./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix020.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/protection/mix020.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f 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/mix020.opt.i ./goblint.2024-06-19_11-23-25.files/protection/mix020.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-eb4cb34-m [2024-06-21 16:31:41,608 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 16:31:41,677 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 16:31:41,682 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 16:31:41,683 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 16:31:41,703 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 16:31:41,703 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 16:31:41,703 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 16:31:41,704 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 16:31:41,704 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 16:31:41,704 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 16:31:41,704 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 16:31:41,705 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 16:31:41,705 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 16:31:41,705 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 16:31:41,705 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 16:31:41,706 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 16:31:41,706 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 16:31:41,706 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 16:31:41,706 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 16:31:41,707 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 16:31:41,707 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 16:31:41,707 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 16:31:41,707 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 16:31:41,707 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 16:31:41,708 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 16:31:41,708 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 16:31:41,708 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 16:31:41,708 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 16:31:41,708 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 16:31:41,708 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 16:31:41,709 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 16:31:41,709 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 16:31:41,709 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 16:31:41,709 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 16:31:41,709 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 16:31:41,709 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 16:31:41,709 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 16:31:41,710 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 16:31:41,710 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 16:31:41,710 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 16:31:41,712 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 16:31:41,713 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 16:31:41,713 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 16:31:41,896 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 16:31:41,915 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 16:31:41,917 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 16:31:41,918 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 16:31:41,919 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 16:31:41,920 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix020.opt.i [2024-06-21 16:31:42,935 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 16:31:43,127 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 16:31:43,128 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix020.opt.i [2024-06-21 16:31:43,139 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/08e48076b/44e63b86bd73477bb7e5b6f13e2afc04/FLAGc28ffddfe [2024-06-21 16:31:43,150 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/08e48076b/44e63b86bd73477bb7e5b6f13e2afc04 [2024-06-21 16:31:43,152 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 16:31:43,152 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 16:31:43,153 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/mix020.opt.yml/witness.yml [2024-06-21 16:31:43,291 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 16:31:43,292 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 16:31:43,293 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 16:31:43,293 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 16:31:43,297 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 16:31:43,297 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 04:31:43" (1/2) ... [2024-06-21 16:31:43,298 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e243d63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:31:43, skipping insertion in model container [2024-06-21 16:31:43,298 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 04:31:43" (1/2) ... [2024-06-21 16:31:43,299 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7a3282e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:31:43, skipping insertion in model container [2024-06-21 16:31:43,299 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 04:31:43" (2/2) ... [2024-06-21 16:31:43,300 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e243d63 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:31:43, skipping insertion in model container [2024-06-21 16:31:43,300 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 04:31:43" (2/2) ... [2024-06-21 16:31:43,300 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 16:31:43,405 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 16:31:43,407 INFO L97 edCorrectnessWitness]: Location invariant before [L867-L867] ((((((((((((((((((((((! multithreaded || z$r_buff1_thd1 == (_Bool)0) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)) [2024-06-21 16:31:43,407 INFO L97 edCorrectnessWitness]: Location invariant before [L871-L871] ((((((((((((((((((((((! multithreaded || z$r_buff1_thd1 == (_Bool)0) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)) [2024-06-21 16:31:43,407 INFO L97 edCorrectnessWitness]: Location invariant before [L869-L869] ((((((((((((((((((((((! multithreaded || z$r_buff1_thd1 == (_Bool)0) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)) [2024-06-21 16:31:43,407 INFO L97 edCorrectnessWitness]: Location invariant before [L872-L872] ((((((((((((((((((((((! multithreaded || z$r_buff1_thd1 == (_Bool)0) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)) [2024-06-21 16:31:43,407 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 16:31:43,408 INFO L106 edCorrectnessWitness]: ghost_update [L865-L865] multithreaded = 1; [2024-06-21 16:31:43,445 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 16:31:43,724 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 16:31:43,736 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 16:31:43,840 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 16:31:43,877 INFO L206 MainTranslator]: Completed translation [2024-06-21 16:31:43,878 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:31:43 WrapperNode [2024-06-21 16:31:43,878 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 16:31:43,879 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 16:31:43,879 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 16:31:43,879 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 16:31:43,884 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 21.06 04:31:43" (1/1) ... [2024-06-21 16:31:43,894 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 21.06 04:31:43" (1/1) ... [2024-06-21 16:31:43,919 INFO L138 Inliner]: procedures = 176, calls = 54, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 161 [2024-06-21 16:31:43,920 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 16:31:43,920 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 16:31:43,920 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 16:31:43,921 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 16:31:43,928 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:31:43" (1/1) ... [2024-06-21 16:31:43,929 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:31:43" (1/1) ... [2024-06-21 16:31:43,932 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:31:43" (1/1) ... [2024-06-21 16:31:43,944 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]. [2024-06-21 16:31:43,945 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:31:43" (1/1) ... [2024-06-21 16:31:43,945 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:31:43" (1/1) ... [2024-06-21 16:31:43,953 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:31:43" (1/1) ... [2024-06-21 16:31:43,954 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:31:43" (1/1) ... [2024-06-21 16:31:43,956 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:31:43" (1/1) ... [2024-06-21 16:31:43,957 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:31:43" (1/1) ... [2024-06-21 16:31:43,960 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 16:31:43,961 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 16:31:43,961 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 16:31:43,961 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 16:31:43,961 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:31:43" (1/1) ... [2024-06-21 16:31:43,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 16:31:43,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 16:31:43,997 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) [2024-06-21 16:31:44,016 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 [2024-06-21 16:31:44,034 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 16:31:44,034 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 16:31:44,034 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 16:31:44,035 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 16:31:44,035 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 16:31:44,035 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 16:31:44,035 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 16:31:44,035 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 16:31:44,036 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-21 16:31:44,036 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-21 16:31:44,036 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 16:31:44,036 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 16:31:44,036 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 16:31:44,037 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 16:31:44,038 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 16:31:44,174 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 16:31:44,175 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 16:31:44,475 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 16:31:44,475 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 16:31:44,636 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 16:31:44,636 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 16:31:44,637 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 04:31:44 BoogieIcfgContainer [2024-06-21 16:31:44,637 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 16:31:44,640 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 16:31:44,640 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 16:31:44,642 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 16:31:44,643 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 04:31:43" (1/4) ... [2024-06-21 16:31:44,643 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5986876e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 04:31:44, skipping insertion in model container [2024-06-21 16:31:44,643 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 04:31:43" (2/4) ... [2024-06-21 16:31:44,643 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5986876e and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 04:31:44, skipping insertion in model container [2024-06-21 16:31:44,644 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:31:43" (3/4) ... [2024-06-21 16:31:44,644 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5986876e and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 04:31:44, skipping insertion in model container [2024-06-21 16:31:44,644 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 04:31:44" (4/4) ... [2024-06-21 16:31:44,645 INFO L112 eAbstractionObserver]: Analyzing ICFG mix020.opt.i [2024-06-21 16:31:44,658 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 16:31:44,658 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-21 16:31:44,659 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 16:31:44,700 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 16:31:44,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 65 places, 52 transitions, 120 flow [2024-06-21 16:31:44,758 INFO L124 PetriNetUnfolderBase]: 0/48 cut-off events. [2024-06-21 16:31:44,758 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 16:31:44,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61 conditions, 48 events. 0/48 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 80 event pairs, 0 based on Foata normal form. 0/44 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 16:31:44,760 INFO L82 GeneralOperation]: Start removeDead. Operand has 65 places, 52 transitions, 120 flow [2024-06-21 16:31:44,763 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 55 places, 42 transitions, 96 flow [2024-06-21 16:31:44,773 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 16:31:44,779 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;@2538ef1e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 16:31:44,779 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-21 16:31:44,784 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 16:31:44,784 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 16:31:44,784 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 16:31:44,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:31:44,785 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 16:31:44,785 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:31:44,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:31:44,789 INFO L85 PathProgramCache]: Analyzing trace with hash 415770089, now seen corresponding path program 1 times [2024-06-21 16:31:44,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:31:44,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259054708] [2024-06-21 16:31:44,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:31:44,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:31:45,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:31:45,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:31:45,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:31:45,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259054708] [2024-06-21 16:31:45,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259054708] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:31:45,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:31:45,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 16:31:45,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776301144] [2024-06-21 16:31:45,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:31:45,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 16:31:45,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:31:45,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 16:31:45,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 16:31:45,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 52 [2024-06-21 16:31:45,869 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 42 transitions, 96 flow. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:31:45,869 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:31:45,869 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 52 [2024-06-21 16:31:45,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:31:46,795 INFO L124 PetriNetUnfolderBase]: 6197/8801 cut-off events. [2024-06-21 16:31:46,796 INFO L125 PetriNetUnfolderBase]: For 122/122 co-relation queries the response was YES. [2024-06-21 16:31:46,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17547 conditions, 8801 events. 6197/8801 cut-off events. For 122/122 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 49701 event pairs, 4558 based on Foata normal form. 1/8524 useless extension candidates. Maximal degree in co-relation 17534. Up to 8479 conditions per place. [2024-06-21 16:31:46,840 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 41 selfloop transitions, 5 changer transitions 0/56 dead transitions. [2024-06-21 16:31:46,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 56 transitions, 225 flow [2024-06-21 16:31:46,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 16:31:46,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 16:31:46,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 101 transitions. [2024-06-21 16:31:46,862 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6474358974358975 [2024-06-21 16:31:46,863 INFO L175 Difference]: Start difference. First operand has 55 places, 42 transitions, 96 flow. Second operand 3 states and 101 transitions. [2024-06-21 16:31:46,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 56 transitions, 225 flow [2024-06-21 16:31:46,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 56 transitions, 218 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-21 16:31:46,870 INFO L231 Difference]: Finished difference. Result has 54 places, 46 transitions, 131 flow [2024-06-21 16:31:46,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=131, PETRI_PLACES=54, PETRI_TRANSITIONS=46} [2024-06-21 16:31:46,874 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -1 predicate places. [2024-06-21 16:31:46,874 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 46 transitions, 131 flow [2024-06-21 16:31:46,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:31:46,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:31:46,875 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:31:46,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 16:31:46,875 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:31:46,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:31:46,876 INFO L85 PathProgramCache]: Analyzing trace with hash 123126152, now seen corresponding path program 1 times [2024-06-21 16:31:46,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:31:46,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91271655] [2024-06-21 16:31:46,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:31:46,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:31:46,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:31:47,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:31:47,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:31:47,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91271655] [2024-06-21 16:31:47,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91271655] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:31:47,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:31:47,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 16:31:47,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302292801] [2024-06-21 16:31:47,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:31:47,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 16:31:47,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:31:47,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 16:31:47,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 16:31:47,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 52 [2024-06-21 16:31:47,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 46 transitions, 131 flow. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:31:47,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:31:47,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 52 [2024-06-21 16:31:47,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:31:48,368 INFO L124 PetriNetUnfolderBase]: 7092/9842 cut-off events. [2024-06-21 16:31:48,368 INFO L125 PetriNetUnfolderBase]: For 2062/2062 co-relation queries the response was YES. [2024-06-21 16:31:48,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22569 conditions, 9842 events. 7092/9842 cut-off events. For 2062/2062 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 54077 event pairs, 4490 based on Foata normal form. 4/9822 useless extension candidates. Maximal degree in co-relation 22557. Up to 9649 conditions per place. [2024-06-21 16:31:48,417 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 52 selfloop transitions, 9 changer transitions 0/70 dead transitions. [2024-06-21 16:31:48,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 70 transitions, 319 flow [2024-06-21 16:31:48,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 16:31:48,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 16:31:48,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 129 transitions. [2024-06-21 16:31:48,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6201923076923077 [2024-06-21 16:31:48,419 INFO L175 Difference]: Start difference. First operand has 54 places, 46 transitions, 131 flow. Second operand 4 states and 129 transitions. [2024-06-21 16:31:48,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 70 transitions, 319 flow [2024-06-21 16:31:48,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 70 transitions, 314 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 16:31:48,421 INFO L231 Difference]: Finished difference. Result has 57 places, 50 transitions, 179 flow [2024-06-21 16:31:48,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=179, PETRI_PLACES=57, PETRI_TRANSITIONS=50} [2024-06-21 16:31:48,422 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 2 predicate places. [2024-06-21 16:31:48,422 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 50 transitions, 179 flow [2024-06-21 16:31:48,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:31:48,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:31:48,423 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:31:48,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 16:31:48,423 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:31:48,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:31:48,424 INFO L85 PathProgramCache]: Analyzing trace with hash 150089667, now seen corresponding path program 1 times [2024-06-21 16:31:48,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:31:48,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104495260] [2024-06-21 16:31:48,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:31:48,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:31:48,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:31:49,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:31:49,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:31:49,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104495260] [2024-06-21 16:31:49,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104495260] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:31:49,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:31:49,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 16:31:49,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103365674] [2024-06-21 16:31:49,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:31:49,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 16:31:49,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:31:49,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 16:31:49,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 16:31:49,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 52 [2024-06-21 16:31:49,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 50 transitions, 179 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) [2024-06-21 16:31:49,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:31:49,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 52 [2024-06-21 16:31:49,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:31:50,561 INFO L124 PetriNetUnfolderBase]: 9006/12419 cut-off events. [2024-06-21 16:31:50,561 INFO L125 PetriNetUnfolderBase]: For 6995/6995 co-relation queries the response was YES. [2024-06-21 16:31:50,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31562 conditions, 12419 events. 