024-06-14 11:51:37,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 446 transitions, 5606 flow [2024-06-14 11:51:37,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:51:37,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:51:37,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-14 11:51:37,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-14 11:51:37,503 INFO L175 Difference]: Start difference. First operand has 325 places, 436 transitions, 4856 flow. Second operand 8 states and 154 transitions. [2024-06-14 11:51:37,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 446 transitions, 5606 flow [2024-06-14 11:51:39,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 446 transitions, 5396 flow, removed 60 selfloop flow, removed 4 redundant places. [2024-06-14 11:51:39,786 INFO L231 Difference]: Finished difference. Result has 329 places, 436 transitions, 4804 flow [2024-06-14 11:51:39,787 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4646, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4804, PETRI_PLACES=329, PETRI_TRANSITIONS=436} [2024-06-14 11:51:39,787 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 284 predicate places. [2024-06-14 11:51:39,787 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 436 transitions, 4804 flow [2024-06-14 11:51:39,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:51:39,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:51:39,787 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 11:51:39,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-14 11:51:39,788 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 11:51:39,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:51:39,788 INFO L85 PathProgramCache]: Analyzing trace with hash 558112001, now seen corresponding path program 3 times [2024-06-14 11:51:39,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:51:39,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900694658] [2024-06-14 11:51:39,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:51:39,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:51:39,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:51:41,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:51:41,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:51:41,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900694658] [2024-06-14 11:51:41,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900694658] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:51:41,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:51:41,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:51:41,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535967516] [2024-06-14 11:51:41,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:51:41,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:51:41,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:51:41,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:51:41,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:51:41,206 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-14 11:51:41,206 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 436 transitions, 4804 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:51:41,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:51:41,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-14 11:51:41,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:51:42,790 INFO L124 PetriNetUnfolderBase]: 3636/6026 cut-off events. [2024-06-14 11:51:42,790 INFO L125 PetriNetUnfolderBase]: For 1290170/1290186 co-relation queries the response was YES. [2024-06-14 11:51:42,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59514 conditions, 6026 events. 3636/6026 cut-off events. For 1290170/1290186 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 39013 event pairs, 789 based on Foata normal form. 6/5968 useless extension candidates. Maximal degree in co-relation 59365. Up to 5195 conditions per place. [2024-06-14 11:51:42,907 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 327 selfloop transitions, 47 changer transitions 0/460 dead transitions. [2024-06-14 11:51:42,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 460 transitions, 6288 flow [2024-06-14 11:51:42,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:51:42,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:51:42,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-14 11:51:42,908 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-14 11:51:42,908 INFO L175 Difference]: Start difference. First operand has 329 places, 436 transitions, 4804 flow. Second operand 8 states and 160 transitions. [2024-06-14 11:51:42,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 460 transitions, 6288 flow [2024-06-14 11:51:45,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 460 transitions, 6128 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-14 11:51:45,959 INFO L231 Difference]: Finished difference. Result has 330 places, 445 transitions, 5002 flow [2024-06-14 11:51:45,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4644, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5002, PETRI_PLACES=330, PETRI_TRANSITIONS=445} [2024-06-14 11:51:45,960 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 285 predicate places. [2024-06-14 11:51:45,960 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 445 transitions, 5002 flow [2024-06-14 11:51:45,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:51:45,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:51:45,960 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 11:51:45,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-14 11:51:45,960 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 11:51:45,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:51:45,961 INFO L85 PathProgramCache]: Analyzing trace with hash 558111536, now seen corresponding path program 6 times [2024-06-14 11:51:45,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:51:45,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428507073] [2024-06-14 11:51:45,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:51:45,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:51:45,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:51:47,365 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 11:51:47,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:51:47,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428507073] [2024-06-14 11:51:47,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428507073] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:51:47,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:51:47,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:51:47,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521469554] [2024-06-14 11:51:47,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:51:47,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:51:47,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:51:47,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:51:47,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:51:47,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-14 11:51:47,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 445 transitions, 5002 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:51:47,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:51:47,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-14 11:51:47,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:51:48,964 INFO L124 PetriNetUnfolderBase]: 3635/6016 cut-off events. [2024-06-14 11:51:48,964 INFO L125 PetriNetUnfolderBase]: For 1302824/1302834 co-relation queries the response was YES. [2024-06-14 11:51:49,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59649 conditions, 6016 events. 3635/6016 cut-off events. For 1302824/1302834 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 38821 event pairs, 796 based on Foata normal form. 10/5948 useless extension candidates. Maximal degree in co-relation 59499. Up to 5091 conditions per place. [2024-06-14 11:51:49,054 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 273 selfloop transitions, 99 changer transitions 0/458 dead transitions. [2024-06-14 11:51:49,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 458 transitions, 5852 flow [2024-06-14 11:51:49,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:51:49,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:51:49,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-14 11:51:49,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-06-14 11:51:49,055 INFO L175 Difference]: Start difference. First operand has 330 places, 445 transitions, 5002 flow. Second operand 8 states and 156 transitions. [2024-06-14 11:51:49,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 458 transitions, 5852 flow [2024-06-14 11:51:51,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 458 transitions, 5735 flow, removed 45 selfloop flow, removed 3 redundant places. [2024-06-14 11:51:51,578 INFO L231 Difference]: Finished difference. Result has 335 places, 448 transitions, 5171 flow [2024-06-14 11:51:51,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4885, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5171, PETRI_PLACES=335, PETRI_TRANSITIONS=448} [2024-06-14 11:51:51,579 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 290 predicate places. [2024-06-14 11:51:51,579 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 448 transitions, 5171 flow [2024-06-14 11:51:51,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:51:51,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:51:51,579 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 11:51:51,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-14 11:51:51,580 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 11:51:51,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:51:51,580 INFO L85 PathProgramCache]: Analyzing trace with hash 558616991, now seen corresponding path program 4 times [2024-06-14 11:51:51,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:51:51,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390030786] [2024-06-14 11:51:51,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:51:51,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:51:51,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:51:53,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:51:53,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:51:53,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390030786] [2024-06-14 11:51:53,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390030786] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:51:53,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:51:53,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:51:53,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34835008] [2024-06-14 11:51:53,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:51:53,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:51:53,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:51:53,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:51:53,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:51:53,138 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-14 11:51:53,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 448 transitions, 5171 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:51:53,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:51:53,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-14 11:51:53,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:51:54,623 INFO L124 PetriNetUnfolderBase]: 3618/5997 cut-off events. [2024-06-14 11:51:54,623 INFO L125 PetriNetUnfolderBase]: For 1312582/1312590 co-relation queries the response was YES. [2024-06-14 11:51:54,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59899 conditions, 5997 events. 3618/5997 cut-off events. For 1312582/1312590 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 38835 event pairs, 803 based on Foata normal form. 2/5935 useless extension candidates. Maximal degree in co-relation 59747. Up to 5242 conditions per place. [2024-06-14 11:51:54,733 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 356 selfloop transitions, 18 changer transitions 0/460 dead transitions. [2024-06-14 11:51:54,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 460 transitions, 5961 flow [2024-06-14 11:51:54,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:51:54,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:51:54,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-14 11:51:54,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-14 11:51:54,735 INFO L175 Difference]: Start difference. First operand has 335 places, 448 transitions, 5171 flow. Second operand 8 states and 152 transitions. [2024-06-14 11:51:54,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 460 transitions, 5961 flow [2024-06-14 11:51:57,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 460 transitions, 5643 flow, removed 62 selfloop flow, removed 6 redundant places. [2024-06-14 11:51:57,843 INFO L231 Difference]: Finished difference. Result has 337 places, 448 transitions, 4895 flow [2024-06-14 11:51:57,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4853, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4895, PETRI_PLACES=337, PETRI_TRANSITIONS=448} [2024-06-14 11:51:57,844 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 292 predicate places. [2024-06-14 11:51:57,844 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 448 transitions, 4895 flow [2024-06-14 11:51:57,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:51:57,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:51:57,844 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 11:51:57,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-14 11:51:57,844 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 11:51:57,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:51:57,845 INFO L85 PathProgramCache]: Analyzing trace with hash -2090437983, now seen corresponding path program 7 times [2024-06-14 11:51:57,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:51:57,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570517889] [2024-06-14 11:51:57,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:51:57,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:51:57,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:51:58,756 INFO 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 11:51:58,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:51:58,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570517889] [2024-06-14 11:51:58,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570517889] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:51:58,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:51:58,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:51:58,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033170009] [2024-06-14 11:51:58,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:51:58,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:51:58,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:51:58,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:51:58,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:51:58,810 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:51:58,810 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 448 transitions, 4895 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:51:58,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:51:58,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:51:58,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:52:00,324 INFO L124 PetriNetUnfolderBase]: 4028/6466 cut-off events. [2024-06-14 11:52:00,325 INFO L125 PetriNetUnfolderBase]: For 1315815/1315820 co-relation queries the response was YES. [2024-06-14 11:52:00,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62755 conditions, 6466 events. 4028/6466 cut-off events. For 1315815/1315820 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 40013 event pairs, 823 based on Foata normal form. 5/6467 useless extension candidates. Maximal degree in co-relation 62602. Up to 6095 conditions per place. [2024-06-14 11:52:00,414 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 427 selfloop transitions, 44 changer transitions 0/476 dead transitions. [2024-06-14 11:52:00,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 476 transitions, 5989 flow [2024-06-14 11:52:00,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:52:00,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:52:00,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-14 11:52:00,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-14 11:52:00,415 INFO L175 Difference]: Start difference. First operand has 337 places, 448 transitions, 4895 flow. Second operand 8 states and 152 transitions. [2024-06-14 11:52:00,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 476 transitions, 5989 flow [2024-06-14 11:52:03,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 476 transitions, 5857 flow, removed 35 selfloop flow, removed 8 redundant places. [2024-06-14 11:52:03,422 INFO L231 Difference]: Finished difference. Result has 338 places, 455 transitions, 4962 flow [2024-06-14 11:52:03,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4763, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=407, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4962, PETRI_PLACES=338, PETRI_TRANSITIONS=455} [2024-06-14 11:52:03,423 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 293 predicate places. [2024-06-14 11:52:03,423 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 455 transitions, 4962 flow [2024-06-14 11:52:03,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:03,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:52:03,423 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 11:52:03,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-14 11:52:03,423 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 11:52:03,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:52:03,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1567208097, now seen corresponding path program 1 times [2024-06-14 11:52:03,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:52:03,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423357552] [2024-06-14 11:52:03,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:52:03,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:52:03,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:52:04,555 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 11:52:04,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:52:04,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423357552] [2024-06-14 11:52:04,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423357552] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:52:04,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:52:04,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:52:04,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502077828] [2024-06-14 11:52:04,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:52:04,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:52:04,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:52:04,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:52:04,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:52:04,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-14 11:52:04,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 455 transitions, 4962 flow. Second operand has 8 states, 8 states have (on average 14.0) internal successors, (112), 8 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:04,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:52:04,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-14 11:52:04,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:52:06,071 INFO L124 PetriNetUnfolderBase]: 3764/6164 cut-off events. [2024-06-14 11:52:06,071 INFO L125 PetriNetUnfolderBase]: For 1342895/1342921 co-relation queries the response was YES. [2024-06-14 11:52:06,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60841 conditions, 6164 events. 3764/6164 cut-off events. For 1342895/1342921 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 39116 event pairs, 782 based on Foata normal form. 27/6140 useless extension candidates. Maximal degree in co-relation 60687. Up to 5511 conditions per place. [2024-06-14 11:52:06,164 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 401 selfloop transitions, 19 changer transitions 0/477 dead transitions. [2024-06-14 11:52:06,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 477 transitions, 5952 flow [2024-06-14 11:52:06,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:52:06,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:52:06,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-14 11:52:06,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-14 11:52:06,165 INFO L175 Difference]: Start difference. First operand has 338 places, 455 transitions, 4962 flow. Second operand 8 states and 160 transitions. [2024-06-14 11:52:06,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 477 transitions, 5952 flow [2024-06-14 11:52:08,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 477 transitions, 5835 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-14 11:52:08,400 INFO L231 Difference]: Finished difference. Result has 340 places, 458 transitions, 4973 flow [2024-06-14 11:52:08,400 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4845, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=455, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=436, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4973, PETRI_PLACES=340, PETRI_TRANSITIONS=458} [2024-06-14 11:52:08,401 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 295 predicate places. [2024-06-14 11:52:08,401 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 458 transitions, 4973 flow [2024-06-14 11:52:08,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.0) internal successors, (112), 8 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:08,401 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:52:08,401 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:52:08,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-14 11:52:08,401 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 11:52:08,402 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:52:08,402 INFO L85 PathProgramCache]: Analyzing trace with hash -1565884677, now seen corresponding path program 1 times [2024-06-14 11:52:08,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:52:08,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125612057] [2024-06-14 11:52:08,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:52:08,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:52:08,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:52:09,717 INFO 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 11:52:09,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:52:09,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125612057] [2024-06-14 11:52:09,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125612057] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:52:09,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:52:09,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:52:09,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732353930] [2024-06-14 11:52:09,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:52:09,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:52:09,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:52:09,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:52:09,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:52:09,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-14 11:52:09,811 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 458 transitions, 4973 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:09,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:52:09,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-14 11:52:09,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:52:11,271 INFO L124 PetriNetUnfolderBase]: 3778/6186 cut-off events. [2024-06-14 11:52:11,271 INFO L125 PetriNetUnfolderBase]: For 1391472/1391502 co-relation queries the response was YES. [2024-06-14 11:52:11,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61637 conditions, 6186 events. 3778/6186 cut-off events. For 1391472/1391502 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 39352 event pairs, 781 based on Foata normal form. 30/6164 useless extension candidates. Maximal degree in co-relation 61482. Up to 5531 conditions per place. [2024-06-14 11:52:11,367 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 402 selfloop transitions, 20 changer transitions 0/479 dead transitions. [2024-06-14 11:52:11,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 479 transitions, 5949 flow [2024-06-14 11:52:11,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:52:11,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:52:11,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-14 11:52:11,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-14 11:52:11,368 INFO L175 Difference]: Start difference. First operand has 340 places, 458 transitions, 4973 flow. Second operand 9 states and 171 transitions. [2024-06-14 11:52:11,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 479 transitions, 5949 flow [2024-06-14 11:52:14,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 479 transitions, 5809 flow, removed 36 selfloop flow, removed 7 redundant places. [2024-06-14 11:52:14,297 INFO L231 Difference]: Finished difference. Result has 342 places, 462 transitions, 4954 flow [2024-06-14 11:52:14,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4833, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=458, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=438, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4954, PETRI_PLACES=342, PETRI_TRANSITIONS=462} [2024-06-14 11:52:14,297 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 297 predicate places. [2024-06-14 11:52:14,297 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 462 transitions, 4954 flow [2024-06-14 11:52:14,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:14,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:52:14,298 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:52:14,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-14 11:52:14,298 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 11:52:14,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:52:14,298 INFO L85 PathProgramCache]: Analyzing trace with hash -807424339, now seen corresponding path program 2 times [2024-06-14 11:52:14,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:52:14,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849636077] [2024-06-14 11:52:14,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:52:14,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:52:14,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:52:15,496 INFO 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 11:52:15,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:52:15,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849636077] [2024-06-14 11:52:15,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849636077] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:52:15,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:52:15,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:52:15,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434789614] [2024-06-14 11:52:15,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:52:15,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:52:15,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:52:15,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:52:15,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:52:15,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-14 11:52:15,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 462 transitions, 4954 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:15,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:52:15,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-14 11:52:15,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:52:17,047 INFO L124 PetriNetUnfolderBase]: 3822/6252 cut-off events. [2024-06-14 11:52:17,048 INFO L125 PetriNetUnfolderBase]: For 1442590/1442620 co-relation queries the response was YES. [2024-06-14 11:52:17,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63622 conditions, 6252 events. 3822/6252 cut-off events. For 1442590/1442620 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 39689 event pairs, 782 based on Foata normal form. 28/6229 useless extension candidates. Maximal degree in co-relation 63467. Up to 5542 conditions per place. [2024-06-14 11:52:17,140 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 397 selfloop transitions, 32 changer transitions 0/486 dead transitions. [2024-06-14 11:52:17,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 486 transitions, 6246 flow [2024-06-14 11:52:17,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:52:17,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:52:17,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-14 11:52:17,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45738636363636365 [2024-06-14 11:52:17,142 INFO L175 Difference]: Start difference. First operand has 342 places, 462 transitions, 4954 flow. Second operand 8 states and 161 transitions. [2024-06-14 11:52:17,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 486 transitions, 6246 flow [2024-06-14 11:52:20,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 486 transitions, 6153 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-14 11:52:20,047 INFO L231 Difference]: Finished difference. Result has 344 places, 469 transitions, 5088 flow [2024-06-14 11:52:20,047 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4861, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=433, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5088, PETRI_PLACES=344, PETRI_TRANSITIONS=469} [2024-06-14 11:52:20,048 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 299 predicate places. [2024-06-14 11:52:20,048 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 469 transitions, 5088 flow [2024-06-14 11:52:20,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:20,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:52:20,048 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 11:52:20,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-14 11:52:20,048 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 11:52:20,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:52:20,049 INFO L85 PathProgramCache]: Analyzing trace with hash -1561243047, now seen corresponding path program 3 times [2024-06-14 11:52:20,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:52:20,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974681817] [2024-06-14 11:52:20,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:52:20,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:52:20,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:52:21,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:52:21,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:52:21,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974681817] [2024-06-14 11:52:21,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974681817] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:52:21,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:52:21,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:52:21,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492850066] [2024-06-14 11:52:21,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:52:21,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:52:21,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:52:21,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:52:21,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:52:21,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-14 11:52:21,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 469 transitions, 5088 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:21,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:52:21,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-14 11:52:21,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:52:22,761 INFO L124 PetriNetUnfolderBase]: 3820/6250 cut-off events. [2024-06-14 11:52:22,761 INFO L125 PetriNetUnfolderBase]: For 1472689/1472717 co-relation queries the response was YES. [2024-06-14 11:52:22,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64424 conditions, 6250 events. 3820/6250 cut-off events. For 1472689/1472717 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 39682 event pairs, 784 based on Foata normal form. 33/6230 useless extension candidates. Maximal degree in co-relation 64267. Up to 5574 conditions per place. [2024-06-14 11:52:22,857 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 408 selfloop transitions, 24 changer transitions 0/489 dead transitions. [2024-06-14 11:52:22,857 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 489 transitions, 6122 flow [2024-06-14 11:52:22,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:52:22,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:52:22,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-14 11:52:22,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45170454545454547 [2024-06-14 11:52:22,858 INFO L175 Difference]: Start difference. First operand has 344 places, 469 transitions, 5088 flow. Second operand 8 states and 159 transitions. [2024-06-14 11:52:22,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 489 transitions, 6122 flow [2024-06-14 11:52:25,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 489 transitions, 6025 flow, removed 37 selfloop flow, removed 4 redundant places. [2024-06-14 11:52:25,561 INFO L231 Difference]: Finished difference. Result has 348 places, 473 transitions, 5144 flow [2024-06-14 11:52:25,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5005, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=469, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5144, PETRI_PLACES=348, PETRI_TRANSITIONS=473} [2024-06-14 11:52:25,561 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 303 predicate places. [2024-06-14 11:52:25,562 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 473 transitions, 5144 flow [2024-06-14 11:52:25,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:25,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:52:25,562 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 11:52:25,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-14 11:52:25,562 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 11:52:25,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:52:25,563 INFO L85 PathProgramCache]: Analyzing trace with hash -634940959, now seen corresponding path program 4 times [2024-06-14 11:52:25,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:52:25,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529968978] [2024-06-14 11:52:25,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:52:25,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:52:25,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:52:26,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:52:26,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:52:26,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529968978] [2024-06-14 11:52:26,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529968978] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:52:26,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:52:26,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:52:26,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611243921] [2024-06-14 11:52:26,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:52:26,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:52:26,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:52:26,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:52:26,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:52:26,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-14 11:52:26,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 473 transitions, 5144 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:26,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:52:26,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-14 11:52:26,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:52:28,346 INFO L124 PetriNetUnfolderBase]: 3844/6287 cut-off events. [2024-06-14 11:52:28,346 INFO L125 PetriNetUnfolderBase]: For 1505017/1505052 co-relation queries the response was YES. [2024-06-14 11:52:28,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65075 conditions, 6287 events. 3844/6287 cut-off events. For 1505017/1505052 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 39987 event pairs, 794 based on Foata normal form. 33/6265 useless extension candidates. Maximal degree in co-relation 64916. Up to 5596 conditions per place. [2024-06-14 11:52:28,450 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 402 selfloop transitions, 31 changer transitions 0/490 dead transitions. [2024-06-14 11:52:28,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 490 transitions, 6164 flow [2024-06-14 11:52:28,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:52:28,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:52:28,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-14 11:52:28,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44886363636363635 [2024-06-14 11:52:28,451 INFO L175 Difference]: Start difference. First operand has 348 places, 473 transitions, 5144 flow. Second operand 8 states and 158 transitions. [2024-06-14 11:52:28,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 490 transitions, 6164 flow [2024-06-14 11:52:31,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 490 transitions, 6071 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-14 11:52:31,408 INFO L231 Difference]: Finished difference. Result has 350 places, 477 transitions, 5216 flow [2024-06-14 11:52:31,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5051, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=442, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5216, PETRI_PLACES=350, PETRI_TRANSITIONS=477} [2024-06-14 11:52:31,408 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 305 predicate places. [2024-06-14 11:52:31,409 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 477 transitions, 5216 flow [2024-06-14 11:52:31,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:31,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:52:31,409 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 11:52:31,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-14 11:52:31,409 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 11:52:31,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:52:31,410 INFO L85 PathProgramCache]: Analyzing trace with hash 550052807, now seen corresponding path program 5 times [2024-06-14 11:52:31,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:52:31,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946485749] [2024-06-14 11:52:31,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:52:31,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:52:31,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:52:32,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:52:32,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:52:32,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946485749] [2024-06-14 11:52:32,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946485749] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:52:32,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:52:32,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:52:32,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112466569] [2024-06-14 11:52:32,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:52:32,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:52:32,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:52:32,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:52:32,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:52:33,138 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-14 11:52:33,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 477 transitions, 5216 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:33,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:52:33,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-14 11:52:33,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:52:34,539 INFO L124 PetriNetUnfolderBase]: 3848/6303 cut-off events. [2024-06-14 11:52:34,540 INFO L125 PetriNetUnfolderBase]: For 1496906/1496941 co-relation queries the response was YES. [2024-06-14 11:52:34,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65855 conditions, 6303 events. 