9006/12419 cut-off events. For 6995/6995 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 66885 event pairs, 4478 based on Foata normal form. 8/12395 useless extension candidates. Maximal degree in co-relation 31548. Up to 12137 conditions per place. [2024-06-21 16:31:50,615 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 70 selfloop transitions, 16 changer transitions 0/94 dead transitions. [2024-06-21 16:31:50,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 94 transitions, 484 flow [2024-06-21 16:31:50,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:31:50,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:31:50,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 180 transitions. [2024-06-21 16:31:50,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5769230769230769 [2024-06-21 16:31:50,619 INFO L175 Difference]: Start difference. First operand has 57 places, 50 transitions, 179 flow. Second operand 6 states and 180 transitions. [2024-06-21 16:31:50,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 94 transitions, 484 flow [2024-06-21 16:31:50,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 94 transitions, 456 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-21 16:31:50,623 INFO L231 Difference]: Finished difference. Result has 61 places, 56 transitions, 241 flow [2024-06-21 16:31:50,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=241, PETRI_PLACES=61, PETRI_TRANSITIONS=56} [2024-06-21 16:31:50,624 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 6 predicate places. [2024-06-21 16:31:50,624 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 56 transitions, 241 flow [2024-06-21 16:31:50,625 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) [2024-06-21 16:31:50,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:31:50,625 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:31:50,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 16:31:50,625 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:31:50,626 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:31:50,626 INFO L85 PathProgramCache]: Analyzing trace with hash -251549614, now seen corresponding path program 1 times [2024-06-21 16:31:50,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:31:50,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983305086] [2024-06-21 16:31:50,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:31:50,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:31:50,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:31:51,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:31:51,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:31:51,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983305086] [2024-06-21 16:31:51,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983305086] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:31:51,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:31:51,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 16:31:51,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553996726] [2024-06-21 16:31:51,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:31:51,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 16:31:51,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:31:51,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 16:31:51,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 16:31:51,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-21 16:31:51,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 56 transitions, 241 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:31:51,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:31:51,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-21 16:31:51,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:31:52,490 INFO L124 PetriNetUnfolderBase]: 7847/11080 cut-off events. [2024-06-21 16:31:52,490 INFO L125 PetriNetUnfolderBase]: For 11293/11293 co-relation queries the response was YES. [2024-06-21 16:31:52,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30880 conditions, 11080 events. 7847/11080 cut-off events. For 11293/11293 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 61317 event pairs, 4266 based on Foata normal form. 3/10906 useless extension candidates. Maximal degree in co-relation 30863. Up to 10669 conditions per place. [2024-06-21 16:31:52,538 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 59 selfloop transitions, 10 changer transitions 0/77 dead transitions. [2024-06-21 16:31:52,538 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 77 transitions, 445 flow [2024-06-21 16:31:52,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 16:31:52,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 16:31:52,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 131 transitions. [2024-06-21 16:31:52,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5038461538461538 [2024-06-21 16:31:52,540 INFO L175 Difference]: Start difference. First operand has 61 places, 56 transitions, 241 flow. Second operand 5 states and 131 transitions. [2024-06-21 16:31:52,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 77 transitions, 445 flow [2024-06-21 16:31:52,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 77 transitions, 407 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-21 16:31:52,547 INFO L231 Difference]: Finished difference. Result has 63 places, 60 transitions, 264 flow [2024-06-21 16:31:52,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=203, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=264, PETRI_PLACES=63, PETRI_TRANSITIONS=60} [2024-06-21 16:31:52,548 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 8 predicate places. [2024-06-21 16:31:52,549 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 60 transitions, 264 flow [2024-06-21 16:31:52,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:31:52,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:31:52,549 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:31:52,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 16:31:52,549 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:31:52,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:31:52,550 INFO L85 PathProgramCache]: Analyzing trace with hash 820496926, now seen corresponding path program 1 times [2024-06-21 16:31:52,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:31:52,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116144135] [2024-06-21 16:31:52,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:31:52,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:31:52,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:31:53,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:31:53,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:31:53,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116144135] [2024-06-21 16:31:53,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116144135] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:31:53,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:31:53,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:31:53,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893103134] [2024-06-21 16:31:53,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:31:53,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:31:53,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:31:53,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:31:53,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:31:53,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-21 16:31:53,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 60 transitions, 264 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:31:53,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:31:53,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-21 16:31:53,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:31:54,793 INFO L124 PetriNetUnfolderBase]: 7880/11286 cut-off events. [2024-06-21 16:31:54,794 INFO L125 PetriNetUnfolderBase]: For 17923/17923 co-relation queries the response was YES. [2024-06-21 16:31:54,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33938 conditions, 11286 events. 7880/11286 cut-off events. For 17923/17923 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 63985 event pairs, 4072 based on Foata normal form. 7/11261 useless extension candidates. Maximal degree in co-relation 33919. Up to 10583 conditions per place. [2024-06-21 16:31:54,864 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 75 selfloop transitions, 22 changer transitions 0/105 dead transitions. [2024-06-21 16:31:54,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 105 transitions, 646 flow [2024-06-21 16:31:54,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:31:54,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:31:54,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 167 transitions. [2024-06-21 16:31:54,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5352564102564102 [2024-06-21 16:31:54,866 INFO L175 Difference]: Start difference. First operand has 63 places, 60 transitions, 264 flow. Second operand 6 states and 167 transitions. [2024-06-21 16:31:54,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 105 transitions, 646 flow [2024-06-21 16:31:54,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 105 transitions, 617 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-21 16:31:54,871 INFO L231 Difference]: Finished difference. Result has 68 places, 74 transitions, 405 flow [2024-06-21 16:31:54,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=235, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=405, PETRI_PLACES=68, PETRI_TRANSITIONS=74} [2024-06-21 16:31:54,871 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 13 predicate places. [2024-06-21 16:31:54,871 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 74 transitions, 405 flow [2024-06-21 16:31:54,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:31:54,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:31:54,872 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:31:54,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 16:31:54,872 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:31:54,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:31:54,873 INFO L85 PathProgramCache]: Analyzing trace with hash 702973063, now seen corresponding path program 1 times [2024-06-21 16:31:54,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:31:54,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737998424] [2024-06-21 16:31:54,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:31:54,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:31:54,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:31:55,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:31:55,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:31:55,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737998424] [2024-06-21 16:31:55,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737998424] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:31:55,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:31:55,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:31:55,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082521837] [2024-06-21 16:31:55,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:31:55,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:31:55,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:31:55,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:31:55,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:31:55,688 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-21 16:31:55,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 74 transitions, 405 flow. Second operand has 7 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:31:55,689 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:31:55,689 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-21 16:31:55,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:31:57,065 INFO L124 PetriNetUnfolderBase]: 9052/12512 cut-off events. [2024-06-21 16:31:57,065 INFO L125 PetriNetUnfolderBase]: For 34253/34263 co-relation queries the response was YES. [2024-06-21 16:31:57,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43473 conditions, 12512 events. 9052/12512 cut-off events. For 34253/34263 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 67348 event pairs, 4664 based on Foata normal form. 11/12512 useless extension candidates. Maximal degree in co-relation 43451. Up to 12214 conditions per place. [2024-06-21 16:31:57,144 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 84 selfloop transitions, 21 changer transitions 0/112 dead transitions. [2024-06-21 16:31:57,145 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 112 transitions, 789 flow [2024-06-21 16:31:57,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:31:57,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:31:57,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 159 transitions. [2024-06-21 16:31:57,146 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5096153846153846 [2024-06-21 16:31:57,146 INFO L175 Difference]: Start difference. First operand has 68 places, 74 transitions, 405 flow. Second operand 6 states and 159 transitions. [2024-06-21 16:31:57,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 112 transitions, 789 flow [2024-06-21 16:31:57,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 112 transitions, 767 flow, removed 10 selfloop flow, removed 1 redundant places. [2024-06-21 16:31:57,156 INFO L231 Difference]: Finished difference. Result has 73 places, 82 transitions, 512 flow [2024-06-21 16:31:57,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=383, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=512, PETRI_PLACES=73, PETRI_TRANSITIONS=82} [2024-06-21 16:31:57,158 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 18 predicate places. [2024-06-21 16:31:57,159 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 82 transitions, 512 flow [2024-06-21 16:31:57,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:31:57,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:31:57,159 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:31:57,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 16:31:57,159 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:31:57,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:31:57,160 INFO L85 PathProgramCache]: Analyzing trace with hash -304163297, now seen corresponding path program 2 times [2024-06-21 16:31:57,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:31:57,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264818790] [2024-06-21 16:31:57,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:31:57,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:31:57,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:31:57,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:31:57,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:31:57,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264818790] [2024-06-21 16:31:57,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264818790] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:31:57,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:31:57,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:31:57,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610580417] [2024-06-21 16:31:57,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:31:57,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:31:57,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:31:57,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:31:57,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:31:57,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-21 16:31:57,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 82 transitions, 512 flow. Second operand has 7 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:31:57,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:31:57,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-21 16:31:57,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:31:59,267 INFO L124 PetriNetUnfolderBase]: 9043/12501 cut-off events. [2024-06-21 16:31:59,268 INFO L125 PetriNetUnfolderBase]: For 46032/46039 co-relation queries the response was YES. [2024-06-21 16:31:59,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46589 conditions, 12501 events. 9043/12501 cut-off events. For 46032/46039 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 67321 event pairs, 4667 based on Foata normal form. 9/12499 useless extension candidates. Maximal degree in co-relation 46564. Up to 12205 conditions per place. [2024-06-21 16:31:59,336 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 78 selfloop transitions, 21 changer transitions 0/106 dead transitions. [2024-06-21 16:31:59,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 106 transitions, 772 flow [2024-06-21 16:31:59,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:31:59,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:31:59,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-21 16:31:59,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49038461538461536 [2024-06-21 16:31:59,337 INFO L175 Difference]: Start difference. First operand has 73 places, 82 transitions, 512 flow. Second operand 6 states and 153 transitions. [2024-06-21 16:31:59,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 106 transitions, 772 flow [2024-06-21 16:31:59,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 106 transitions, 714 flow, removed 24 selfloop flow, removed 2 redundant places. [2024-06-21 16:31:59,360 INFO L231 Difference]: Finished difference. Result has 77 places, 82 transitions, 507 flow [2024-06-21 16:31:59,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=454, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=507, PETRI_PLACES=77, PETRI_TRANSITIONS=82} [2024-06-21 16:31:59,361 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 22 predicate places. [2024-06-21 16:31:59,361 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 82 transitions, 507 flow [2024-06-21 16:31:59,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:31:59,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:31:59,361 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:31:59,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 16:31:59,361 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:31:59,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:31:59,362 INFO L85 PathProgramCache]: Analyzing trace with hash 438504451, now seen corresponding path program 1 times [2024-06-21 16:31:59,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:31:59,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105805912] [2024-06-21 16:31:59,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:31:59,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:31:59,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:32:00,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:32:00,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:32:00,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105805912] [2024-06-21 16:32:00,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105805912] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:32:00,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:32:00,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:32:00,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068014994] [2024-06-21 16:32:00,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:32:00,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:32:00,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:32:00,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:32:00,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:32:00,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-21 16:32:00,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 82 transitions, 507 flow. Second operand has 8 states, 8 states have (on average 14.375) internal successors, (115), 8 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:32:00,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:32:00,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-21 16:32:00,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:32:01,509 INFO L124 PetriNetUnfolderBase]: 9134/12639 cut-off events. [2024-06-21 16:32:01,509 INFO L125 PetriNetUnfolderBase]: For 51584/51588 co-relation queries the response was YES. [2024-06-21 16:32:01,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47521 conditions, 12639 events. 