3848/6303 cut-off events. For 1496906/1496941 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 40235 event pairs, 790 based on Foata normal form. 28/6277 useless extension candidates. Maximal degree in co-relation 65695. Up to 5602 conditions per place. [2024-06-14 11:52:34,632 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 406 selfloop transitions, 35 changer transitions 0/498 dead transitions. [2024-06-14 11:52:34,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 498 transitions, 6321 flow [2024-06-14 11:52:34,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:52:34,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:52:34,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-14 11:52:34,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45170454545454547 [2024-06-14 11:52:34,634 INFO L175 Difference]: Start difference. First operand has 350 places, 477 transitions, 5216 flow. Second operand 8 states and 159 transitions. [2024-06-14 11:52:34,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 498 transitions, 6321 flow [2024-06-14 11:52:37,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 498 transitions, 6125 flow, removed 68 selfloop flow, removed 6 redundant places. [2024-06-14 11:52:37,648 INFO L231 Difference]: Finished difference. Result has 353 places, 486 transitions, 5281 flow [2024-06-14 11:52:37,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5085, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=477, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=443, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5281, PETRI_PLACES=353, PETRI_TRANSITIONS=486} [2024-06-14 11:52:37,649 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 308 predicate places. [2024-06-14 11:52:37,649 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 486 transitions, 5281 flow [2024-06-14 11:52:37,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:37,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:52:37,649 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 11:52:37,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-14 11:52:37,650 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 11:52:37,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:52:37,650 INFO L85 PathProgramCache]: Analyzing trace with hash 558327017, now seen corresponding path program 6 times [2024-06-14 11:52:37,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:52:37,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238580615] [2024-06-14 11:52:37,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:52:37,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:52:37,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:52:38,971 INFO 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 11:52:38,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:52:38,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238580615] [2024-06-14 11:52:38,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238580615] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:52:38,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:52:38,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:52:38,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113057032] [2024-06-14 11:52:38,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:52:38,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:52:38,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:52:38,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:52:38,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:52:39,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-14 11:52:39,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 486 transitions, 5281 flow. Second operand has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:39,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:52:39,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-14 11:52:39,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:52:40,565 INFO L124 PetriNetUnfolderBase]: 3847/6302 cut-off events. [2024-06-14 11:52:40,566 INFO L125 PetriNetUnfolderBase]: For 1515831/1515862 co-relation queries the response was YES. [2024-06-14 11:52:40,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66148 conditions, 6302 events. 3847/6302 cut-off events. For 1515831/1515862 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 40188 event pairs, 785 based on Foata normal form. 30/6278 useless extension candidates. Maximal degree in co-relation 65986. Up to 5519 conditions per place. [2024-06-14 11:52:40,665 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 383 selfloop transitions, 67 changer transitions 0/507 dead transitions. [2024-06-14 11:52:40,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 507 transitions, 6645 flow [2024-06-14 11:52:40,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:52:40,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:52:40,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-06-14 11:52:40,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4602272727272727 [2024-06-14 11:52:40,666 INFO L175 Difference]: Start difference. First operand has 353 places, 486 transitions, 5281 flow. Second operand 8 states and 162 transitions. [2024-06-14 11:52:40,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 507 transitions, 6645 flow [2024-06-14 11:52:43,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 507 transitions, 6546 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-06-14 11:52:43,633 INFO L231 Difference]: Finished difference. Result has 358 places, 492 transitions, 5520 flow [2024-06-14 11:52:43,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5182, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=486, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=422, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5520, PETRI_PLACES=358, PETRI_TRANSITIONS=492} [2024-06-14 11:52:43,633 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 313 predicate places. [2024-06-14 11:52:43,634 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 492 transitions, 5520 flow [2024-06-14 11:52:43,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.777777777777779) internal successors, (124), 9 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:43,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:52:43,634 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 11:52:43,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-14 11:52:43,634 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 11:52:43,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:52:43,635 INFO L85 PathProgramCache]: Analyzing trace with hash 558634847, now seen corresponding path program 1 times [2024-06-14 11:52:43,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:52:43,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151341905] [2024-06-14 11:52:43,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:52:43,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:52:43,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:52:45,644 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 11:52:45,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:52:45,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151341905] [2024-06-14 11:52:45,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151341905] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:52:45,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:52:45,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:52:45,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839430897] [2024-06-14 11:52:45,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:52:45,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:52:45,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:52:45,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:52:45,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:52:45,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-06-14 11:52:45,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 492 transitions, 5520 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:45,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:52:45,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-06-14 11:52:45,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:52:47,347 INFO L124 PetriNetUnfolderBase]: 3542/5921 cut-off events. [2024-06-14 11:52:47,347 INFO L125 PetriNetUnfolderBase]: For 1524518/1524560 co-relation queries the response was YES. [2024-06-14 11:52:47,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64587 conditions, 5921 events. 3542/5921 cut-off events. For 1524518/1524560 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 38797 event pairs, 766 based on Foata normal form. 33/5865 useless extension candidates. Maximal degree in co-relation 64422. Up to 5006 conditions per place. [2024-06-14 11:52:47,434 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 359 selfloop transitions, 20 changer transitions 0/509 dead transitions. [2024-06-14 11:52:47,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 509 transitions, 6427 flow [2024-06-14 11:52:47,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:52:47,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:52:47,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-14 11:52:47,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4393939393939394 [2024-06-14 11:52:47,435 INFO L175 Difference]: Start difference. First operand has 358 places, 492 transitions, 5520 flow. Second operand 9 states and 174 transitions. [2024-06-14 11:52:47,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 509 transitions, 6427 flow [2024-06-14 11:52:50,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 509 transitions, 6310 flow, removed 41 selfloop flow, removed 4 redundant places. [2024-06-14 11:52:50,945 INFO L231 Difference]: Finished difference. Result has 364 places, 497 transitions, 5573 flow [2024-06-14 11:52:50,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5406, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=474, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5573, PETRI_PLACES=364, PETRI_TRANSITIONS=497} [2024-06-14 11:52:50,945 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 319 predicate places. [2024-06-14 11:52:50,945 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 497 transitions, 5573 flow [2024-06-14 11:52:50,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:50,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:52:50,946 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 11:52:50,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-14 11:52:50,946 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 11:52:50,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:52:50,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1901141327, now seen corresponding path program 1 times [2024-06-14 11:52:50,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:52:50,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800760354] [2024-06-14 11:52:50,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:52:50,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:52:50,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:52:51,748 INFO 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 11:52:51,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:52:51,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800760354] [2024-06-14 11:52:51,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800760354] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:52:51,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:52:51,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:52:51,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230362195] [2024-06-14 11:52:51,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:52:51,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:52:51,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:52:51,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:52:51,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:52:51,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:52:51,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 497 transitions, 5573 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:51,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:52:51,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:52:51,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:52:53,673 INFO L124 PetriNetUnfolderBase]: 4145/6642 cut-off events. [2024-06-14 11:52:53,673 INFO L125 PetriNetUnfolderBase]: For 1524868/1524875 co-relation queries the response was YES. [2024-06-14 11:52:53,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69675 conditions, 6642 events. 4145/6642 cut-off events. For 1524868/1524875 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 41114 event pairs, 821 based on Foata normal form. 7/6645 useless extension candidates. Maximal degree in co-relation 69507. Up to 6140 conditions per place. [2024-06-14 11:52:53,773 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 442 selfloop transitions, 78 changer transitions 0/525 dead transitions. [2024-06-14 11:52:53,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 525 transitions, 6805 flow [2024-06-14 11:52:53,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:52:53,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:52:53,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-14 11:52:53,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-14 11:52:53,783 INFO L175 Difference]: Start difference. First operand has 364 places, 497 transitions, 5573 flow. Second operand 8 states and 154 transitions. [2024-06-14 11:52:53,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 525 transitions, 6805 flow [2024-06-14 11:52:56,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 525 transitions, 6684 flow, removed 43 selfloop flow, removed 6 redundant places. [2024-06-14 11:52:56,971 INFO L231 Difference]: Finished difference. Result has 366 places, 500 transitions, 5712 flow [2024-06-14 11:52:56,971 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5452, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=497, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5712, PETRI_PLACES=366, PETRI_TRANSITIONS=500} [2024-06-14 11:52:56,971 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 321 predicate places. [2024-06-14 11:52:56,971 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 500 transitions, 5712 flow [2024-06-14 11:52:56,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:56,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:52:56,972 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 11:52:56,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-14 11:52:56,972 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 11:52:56,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:52:56,972 INFO L85 PathProgramCache]: Analyzing trace with hash 1655007111, now seen corresponding path program 2 times [2024-06-14 11:52:56,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:52:56,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933515619] [2024-06-14 11:52:56,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:52:56,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:52:56,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:52:57,924 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 11:52:57,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:52:57,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933515619] [2024-06-14 11:52:57,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933515619] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:52:57,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:52:57,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:52:57,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688258377] [2024-06-14 11:52:57,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:52:57,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:52:57,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:52:57,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:52:57,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:52:58,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:52:58,055 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 500 transitions, 5712 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:52:58,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:52:58,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:52:58,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:52:59,746 INFO L124 PetriNetUnfolderBase]: 4184/6704 cut-off events. [2024-06-14 11:52:59,746 INFO L125 PetriNetUnfolderBase]: For 1556628/1556640 co-relation queries the response was YES. [2024-06-14 11:52:59,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70986 conditions, 6704 events. 