9134/12639 cut-off events. For 51584/51588 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 67994 event pairs, 4657 based on Foata normal form. 7/12636 useless extension candidates. Maximal degree in co-relation 47494. Up to 12307 conditions per place. [2024-06-21 16:32:01,563 INFO L140 encePairwiseOnDemand]: 37/52 looper letters, 102 selfloop transitions, 32 changer transitions 0/141 dead transitions. [2024-06-21 16:32:01,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 141 transitions, 1002 flow [2024-06-21 16:32:01,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:32:01,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:32:01,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-21 16:32:01,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4951923076923077 [2024-06-21 16:32:01,565 INFO L175 Difference]: Start difference. First operand has 77 places, 82 transitions, 507 flow. Second operand 8 states and 206 transitions. [2024-06-21 16:32:01,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 141 transitions, 1002 flow [2024-06-21 16:32:01,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 141 transitions, 928 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 16:32:01,584 INFO L231 Difference]: Finished difference. Result has 81 places, 101 transitions, 665 flow [2024-06-21 16:32:01,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=449, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=665, PETRI_PLACES=81, PETRI_TRANSITIONS=101} [2024-06-21 16:32:01,584 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 26 predicate places. [2024-06-21 16:32:01,584 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 101 transitions, 665 flow [2024-06-21 16:32:01,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.375) internal successors, (115), 8 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:32:01,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:32:01,585 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:32:01,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 16:32:01,585 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:32:01,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:32:01,586 INFO L85 PathProgramCache]: Analyzing trace with hash 797702809, now seen corresponding path program 2 times [2024-06-21 16:32:01,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:32:01,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852275761] [2024-06-21 16:32:01,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:32:01,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:32:01,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:32:02,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:32:02,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:32:02,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852275761] [2024-06-21 16:32:02,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852275761] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:32:02,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:32:02,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:32:02,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954740539] [2024-06-21 16:32:02,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:32:02,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:32:02,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:32:02,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:32:02,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:32:02,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-21 16:32:02,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 101 transitions, 665 flow. Second operand has 8 states, 8 states have (on average 14.375) internal successors, (115), 8 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:32:02,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:32:02,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-21 16:32:02,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:32:03,709 INFO L124 PetriNetUnfolderBase]: 9156/12672 cut-off events. [2024-06-21 16:32:03,709 INFO L125 PetriNetUnfolderBase]: For 65779/65787 co-relation queries the response was YES. [2024-06-21 16:32:03,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51083 conditions, 12672 events. 9156/12672 cut-off events. For 65779/65787 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 68254 event pairs, 4503 based on Foata normal form. 11/12672 useless extension candidates. Maximal degree in co-relation 51054. Up to 12314 conditions per place. [2024-06-21 16:32:03,788 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 102 selfloop transitions, 34 changer transitions 0/143 dead transitions. [2024-06-21 16:32:03,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 143 transitions, 1113 flow [2024-06-21 16:32:03,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:32:03,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:32:03,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-21 16:32:03,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49725274725274726 [2024-06-21 16:32:03,790 INFO L175 Difference]: Start difference. First operand has 81 places, 101 transitions, 665 flow. Second operand 7 states and 181 transitions. [2024-06-21 16:32:03,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 143 transitions, 1113 flow [2024-06-21 16:32:03,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 143 transitions, 1049 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-21 16:32:03,825 INFO L231 Difference]: Finished difference. Result has 85 places, 105 transitions, 742 flow [2024-06-21 16:32:03,825 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=601, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=742, PETRI_PLACES=85, PETRI_TRANSITIONS=105} [2024-06-21 16:32:03,825 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 30 predicate places. [2024-06-21 16:32:03,826 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 105 transitions, 742 flow [2024-06-21 16:32:03,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.375) internal successors, (115), 8 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:32:03,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:32:03,826 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:32:03,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 16:32:03,826 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:32:03,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:32:03,827 INFO L85 PathProgramCache]: Analyzing trace with hash 627005215, now seen corresponding path program 1 times [2024-06-21 16:32:03,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:32:03,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466427216] [2024-06-21 16:32:03,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:32:03,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:32:03,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:32:04,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:32:04,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:32:04,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466427216] [2024-06-21 16:32:04,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466427216] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:32:04,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:32:04,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:32:04,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24192318] [2024-06-21 16:32:04,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:32:04,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:32:04,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:32:04,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:32:04,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:32:04,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-21 16:32:04,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 105 transitions, 742 flow. Second operand has 8 states, 8 states have (on average 14.375) internal successors, (115), 8 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:32:04,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:32:04,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-21 16:32:04,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:32:06,501 INFO L124 PetriNetUnfolderBase]: 9312/12890 cut-off events. [2024-06-21 16:32:06,502 INFO L125 PetriNetUnfolderBase]: For 83665/83673 co-relation queries the response was YES. [2024-06-21 16:32:06,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55161 conditions, 12890 events. 9312/12890 cut-off events. For 83665/83673 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 69308 event pairs, 4186 based on Foata normal form. 15/12891 useless extension candidates. Maximal degree in co-relation 55131. Up to 12140 conditions per place. [2024-06-21 16:32:06,612 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 119 selfloop transitions, 43 changer transitions 0/169 dead transitions. [2024-06-21 16:32:06,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 169 transitions, 1496 flow [2024-06-21 16:32:06,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:32:06,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:32:06,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 198 transitions. [2024-06-21 16:32:06,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5439560439560439 [2024-06-21 16:32:06,613 INFO L175 Difference]: Start difference. First operand has 85 places, 105 transitions, 742 flow. Second operand 7 states and 198 transitions. [2024-06-21 16:32:06,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 169 transitions, 1496 flow [2024-06-21 16:32:06,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 169 transitions, 1365 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-06-21 16:32:06,661 INFO L231 Difference]: Finished difference. Result has 89 places, 120 transitions, 902 flow [2024-06-21 16:32:06,661 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=639, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=902, PETRI_PLACES=89, PETRI_TRANSITIONS=120} [2024-06-21 16:32:06,661 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 34 predicate places. [2024-06-21 16:32:06,661 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 120 transitions, 902 flow [2024-06-21 16:32:06,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.375) internal successors, (115), 8 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:32:06,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:32:06,662 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:32:06,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 16:32:06,662 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:32:06,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:32:06,663 INFO L85 PathProgramCache]: Analyzing trace with hash 317329295, now seen corresponding path program 3 times [2024-06-21 16:32:06,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:32:06,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567193242] [2024-06-21 16:32:06,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:32:06,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:32:06,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:32:07,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:32:07,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:32:07,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567193242] [2024-06-21 16:32:07,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567193242] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:32:07,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:32:07,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:32:07,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282417861] [2024-06-21 16:32:07,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:32:07,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:32:07,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:32:07,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:32:07,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:32:07,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-21 16:32:07,581 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 120 transitions, 902 flow. Second operand has 8 states, 8 states have (on average 14.375) internal successors, (115), 8 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:32:07,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:32:07,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-21 16:32:07,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:32:09,316 INFO L124 PetriNetUnfolderBase]: 9334/12951 cut-off events. [2024-06-21 16:32:09,316 INFO L125 PetriNetUnfolderBase]: For 89704/89716 co-relation queries the response was YES. [2024-06-21 16:32:09,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57616 conditions, 12951 events. 9334/12951 cut-off events. For 89704/89716 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 70046 event pairs, 4333 based on Foata normal form. 11/12948 useless extension candidates. Maximal degree in co-relation 57583. Up to 12464 conditions per place. [2024-06-21 16:32:09,410 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 107 selfloop transitions, 50 changer transitions 0/164 dead transitions. [2024-06-21 16:32:09,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 164 transitions, 1488 flow [2024-06-21 16:32:09,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:32:09,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:32:09,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 185 transitions. [2024-06-21 16:32:09,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5082417582417582 [2024-06-21 16:32:09,411 INFO L175 Difference]: Start difference. First operand has 89 places, 120 transitions, 902 flow. Second operand 7 states and 185 transitions. [2024-06-21 16:32:09,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 164 transitions, 1488 flow [2024-06-21 16:32:09,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 164 transitions, 1420 flow, removed 25 selfloop flow, removed 2 redundant places. [2024-06-21 16:32:09,471 INFO L231 Difference]: Finished difference. Result has 94 places, 128 transitions, 1061 flow [2024-06-21 16:32:09,471 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=834, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1061, PETRI_PLACES=94, PETRI_TRANSITIONS=128} [2024-06-21 16:32:09,471 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 39 predicate places. [2024-06-21 16:32:09,472 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 128 transitions, 1061 flow [2024-06-21 16:32:09,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.375) internal successors, (115), 8 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:32:09,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:32:09,472 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:32:09,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 16:32:09,472 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:32:09,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:32:09,473 INFO L85 PathProgramCache]: Analyzing trace with hash -839126607, now seen corresponding path program 2 times [2024-06-21 16:32:09,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:32:09,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621314024] [2024-06-21 16:32:09,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:32:09,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:32:09,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:32:10,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:32:10,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:32:10,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621314024] [2024-06-21 16:32:10,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621314024] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:32:10,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:32:10,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:32:10,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036284477] [2024-06-21 16:32:10,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:32:10,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:32:10,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:32:10,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:32:10,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:32:10,348 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-21 16:32:10,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 128 transitions, 1061 flow. Second operand has 8 states, 8 states have (on average 14.375) internal successors, (115), 8 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:32:10,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:32:10,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-21 16:32:10,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:32:11,918 INFO L124 PetriNetUnfolderBase]: 9398/13039 cut-off events. [2024-06-21 16:32:11,918 INFO L125 PetriNetUnfolderBase]: For 109293/109310 co-relation queries the response was YES. [2024-06-21 16:32:11,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61168 conditions, 13039 events. 9398/13039 cut-off events. For 109293/109310 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 70479 event pairs, 4159 based on Foata normal form. 21/13050 useless extension candidates. Maximal degree in co-relation 61133. Up to 12229 conditions per place. [2024-06-21 16:32:12,025 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 126 selfloop transitions, 50 changer transitions 0/183 dead transitions. [2024-06-21 16:32:12,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 183 transitions, 1808 flow [2024-06-21 16:32:12,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:32:12,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:32:12,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 194 transitions. [2024-06-21 16:32:12,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.532967032967033 [2024-06-21 16:32:12,027 INFO L175 Difference]: Start difference. First operand has 94 places, 128 transitions, 1061 flow. Second operand 7 states and 194 transitions. [2024-06-21 16:32:12,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 183 transitions, 1808 flow [2024-06-21 16:32:12,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 183 transitions, 1729 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-21 16:32:12,114 INFO L231 Difference]: Finished difference. Result has 99 places, 137 transitions, 1208 flow [2024-06-21 16:32:12,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=982, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1208, PETRI_PLACES=99, PETRI_TRANSITIONS=137} [2024-06-21 16:32:12,116 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 44 predicate places. [2024-06-21 16:32:12,116 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 137 transitions, 1208 flow [2024-06-21 16:32:12,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.375) internal successors, (115), 8 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:32:12,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:32:12,116 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:32:12,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 16:32:12,117 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:32:12,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:32:12,117 INFO L85 PathProgramCache]: Analyzing trace with hash 804373885, now seen corresponding path program 3 times [2024-06-21 16:32:12,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:32:12,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693502924] [2024-06-21 16:32:12,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:32:12,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:32:12,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:32:12,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:32:12,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:32:12,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693502924] [2024-06-21 16:32:12,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693502924] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:32:12,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:32:12,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:32:12,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267228973] [2024-06-21 16:32:12,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:32:12,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:32:12,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:32:12,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:32:12,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:32:12,919 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-21 16:32:12,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 137 transitions, 1208 flow. Second operand has 8 states, 8 states have (on average 14.375) internal successors, (115), 8 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:32:12,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:32:12,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-21 16:32:12,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:32:14,527 INFO L124 PetriNetUnfolderBase]: 9431/13081 cut-off events. [2024-06-21 16:32:14,527 INFO L125 PetriNetUnfolderBase]: For 129048/129065 co-relation queries the response was YES. [2024-06-21 16:32:14,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64135 conditions, 13081 events. 9431/13081 cut-off events. For 129048/129065 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 70661 event pairs, 4143 based on Foata normal form. 21/13092 useless extension candidates. Maximal degree in co-relation 64097. Up to 12263 conditions per place. [2024-06-21 16:32:14,641 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 118 selfloop transitions, 59 changer transitions 0/184 dead transitions. [2024-06-21 16:32:14,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 184 transitions, 1850 flow [2024-06-21 16:32:14,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:32:14,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:32:14,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 191 transitions. [2024-06-21 16:32:14,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5247252747252747 [2024-06-21 16:32:14,644 INFO L175 Difference]: Start difference. First operand has 99 places, 137 transitions, 1208 flow. Second operand 7 states and 191 transitions. [2024-06-21 16:32:14,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 184 transitions, 1850 flow [2024-06-21 16:32:14,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 184 transitions, 1745 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-21 16:32:14,739 INFO L231 Difference]: Finished difference. Result has 103 places, 142 transitions, 1303 flow [2024-06-21 16:32:14,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1107, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1303, PETRI_PLACES=103, PETRI_TRANSITIONS=142} [2024-06-21 16:32:14,740 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 48 predicate places. [2024-06-21 16:32:14,740 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 142 transitions, 1303 flow [2024-06-21 16:32:14,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.375) internal successors, (115), 8 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:32:14,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:32:14,740 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:32:14,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 16:32:14,740 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:32:14,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:32:14,740 INFO L85 PathProgramCache]: Analyzing trace with hash 804136549, now seen corresponding path program 4 times [2024-06-21 16:32:14,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:32:14,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352860464] [2024-06-21 16:32:14,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:32:14,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:32:14,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:32:15,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:32:15,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:32:15,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352860464] [2024-06-21 16:32:15,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352860464] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:32:15,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:32:15,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:32:15,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603220562] [2024-06-21 16:32:15,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:32:15,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:32:15,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:32:15,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:32:15,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:32:15,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-21 16:32:15,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 142 transitions, 1303 flow. Second operand has 8 states, 8 states have (on average 14.375) internal successors, (115), 8 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:32:15,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:32:15,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-21 16:32:15,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:32:17,172 INFO L124 PetriNetUnfolderBase]: 9422/13081 cut-off events. [2024-06-21 16:32:17,172 INFO L125 PetriNetUnfolderBase]: For 145593/145597 co-relation queries the response was YES. [2024-06-21 16:32:17,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65632 conditions, 13081 events. 9422/13081 cut-off events. For 145593/145597 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 70825 event pairs, 4352 based on Foata normal form. 3/13064 useless extension candidates. Maximal degree in co-relation 65592. Up to 12585 conditions per place. [2024-06-21 16:32:17,284 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 116 selfloop transitions, 50 changer transitions 0/173 dead transitions. [2024-06-21 16:32:17,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 173 transitions, 1733 flow [2024-06-21 16:32:17,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:32:17,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:32:17,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-21 16:32:17,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49175824175824173 [2024-06-21 16:32:17,286 INFO L175 Difference]: Start difference. First operand has 103 places, 142 transitions, 1303 flow. Second operand 7 states and 179 transitions. [2024-06-21 16:32:17,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 173 transitions, 1733 flow [2024-06-21 16:32:17,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 173 transitions, 1592 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-21 16:32:17,404 INFO L231 Difference]: Finished difference. Result has 106 places, 142 transitions, 1273 flow [2024-06-21 16:32:17,405 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1162, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1273, PETRI_PLACES=106, PETRI_TRANSITIONS=142} [2024-06-21 16:32:17,405 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 51 predicate places. [2024-06-21 16:32:17,405 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 142 transitions, 1273 flow [2024-06-21 16:32:17,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.375) internal successors, (115), 8 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:32:17,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:32:17,405 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:32:17,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 16:32:17,406 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:32:17,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:32:17,406 INFO L85 PathProgramCache]: Analyzing trace with hash -1776403299, now seen corresponding path program 1 times [2024-06-21 16:32:17,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:32:17,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178653367] [2024-06-21 16:32:17,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:32:17,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:32:17,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:32:18,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:32:18,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:32:18,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178653367] [2024-06-21 16:32:18,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178653367] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:32:18,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:32:18,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:32:18,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280867073] [2024-06-21 16:32:18,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:32:18,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:32:18,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:32:18,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:32:18,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:32:18,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-21 16:32:18,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 142 transitions, 1273 flow. Second operand has 8 states, 8 states have (on average 15.375) internal successors, (123), 8 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:32:18,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:32:18,261 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-21 16:32:18,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:32:19,678 INFO L124 PetriNetUnfolderBase]: 8418/12113 cut-off events. [2024-06-21 16:32:19,678 INFO L125 PetriNetUnfolderBase]: For 138081/138083 co-relation queries the response was YES. [2024-06-21 16:32:19,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60080 conditions, 12113 events. 8418/12113 cut-off events. For 138081/138083 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 69209 event pairs, 3568 based on Foata normal form. 26/12112 useless extension candidates. Maximal degree in co-relation 60039. Up to 11139 conditions per place. [2024-06-21 16:32:19,779 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 155 selfloop transitions, 25 changer transitions 0/188 dead transitions. [2024-06-21 16:32:19,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 188 transitions, 1919 flow [2024-06-21 16:32:19,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:32:19,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:32:19,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 196 transitions. [2024-06-21 16:32:19,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5384615384615384 [2024-06-21 16:32:19,781 INFO L175 Difference]: Start difference. First operand has 106 places, 142 transitions, 1273 flow. Second operand 7 states and 196 transitions. [2024-06-21 16:32:19,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 188 transitions, 1919 flow [2024-06-21 16:32:19,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 188 transitions, 1783 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-21 16:32:19,932 INFO L231 Difference]: Finished difference. Result has 107 places, 145 transitions, 1256 flow [2024-06-21 16:32:19,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1137, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1256, PETRI_PLACES=107, PETRI_TRANSITIONS=145} [2024-06-21 16:32:19,932 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 52 predicate places. [2024-06-21 16:32:19,933 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 145 transitions, 1256 flow [2024-06-21 16:32:19,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.375) internal successors, (123), 8 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:32:19,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:32:19,933 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:32:19,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 16:32:19,933 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:32:19,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:32:19,933 INFO L85 PathProgramCache]: Analyzing trace with hash 367679508, now seen corresponding path program 1 times [2024-06-21 16:32:19,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:32:19,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301670434] [2024-06-21 16:32:19,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:32:19,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:32:19,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:32:20,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:32:20,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:32:20,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301670434] [2024-06-21 16:32:20,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301670434] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:32:20,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:32:20,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 16:32:20,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483606413] [2024-06-21 16:32:20,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:32:20,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 16:32:20,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:32:20,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 16:32:20,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 16:32:20,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 52 [2024-06-21 16:32:20,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 145 transitions, 1256 flow. Second operand has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:32:20,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:32:20,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 52 [2024-06-21 16:32:20,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:32:21,816 INFO L124 PetriNetUnfolderBase]: 7960/11641 cut-off events. [2024-06-21 16:32:21,816 INFO L125 PetriNetUnfolderBase]: For 151342/151359 co-relation queries the response was YES. [2024-06-21 16:32:21,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60093 conditions, 11641 events. 7960/11641 cut-off events. For 151342/151359 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 68412 event pairs, 3697 based on Foata normal form. 19/11641 useless extension candidates. Maximal degree in co-relation 60051. Up to 10734 conditions per place. [2024-06-21 16:32:21,930 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 131 selfloop transitions, 10 changer transitions 0/160 dead transitions. [2024-06-21 16:32:21,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 160 transitions, 1584 flow [2024-06-21 16:32:21,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 16:32:21,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 16:32:21,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 132 transitions. [2024-06-21 16:32:21,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5076923076923077 [2024-06-21 16:32:21,931 INFO L175 Difference]: Start difference. First operand has 107 places, 145 transitions, 1256 flow. Second operand 5 states and 132 transitions. [2024-06-21 16:32:21,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 160 transitions, 1584 flow [2024-06-21 16:32:22,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 160 transitions, 1487 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-21 16:32:22,075 INFO L231 Difference]: Finished difference. Result has 107 places, 145 transitions, 1188 flow [2024-06-21 16:32:22,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1159, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1188, PETRI_PLACES=107, PETRI_TRANSITIONS=145} [2024-06-21 16:32:22,075 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 52 predicate places. [2024-06-21 16:32:22,076 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 145 transitions, 1188 flow [2024-06-21 16:32:22,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:32:22,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:32:22,076 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:32:22,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 16:32:22,076 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:32:22,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:32:22,076 INFO L85 PathProgramCache]: Analyzing trace with hash -2041398643, now seen corresponding path program 1 times [2024-06-21 16:32:22,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:32:22,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356920729] [2024-06-21 16:32:22,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:32:22,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:32:22,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:32:22,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:32:22,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:32:22,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356920729] [2024-06-21 16:32:22,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356920729] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:32:22,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:32:22,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:32:22,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061181243] [2024-06-21 16:32:22,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:32:22,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:32:22,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:32:22,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:32:22,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:32:23,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-21 16:32:23,057 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 145 transitions, 1188 flow. Second operand has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:32:23,057 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:32:23,057 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-21 16:32:23,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:32:24,740 INFO L124 PetriNetUnfolderBase]: 9710/13513 cut-off events. [2024-06-21 16:32:24,740 INFO L125 PetriNetUnfolderBase]: For 192409/192417 co-relation queries the response was YES. [2024-06-21 16:32:24,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70826 conditions, 13513 events. 9710/13513 cut-off events. For 192409/192417 co-relation queries the response was YES. Maximal size of possible extension queue 467. Compared 73709 event pairs, 4096 based on Foata normal form. 15/13524 useless extension candidates. Maximal degree in co-relation 70783. Up to 12842 conditions per place. [2024-06-21 16:32:24,855 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 160 selfloop transitions, 48 changer transitions 0/215 dead transitions. [2024-06-21 16:32:24,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 215 transitions, 2130 flow [2024-06-21 16:32:24,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:32:24,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:32:24,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 222 transitions. [2024-06-21 16:32:24,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5336538461538461 [2024-06-21 16:32:24,856 INFO L175 Difference]: Start difference. First operand has 107 places, 145 transitions, 1188 flow. Second operand 8 states and 222 transitions. [2024-06-21 16:32:24,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 215 transitions, 2130 flow [2024-06-21 16:32:24,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 215 transitions, 2101 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-21 16:32:24,996 INFO L231 Difference]: Finished difference. Result has 113 places, 159 transitions, 1489 flow [2024-06-21 16:32:24,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1159, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1489, PETRI_PLACES=113, PETRI_TRANSITIONS=159} [2024-06-21 16:32:24,996 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 58 predicate places. [2024-06-21 16:32:24,996 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 159 transitions, 1489 flow [2024-06-21 16:32:24,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:32:24,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:32:24,997 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:32:24,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 16:32:24,997 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:32:24,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:32:24,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1247274561, now seen corresponding path program 2 times [2024-06-21 16:32:24,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:32:24,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753874892] [2024-06-21 16:32:24,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:32:24,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:32:25,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:32:25,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:32:25,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:32:25,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753874892] [2024-06-21 16:32:25,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753874892] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:32:25,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:32:25,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:32:25,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449990478] [2024-06-21 16:32:25,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:32:25,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:32:25,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:32:25,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:32:25,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:32:25,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-21 16:32:25,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 159 transitions, 1489 flow. Second operand has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:32:25,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:32:25,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-21 16:32:25,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:32:27,763 INFO L124 PetriNetUnfolderBase]: 9897/13822 cut-off events. [2024-06-21 16:32:27,763 INFO L125 PetriNetUnfolderBase]: For 234613/234615 co-relation queries the response was YES. [2024-06-21 16:32:27,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77959 conditions, 13822 events. 9897/13822 cut-off events. For 234613/234615 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 76176 event pairs, 3995 based on Foata normal form. 7/13818 useless extension candidates. Maximal degree in co-relation 77914. Up to 12317 conditions per place. [2024-06-21 16:32:27,892 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 136 selfloop transitions, 88 changer transitions 0/231 dead transitions. [2024-06-21 16:32:27,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 231 transitions, 2679 flow [2024-06-21 16:32:27,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:32:27,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:32:27,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 230 transitions. [2024-06-21 16:32:27,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5528846153846154 [2024-06-21 16:32:27,894 INFO L175 Difference]: Start difference. First operand has 113 places, 159 transitions, 1489 flow. Second operand 8 states and 230 transitions. [2024-06-21 16:32:27,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 231 transitions, 2679 flow [2024-06-21 16:32:28,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 231 transitions, 2530 flow, removed 47 selfloop flow, removed 4 redundant places. [2024-06-21 16:32:28,109 INFO L231 Difference]: Finished difference. Result has 118 places, 173 transitions, 1749 flow [2024-06-21 16:32:28,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1340, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1749, PETRI_PLACES=118, PETRI_TRANSITIONS=173} [2024-06-21 16:32:28,109 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 63 predicate places. [2024-06-21 16:32:28,109 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 173 transitions, 1749 flow [2024-06-21 16:32:28,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:32:28,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:32:28,110 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:32:28,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 16:32:28,110 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:32:28,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:32:28,110 INFO L85 PathProgramCache]: Analyzing trace with hash -2037673993, now seen corresponding path program 3 times [2024-06-21 16:32:28,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:32:28,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406788269] [2024-06-21 16:32:28,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:32:28,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:32:28,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:32:28,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:32:28,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:32:28,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406788269] [2024-06-21 16:32:28,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406788269] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:32:28,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:32:28,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:32:28,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623316] [2024-06-21 16:32:28,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:32:28,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:32:28,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:32:28,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:32:28,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:32:29,038 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-21 16:32:29,039 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 173 transitions, 1749 flow. Second operand has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:32:29,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:32:29,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-21 16:32:29,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:32:31,011 INFO L124 PetriNetUnfolderBase]: 9930/13878 cut-off events. [2024-06-21 16:32:31,012 INFO L125 PetriNetUnfolderBase]: For 271701/271703 co-relation queries the response was YES. [2024-06-21 16:32:31,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83012 conditions, 13878 events. 