4184/6704 cut-off events. For 1556628/1556640 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 41571 event pairs, 841 based on Foata normal form. 9/6700 useless extension candidates. Maximal degree in co-relation 70817. Up to 6159 conditions per place. [2024-06-14 11:52:59,856 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 445 selfloop transitions, 95 changer transitions 0/545 dead transitions. [2024-06-14 11:52:59,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 545 transitions, 7601 flow [2024-06-14 11:52:59,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:52:59,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:52:59,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-14 11:52:59,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41414141414141414 [2024-06-14 11:52:59,858 INFO L175 Difference]: Start difference. First operand has 366 places, 500 transitions, 5712 flow. Second operand 9 states and 164 transitions. [2024-06-14 11:52:59,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 545 transitions, 7601 flow [2024-06-14 11:53:03,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 545 transitions, 7258 flow, removed 84 selfloop flow, removed 6 redundant places. [2024-06-14 11:53:03,450 INFO L231 Difference]: Finished difference. Result has 370 places, 527 transitions, 6121 flow [2024-06-14 11:53:03,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5478, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=500, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6121, PETRI_PLACES=370, PETRI_TRANSITIONS=527} [2024-06-14 11:53:03,450 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 325 predicate places. [2024-06-14 11:53:03,450 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 527 transitions, 6121 flow [2024-06-14 11:53:03,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:53:03,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:53:03,452 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 11:53:03,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-14 11:53:03,453 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:53:03,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:53:03,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1193521455, now seen corresponding path program 1 times [2024-06-14 11:53:03,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:53:03,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162227414] [2024-06-14 11:53:03,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:53:03,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:53:03,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:53:04,790 INFO 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 11:53:04,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:53:04,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162227414] [2024-06-14 11:53:04,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162227414] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:53:04,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:53:04,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 11:53:04,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693501366] [2024-06-14 11:53:04,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:53:04,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 11:53:04,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:53:04,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 11:53:04,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-06-14 11:53:04,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:53:04,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 527 transitions, 6121 flow. Second operand has 12 states, 12 states have (on average 11.333333333333334) internal successors, (136), 12 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:53:04,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:53:04,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:53:04,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:53:07,111 INFO L124 PetriNetUnfolderBase]: 4348/6980 cut-off events. [2024-06-14 11:53:07,111 INFO L125 PetriNetUnfolderBase]: For 1653881/1653886 co-relation queries the response was YES. [2024-06-14 11:53:07,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73442 conditions, 6980 events. 4348/6980 cut-off events. For 1653881/1653886 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 43755 event pairs, 786 based on Foata normal form. 14/6990 useless extension candidates. Maximal degree in co-relation 73271. Up to 5475 conditions per place. [2024-06-14 11:53:07,231 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 403 selfloop transitions, 177 changer transitions 0/585 dead transitions. [2024-06-14 11:53:07,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 585 transitions, 7762 flow [2024-06-14 11:53:07,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 11:53:07,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 11:53:07,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 223 transitions. [2024-06-14 11:53:07,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4607438016528926 [2024-06-14 11:53:07,232 INFO L175 Difference]: Start difference. First operand has 370 places, 527 transitions, 6121 flow. Second operand 11 states and 223 transitions. [2024-06-14 11:53:07,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 585 transitions, 7762 flow [2024-06-14 11:53:10,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 585 transitions, 7631 flow, removed 54 selfloop flow, removed 2 redundant places. [2024-06-14 11:53:10,917 INFO L231 Difference]: Finished difference. Result has 381 places, 538 transitions, 6606 flow [2024-06-14 11:53:10,918 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5990, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=527, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6606, PETRI_PLACES=381, PETRI_TRANSITIONS=538} [2024-06-14 11:53:10,918 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 336 predicate places. [2024-06-14 11:53:10,918 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 538 transitions, 6606 flow [2024-06-14 11:53:10,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.333333333333334) internal successors, (136), 12 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:53:10,919 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:53:10,919 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:53:10,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-14 11:53:10,919 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 11:53:10,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:53:10,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1701875094, now seen corresponding path program 1 times [2024-06-14 11:53:10,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:53:10,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088144044] [2024-06-14 11:53:10,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:53:10,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:53:10,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:53:11,890 INFO 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 11:53:11,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:53:11,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088144044] [2024-06-14 11:53:11,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088144044] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:53:11,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:53:11,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:53:11,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582236215] [2024-06-14 11:53:11,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:53:11,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:53:11,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:53:11,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:53:11,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:53:11,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:53:11,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 538 transitions, 6606 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:53:11,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:53:11,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:53:11,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:53:13,866 INFO L124 PetriNetUnfolderBase]: 4358/7027 cut-off events. [2024-06-14 11:53:13,866 INFO L125 PetriNetUnfolderBase]: For 1639344/1639349 co-relation queries the response was YES. [2024-06-14 11:53:13,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74941 conditions, 7027 events. 4358/7027 cut-off events. For 1639344/1639349 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 44387 event pairs, 819 based on Foata normal form. 4/7027 useless extension candidates. Maximal degree in co-relation 74765. Up to 6562 conditions per place. [2024-06-14 11:53:13,990 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 511 selfloop transitions, 48 changer transitions 0/564 dead transitions. [2024-06-14 11:53:13,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 564 transitions, 7936 flow [2024-06-14 11:53:13,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:53:13,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:53:13,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-14 11:53:13,991 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4346590909090909 [2024-06-14 11:53:13,991 INFO L175 Difference]: Start difference. First operand has 381 places, 538 transitions, 6606 flow. Second operand 8 states and 153 transitions. [2024-06-14 11:53:13,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 564 transitions, 7936 flow [2024-06-14 11:53:17,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 564 transitions, 7525 flow, removed 50 selfloop flow, removed 6 redundant places. [2024-06-14 11:53:17,315 INFO L231 Difference]: Finished difference. Result has 383 places, 541 transitions, 6403 flow [2024-06-14 11:53:17,315 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6195, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=490, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6403, PETRI_PLACES=383, PETRI_TRANSITIONS=541} [2024-06-14 11:53:17,315 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 338 predicate places. [2024-06-14 11:53:17,315 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 541 transitions, 6403 flow [2024-06-14 11:53:17,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:53:17,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:53:17,316 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:53:17,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-14 11:53:17,316 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 11:53:17,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:53:17,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1701666557, now seen corresponding path program 3 times [2024-06-14 11:53:17,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:53:17,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236813164] [2024-06-14 11:53:17,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:53:17,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:53:17,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:53:18,229 INFO 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 11:53:18,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:53:18,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236813164] [2024-06-14 11:53:18,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236813164] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:53:18,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:53:18,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:53:18,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557325661] [2024-06-14 11:53:18,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:53:18,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:53:18,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:53:18,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:53:18,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:53:18,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:53:18,292 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 541 transitions, 6403 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:53:18,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:53:18,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:53:18,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:53:20,047 INFO L124 PetriNetUnfolderBase]: 4368/7042 cut-off events. [2024-06-14 11:53:20,048 INFO L125 PetriNetUnfolderBase]: For 1653850/1653857 co-relation queries the response was YES. [2024-06-14 11:53:20,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74746 conditions, 7042 events. 4368/7042 cut-off events. For 1653850/1653857 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 44455 event pairs, 811 based on Foata normal form. 8/7046 useless extension candidates. Maximal degree in co-relation 74569. Up to 6498 conditions per place. [2024-06-14 11:53:20,165 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 477 selfloop transitions, 90 changer transitions 0/572 dead transitions. [2024-06-14 11:53:20,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 572 transitions, 7843 flow [2024-06-14 11:53:20,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:53:20,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:53:20,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-14 11:53:20,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-14 11:53:20,167 INFO L175 Difference]: Start difference. First operand has 383 places, 541 transitions, 6403 flow. Second operand 8 states and 152 transitions. [2024-06-14 11:53:20,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 572 transitions, 7843 flow [2024-06-14 11:53:23,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 572 transitions, 7687 flow, removed 44 selfloop flow, removed 5 redundant places. [2024-06-14 11:53:23,707 INFO L231 Difference]: Finished difference. Result has 386 places, 547 transitions, 6642 flow [2024-06-14 11:53:23,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6247, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=541, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=451, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6642, PETRI_PLACES=386, PETRI_TRANSITIONS=547} [2024-06-14 11:53:23,708 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 341 predicate places. [2024-06-14 11:53:23,708 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 547 transitions, 6642 flow [2024-06-14 11:53:23,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:53:23,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:53:23,708 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 11:53:23,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-14 11:53:23,708 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 11:53:23,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:53:23,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1702024824, now seen corresponding path program 2 times [2024-06-14 11:53:23,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:53:23,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318264087] [2024-06-14 11:53:23,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:53:23,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:53:23,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:53:24,721 INFO 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 11:53:24,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:53:24,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318264087] [2024-06-14 11:53:24,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318264087] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:53:24,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:53:24,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:53:24,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429357824] [2024-06-14 11:53:24,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:53:24,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:53:24,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:53:24,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:53:24,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:53:24,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:53:24,816 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 547 transitions, 6642 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:53:24,816 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:53:24,816 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:53:24,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:53:26,527 INFO L124 PetriNetUnfolderBase]: 4399/7080 cut-off events. [2024-06-14 11:53:26,527 INFO L125 PetriNetUnfolderBase]: For 1681944/1681950 co-relation queries the response was YES. [2024-06-14 11:53:26,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75633 conditions, 7080 events. 4399/7080 cut-off events. For 1681944/1681950 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 44702 event pairs, 817 based on Foata normal form. 4/7077 useless extension candidates. Maximal degree in co-relation 75455. Up to 6600 conditions per place. [2024-06-14 11:53:26,649 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 515 selfloop transitions, 56 changer transitions 0/576 dead transitions. [2024-06-14 11:53:26,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 576 transitions, 8062 flow [2024-06-14 11:53:26,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:53:26,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:53:26,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-14 11:53:26,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41414141414141414 [2024-06-14 11:53:26,650 INFO L175 Difference]: Start difference. First operand has 386 places, 547 transitions, 6642 flow. Second operand 9 states and 164 transitions. [2024-06-14 11:53:26,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 576 transitions, 8062 flow [2024-06-14 11:53:30,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 576 transitions, 7728 flow, removed 82 selfloop flow, removed 6 redundant places. [2024-06-14 11:53:30,997 INFO L231 Difference]: Finished difference. Result has 390 places, 556 transitions, 6610 flow [2024-06-14 11:53:30,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6308, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=494, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6610, PETRI_PLACES=390, PETRI_TRANSITIONS=556} [2024-06-14 11:53:30,998 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 345 predicate places. [2024-06-14 11:53:30,998 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 556 transitions, 6610 flow [2024-06-14 11:53:30,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:53:30,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:53:30,998 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 11:53:30,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-14 11:53:30,999 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 11:53:30,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:53:30,999 INFO L85 PathProgramCache]: Analyzing trace with hash -1234035687, now seen corresponding path program 1 times [2024-06-14 11:53:30,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:53:31,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877460356] [2024-06-14 11:53:31,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:53:31,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:53:31,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:53:32,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:53:32,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:53:32,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877460356] [2024-06-14 11:53:32,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877460356] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:53:32,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:53:32,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:53:32,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337609451] [2024-06-14 11:53:32,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:53:32,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:53:32,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:53:32,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:53:32,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:53:32,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:53:32,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 556 transitions, 6610 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:53:32,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:53:32,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:53:32,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:53:34,168 INFO L124 PetriNetUnfolderBase]: 4404/7096 cut-off events. [2024-06-14 11:53:34,168 INFO L125 PetriNetUnfolderBase]: For 1701938/1701943 co-relation queries the response was YES. [2024-06-14 11:53:34,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76187 conditions, 7096 events. 