9930/13878 cut-off events. For 271701/271703 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 76687 event pairs, 3981 based on Foata normal form. 7/13874 useless extension candidates. Maximal degree in co-relation 82965. Up to 12351 conditions per place. [2024-06-21 16:32:31,162 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 127 selfloop transitions, 98 changer transitions 0/232 dead transitions. [2024-06-21 16:32:31,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 232 transitions, 2727 flow [2024-06-21 16:32:31,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:32:31,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:32:31,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 227 transitions. [2024-06-21 16:32:31,163 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5456730769230769 [2024-06-21 16:32:31,163 INFO L175 Difference]: Start difference. First operand has 118 places, 173 transitions, 1749 flow. Second operand 8 states and 227 transitions. [2024-06-21 16:32:31,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 232 transitions, 2727 flow [2024-06-21 16:32:31,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 232 transitions, 2550 flow, removed 65 selfloop flow, removed 3 redundant places. [2024-06-21 16:32:31,402 INFO L231 Difference]: Finished difference. Result has 123 places, 178 transitions, 1874 flow [2024-06-21 16:32:31,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1592, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1874, PETRI_PLACES=123, PETRI_TRANSITIONS=178} [2024-06-21 16:32:31,402 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 68 predicate places. [2024-06-21 16:32:31,402 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 178 transitions, 1874 flow [2024-06-21 16:32:31,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:32:31,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:32:31,403 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:32:31,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 16:32:31,403 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:32:31,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:32:31,403 INFO L85 PathProgramCache]: Analyzing trace with hash -963466599, now seen corresponding path program 4 times [2024-06-21 16:32:31,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:32:31,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483086279] [2024-06-21 16:32:31,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:32:31,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:32:31,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:32:32,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:32:32,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:32:32,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483086279] [2024-06-21 16:32:32,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483086279] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:32:32,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:32:32,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:32:32,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63861380] [2024-06-21 16:32:32,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:32:32,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:32:32,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:32:32,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:32:32,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:32:32,299 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-21 16:32:32,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 178 transitions, 1874 flow. Second operand has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:32:32,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:32:32,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-21 16:32:32,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:32:34,213 INFO L124 PetriNetUnfolderBase]: 10071/14102 cut-off events. [2024-06-21 16:32:34,213 INFO L125 PetriNetUnfolderBase]: For 290826/290830 co-relation queries the response was YES. [2024-06-21 16:32:34,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84373 conditions, 14102 events. 10071/14102 cut-off events. For 290826/290830 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 78216 event pairs, 3974 based on Foata normal form. 7/14095 useless extension candidates. Maximal degree in co-relation 84324. Up to 12476 conditions per place. [2024-06-21 16:32:34,340 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 134 selfloop transitions, 102 changer transitions 0/243 dead transitions. [2024-06-21 16:32:34,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 243 transitions, 3088 flow [2024-06-21 16:32:34,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:32:34,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:32:34,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 227 transitions. [2024-06-21 16:32:34,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5456730769230769 [2024-06-21 16:32:34,341 INFO L175 Difference]: Start difference. First operand has 123 places, 178 transitions, 1874 flow. Second operand 8 states and 227 transitions. [2024-06-21 16:32:34,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 243 transitions, 3088 flow [2024-06-21 16:32:34,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 243 transitions, 2868 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-21 16:32:34,573 INFO L231 Difference]: Finished difference. Result has 128 places, 189 transitions, 2117 flow [2024-06-21 16:32:34,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1670, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2117, PETRI_PLACES=128, PETRI_TRANSITIONS=189} [2024-06-21 16:32:34,573 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 73 predicate places. [2024-06-21 16:32:34,573 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 189 transitions, 2117 flow [2024-06-21 16:32:34,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:32:34,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:32:34,574 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:32:34,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 16:32:34,574 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:32:34,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:32:34,574 INFO L85 PathProgramCache]: Analyzing trace with hash 1391372481, now seen corresponding path program 5 times [2024-06-21 16:32:34,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:32:34,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047204387] [2024-06-21 16:32:34,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:32:34,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:32:34,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:32:35,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:32:35,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:32:35,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047204387] [2024-06-21 16:32:35,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047204387] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:32:35,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:32:35,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:32:35,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035183958] [2024-06-21 16:32:35,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:32:35,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:32:35,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:32:35,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:32:35,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:32:35,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-21 16:32:35,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 189 transitions, 2117 flow. Second operand has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:32:35,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:32:35,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-21 16:32:35,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:32:37,587 INFO L124 PetriNetUnfolderBase]: 10104/14160 cut-off events. [2024-06-21 16:32:37,587 INFO L125 PetriNetUnfolderBase]: For 331178/331182 co-relation queries the response was YES. [2024-06-21 16:32:37,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87595 conditions, 14160 events. 10104/14160 cut-off events. For 331178/331182 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 78487 event pairs, 3937 based on Foata normal form. 7/14153 useless extension candidates. Maximal degree in co-relation 87543. Up to 12510 conditions per place. [2024-06-21 16:32:37,709 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 117 selfloop transitions, 120 changer transitions 0/244 dead transitions. [2024-06-21 16:32:37,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 244 transitions, 3099 flow [2024-06-21 16:32:37,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:32:37,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:32:37,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 223 transitions. [2024-06-21 16:32:37,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5360576923076923 [2024-06-21 16:32:37,711 INFO L175 Difference]: Start difference. First operand has 128 places, 189 transitions, 2117 flow. Second operand 8 states and 223 transitions. [2024-06-21 16:32:37,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 244 transitions, 3099 flow [2024-06-21 16:32:37,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 244 transitions, 2733 flow, removed 57 selfloop flow, removed 6 redundant places. [2024-06-21 16:32:37,958 INFO L231 Difference]: Finished difference. Result has 130 places, 194 transitions, 2105 flow [2024-06-21 16:32:37,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1767, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2105, PETRI_PLACES=130, PETRI_TRANSITIONS=194} [2024-06-21 16:32:37,958 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 75 predicate places. [2024-06-21 16:32:37,959 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 194 transitions, 2105 flow [2024-06-21 16:32:37,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:32:37,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:32:37,959 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:32:37,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 16:32:37,959 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:32:37,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:32:37,959 INFO L85 PathProgramCache]: Analyzing trace with hash -841569749, now seen corresponding path program 6 times [2024-06-21 16:32:37,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:32:37,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455232347] [2024-06-21 16:32:37,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:32:37,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:32:37,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:32:38,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:32:38,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:32:38,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455232347] [2024-06-21 16:32:38,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455232347] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:32:38,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:32:38,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:32:38,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931013648] [2024-06-21 16:32:38,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:32:38,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:32:38,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:32:38,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:32:38,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:32:38,869 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-21 16:32:38,869 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 194 transitions, 2105 flow. Second operand has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:32:38,869 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:32:38,869 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-21 16:32:38,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:32:40,838 INFO L124 PetriNetUnfolderBase]: 10091/14144 cut-off events. [2024-06-21 16:32:40,838 INFO L125 PetriNetUnfolderBase]: For 347684/347688 co-relation queries the response was YES. [2024-06-21 16:32:40,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87635 conditions, 14144 events. 10091/14144 cut-off events. For 347684/347688 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 78533 event pairs, 3979 based on Foata normal form. 7/14137 useless extension candidates. Maximal degree in co-relation 87583. Up to 12503 conditions per place. [2024-06-21 16:32:40,996 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 133 selfloop transitions, 105 changer transitions 0/245 dead transitions. [2024-06-21 16:32:40,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 245 transitions, 3047 flow [2024-06-21 16:32:40,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:32:40,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:32:40,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 224 transitions. [2024-06-21 16:32:40,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5384615384615384 [2024-06-21 16:32:40,997 INFO L175 Difference]: Start difference. First operand has 130 places, 194 transitions, 2105 flow. Second operand 8 states and 224 transitions. [2024-06-21 16:32:40,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 245 transitions, 3047 flow [2024-06-21 16:32:41,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 245 transitions, 2775 flow, removed 51 selfloop flow, removed 5 redundant places. [2024-06-21 16:32:41,355 INFO L231 Difference]: Finished difference. Result has 133 places, 194 transitions, 2056 flow [2024-06-21 16:32:41,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1833, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2056, PETRI_PLACES=133, PETRI_TRANSITIONS=194} [2024-06-21 16:32:41,355 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 78 predicate places. [2024-06-21 16:32:41,355 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 194 transitions, 2056 flow [2024-06-21 16:32:41,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:32:41,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:32:41,356 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:32:41,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 16:32:41,356 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:32:41,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:32:41,356 INFO L85 PathProgramCache]: Analyzing trace with hash -1017697770, now seen corresponding path program 1 times [2024-06-21 16:32:41,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:32:41,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234337850] [2024-06-21 16:32:41,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:32:41,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:32:41,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:32:42,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:32:42,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:32:42,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234337850] [2024-06-21 16:32:42,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234337850] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:32:42,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:32:42,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:32:42,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825609836] [2024-06-21 16:32:42,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:32:42,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:32:42,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:32:42,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:32:42,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:32:42,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-21 16:32:42,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 194 transitions, 2056 flow. Second operand has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:32:42,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:32:42,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-21 16:32:42,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:32:44,146 INFO L124 PetriNetUnfolderBase]: 10178/14255 cut-off events. [2024-06-21 16:32:44,146 INFO L125 PetriNetUnfolderBase]: For 372918/372926 co-relation queries the response was YES. [2024-06-21 16:32:44,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89659 conditions, 14255 events. 10178/14255 cut-off events. For 372918/372926 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 78814 event pairs, 3275 based on Foata normal form. 14/14267 useless extension candidates. Maximal degree in co-relation 89606. Up to 13554 conditions per place. [2024-06-21 16:32:44,275 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 207 selfloop transitions, 43 changer transitions 0/257 dead transitions. [2024-06-21 16:32:44,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 257 transitions, 3026 flow [2024-06-21 16:32:44,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:32:44,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:32:44,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 233 transitions. [2024-06-21 16:32:44,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49786324786324787 [2024-06-21 16:32:44,276 INFO L175 Difference]: Start difference. First operand has 133 places, 194 transitions, 2056 flow. Second operand 9 states and 233 transitions. [2024-06-21 16:32:44,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 257 transitions, 3026 flow [2024-06-21 16:32:44,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 257 transitions, 2794 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-21 16:32:44,555 INFO L231 Difference]: Finished difference. Result has 135 places, 200 transitions, 2090 flow [2024-06-21 16:32:44,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1824, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2090, PETRI_PLACES=135, PETRI_TRANSITIONS=200} [2024-06-21 16:32:44,556 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 80 predicate places. [2024-06-21 16:32:44,556 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 200 transitions, 2090 flow [2024-06-21 16:32:44,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:32:44,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:32:44,556 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:32:44,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 16:32:44,557 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:32:44,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:32:44,557 INFO L85 PathProgramCache]: Analyzing trace with hash 1141147586, now seen corresponding path program 2 times [2024-06-21 16:32:44,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:32:44,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866661213] [2024-06-21 16:32:44,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:32:44,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:32:44,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:32:45,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:32:45,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:32:45,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866661213] [2024-06-21 16:32:45,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866661213] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:32:45,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:32:45,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:32:45,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473081818] [2024-06-21 16:32:45,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:32:45,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:32:45,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:32:45,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:32:45,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:32:45,508 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-21 16:32:45,509 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 200 transitions, 2090 flow. Second operand has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:32:45,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:32:45,509 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-21 16:32:45,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:32:47,386 INFO L124 PetriNetUnfolderBase]: 10163/14234 cut-off events. [2024-06-21 16:32:47,387 INFO L125 PetriNetUnfolderBase]: For 404861/404869 co-relation queries the response was YES. [2024-06-21 16:32:47,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90622 conditions, 14234 events. 10163/14234 cut-off events. For 404861/404869 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 78797 event pairs, 3903 based on Foata normal form. 14/14246 useless extension candidates. Maximal degree in co-relation 90569. Up to 13640 conditions per place. [2024-06-21 16:32:47,531 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 202 selfloop transitions, 37 changer transitions 0/246 dead transitions. [2024-06-21 16:32:47,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 246 transitions, 2720 flow [2024-06-21 16:32:47,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:32:47,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:32:47,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-21 16:32:47,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49278846153846156 [2024-06-21 16:32:47,532 INFO L175 Difference]: Start difference. First operand has 135 places, 200 transitions, 2090 flow. Second operand 8 states and 205 transitions. [2024-06-21 16:32:47,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 246 transitions, 2720 flow [2024-06-21 16:32:48,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 246 transitions, 2531 flow, removed 74 selfloop flow, removed 5 redundant places. [2024-06-21 16:32:48,003 INFO L231 Difference]: Finished difference. Result has 138 places, 200 transitions, 1986 flow [2024-06-21 16:32:48,003 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1901, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1986, PETRI_PLACES=138, PETRI_TRANSITIONS=200} [2024-06-21 16:32:48,004 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 83 predicate places. [2024-06-21 16:32:48,004 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 200 transitions, 1986 flow [2024-06-21 16:32:48,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:32:48,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:32:48,004 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:32:48,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 16:32:48,004 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:32:48,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:32:48,004 INFO L85 PathProgramCache]: Analyzing trace with hash 10801806, now seen corresponding path program 3 times [2024-06-21 16:32:48,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:32:48,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791200290] [2024-06-21 16:32:48,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:32:48,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:32:48,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:32:48,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:32:48,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:32:48,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791200290] [2024-06-21 16:32:48,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791200290] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:32:48,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:32:48,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:32:48,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854210022] [2024-06-21 16:32:48,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:32:48,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:32:48,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:32:48,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:32:48,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:32:48,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-21 16:32:48,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 200 transitions, 1986 flow. Second operand has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:32:48,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:32:48,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-21 16:32:48,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:32:50,928 INFO L124 PetriNetUnfolderBase]: 10199/14285 cut-off events. [2024-06-21 16:32:50,928 INFO L125 PetriNetUnfolderBase]: For 428870/428882 co-relation queries the response was YES. [2024-06-21 16:32:51,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91622 conditions, 14285 events. 10199/14285 cut-off events. For 428870/428882 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 79105 event pairs, 3916 based on Foata normal form. 14/14296 useless extension candidates. Maximal degree in co-relation 91567. Up to 13617 conditions per place. [2024-06-21 16:32:51,078 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 184 selfloop transitions, 53 changer transitions 0/244 dead transitions. [2024-06-21 16:32:51,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 244 transitions, 2676 flow [2024-06-21 16:32:51,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:32:51,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:32:51,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-21 16:32:51,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4951923076923077 [2024-06-21 16:32:51,079 INFO L175 Difference]: Start difference. First operand has 138 places, 200 transitions, 1986 flow. Second operand 8 states and 206 transitions. [2024-06-21 16:32:51,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 244 transitions, 2676 flow [2024-06-21 16:32:51,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 244 transitions, 2592 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-21 16:32:51,474 INFO L231 Difference]: Finished difference. Result has 139 places, 203 transitions, 2112 flow [2024-06-21 16:32:51,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1902, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2112, PETRI_PLACES=139, PETRI_TRANSITIONS=203} [2024-06-21 16:32:51,475 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 84 predicate places. [2024-06-21 16:32:51,475 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 203 transitions, 2112 flow [2024-06-21 16:32:51,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:32:51,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:32:51,475 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:32:51,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 16:32:51,475 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:32:51,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:32:51,476 INFO L85 PathProgramCache]: Analyzing trace with hash 10986504, now seen corresponding path program 1 times [2024-06-21 16:32:51,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:32:51,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377079444] [2024-06-21 16:32:51,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:32:51,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:32:51,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:32:52,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:32:52,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:32:52,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377079444] [2024-06-21 16:32:52,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377079444] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:32:52,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:32:52,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:32:52,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115384263] [2024-06-21 16:32:52,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:32:52,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:32:52,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:32:52,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:32:52,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:32:52,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-21 16:32:52,456 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 203 transitions, 2112 flow. Second operand has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:32:52,456 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:32:52,456 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-21 16:32:52,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:32:54,567 INFO L124 PetriNetUnfolderBase]: 10396/14566 cut-off events. [2024-06-21 16:32:54,567 INFO L125 PetriNetUnfolderBase]: For 480201/480209 co-relation queries the response was YES. [2024-06-21 16:32:54,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95585 conditions, 14566 events. 10396/14566 cut-off events. For 480201/480209 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 80788 event pairs, 3802 based on Foata normal form. 34/14589 useless extension candidates. Maximal degree in co-relation 95529. Up to 13428 conditions per place. [2024-06-21 16:32:54,700 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 200 selfloop transitions, 57 changer transitions 0/264 dead transitions. [2024-06-21 16:32:54,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 264 transitions, 3176 flow [2024-06-21 16:32:54,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:32:54,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:32:54,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 225 transitions. [2024-06-21 16:32:54,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5408653846153846 [2024-06-21 16:32:54,702 INFO L175 Difference]: Start difference. First operand has 139 places, 203 transitions, 2112 flow. Second operand 8 states and 225 transitions. [2024-06-21 16:32:54,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 264 transitions, 3176 flow [2024-06-21 16:32:55,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 264 transitions, 2992 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-06-21 16:32:55,011 INFO L231 Difference]: Finished difference. Result has 141 places, 206 transitions, 2135 flow [2024-06-21 16:32:55,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1928, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2135, PETRI_PLACES=141, PETRI_TRANSITIONS=206} [2024-06-21 16:32:55,012 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 86 predicate places. [2024-06-21 16:32:55,012 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 206 transitions, 2135 flow [2024-06-21 16:32:55,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:32:55,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:32:55,012 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:32:55,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 16:32:55,012 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:32:55,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:32:55,013 INFO L85 PathProgramCache]: Analyzing trace with hash 282422417, now seen corresponding path program 1 times [2024-06-21 16:32:55,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:32:55,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773406089] [2024-06-21 16:32:55,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:32:55,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:32:55,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:32:55,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:32:55,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:32:55,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773406089] [2024-06-21 16:32:55,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773406089] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:32:55,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:32:55,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:32:55,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998325492] [2024-06-21 16:32:55,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:32:55,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:32:55,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:32:55,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:32:55,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:32:55,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-21 16:32:55,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 206 transitions, 2135 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 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) [2024-06-21 16:32:55,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:32:55,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-21 16:32:55,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:32:57,501 INFO L124 PetriNetUnfolderBase]: 9846/14035 cut-off events. [2024-06-21 16:32:57,501 INFO L125 PetriNetUnfolderBase]: For 503035/503078 co-relation queries the response was YES. [2024-06-21 16:32:57,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95271 conditions, 14035 events. 9846/14035 cut-off events. For 503035/503078 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 80546 event pairs, 3822 based on Foata normal form. 31/14055 useless extension candidates. Maximal degree in co-relation 95214. Up to 13120 conditions per place. [2024-06-21 16:32:57,653 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 181 selfloop transitions, 41 changer transitions 0/241 dead transitions. [2024-06-21 16:32:57,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 241 transitions, 2855 flow [2024-06-21 16:32:57,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:32:57,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:32:57,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 162 transitions. [2024-06-21 16:32:57,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5192307692307693 [2024-06-21 16:32:57,655 INFO L175 Difference]: Start difference. First operand has 141 places, 206 transitions, 2135 flow. Second operand 6 states and 162 transitions. [2024-06-21 16:32:57,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 241 transitions, 2855 flow [2024-06-21 16:32:58,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 241 transitions, 2678 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-21 16:32:58,146 INFO L231 Difference]: Finished difference. Result has 141 places, 213 transitions, 2150 flow [2024-06-21 16:32:58,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1964, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2150, PETRI_PLACES=141, PETRI_TRANSITIONS=213} [2024-06-21 16:32:58,147 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 86 predicate places. [2024-06-21 16:32:58,147 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 213 transitions, 2150 flow [2024-06-21 16:32:58,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 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) [2024-06-21 16:32:58,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:32:58,147 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:32:58,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 16:32:58,147 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:32:58,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:32:58,147 INFO L85 PathProgramCache]: Analyzing trace with hash 2036781092, now seen corresponding path program 4 times [2024-06-21 16:32:58,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:32:58,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964346906] [2024-06-21 16:32:58,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:32:58,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:32:58,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:32:58,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:32:58,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:32:58,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964346906] [2024-06-21 16:32:58,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964346906] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:32:58,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:32:58,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:32:58,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652535522] [2024-06-21 16:32:58,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:32:58,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:32:58,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:32:58,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:32:58,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:32:59,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-21 16:32:59,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 213 transitions, 2150 flow. Second operand has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:32:59,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:32:59,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-21 16:32:59,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:33:01,078 INFO L124 PetriNetUnfolderBase]: 10445/14642 cut-off events. [2024-06-21 16:33:01,078 INFO L125 PetriNetUnfolderBase]: For 526120/526124 co-relation queries the response was YES. [2024-06-21 16:33:01,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98287 conditions, 14642 events. 10445/14642 cut-off events. For 526120/526124 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 81307 event pairs, 3924 based on Foata normal form. 6/14640 useless extension candidates. Maximal degree in co-relation 98229. Up to 13963 conditions per place. [2024-06-21 16:33:01,224 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 195 selfloop transitions, 53 changer transitions 0/255 dead transitions. [2024-06-21 16:33:01,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 255 transitions, 2866 flow [2024-06-21 16:33:01,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:33:01,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:33:01,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-21 16:33:01,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4879807692307692 [2024-06-21 16:33:01,225 INFO L175 Difference]: Start difference. First operand has 141 places, 213 transitions, 2150 flow. Second operand 8 states and 203 transitions. [2024-06-21 16:33:01,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 255 transitions, 2866 flow [2024-06-21 16:33:01,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 255 transitions, 2781 flow, removed 21 selfloop flow, removed 3 redundant places. [2024-06-21 16:33:01,607 INFO L231 Difference]: Finished difference. Result has 146 places, 216 transitions, 2285 flow [2024-06-21 16:33:01,607 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2065, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2285, PETRI_PLACES=146, PETRI_TRANSITIONS=216} [2024-06-21 16:33:01,607 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 91 predicate places. [2024-06-21 16:33:01,607 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 216 transitions, 2285 flow [2024-06-21 16:33:01,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:01,608 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:33:01,608 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:33:01,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 16:33:01,608 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:33:01,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:33:01,608 INFO L85 PathProgramCache]: Analyzing trace with hash -90776516, now seen corresponding path program 2 times [2024-06-21 16:33:01,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:33:01,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553120927] [2024-06-21 16:33:01,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:33:01,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:33:01,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:33:02,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:33:02,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:33:02,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553120927] [2024-06-21 16:33:02,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553120927] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:33:02,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:33:02,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:33:02,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213640768] [2024-06-21 16:33:02,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:33:02,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:33:02,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:33:02,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:33:02,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:33:02,536 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-21 16:33:02,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 216 transitions, 2285 flow. Second operand has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:02,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:33:02,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-21 16:33:02,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:33:04,850 INFO L124 PetriNetUnfolderBase]: 10642/14924 cut-off events. [2024-06-21 16:33:04,850 INFO L125 PetriNetUnfolderBase]: For 582453/582470 co-relation queries the response was YES. [2024-06-21 16:33:04,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102281 conditions, 14924 events. 10642/14924 cut-off events. For 582453/582470 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 83125 event pairs, 3733 based on Foata normal form. 40/14956 useless extension candidates. Maximal degree in co-relation 102222. Up to 13751 conditions per place. [2024-06-21 16:33:04,986 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 201 selfloop transitions, 65 changer transitions 0/273 dead transitions. [2024-06-21 16:33:04,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 273 transitions, 3295 flow [2024-06-21 16:33:04,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:33:04,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:33:04,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 219 transitions. [2024-06-21 16:33:04,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5264423076923077 [2024-06-21 16:33:04,987 INFO L175 Difference]: Start difference. First operand has 146 places, 216 transitions, 2285 flow. Second operand 8 states and 219 transitions. [2024-06-21 16:33:04,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 273 transitions, 3295 flow [2024-06-21 16:33:05,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 273 transitions, 3101 flow, removed 46 selfloop flow, removed 6 redundant places. [2024-06-21 16:33:05,421 INFO L231 Difference]: Finished difference. Result has 148 places, 219 transitions, 2324 flow [2024-06-21 16:33:05,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2091, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2324, PETRI_PLACES=148, PETRI_TRANSITIONS=219} [2024-06-21 16:33:05,422 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 93 predicate places. [2024-06-21 16:33:05,422 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 219 transitions, 2324 flow [2024-06-21 16:33:05,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:05,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:33:05,423 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:33:05,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 16:33:05,423 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:33:05,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:33:05,423 INFO L85 PathProgramCache]: Analyzing trace with hash -318677666, now seen corresponding path program 3 times [2024-06-21 16:33:05,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:33:05,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407617066] [2024-06-21 16:33:05,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:33:05,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:33:05,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:33:06,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:33:06,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:33:06,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407617066] [2024-06-21 16:33:06,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407617066] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:33:06,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:33:06,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:33:06,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771450261] [2024-06-21 16:33:06,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:33:06,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:33:06,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:33:06,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:33:06,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:33:06,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-21 16:33:06,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 219 transitions, 2324 flow. Second operand has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:06,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:33:06,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-21 16:33:06,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:33:08,602 INFO L124 PetriNetUnfolderBase]: 10839/15207 cut-off events. [2024-06-21 16:33:08,602 INFO L125 PetriNetUnfolderBase]: For 628766/628783 co-relation queries the response was YES. [2024-06-21 16:33:08,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106641 conditions, 15207 events. 