4404/7096 cut-off events. For 1701938/1701943 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 44864 event pairs, 814 based on Foata normal form. 5/7097 useless extension candidates. Maximal degree in co-relation 76007. Up to 6665 conditions per place. [2024-06-14 11:53:34,301 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 525 selfloop transitions, 48 changer transitions 0/578 dead transitions. [2024-06-14 11:53:34,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 578 transitions, 7928 flow [2024-06-14 11:53:34,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:53:34,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:53:34,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-14 11:53:34,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41761363636363635 [2024-06-14 11:53:34,305 INFO L175 Difference]: Start difference. First operand has 390 places, 556 transitions, 6610 flow. Second operand 8 states and 147 transitions. [2024-06-14 11:53:34,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 578 transitions, 7928 flow [2024-06-14 11:53:38,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 578 transitions, 7760 flow, removed 48 selfloop flow, removed 4 redundant places. [2024-06-14 11:53:38,882 INFO L231 Difference]: Finished difference. Result has 394 places, 559 transitions, 6650 flow [2024-06-14 11:53:38,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6442, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=556, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=508, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6650, PETRI_PLACES=394, PETRI_TRANSITIONS=559} [2024-06-14 11:53:38,884 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 349 predicate places. [2024-06-14 11:53:38,884 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 559 transitions, 6650 flow [2024-06-14 11:53:38,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:53:38,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:53:38,885 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 11:53:38,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-14 11:53:38,886 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 11:53:38,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:53:38,886 INFO L85 PathProgramCache]: Analyzing trace with hash -921426461, now seen corresponding path program 4 times [2024-06-14 11:53:38,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:53:38,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368156758] [2024-06-14 11:53:38,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:53:38,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:53:38,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:53:39,820 INFO 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 11:53:39,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:53:39,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368156758] [2024-06-14 11:53:39,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368156758] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:53:39,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:53:39,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:53:39,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363381293] [2024-06-14 11:53:39,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:53:39,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:53:39,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:53:39,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:53:39,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:53:39,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:53:39,888 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 559 transitions, 6650 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:53:39,888 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:53:39,888 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:53:39,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:53:41,668 INFO L124 PetriNetUnfolderBase]: 4409/7104 cut-off events. [2024-06-14 11:53:41,669 INFO L125 PetriNetUnfolderBase]: For 1725649/1725656 co-relation queries the response was YES. [2024-06-14 11:53:41,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76634 conditions, 7104 events. 4409/7104 cut-off events. For 1725649/1725656 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 44922 event pairs, 812 based on Foata normal form. 7/7107 useless extension candidates. Maximal degree in co-relation 76453. Up to 6526 conditions per place. [2024-06-14 11:53:41,791 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 474 selfloop transitions, 104 changer transitions 0/583 dead transitions. [2024-06-14 11:53:41,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 583 transitions, 8012 flow [2024-06-14 11:53:41,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:53:41,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:53:41,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-14 11:53:41,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42613636363636365 [2024-06-14 11:53:41,793 INFO L175 Difference]: Start difference. First operand has 394 places, 559 transitions, 6650 flow. Second operand 8 states and 150 transitions. [2024-06-14 11:53:41,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 583 transitions, 8012 flow [2024-06-14 11:53:46,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 583 transitions, 7830 flow, removed 46 selfloop flow, removed 6 redundant places. [2024-06-14 11:53:46,654 INFO L231 Difference]: Finished difference. Result has 396 places, 562 transitions, 6804 flow [2024-06-14 11:53:46,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6468, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=559, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=455, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6804, PETRI_PLACES=396, PETRI_TRANSITIONS=562} [2024-06-14 11:53:46,655 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 351 predicate places. [2024-06-14 11:53:46,655 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 562 transitions, 6804 flow [2024-06-14 11:53:46,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:53:46,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:53:46,656 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 11:53:46,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-14 11:53:46,656 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 11:53:46,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:53:46,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1908678481, now seen corresponding path program 2 times [2024-06-14 11:53:46,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:53:46,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480055980] [2024-06-14 11:53:46,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:53:46,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:53:46,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:53:48,179 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 11:53:48,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:53:48,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480055980] [2024-06-14 11:53:48,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480055980] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:53:48,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:53:48,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:53:48,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459461675] [2024-06-14 11:53:48,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:53:48,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:53:48,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:53:48,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:53:48,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:53:48,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:53:48,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 562 transitions, 6804 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:53:48,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:53:48,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:53:48,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:53:50,240 INFO L124 PetriNetUnfolderBase]: 4414/7120 cut-off events. [2024-06-14 11:53:50,240 INFO L125 PetriNetUnfolderBase]: For 1753219/1753224 co-relation queries the response was YES. [2024-06-14 11:53:50,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77350 conditions, 7120 events. 4414/7120 cut-off events. For 1753219/1753224 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 45153 event pairs, 820 based on Foata normal form. 5/7121 useless extension candidates. Maximal degree in co-relation 77168. Up to 6668 conditions per place. [2024-06-14 11:53:50,397 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 521 selfloop transitions, 54 changer transitions 0/580 dead transitions. [2024-06-14 11:53:50,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 580 transitions, 8110 flow [2024-06-14 11:53:50,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:53:50,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:53:50,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-14 11:53:50,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4119318181818182 [2024-06-14 11:53:50,399 INFO L175 Difference]: Start difference. First operand has 396 places, 562 transitions, 6804 flow. Second operand 8 states and 145 transitions. [2024-06-14 11:53:50,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 580 transitions, 8110 flow [2024-06-14 11:53:55,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 580 transitions, 7800 flow, removed 54 selfloop flow, removed 6 redundant places. [2024-06-14 11:53:55,035 INFO L231 Difference]: Finished difference. Result has 398 places, 565 transitions, 6720 flow [2024-06-14 11:53:55,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6494, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=562, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=508, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6720, PETRI_PLACES=398, PETRI_TRANSITIONS=565} [2024-06-14 11:53:55,053 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 353 predicate places. [2024-06-14 11:53:55,053 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 565 transitions, 6720 flow [2024-06-14 11:53:55,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:53:55,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:53:55,054 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 11:53:55,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-14 11:53:55,054 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 11:53:55,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:53:55,055 INFO L85 PathProgramCache]: Analyzing trace with hash 1908678264, now seen corresponding path program 3 times [2024-06-14 11:53:55,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:53:55,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913377928] [2024-06-14 11:53:55,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:53:55,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:53:55,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:53:56,142 INFO 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 11:53:56,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:53:56,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913377928] [2024-06-14 11:53:56,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913377928] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:53:56,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:53:56,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:53:56,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650464281] [2024-06-14 11:53:56,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:53:56,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:53:56,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:53:56,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:53:56,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:53:56,227 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:53:56,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 565 transitions, 6720 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:53:56,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:53:56,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:53:56,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:53:57,993 INFO L124 PetriNetUnfolderBase]: 4450/7164 cut-off events. [2024-06-14 11:53:57,993 INFO L125 PetriNetUnfolderBase]: For 1805076/1805082 co-relation queries the response was YES. [2024-06-14 11:53:58,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78562 conditions, 7164 events. 4450/7164 cut-off events. For 1805076/1805082 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 45294 event pairs, 829 based on Foata normal form. 4/7161 useless extension candidates. Maximal degree in co-relation 78379. Up to 6639 conditions per place. [2024-06-14 11:53:58,115 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 523 selfloop transitions, 66 changer transitions 0/594 dead transitions. [2024-06-14 11:53:58,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 594 transitions, 8552 flow [2024-06-14 11:53:58,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:53:58,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:53:58,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-14 11:53:58,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2024-06-14 11:53:58,116 INFO L175 Difference]: Start difference. First operand has 398 places, 565 transitions, 6720 flow. Second operand 9 states and 162 transitions. [2024-06-14 11:53:58,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 594 transitions, 8552 flow [2024-06-14 11:54:03,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 594 transitions, 8337 flow, removed 50 selfloop flow, removed 6 redundant places. [2024-06-14 11:54:03,013 INFO L231 Difference]: Finished difference. Result has 403 places, 577 transitions, 6991 flow [2024-06-14 11:54:03,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6516, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=565, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=502, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6991, PETRI_PLACES=403, PETRI_TRANSITIONS=577} [2024-06-14 11:54:03,014 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 358 predicate places. [2024-06-14 11:54:03,014 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 577 transitions, 6991 flow [2024-06-14 11:54:03,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:54:03,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:54:03,014 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 11:54:03,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-14 11:54:03,015 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 11:54:03,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:54:03,015 INFO L85 PathProgramCache]: Analyzing trace with hash -1414508631, now seen corresponding path program 3 times [2024-06-14 11:54:03,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:54:03,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212367046] [2024-06-14 11:54:03,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:54:03,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:54:03,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:54:04,099 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 11:54:04,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:54:04,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212367046] [2024-06-14 11:54:04,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212367046] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:54:04,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:54:04,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:54:04,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929005972] [2024-06-14 11:54:04,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:54:04,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:54:04,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:54:04,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:54:04,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:54:04,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:54:04,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 577 transitions, 6991 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:54:04,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:54:04,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:54:04,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:54:06,070 INFO L124 PetriNetUnfolderBase]: 4463/7182 cut-off events. [2024-06-14 11:54:06,070 INFO L125 PetriNetUnfolderBase]: For 1839624/1839629 co-relation queries the response was YES. [2024-06-14 11:54:06,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79699 conditions, 7182 events. 