10839/15207 cut-off events. For 628766/628783 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 84830 event pairs, 3769 based on Foata normal form. 40/15239 useless extension candidates. Maximal degree in co-relation 106581. Up to 14034 conditions per place. [2024-06-21 16:33:08,793 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 211 selfloop transitions, 60 changer transitions 0/278 dead transitions. [2024-06-21 16:33:08,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 278 transitions, 3474 flow [2024-06-21 16:33:08,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:33:08,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:33:08,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 221 transitions. [2024-06-21 16:33:08,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.53125 [2024-06-21 16:33:08,794 INFO L175 Difference]: Start difference. First operand has 148 places, 219 transitions, 2324 flow. Second operand 8 states and 221 transitions. [2024-06-21 16:33:08,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 278 transitions, 3474 flow [2024-06-21 16:33:09,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 278 transitions, 3277 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-21 16:33:09,329 INFO L231 Difference]: Finished difference. Result has 150 places, 222 transitions, 2356 flow [2024-06-21 16:33:09,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2127, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2356, PETRI_PLACES=150, PETRI_TRANSITIONS=222} [2024-06-21 16:33:09,329 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 95 predicate places. [2024-06-21 16:33:09,329 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 222 transitions, 2356 flow [2024-06-21 16:33:09,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:09,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:33:09,330 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:33:09,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 16:33:09,330 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:33:09,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:33:09,330 INFO L85 PathProgramCache]: Analyzing trace with hash -82205636, now seen corresponding path program 4 times [2024-06-21 16:33:09,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:33:09,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786195778] [2024-06-21 16:33:09,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:33:09,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:33:09,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:33:10,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:33:10,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:33:10,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786195778] [2024-06-21 16:33:10,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786195778] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:33:10,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:33:10,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:33:10,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565552547] [2024-06-21 16:33:10,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:33:10,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:33:10,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:33:10,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:33:10,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:33:10,238 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-21 16:33:10,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 222 transitions, 2356 flow. Second operand has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:10,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:33:10,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-21 16:33:10,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:33:12,564 INFO L124 PetriNetUnfolderBase]: 10985/15417 cut-off events. [2024-06-21 16:33:12,565 INFO L125 PetriNetUnfolderBase]: For 666600/666617 co-relation queries the response was YES. [2024-06-21 16:33:12,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109408 conditions, 15417 events. 10985/15417 cut-off events. For 666600/666617 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 86371 event pairs, 3508 based on Foata normal form. 40/15449 useless extension candidates. Maximal degree in co-relation 109347. Up to 13459 conditions per place. [2024-06-21 16:33:12,742 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 200 selfloop transitions, 76 changer transitions 0/283 dead transitions. [2024-06-21 16:33:12,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 283 transitions, 3434 flow [2024-06-21 16:33:12,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:33:12,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:33:12,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 222 transitions. [2024-06-21 16:33:12,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5336538461538461 [2024-06-21 16:33:12,743 INFO L175 Difference]: Start difference. First operand has 150 places, 222 transitions, 2356 flow. Second operand 8 states and 222 transitions. [2024-06-21 16:33:12,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 283 transitions, 3434 flow [2024-06-21 16:33:13,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 283 transitions, 3241 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-21 16:33:13,287 INFO L231 Difference]: Finished difference. Result has 152 places, 225 transitions, 2429 flow [2024-06-21 16:33:13,288 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2163, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2429, PETRI_PLACES=152, PETRI_TRANSITIONS=225} [2024-06-21 16:33:13,288 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 97 predicate places. [2024-06-21 16:33:13,288 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 225 transitions, 2429 flow [2024-06-21 16:33:13,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.333333333333334) internal successors, (129), 9 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:13,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:33:13,288 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:33:13,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 16:33:13,288 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:33:13,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:33:13,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1152724787, now seen corresponding path program 2 times [2024-06-21 16:33:13,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:33:13,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242002061] [2024-06-21 16:33:13,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:33:13,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:33:13,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:33:14,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:33:14,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:33:14,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242002061] [2024-06-21 16:33:14,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242002061] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:33:14,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:33:14,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:33:14,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175817394] [2024-06-21 16:33:14,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:33:14,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:33:14,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:33:14,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:33:14,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:33:14,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-21 16:33:14,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 225 transitions, 2429 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 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) [2024-06-21 16:33:14,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:33:14,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-21 16:33:14,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:33:16,251 INFO L124 PetriNetUnfolderBase]: 10228/14632 cut-off events. [2024-06-21 16:33:16,251 INFO L125 PetriNetUnfolderBase]: For 682539/682554 co-relation queries the response was YES. [2024-06-21 16:33:16,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105578 conditions, 14632 events. 10228/14632 cut-off events. For 682539/682554 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 85163 event pairs, 3956 based on Foata normal form. 17/14631 useless extension candidates. Maximal degree in co-relation 105516. Up to 13619 conditions per place. [2024-06-21 16:33:16,694 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 182 selfloop transitions, 41 changer transitions 0/245 dead transitions. [2024-06-21 16:33:16,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 245 transitions, 2935 flow [2024-06-21 16:33:16,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:33:16,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:33:16,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-21 16:33:16,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49038461538461536 [2024-06-21 16:33:16,695 INFO L175 Difference]: Start difference. First operand has 152 places, 225 transitions, 2429 flow. Second operand 6 states and 153 transitions. [2024-06-21 16:33:16,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 245 transitions, 2935 flow [2024-06-21 16:33:17,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 245 transitions, 2675 flow, removed 56 selfloop flow, removed 6 redundant places. [2024-06-21 16:33:17,156 INFO L231 Difference]: Finished difference. Result has 152 places, 225 transitions, 2263 flow [2024-06-21 16:33:17,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2169, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2263, PETRI_PLACES=152, PETRI_TRANSITIONS=225} [2024-06-21 16:33:17,157 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 97 predicate places. [2024-06-21 16:33:17,157 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 225 transitions, 2263 flow [2024-06-21 16:33:17,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 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) [2024-06-21 16:33:17,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:33:17,157 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:33:17,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 16:33:17,157 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:33:17,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:33:17,158 INFO L85 PathProgramCache]: Analyzing trace with hash 675605905, now seen corresponding path program 1 times [2024-06-21 16:33:17,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:33:17,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853680129] [2024-06-21 16:33:17,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:33:17,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:33:17,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:33:17,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:33:17,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:33:17,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853680129] [2024-06-21 16:33:17,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853680129] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:33:17,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:33:17,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:33:17,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566566422] [2024-06-21 16:33:17,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:33:17,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:33:17,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:33:17,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:33:17,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:33:17,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-21 16:33:17,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 225 transitions, 2263 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 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) [2024-06-21 16:33:17,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:33:17,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-21 16:33:17,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:33:19,789 INFO L124 PetriNetUnfolderBase]: 9825/14217 cut-off events. [2024-06-21 16:33:19,789 INFO L125 PetriNetUnfolderBase]: For 607694/607696 co-relation queries the response was YES. [2024-06-21 16:33:19,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98642 conditions, 14217 events. 9825/14217 cut-off events. For 607694/607696 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 83287 event pairs, 3449 based on Foata normal form. 8/14163 useless extension candidates. Maximal degree in co-relation 98579. Up to 13276 conditions per place. [2024-06-21 16:33:19,935 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 222 selfloop transitions, 25 changer transitions 0/255 dead transitions. [2024-06-21 16:33:19,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 255 transitions, 3006 flow [2024-06-21 16:33:19,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:33:19,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:33:19,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 161 transitions. [2024-06-21 16:33:19,936 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5160256410256411 [2024-06-21 16:33:19,936 INFO L175 Difference]: Start difference. First operand has 152 places, 225 transitions, 2263 flow. Second operand 6 states and 161 transitions. [2024-06-21 16:33:19,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 255 transitions, 3006 flow [2024-06-21 16:33:20,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 255 transitions, 2891 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-21 16:33:20,413 INFO L231 Difference]: Finished difference. Result has 153 places, 229 transitions, 2260 flow [2024-06-21 16:33:20,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2148, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2260, PETRI_PLACES=153, PETRI_TRANSITIONS=229} [2024-06-21 16:33:20,413 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 98 predicate places. [2024-06-21 16:33:20,414 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 229 transitions, 2260 flow [2024-06-21 16:33:20,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 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) [2024-06-21 16:33:20,414 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:33:20,414 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:33:20,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 16:33:20,414 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:33:20,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:33:20,415 INFO L85 PathProgramCache]: Analyzing trace with hash 1152730739, now seen corresponding path program 2 times [2024-06-21 16:33:20,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:33:20,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639557013] [2024-06-21 16:33:20,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:33:20,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:33:20,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:33:21,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:33:21,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:33:21,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639557013] [2024-06-21 16:33:21,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639557013] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:33:21,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:33:21,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:33:21,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112650529] [2024-06-21 16:33:21,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:33:21,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:33:21,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:33:21,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:33:21,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:33:21,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-21 16:33:21,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 229 transitions, 2260 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 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) [2024-06-21 16:33:21,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:33:21,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-21 16:33:21,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:33:23,040 INFO L124 PetriNetUnfolderBase]: 9673/13943 cut-off events. [2024-06-21 16:33:23,040 INFO L125 PetriNetUnfolderBase]: For 626194/626196 co-relation queries the response was YES. [2024-06-21 16:33:23,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98275 conditions, 13943 events. 9673/13943 cut-off events. For 626194/626196 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 80690 event pairs, 3363 based on Foata normal form. 4/13890 useless extension candidates. Maximal degree in co-relation 98211. Up to 13060 conditions per place. [2024-06-21 16:33:23,196 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 216 selfloop transitions, 26 changer transitions 0/250 dead transitions. [2024-06-21 16:33:23,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 250 transitions, 2806 flow [2024-06-21 16:33:23,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:33:23,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:33:23,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-21 16:33:23,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5032051282051282 [2024-06-21 16:33:23,197 INFO L175 Difference]: Start difference. First operand has 153 places, 229 transitions, 2260 flow. Second operand 6 states and 157 transitions. [2024-06-21 16:33:23,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 250 transitions, 2806 flow [2024-06-21 16:33:23,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 250 transitions, 2755 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-21 16:33:23,685 INFO L231 Difference]: Finished difference. Result has 156 places, 229 transitions, 2270 flow [2024-06-21 16:33:23,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2209, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2270, PETRI_PLACES=156, PETRI_TRANSITIONS=229} [2024-06-21 16:33:23,685 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 101 predicate places. [2024-06-21 16:33:23,685 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 229 transitions, 2270 flow [2024-06-21 16:33:23,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 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) [2024-06-21 16:33:23,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:33:23,685 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:33:23,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 16:33:23,686 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:33:23,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:33:23,686 INFO L85 PathProgramCache]: Analyzing trace with hash 192667434, now seen corresponding path program 1 times [2024-06-21 16:33:23,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:33:23,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981570343] [2024-06-21 16:33:23,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:33:23,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:33:23,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:33:24,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:33:24,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:33:24,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981570343] [2024-06-21 16:33:24,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981570343] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:33:24,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:33:24,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:33:24,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604216786] [2024-06-21 16:33:24,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:33:24,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:33:24,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:33:24,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:33:24,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:33:24,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-21 16:33:24,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 229 transitions, 2270 flow. Second operand has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:24,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:33:24,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-21 16:33:24,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:33:27,493 INFO L124 PetriNetUnfolderBase]: 12896/18385 cut-off events. [2024-06-21 16:33:27,494 INFO L125 PetriNetUnfolderBase]: For 981175/981183 co-relation queries the response was YES. [2024-06-21 16:33:27,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 136433 conditions, 18385 events. 12896/18385 cut-off events. For 981175/981183 co-relation queries the response was YES. Maximal size of possible extension queue 727. Compared 110194 event pairs, 3803 based on Foata normal form. 86/18467 useless extension candidates. Maximal degree in co-relation 136368. Up to 14311 conditions per place. [2024-06-21 16:33:27,951 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 259 selfloop transitions, 62 changer transitions 0/328 dead transitions. [2024-06-21 16:33:27,951 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 328 transitions, 3966 flow [2024-06-21 16:33:27,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:33:27,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:33:27,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 287 transitions. [2024-06-21 16:33:27,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.551923076923077 [2024-06-21 16:33:27,952 INFO L175 Difference]: Start difference. First operand has 156 places, 229 transitions, 2270 flow. Second operand 10 states and 287 transitions. [2024-06-21 16:33:27,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 328 transitions, 3966 flow [2024-06-21 16:33:28,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 328 transitions, 3882 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 16:33:28,424 INFO L231 Difference]: Finished difference. Result has 162 places, 235 transitions, 2561 flow [2024-06-21 16:33:28,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2186, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2561, PETRI_PLACES=162, PETRI_TRANSITIONS=235} [2024-06-21 16:33:28,424 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 107 predicate places. [2024-06-21 16:33:28,425 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 235 transitions, 2561 flow [2024-06-21 16:33:28,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:28,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:33:28,425 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:33:28,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 16:33:28,425 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:33:28,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:33:28,426 INFO L85 PathProgramCache]: Analyzing trace with hash 969106210, now seen corresponding path program 2 times [2024-06-21 16:33:28,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:33:28,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336180238] [2024-06-21 16:33:28,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:33:28,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:33:28,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:33:29,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:33:29,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:33:29,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336180238] [2024-06-21 16:33:29,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336180238] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:33:29,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:33:29,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:33:29,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642703808] [2024-06-21 16:33:29,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:33:29,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:33:29,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:33:29,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:33:29,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:33:29,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-21 16:33:29,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 235 transitions, 2561 flow. Second operand has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:29,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:33:29,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-21 16:33:29,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:33:32,516 INFO L124 PetriNetUnfolderBase]: 13401/19224 cut-off events. [2024-06-21 16:33:32,517 INFO L125 PetriNetUnfolderBase]: For 1081610/1081618 co-relation queries the response was YES. [2024-06-21 16:33:32,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 146008 conditions, 19224 events. 13401/19224 cut-off events. For 1081610/1081618 co-relation queries the response was YES. Maximal size of possible extension queue 779. Compared 117767 event pairs, 4739 based on Foata normal form. 86/19306 useless extension candidates. Maximal degree in co-relation 145940. Up to 16146 conditions per place. [2024-06-21 16:33:32,787 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 251 selfloop transitions, 57 changer transitions 0/315 dead transitions. [2024-06-21 16:33:32,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 315 transitions, 3983 flow [2024-06-21 16:33:32,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:33:32,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:33:32,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 254 transitions. [2024-06-21 16:33:32,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5427350427350427 [2024-06-21 16:33:32,788 INFO L175 Difference]: Start difference. First operand has 162 places, 235 transitions, 2561 flow. Second operand 9 states and 254 transitions. [2024-06-21 16:33:32,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 315 transitions, 3983 flow [2024-06-21 16:33:33,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 315 transitions, 3833 flow, removed 44 selfloop flow, removed 5 redundant places. [2024-06-21 16:33:33,825 INFO L231 Difference]: Finished difference. Result has 167 places, 239 transitions, 2718 flow [2024-06-21 16:33:33,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2411, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2718, PETRI_PLACES=167, PETRI_TRANSITIONS=239} [2024-06-21 16:33:33,826 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 112 predicate places. [2024-06-21 16:33:33,826 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 239 transitions, 2718 flow [2024-06-21 16:33:33,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:33,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:33:33,827 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:33:33,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 16:33:33,827 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:33:33,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:33:33,827 INFO L85 PathProgramCache]: Analyzing trace with hash 311330166, now seen corresponding path program 3 times [2024-06-21 16:33:33,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:33:33,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567771016] [2024-06-21 16:33:33,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:33:33,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:33:33,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:33:35,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:33:35,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:33:35,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567771016] [2024-06-21 16:33:35,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567771016] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:33:35,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:33:35,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:33:35,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484165368] [2024-06-21 16:33:35,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:33:35,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:33:35,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:33:35,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:33:35,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:33:35,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-21 16:33:35,172 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 239 transitions, 2718 flow. Second operand has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:35,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:33:35,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-21 16:33:35,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:33:38,731 INFO L124 PetriNetUnfolderBase]: 13830/19857 cut-off events. [2024-06-21 16:33:38,731 INFO L125 PetriNetUnfolderBase]: For 1142680/1142688 co-relation queries the response was YES. [2024-06-21 16:33:38,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 149598 conditions, 19857 events. 13830/19857 cut-off events. For 1142680/1142688 co-relation queries the response was YES. Maximal size of possible extension queue 828. Compared 122324 event pairs, 5118 based on Foata normal form. 100/19953 useless extension candidates. Maximal degree in co-relation 149527. Up to 17969 conditions per place. [2024-06-21 16:33:38,942 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 243 selfloop transitions, 57 changer transitions 0/307 dead transitions. [2024-06-21 16:33:38,942 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 307 transitions, 3778 flow [2024-06-21 16:33:38,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:33:38,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:33:38,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 247 transitions. [2024-06-21 16:33:38,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5277777777777778 [2024-06-21 16:33:38,944 INFO L175 Difference]: Start difference. First operand has 167 places, 239 transitions, 2718 flow. Second operand 9 states and 247 transitions. [2024-06-21 16:33:38,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 307 transitions, 3778 flow [2024-06-21 16:33:40,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 307 transitions, 3634 flow, removed 41 selfloop flow, removed 5 redundant places. [2024-06-21 16:33:40,071 INFO L231 Difference]: Finished difference. Result has 171 places, 241 transitions, 2803 flow [2024-06-21 16:33:40,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2574, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2803, PETRI_PLACES=171, PETRI_TRANSITIONS=241} [2024-06-21 16:33:40,072 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 116 predicate places. [2024-06-21 16:33:40,072 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 241 transitions, 2803 flow [2024-06-21 16:33:40,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:40,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:33:40,072 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:33:40,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 16:33:40,073 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:33:40,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:33:40,073 INFO L85 PathProgramCache]: Analyzing trace with hash 334860714, now seen corresponding path program 4 times [2024-06-21 16:33:40,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:33:40,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002032455] [2024-06-21 16:33:40,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:33:40,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:33:40,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:33:41,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:33:41,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:33:41,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002032455] [2024-06-21 16:33:41,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002032455] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:33:41,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:33:41,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:33:41,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311199395] [2024-06-21 16:33:41,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:33:41,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:33:41,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:33:41,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:33:41,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:33:41,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-21 16:33:41,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 241 transitions, 2803 flow. Second operand has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:41,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:33:41,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-21 16:33:41,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:33:45,087 INFO L124 PetriNetUnfolderBase]: 14441/20937 cut-off events. [2024-06-21 16:33:45,087 INFO L125 PetriNetUnfolderBase]: For 1240911/1240913 co-relation queries the response was YES. [2024-06-21 16:33:45,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155983 conditions, 20937 events. 14441/20937 cut-off events. For 1240911/1240913 co-relation queries the response was YES. Maximal size of possible extension queue 885. Compared 132760 event pairs, 5097 based on Foata normal form. 92/21018 useless extension candidates. Maximal degree in co-relation 155910. Up to 18034 conditions per place. [2024-06-21 16:33:45,320 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 185 selfloop transitions, 116 changer transitions 0/308 dead transitions. [2024-06-21 16:33:45,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 308 transitions, 4139 flow [2024-06-21 16:33:45,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:33:45,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:33:45,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 255 transitions. [2024-06-21 16:33:45,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5448717948717948 [2024-06-21 16:33:45,322 INFO L175 Difference]: Start difference. First operand has 171 places, 241 transitions, 2803 flow. Second operand 9 states and 255 transitions. [2024-06-21 16:33:45,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 308 transitions, 4139 flow [2024-06-21 16:33:46,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 308 transitions, 3958 flow, removed 36 selfloop flow, removed 7 redundant places. [2024-06-21 16:33:46,342 INFO L231 Difference]: Finished difference. Result has 173 places, 243 transitions, 2967 flow [2024-06-21 16:33:46,342 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2622, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2967, PETRI_PLACES=173, PETRI_TRANSITIONS=243} [2024-06-21 16:33:46,343 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 118 predicate places. [2024-06-21 16:33:46,343 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 243 transitions, 2967 flow [2024-06-21 16:33:46,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:46,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:33:46,343 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:33:46,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 16:33:46,344 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:33:46,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:33:46,344 INFO L85 PathProgramCache]: Analyzing trace with hash 294896780, now seen corresponding path program 5 times [2024-06-21 16:33:46,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:33:46,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133141260] [2024-06-21 16:33:46,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:33:46,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:33:46,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:33:47,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:33:47,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:33:47,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133141260] [2024-06-21 16:33:47,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133141260] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:33:47,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:33:47,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:33:47,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339120238] [2024-06-21 16:33:47,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:33:47,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:33:47,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:33:47,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:33:47,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:33:47,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-21 16:33:47,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 243 transitions, 2967 flow. Second operand has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:47,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:33:47,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-21 16:33:47,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:33:51,679 INFO L124 PetriNetUnfolderBase]: 15860/23184 cut-off events. [2024-06-21 16:33:51,679 INFO L125 PetriNetUnfolderBase]: For 1390973/1390975 co-relation queries the response was YES. [2024-06-21 16:33:51,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 175295 conditions, 23184 events. 15860/23184 cut-off events. For 1390973/1390975 co-relation queries the response was YES. Maximal size of possible extension queue 1023. Compared 151725 event pairs, 5536 based on Foata normal form. 78/23251 useless extension candidates. Maximal degree in co-relation 175221. Up to 18089 conditions per place. [2024-06-21 16:33:52,123 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 197 selfloop transitions, 118 changer transitions 0/322 dead transitions. [2024-06-21 16:33:52,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 322 transitions, 4729 flow [2024-06-21 16:33:52,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:33:52,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:33:52,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 262 transitions. [2024-06-21 16:33:52,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5598290598290598 [2024-06-21 16:33:52,125 INFO L175 Difference]: Start difference. First operand has 173 places, 243 transitions, 2967 flow. Second operand 9 states and 262 transitions. [2024-06-21 16:33:52,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 322 transitions, 4729 flow [2024-06-21 16:33:53,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 322 transitions, 4422 flow, removed 40 selfloop flow, removed 7 redundant places. [2024-06-21 16:33:53,410 INFO L231 Difference]: Finished difference. Result has 176 places, 247 transitions, 3102 flow [2024-06-21 16:33:53,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2660, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3102, PETRI_PLACES=176, PETRI_TRANSITIONS=247} [2024-06-21 16:33:53,410 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 121 predicate places. [2024-06-21 16:33:53,410 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 247 transitions, 3102 flow [2024-06-21 16:33:53,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:53,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:33:53,411 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:33:53,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 16:33:53,411 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 16:33:53,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:33:53,411 INFO L85 PathProgramCache]: Analyzing trace with hash 300407030, now seen corresponding path program 6 times [2024-06-21 16:33:53,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:33:53,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98564331] [2024-06-21 16:33:53,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:33:53,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:33:53,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:33:54,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:33:54,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:33:54,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98564331] [2024-06-21 16:33:54,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98564331] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:33:54,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:33:54,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:33:54,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785047386] [2024-06-21 16:33:54,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:33:54,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:33:54,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:33:54,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:33:54,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:33:54,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-21 16:33:54,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 247 transitions, 3102 flow. Second operand has 10 states, 10 states have (on average 14.3) internal successors, (143), 10 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:33:54,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:33:54,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-21 16:33:54,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:33:58,824 INFO L124 PetriNetUnfolderBase]: 16289/23823 cut-off events. [2024-06-21 16:33:58,825 INFO L125 PetriNetUnfolderBase]: For 1466188/1466190 co-relation queries the response was YES. [2024-06-21 16:33:59,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 178761 conditions, 23823 events. 16289/23823 cut-off events. For 1466188/1466190 co-relation queries the response was YES. Maximal size of possible extension queue 1077. Compared 157233 event pairs, 5835 based on Foata normal form. 92/23904 useless extension candidates. Maximal degree in co-relation 178685. Up to 20750 conditions per place. [2024-06-21 16:33:59,322 INFO L140 encePairwiseOnDemand]: 38/52 looper letters, 183 selfloop transitions, 122 changer transitions 0/312 dead transitions. [2024-06-21 16:33:59,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 312 transitions, 4323 flow [2024-06-21 16:33:59,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:33:59,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:33:59,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 253 transitions. [2024-06-21 16:33:59,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5405982905982906 [2024-06-21 16:33:59,324 INFO L175 Difference]: Start difference. First operand has 176 places, 247 transitions, 3102 flow. Second operand 9 states and 253 transitions. [2024-06-21 16:33:59,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 312 transitions, 4323 flow