4463/7182 cut-off events. For 1839624/1839629 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 45444 event pairs, 821 based on Foata normal form. 5/7183 useless extension candidates. Maximal degree in co-relation 79513. Up to 6711 conditions per place. [2024-06-14 11:54:06,190 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 524 selfloop transitions, 70 changer transitions 0/599 dead transitions. [2024-06-14 11:54:06,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 599 transitions, 8719 flow [2024-06-14 11:54:06,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:54:06,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:54:06,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-14 11:54:06,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41761363636363635 [2024-06-14 11:54:06,191 INFO L175 Difference]: Start difference. First operand has 403 places, 577 transitions, 6991 flow. Second operand 8 states and 147 transitions. [2024-06-14 11:54:06,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 599 transitions, 8719 flow [2024-06-14 11:54:10,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 599 transitions, 8551 flow, removed 60 selfloop flow, removed 4 redundant places. [2024-06-14 11:54:10,478 INFO L231 Difference]: Finished difference. Result has 407 places, 583 transitions, 7203 flow [2024-06-14 11:54:10,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6823, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=577, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=510, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7203, PETRI_PLACES=407, PETRI_TRANSITIONS=583} [2024-06-14 11:54:10,478 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 362 predicate places. [2024-06-14 11:54:10,478 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 583 transitions, 7203 flow [2024-06-14 11:54:10,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:54:10,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:54:10,479 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 11:54:10,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-14 11:54:10,479 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 11:54:10,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:54:10,479 INFO L85 PathProgramCache]: Analyzing trace with hash -2141044447, now seen corresponding path program 5 times [2024-06-14 11:54:10,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:54:10,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523118961] [2024-06-14 11:54:10,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:54:10,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:54:10,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:54:11,511 INFO 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 11:54:11,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:54:11,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523118961] [2024-06-14 11:54:11,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523118961] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:54:11,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:54:11,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:54:11,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71406398] [2024-06-14 11:54:11,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:54:11,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:54:11,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:54:11,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:54:11,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:54:11,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:54:11,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 583 transitions, 7203 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:54:11,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:54:11,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:54:11,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:54:13,504 INFO L124 PetriNetUnfolderBase]: 4484/7215 cut-off events. [2024-06-14 11:54:13,505 INFO L125 PetriNetUnfolderBase]: For 1887754/1887761 co-relation queries the response was YES. [2024-06-14 11:54:13,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80960 conditions, 7215 events. 4484/7215 cut-off events. For 1887754/1887761 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 45601 event pairs, 831 based on Foata normal form. 7/7218 useless extension candidates. Maximal degree in co-relation 80772. Up to 6554 conditions per place. [2024-06-14 11:54:13,627 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 480 selfloop transitions, 133 changer transitions 0/618 dead transitions. [2024-06-14 11:54:13,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 618 transitions, 9478 flow [2024-06-14 11:54:13,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:54:13,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:54:13,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-14 11:54:13,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42613636363636365 [2024-06-14 11:54:13,629 INFO L175 Difference]: Start difference. First operand has 407 places, 583 transitions, 7203 flow. Second operand 8 states and 150 transitions. [2024-06-14 11:54:13,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 618 transitions, 9478 flow [2024-06-14 11:54:18,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 618 transitions, 9280 flow, removed 65 selfloop flow, removed 4 redundant places. [2024-06-14 11:54:18,059 INFO L231 Difference]: Finished difference. Result has 412 places, 600 transitions, 7836 flow [2024-06-14 11:54:18,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7005, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=583, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=456, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7836, PETRI_PLACES=412, PETRI_TRANSITIONS=600} [2024-06-14 11:54:18,059 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 367 predicate places. [2024-06-14 11:54:18,059 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 600 transitions, 7836 flow [2024-06-14 11:54:18,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:54:18,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:54:18,060 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:54:18,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-14 11:54:18,060 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 11:54:18,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:54:18,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1908528317, now seen corresponding path program 6 times [2024-06-14 11:54:18,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:54:18,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510231012] [2024-06-14 11:54:18,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:54:18,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:54:18,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:54:19,116 INFO 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 11:54:19,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:54:19,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510231012] [2024-06-14 11:54:19,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510231012] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:54:19,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:54:19,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:54:19,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133784246] [2024-06-14 11:54:19,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:54:19,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:54:19,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:54:19,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:54:19,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:54:19,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:54:19,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 600 transitions, 7836 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:54:19,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:54:19,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:54:19,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:54:21,041 INFO L124 PetriNetUnfolderBase]: 4489/7224 cut-off events. [2024-06-14 11:54:21,042 INFO L125 PetriNetUnfolderBase]: For 1919415/1919422 co-relation queries the response was YES. [2024-06-14 11:54:21,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81942 conditions, 7224 events. 4489/7224 cut-off events. For 1919415/1919422 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 45752 event pairs, 831 based on Foata normal form. 7/7227 useless extension candidates. Maximal degree in co-relation 81751. Up to 6560 conditions per place. [2024-06-14 11:54:21,174 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 482 selfloop transitions, 135 changer transitions 0/622 dead transitions. [2024-06-14 11:54:21,175 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 622 transitions, 9826 flow [2024-06-14 11:54:21,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:54:21,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:54:21,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-14 11:54:21,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42613636363636365 [2024-06-14 11:54:21,176 INFO L175 Difference]: Start difference. First operand has 412 places, 600 transitions, 7836 flow. Second operand 8 states and 150 transitions. [2024-06-14 11:54:21,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 622 transitions, 9826 flow [2024-06-14 11:54:27,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 622 transitions, 9573 flow, removed 89 selfloop flow, removed 3 redundant places. [2024-06-14 11:54:27,180 INFO L231 Difference]: Finished difference. Result has 417 places, 604 transitions, 8024 flow [2024-06-14 11:54:27,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7605, PETRI_DIFFERENCE_MINUEND_PLACES=409, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=600, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=469, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8024, PETRI_PLACES=417, PETRI_TRANSITIONS=604} [2024-06-14 11:54:27,181 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 372 predicate places. [2024-06-14 11:54:27,181 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 604 transitions, 8024 flow [2024-06-14 11:54:27,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:54:27,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:54:27,181 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 11:54:27,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-14 11:54:27,182 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:54:27,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:54:27,182 INFO L85 PathProgramCache]: Analyzing trace with hash -1761241119, now seen corresponding path program 2 times [2024-06-14 11:54:27,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:54:27,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395186479] [2024-06-14 11:54:27,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:54:27,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:54:27,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:54:28,437 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 11:54:28,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:54:28,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395186479] [2024-06-14 11:54:28,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395186479] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:54:28,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:54:28,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 11:54:28,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449666139] [2024-06-14 11:54:28,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:54:28,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 11:54:28,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:54:28,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 11:54:28,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-06-14 11:54:28,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:54:28,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 604 transitions, 8024 flow. Second operand has 12 states, 12 states have (on average 11.333333333333334) internal successors, (136), 12 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:54:28,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:54:28,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:54:28,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:54:31,212 INFO L124 PetriNetUnfolderBase]: 4612/7429 cut-off events. [2024-06-14 11:54:31,213 INFO L125 PetriNetUnfolderBase]: For 2015388/2015391 co-relation queries the response was YES. [2024-06-14 11:54:31,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83729 conditions, 7429 events. 4612/7429 cut-off events. For 2015388/2015391 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 47328 event pairs, 804 based on Foata normal form. 12/7437 useless extension candidates. Maximal degree in co-relation 83536. Up to 5963 conditions per place. [2024-06-14 11:54:31,368 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 483 selfloop transitions, 172 changer transitions 0/660 dead transitions. [2024-06-14 11:54:31,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 660 transitions, 9830 flow [2024-06-14 11:54:31,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 11:54:31,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 11:54:31,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 224 transitions. [2024-06-14 11:54:31,370 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4628099173553719 [2024-06-14 11:54:31,370 INFO L175 Difference]: Start difference. First operand has 417 places, 604 transitions, 8024 flow. Second operand 11 states and 224 transitions. [2024-06-14 11:54:31,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 660 transitions, 9830 flow [2024-06-14 11:54:36,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 660 transitions, 9542 flow, removed 59 selfloop flow, removed 4 redundant places. [2024-06-14 11:54:36,318 INFO L231 Difference]: Finished difference. Result has 426 places, 612 transitions, 8303 flow [2024-06-14 11:54:36,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7736, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=604, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=436, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8303, PETRI_PLACES=426, PETRI_TRANSITIONS=612} [2024-06-14 11:54:36,319 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 381 predicate places. [2024-06-14 11:54:36,319 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 612 transitions, 8303 flow [2024-06-14 11:54:36,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.333333333333334) internal successors, (136), 12 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:54:36,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:54:36,320 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 11:54:36,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-14 11:54:36,320 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:54:36,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:54:36,321 INFO L85 PathProgramCache]: Analyzing trace with hash 177558335, now seen corresponding path program 3 times [2024-06-14 11:54:36,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:54:36,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380613672] [2024-06-14 11:54:36,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:54:36,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:54:36,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:54:37,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:54:37,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:54:37,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380613672] [2024-06-14 11:54:37,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380613672] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:54:37,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:54:37,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 11:54:37,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659043433] [2024-06-14 11:54:37,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:54:37,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 11:54:37,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:54:37,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 11:54:37,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-06-14 11:54:38,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:54:38,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 612 transitions, 8303 flow. Second operand has 12 states, 12 states have (on average 11.333333333333334) internal successors, (136), 12 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:54:38,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:54:38,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:54:38,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:54:40,859 INFO L124 PetriNetUnfolderBase]: 4722/7631 cut-off events. [2024-06-14 11:54:40,859 INFO L125 PetriNetUnfolderBase]: For 2066495/2066498 co-relation queries the response was YES. [2024-06-14 11:54:40,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86227 conditions, 7631 events. 4722/7631 cut-off events. For 2066495/2066498 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 49157 event pairs, 867 based on Foata normal form. 12/7639 useless extension candidates. Maximal degree in co-relation 86031. Up to 6236 conditions per place. [2024-06-14 11:54:41,013 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 474 selfloop transitions, 187 changer transitions 0/666 dead transitions. [2024-06-14 11:54:41,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 666 transitions, 10092 flow [2024-06-14 11:54:41,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 11:54:41,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 11:54:41,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 222 transitions. [2024-06-14 11:54:41,014 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45867768595041325 [2024-06-14 11:54:41,014 INFO L175 Difference]: Start difference. First operand has 426 places, 612 transitions, 8303 flow. Second operand 11 states and 222 transitions. [2024-06-14 11:54:41,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 666 transitions, 10092 flow [2024-06-14 11:54:45,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 666 transitions, 9667 flow, removed 52 selfloop flow, removed 6 redundant places. [2024-06-14 11:54:45,558 INFO L231 Difference]: Finished difference. Result has 433 places, 620 transitions, 8501 flow [2024-06-14 11:54:45,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7888, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=612, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8501, PETRI_PLACES=433, PETRI_TRANSITIONS=620} [2024-06-14 11:54:45,559 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 388 predicate places. [2024-06-14 11:54:45,559 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 620 transitions, 8501 flow [2024-06-14 11:54:45,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.333333333333334) internal successors, (136), 12 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:54:45,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:54:45,559 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 11:54:45,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-14 11:54:45,559 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:54:45,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:54:45,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1118873605, now seen corresponding path program 4 times [2024-06-14 11:54:45,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:54:45,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900918143] [2024-06-14 11:54:45,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:54:45,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:54:45,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:54:46,900 INFO 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 11:54:46,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:54:46,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900918143] [2024-06-14 11:54:46,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900918143] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:54:46,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:54:46,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 11:54:46,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895327371] [2024-06-14 11:54:46,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:54:46,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 11:54:46,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:54:46,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 11:54:46,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-06-14 11:54:47,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:54:47,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 620 transitions, 8501 flow. Second operand has 12 states, 12 states have (on average 11.333333333333334) internal successors, (136), 12 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:54:47,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:54:47,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:54:47,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:54:49,732 INFO L124 PetriNetUnfolderBase]: 4804/7793 cut-off events. [2024-06-14 11:54:49,733 INFO L125 PetriNetUnfolderBase]: For 2100772/2100775 co-relation queries the response was YES. [2024-06-14 11:54:49,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87768 conditions, 7793 events. 4804/7793 cut-off events. For 2100772/2100775 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 50742 event pairs, 897 based on Foata normal form. 12/7801 useless extension candidates. Maximal degree in co-relation 87569. Up to 6378 conditions per place. [2024-06-14 11:54:49,915 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 480 selfloop transitions, 183 changer transitions 0/668 dead transitions. [2024-06-14 11:54:49,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 668 transitions, 10228 flow [2024-06-14 11:54:49,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 11:54:49,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 11:54:49,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 223 transitions. [2024-06-14 11:54:49,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4607438016528926 [2024-06-14 11:54:49,917 INFO L175 Difference]: Start difference. First operand has 433 places, 620 transitions, 8501 flow. Second operand 11 states and 223 transitions. [2024-06-14 11:54:49,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 668 transitions, 10228 flow [2024-06-14 11:54:55,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 668 transitions, 9834 flow, removed 55 selfloop flow, removed 5 redundant places. [2024-06-14 11:54:55,422 INFO L231 Difference]: Finished difference. Result has 440 places, 622 transitions, 8615 flow [2024-06-14 11:54:55,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=8111, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=620, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=437, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8615, PETRI_PLACES=440, PETRI_TRANSITIONS=622} [2024-06-14 11:54:55,422 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 395 predicate places. [2024-06-14 11:54:55,423 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 622 transitions, 8615 flow [2024-06-14 11:54:55,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.333333333333334) internal successors, (136), 12 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:54:55,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:54:55,423 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 11:54:55,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-14 11:54:55,423 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:54:55,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:54:55,424 INFO L85 PathProgramCache]: Analyzing trace with hash 185890205, now seen corresponding path program 5 times [2024-06-14 11:54:55,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:54:55,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296178695] [2024-06-14 11:54:55,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:54:55,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:54:55,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:54:56,741 INFO 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 11:54:56,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:54:56,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296178695] [2024-06-14 11:54:56,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296178695] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:54:56,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:54:56,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 11:54:56,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127677291] [2024-06-14 11:54:56,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:54:56,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 11:54:56,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:54:56,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 11:54:56,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2024-06-14 11:54:56,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:54:56,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 622 transitions, 8615 flow. Second operand has 12 states, 12 states have (on average 11.333333333333334) internal successors, (136), 12 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:54:56,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:54:56,898 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:54:56,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:54:59,711 INFO L124 PetriNetUnfolderBase]: 4845/7874 cut-off events. [2024-06-14 11:54:59,711 INFO L125 PetriNetUnfolderBase]: For 2130900/2130903 co-relation queries the response was YES. [2024-06-14 11:54:59,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87958 conditions, 7874 events. 4845/7874 cut-off events. For 2130900/2130903 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 51484 event pairs, 901 based on Foata normal form. 12/7882 useless extension candidates. Maximal degree in co-relation 87757. Up to 5526 conditions per place. [2024-06-14 11:54:59,840 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 463 selfloop transitions, 202 changer transitions 0/670 dead transitions. [2024-06-14 11:54:59,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 670 transitions, 10324 flow [2024-06-14 11:54:59,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 11:54:59,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 11:54:59,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 222 transitions. [2024-06-14 11:54:59,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45867768595041325 [2024-06-14 11:54:59,842 INFO L175 Difference]: Start difference. First operand has 440 places, 622 transitions, 8615 flow. Second operand 11 states and 222 transitions. [2024-06-14 11:54:59,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 670 transitions, 10324 flow [2024-06-14 11:55:04,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 670 transitions, 9829 flow, removed 47 selfloop flow, removed 9 redundant places. [2024-06-14 11:55:04,115 INFO L231 Difference]: Finished difference. Result has 442 places, 623 transitions, 8634 flow [2024-06-14 11:55:04,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=8120, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=622, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=201, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8634, PETRI_PLACES=442, PETRI_TRANSITIONS=623} [2024-06-14 11:55:04,116 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 397 predicate places. [2024-06-14 11:55:04,116 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 623 transitions, 8634 flow [2024-06-14 11:55:04,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.333333333333334) internal successors, (136), 12 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:55:04,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:55:04,116 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 11:55:04,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-14 11:55:04,116 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 11:55:04,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:55:04,117 INFO L85 PathProgramCache]: Analyzing trace with hash 1564451195, now seen corresponding path program 1 times [2024-06-14 11:55:04,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:55:04,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823660862] [2024-06-14 11:55:04,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:55:04,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:55:04,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:55:05,431 INFO 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 11:55:05,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:55:05,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823660862] [2024-06-14 11:55:05,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823660862] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:55:05,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:55:05,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:55:05,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940031300] [2024-06-14 11:55:05,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:55:05,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:55:05,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:55:05,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:55:05,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:55:05,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-14 11:55:05,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 623 transitions, 8634 flow. Second operand has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:55:05,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:55:05,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-14 11:55:05,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:55:07,952 INFO L124 PetriNetUnfolderBase]: 4403/7358 cut-off events. [2024-06-14 11:55:07,953 INFO L125 PetriNetUnfolderBase]: For 2106113/2106144 co-relation queries the response was YES. [2024-06-14 11:55:08,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84033 conditions, 7358 events. 4403/7358 cut-off events. For 2106113/2106144 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 50021 event pairs, 853 based on Foata normal form. 27/7298 useless extension candidates. Maximal degree in co-relation 83833. Up to 6270 conditions per place. [2024-06-14 11:55:08,095 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 439 selfloop transitions, 83 changer transitions 0/648 dead transitions. [2024-06-14 11:55:08,095 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 648 transitions, 9848 flow [2024-06-14 11:55:08,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:55:08,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:55:08,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-14 11:55:08,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45202020202020204 [2024-06-14 11:55:08,096 INFO L175 Difference]: Start difference. First operand has 442 places, 623 transitions, 8634 flow. Second operand 9 states and 179 transitions. [2024-06-14 11:55:08,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 648 transitions, 9848 flow [2024-06-14 11:55:13,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 648 transitions, 9356 flow, removed 45 selfloop flow, removed 9 redundant places. [2024-06-14 11:55:14,017 INFO L231 Difference]: Finished difference. Result has 442 places, 626 transitions, 8406 flow [2024-06-14 11:55:14,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=8142, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=623, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=540, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8406, PETRI_PLACES=442, PETRI_TRANSITIONS=626} [2024-06-14 11:55:14,018 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 397 predicate places. [2024-06-14 11:55:14,018 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 626 transitions, 8406 flow [2024-06-14 11:55:14,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:55:14,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:55:14,018 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:55:14,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-14 11:55:14,018 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 11:55:14,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:55:14,019 INFO L85 PathProgramCache]: Analyzing trace with hash -1027105417, now seen corresponding path program 1 times [2024-06-14 11:55:14,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:55:14,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954254108] [2024-06-14 11:55:14,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:55:14,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:55:14,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:55:16,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:55:16,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:55:16,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954254108] [2024-06-14 11:55:16,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954254108] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:55:16,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:55:16,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:55:16,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837262485] [2024-06-14 11:55:16,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:55:16,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:55:16,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:55:16,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:55:16,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:55:16,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-14 11:55:16,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 626 transitions, 8406 flow. Second operand has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:55:16,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:55:16,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-14 11:55:16,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:55:18,493 INFO L124 PetriNetUnfolderBase]: 4424/7391 cut-off events. [2024-06-14 11:55:18,493 INFO L125 PetriNetUnfolderBase]: For 2109245/2109276 co-relation queries the response was YES. [2024-06-14 11:55:18,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84051 conditions, 7391 events. 4424/7391 cut-off events. For 2109245/2109276 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 50276 event pairs, 872 based on Foata normal form. 24/7319 useless extension candidates. Maximal degree in co-relation 83850. Up to 6398 conditions per place. [2024-06-14 11:55:18,638 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 488 selfloop transitions, 31 changer transitions 0/645 dead transitions. [2024-06-14 11:55:18,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 645 transitions, 9578 flow [2024-06-14 11:55:18,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:55:18,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:55:18,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-14 11:55:18,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43434343434343436 [2024-06-14 11:55:18,639 INFO L175 Difference]: Start difference. First operand has 442 places, 626 transitions, 8406 flow. Second operand 9 states and 172 transitions. [2024-06-14 11:55:18,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 645 transitions, 9578 flow [2024-06-14 11:55:25,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 645 transitions, 9352 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-14 11:55:25,297 INFO L231 Difference]: Finished difference. Result has 445 places, 629 transitions, 8336 flow [2024-06-14 11:55:25,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=8180, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=626, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=595, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8336, PETRI_PLACES=445, PETRI_TRANSITIONS=629} [2024-06-14 11:55:25,298 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 400 predicate places. [2024-06-14 11:55:25,298 INFO L495 AbstractCegarLoop]: Abstraction has has 445 places, 629 transitions, 8336 flow [2024-06-14 11:55:25,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:55:25,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:55:25,298 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:55:25,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-14 11:55:25,298 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 11:55:25,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:55:25,299 INFO L85 PathProgramCache]: Analyzing trace with hash 1867478259, now seen corresponding path program 2 times [2024-06-14 11:55:25,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:55:25,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370263882] [2024-06-14 11:55:25,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:55:25,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:55:25,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:55:26,748 INFO 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 11:55:26,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:55:26,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370263882] [2024-06-14 11:55:26,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370263882] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:55:26,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:55:26,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:55:26,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440499074] [2024-06-14 11:55:26,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:55:26,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:55:26,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:55:26,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:55:26,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:55:26,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-14 11:55:26,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 629 transitions, 8336 flow. Second operand has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:55:26,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:55:26,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-14 11:55:26,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:55:29,157 INFO L124 PetriNetUnfolderBase]: 4461/7436 cut-off events. [2024-06-14 11:55:29,158 INFO L125 PetriNetUnfolderBase]: For 2206142/2206249 co-relation queries the response was YES. [2024-06-14 11:55:29,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85015 conditions, 7436 events. 4461/7436 cut-off events. For 2206142/2206249 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 50466 event pairs, 870 based on Foata normal form. 29/7359 useless extension candidates. Maximal degree in co-relation 84813. Up to 6275 conditions per place. [2024-06-14 11:55:29,285 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 421 selfloop transitions, 107 changer transitions 0/654 dead transitions. [2024-06-14 11:55:29,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 654 transitions, 9932 flow [2024-06-14 11:55:29,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:55:29,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:55:29,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-14 11:55:29,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45202020202020204 [2024-06-14 11:55:29,287 INFO L175 Difference]: Start difference. First operand has 445 places, 629 transitions, 8336 flow. Second operand 9 states and 179 transitions. [2024-06-14 11:55:29,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 654 transitions, 9932 flow [2024-06-14 11:55:35,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 654 transitions, 9804 flow, removed 35 selfloop flow, removed 7 redundant places. [2024-06-14 11:55:35,682 INFO L231 Difference]: Finished difference. Result has 447 places, 635 transitions, 8619 flow [2024-06-14 11:55:35,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=8208, PETRI_DIFFERENCE_MINUEND_PLACES=438, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=629, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=525, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8619, PETRI_PLACES=447, PETRI_TRANSITIONS=635} [2024-06-14 11:55:35,682 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 402 predicate places. [2024-06-14 11:55:35,683 INFO L495 AbstractCegarLoop]: Abstraction has has 447 places, 635 transitions, 8619 flow [2024-06-14 11:55:35,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:55:35,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:55:35,683 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:55:35,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-14 11:55:35,683 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 11:55:35,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:55:35,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1867464309, now seen corresponding path program 3 times [2024-06-14 11:55:35,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:55:35,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944961430] [2024-06-14 11:55:35,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:55:35,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:55:35,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:55:36,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:55:36,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:55:36,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944961430] [2024-06-14 11:55:36,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944961430] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:55:36,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:55:36,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:55:36,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500368045] [2024-06-14 11:55:36,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:55:36,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:55:36,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:55:36,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:55:36,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:55:37,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-14 11:55:37,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 447 places, 635 transitions, 8619 flow. Second operand has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:55:37,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:55:37,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-14 11:55:37,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:55:39,764 INFO L124 PetriNetUnfolderBase]: 4471/7446 cut-off events. [2024-06-14 11:55:39,764 INFO L125 PetriNetUnfolderBase]: For 2246371/2246518 co-relation queries the response was YES. [2024-06-14 11:55:39,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85986 conditions, 7446 events. 4471/7446 cut-off events. For 2246371/2246518 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 50472 event pairs, 870 based on Foata normal form. 27/7365 useless extension candidates. Maximal degree in co-relation 85783. Up to 6285 conditions per place. [2024-06-14 11:55:39,890 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 424 selfloop transitions, 108 changer transitions 0/658 dead transitions. [2024-06-14 11:55:39,890 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 658 transitions, 10151 flow [2024-06-14 11:55:39,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:55:39,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:55:39,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 181 transitions. [2024-06-14 11:55:39,891 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45707070707070707 [2024-06-14 11:55:39,891 INFO L175 Difference]: Start difference. First operand has 447 places, 635 transitions, 8619 flow. Second operand 9 states and 181 transitions. [2024-06-14 11:55:39,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 658 transitions, 10151 flow [2024-06-14 11:55:43,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 450 places, 658 transitions, 9902 flow, removed 61 selfloop flow, removed 5 redundant places. [2024-06-14 11:55:43,734 INFO L231 Difference]: Finished difference. Result has 451 places, 638 transitions, 8690 flow [2024-06-14 11:55:43,734 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=8390, PETRI_DIFFERENCE_MINUEND_PLACES=442, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=635, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=530, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8690, PETRI_PLACES=451, PETRI_TRANSITIONS=638} [2024-06-14 11:55:43,735 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 406 predicate places. [2024-06-14 11:55:43,735 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 638 transitions, 8690 flow [2024-06-14 11:55:43,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:55:43,735 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:55:43,735 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 11:55:43,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-14 11:55:43,735 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 11:55:43,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:55:43,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1908537245, now seen corresponding path program 4 times [2024-06-14 11:55:43,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:55:43,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735002262] [2024-06-14 11:55:43,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:55:43,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:55:43,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:55:45,014 INFO 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 11:55:45,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:55:45,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735002262] [2024-06-14 11:55:45,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735002262] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:55:45,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:55:45,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 11:55:45,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727428758] [2024-06-14 11:55:45,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:55:45,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 11:55:45,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:55:45,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 11:55:45,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 11:55:45,169 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-14 11:55:45,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 638 transitions, 8690 flow. Second operand has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:55:45,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:55:45,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-14 11:55:45,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:55:47,645 INFO L124 PetriNetUnfolderBase]: 4474/7445 cut-off events. [2024-06-14 11:55:47,645 INFO L125 PetriNetUnfolderBase]: For 2235451/2235522 co-relation queries the response was YES. [2024-06-14 11:55:47,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85652 conditions, 7445 events. 4474/7445 cut-off events. For 2235451/2235522 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 50393 event pairs, 867 based on Foata normal form. 25/7364 useless extension candidates. Maximal degree in co-relation 85447. Up to 6354 conditions per place. [2024-06-14 11:55:47,777 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 439 selfloop transitions, 90 changer transitions 0/655 dead transitions. [2024-06-14 11:55:47,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 655 transitions, 9812 flow [2024-06-14 11:55:47,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:55:47,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:55:47,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-14 11:55:47,779 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44191919191919193 [2024-06-14 11:55:47,779 INFO L175 Difference]: Start difference. First operand has 451 places, 638 transitions, 8690 flow. Second operand 9 states and 175 transitions. [2024-06-14 11:55:47,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 655 transitions, 9812 flow [2024-06-14 11:55:51,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 655 transitions, 9519 flow, removed 57 selfloop flow, removed 6 redundant places. [2024-06-14 11:55:51,188 INFO L231 Difference]: Finished difference. Result has 454 places, 638 transitions, 8583 flow [2024-06-14 11:55:51,189 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=8397, PETRI_DIFFERENCE_MINUEND_PLACES=445, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=638, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=548, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8583, PETRI_PLACES=454, PETRI_TRANSITIONS=638} [2024-06-14 11:55:51,189 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 409 predicate places. [2024-06-14 11:55:51,189 INFO L495 AbstractCegarLoop]: Abstraction has has 454 places, 638 transitions, 8583 flow [2024-06-14 11:55:51,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:55:51,189 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:55:51,189 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 11:55:51,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-14 11:55:51,190 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 11:55:51,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:55:51,190 INFO L85 PathProgramCache]: Analyzing trace with hash -1311131468, now seen corresponding path program 4 times [2024-06-14 11:55:51,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:55:51,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820384086] [2024-06-14 11:55:51,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:55:51,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:55:51,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:55:52,071 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 11:55:52,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:55:52,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820384086] [2024-06-14 11:55:52,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820384086] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:55:52,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:55:52,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:55:52,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218855470] [2024-06-14 11:55:52,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:55:52,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:55:52,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:55:52,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:55:52,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:55:52,146 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:55:52,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 454 places, 638 transitions, 8583 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:55:52,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:55:52,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:55:52,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:55:54,994 INFO L124 PetriNetUnfolderBase]: 4940/8033 cut-off events. [2024-06-14 11:55:54,994 INFO L125 PetriNetUnfolderBase]: For 2224618/2224624 co-relation queries the response was YES. [2024-06-14 11:55:55,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89826 conditions, 8033 events. 4940/8033 cut-off events. For 2224618/2224624 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 52792 event pairs, 957 based on Foata normal form. 6/8031 useless extension candidates. Maximal degree in co-relation 89620. Up to 7485 conditions per place. [2024-06-14 11:55:55,129 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 604 selfloop transitions, 52 changer transitions 0/661 dead transitions. [2024-06-14 11:55:55,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 461 places, 661 transitions, 10108 flow [2024-06-14 11:55:55,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:55:55,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:55:55,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-14 11:55:55,131 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42329545454545453 [2024-06-14 11:55:55,131 INFO L175 Difference]: Start difference. First operand has 454 places, 638 transitions, 8583 flow. Second operand 8 states and 149 transitions. [2024-06-14 11:55:55,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 461 places, 661 transitions, 10108 flow [2024-06-14 11:56:00,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 452 places, 661 transitions, 9871 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-14 11:56:00,908 INFO L231 Difference]: Finished difference. Result has 453 places, 641 transitions, 8579 flow [2024-06-14 11:56:00,908 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=8346, PETRI_DIFFERENCE_MINUEND_PLACES=445, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=638, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=586, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8579, PETRI_PLACES=453, PETRI_TRANSITIONS=641} [2024-06-14 11:56:00,913 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 408 predicate places. [2024-06-14 11:56:00,913 INFO L495 AbstractCegarLoop]: Abstraction has has 453 places, 641 transitions, 8579 flow [2024-06-14 11:56:00,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:56:00,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:56:00,913 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 11:56:00,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-14 11:56:00,928 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 11:56:00,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:56:00,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1310743658, now seen corresponding path program 5 times [2024-06-14 11:56:00,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:56:00,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546406729] [2024-06-14 11:56:00,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:56:00,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:56:00,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:56:02,110 INFO 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 11:56:02,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:56:02,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546406729] [2024-06-14 11:56:02,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546406729] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:56:02,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:56:02,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:56:02,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150307327] [2024-06-14 11:56:02,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:56:02,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:56:02,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:56:02,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:56:02,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:56:02,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:56:02,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 453 places, 641 transitions, 8579 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:56:02,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:56:02,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:56:02,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:56:04,942 INFO L124 PetriNetUnfolderBase]: 4966/8060 cut-off events. [2024-06-14 11:56:04,943 INFO L125 PetriNetUnfolderBase]: For 2278047/2278053 co-relation queries the response was YES. [2024-06-14 11:56:05,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90863 conditions, 8060 events. 4966/8060 cut-off events. For 2278047/2278053 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 52842 event pairs, 948 based on Foata normal form. 6/8059 useless extension candidates. Maximal degree in co-relation 90656. Up to 7486 conditions per place. [2024-06-14 11:56:05,094 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 593 selfloop transitions, 68 changer transitions 0/666 dead transitions. [2024-06-14 11:56:05,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 461 places, 666 transitions, 10546 flow [2024-06-14 11:56:05,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:56:05,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:56:05,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-14 11:56:05,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4065656565656566 [2024-06-14 11:56:05,096 INFO L175 Difference]: Start difference. First operand has 453 places, 641 transitions, 8579 flow. Second operand 9 states and 161 transitions. [2024-06-14 11:56:05,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 461 places, 666 transitions, 10546 flow [2024-06-14 11:56:10,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 666 transitions, 10306 flow, removed 48 selfloop flow, removed 8 redundant places. [2024-06-14 11:56:10,679 INFO L231 Difference]: Finished difference. Result has 455 places, 647 transitions, 8764 flow [2024-06-14 11:56:10,679 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=8339, PETRI_DIFFERENCE_MINUEND_PLACES=445, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=641, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=573, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8764, PETRI_PLACES=455, PETRI_TRANSITIONS=647} [2024-06-14 11:56:10,680 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 410 predicate places. [2024-06-14 11:56:10,680 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 647 transitions, 8764 flow [2024-06-14 11:56:10,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:56:10,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:56:10,680 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 11:56:10,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-14 11:56:10,680 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 11:56:10,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:56:10,681 INFO L85 PathProgramCache]: Analyzing trace with hash 325709680, now seen corresponding path program 6 times [2024-06-14 11:56:10,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:56:10,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930830731] [2024-06-14 11:56:10,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:56:10,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:56:10,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:56:11,629 INFO 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 11:56:11,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:56:11,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930830731] [2024-06-14 11:56:11,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930830731] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:56:11,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:56:11,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 11:56:11,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607470653] [2024-06-14 11:56:11,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:56:11,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 11:56:11,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:56:11,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 11:56:11,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 11:56:11,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-14 11:56:11,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 647 transitions, 8764 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:56:11,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:56:11,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-14 11:56:11,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand